/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group.                                               *
* Copyright by the Board of Trustees of the University of Illinois.         *
* All rights reserved.                                                      *
*                                                                           *
* This file is part of HDF5.  The full HDF5 copyright notice, including     *
* terms governing use, modification, and redistribution, is contained in    *
* the files COPYING and Copyright.html.  COPYING can be found at the root   *
* of the source code distribution tree; Copyright.html can be found at the  *
* root level of an installed copy of the electronic HDF5 document set and   *
* is linked from the top-level documents page.  It can also be found at     *
* http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
* access to either file, you may request a copy from help@hdfgroup.org.     *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#include <stdio.h>
#include <stdlib.h>
#include "hdf5.h"
#include "H5private.h"

/*
 * The output functions need a temporary buffer to hold a piece of the
 * dataset while it's being printed. This constant sets the limit on the
 * size of that temporary buffer in bytes. For efficiency's sake, choose the
 * largest value suitable for your machine (for testing use a small value).
 */
/* Maximum size used in a call to malloc for a dataset 
 * NOTE: this value should stay in sync with the value defined in the tools
 *       library file: h5tools_utils.h 
 */
hsize_t H5TOOLS_MALLOCSIZE = (128 * 1024 * 1024);

/*-------------------------------------------------------------------------
* Program: h5diffgentest
*
* Purpose: generate files for h5diff testing
*
* Programmer: Pedro Vicente, pvn@ncsa.uiuc.edu
*
* Date: November 12, 2003
*
*-------------------------------------------------------------------------
*/

#define FILE1    "h5diff_basic1.h5"
#define FILE2    "h5diff_basic2.h5"
#define FILE3    "h5diff_types.h5"
#define FILE4    "h5diff_dtypes.h5"
#define FILE5    "h5diff_attr1.h5"
#define FILE6    "h5diff_attr2.h5"
#define FILE7    "h5diff_dset1.h5"
#define FILE8    "h5diff_dset2.h5"
#define FILE9    "h5diff_hyper1.h5"
#define FILE10   "h5diff_hyper2.h5"
#define FILE11   "h5diff_empty.h5"
#define FILE12   "h5diff_links.h5"
#define FILE13   "h5diff_softlinks.h5"
#define FILE14   "h5diff_linked_softlink.h5"
#define FILE15   "h5diff_extlink_src.h5"
#define FILE16   "h5diff_extlink_trg.h5"
#define FILE17   "h5diff_ext2softlink_src.h5"
#define FILE18   "h5diff_ext2softlink_trg.h5"
#define FILE19   "h5diff_dset_zero_dim_size1.h5"
#define FILE20   "h5diff_dset_zero_dim_size2.h5"
#define DANGLE_LINK_FILE1   "h5diff_danglelinks1.h5"
#define DANGLE_LINK_FILE2   "h5diff_danglelinks2.h5"
#define GRP_RECURSE_FILE1   "h5diff_grp_recurse1.h5"
#define GRP_RECURSE_FILE2   "h5diff_grp_recurse2.h5"
/* same structure via external links through files */
#define GRP_RECURSE1_EXT    "h5diff_grp_recurse_ext1.h5"
#define GRP_RECURSE2_EXT1   "h5diff_grp_recurse_ext2-1.h5"
#define GRP_RECURSE2_EXT2   "h5diff_grp_recurse_ext2-2.h5"
#define GRP_RECURSE2_EXT3   "h5diff_grp_recurse_ext2-3.h5"
/* same structure, same obj name with different value */
#define EXCLUDE_FILE1_1     "h5diff_exclude1-1.h5"
#define EXCLUDE_FILE1_2     "h5diff_exclude1-2.h5"
/* different structure and obj names */
#define EXCLUDE_FILE2_1     "h5diff_exclude2-1.h5"
#define EXCLUDE_FILE2_2     "h5diff_exclude2-2.h5"
/* only one file has unique objs  */
#define EXCLUDE_FILE3_1     "h5diff_exclude3-1.h5"
#define EXCLUDE_FILE3_2     "h5diff_exclude3-2.h5"
/* compound type with multiple vlen string types */
#define COMP_VL_STRS_FILE   "h5diff_comp_vl_strs.h5"
/* attribute compre with verbose level */
#define ATTR_VERBOSE_LEVEL_FILE1 "h5diff_attr_v_level1.h5"
#define ATTR_VERBOSE_LEVEL_FILE2 "h5diff_attr_v_level2.h5"
/* file containing valid/invalid enum value mix */
#define ENUM_INVALID_VALUES "h5diff_enum_invalid_values.h5"
/* file with container types (array,vlen) with multiple compounds */
#define COMPS_COMPLEX1   "compounds_array_vlen1.h5"
#define COMPS_COMPLEX2   "compounds_array_vlen2.h5"
/* non-comparable dataset and attribute */
#define NON_COMPARBLES1 "non_comparables1.h5"
#define NON_COMPARBLES2 "non_comparables2.h5"

#define UIMAX    4294967295u /*Maximum value for a variable of type unsigned int */
#define STR_SIZE 3
#define GBLL    ((unsigned long long) 1024 * 1024 *1024 )

#define MY_LINKCLASS 187

/* Dataspace of 0 dimension size */
#define SPACE1_RANK 2
#define SPACE1_DIM1 0
#define SPACE1_DIM2 0

/* A UD link traversal function.  Shouldn't actually be called. */
static hid_t UD_traverse(UNUSED const char * link_name, UNUSED hid_t cur_group,
                         UNUSED const void * udata, UNUSED size_t udata_size, UNUSED hid_t lapl_id)
{
    return -1;
}
const H5L_class_t UD_link_class[1] = {{
    H5L_LINK_CLASS_T_VERS,    /* H5L_class_t version       */
        (H5L_type_t)MY_LINKCLASS,             /* Link type id number            */
        "UD link class",          /* name for debugging             */
        NULL,                     /* Creation callback              */
        NULL,                     /* Move/rename callback           */
        NULL,                     /* Copy callback                  */
        UD_traverse,              /* The actual traversal function  */
        NULL,                     /* Deletion callback              */
        NULL                      /* Query callback                 */
}};


/*-------------------------------------------------------------------------
* prototypes
*-------------------------------------------------------------------------
*/

/* tests called in main() */
static int test_basic(const char *fname1, const char *fname2, const char *fname3);
static int test_types(const char *fname);
static int test_datatypes(const char *fname);
static int test_attributes(const char *fname,int make_diffs);
static int test_datasets(const char *fname,int make_diffs);
static int test_special_datasets(const char *fname,int make_diffs);
static int test_hyperslab(const char *fname,int make_diffs);
static int test_link_name(const char *fname1);
static int test_soft_links(const char *fname1);
static int test_linked_softlinks(const char *fname1);
static int test_external_links(const char *fname1, const char *fname2);
static int test_ext2soft_links(const char *fname1, const char *fname2);
static int test_dangle_links(const char *fname1, const char *fname2);
static int test_group_recurse(const char *fname1, const char *fname2);
static int test_group_recurse2(void);
static int test_exclude_obj1(const char *fname1, const char *fname2);
static int test_exclude_obj2(const char *fname1, const char *fname2);
static int test_exclude_obj3(const char *fname1, const char *fname2);
static int test_comp_vlen_strings(const char *fname1, const char *grp_name, int is_file_new);
static int test_attributes_verbose_level(const char *fname1, const char *fname2);
static int test_enums(const char *fname);
static void test_comps_array (const char *fname, const char *dset, const char *attr,int diff, int is_file_new);
static void test_comps_vlen (const char *fname, const char *dset,const char *attr, int diff, int is_file_new);
static void test_comps_array_vlen (const char *fname, const char *dset, const char *attr, int diff, int is_file_new);
static void test_comps_vlen_arry (const char *fname, const char *dset,const char *attr, int diff, int is_file_new);
static void test_data_nocomparables (const char *fname, int diff);
static void test_objs_nocomparables (const char *fname1, const char *fname2);

/* called by test_attributes() and test_datasets() */
static void write_attr_in(hid_t loc_id,const char* dset_name,hid_t fid,int make_diffs);
static void write_dset_in(hid_t loc_id,const char* dset_name,hid_t fid,int make_diffs);
static void gen_datareg(hid_t fid,int make_diffs);
/* utilities */
static int write_attr(hid_t loc_id,int rank,hsize_t *dims,const char *name,hid_t tid,void *buf);
static int write_dset(hid_t loc_id,int rank,hsize_t *dims,const char *name,hid_t tid,void *buf);


/*-------------------------------------------------------------------------
* Function: main
*
* Purpose: main program
*
*-------------------------------------------------------------------------
*/

int main(void)
{
    test_basic(FILE1, FILE2, FILE11);

    test_types (FILE3);
    test_datatypes(FILE4);

    /* generate 2 files, the second call creates a similar file with differences */
    test_attributes(FILE5,0);
    test_attributes(FILE6,1);

    /* test attributes with verbose level */
    test_attributes_verbose_level(ATTR_VERBOSE_LEVEL_FILE1, ATTR_VERBOSE_LEVEL_FILE2);

    /* generate 2 files, the second call creates a similar file with differences */
    test_datasets(FILE7,0);
    test_datasets(FILE8,1);

    /* generate 2 files, the second call creates a similar file with differences */
    test_hyperslab(FILE9,0);
    test_hyperslab(FILE10,1);

    test_link_name(FILE12);

    test_soft_links(FILE13);

    test_linked_softlinks(FILE14);

    test_external_links(FILE15, FILE16);

    test_ext2soft_links(FILE17, FILE18);

    /* generate 2 files, the second call creates a similar file with differences */
    test_special_datasets(FILE19,0);
    test_special_datasets(FILE20,1);

    test_dangle_links(DANGLE_LINK_FILE1, DANGLE_LINK_FILE2);

    test_group_recurse(GRP_RECURSE_FILE1, GRP_RECURSE_FILE2);
    test_group_recurse2();

    test_exclude_obj1(EXCLUDE_FILE1_1, EXCLUDE_FILE1_2);
    test_exclude_obj2(EXCLUDE_FILE2_1, EXCLUDE_FILE2_2);
    test_exclude_obj3(EXCLUDE_FILE3_1, EXCLUDE_FILE3_2);

    /* diff various multiple vlen and fixlen string types in a compound dataset */
    test_comp_vlen_strings(COMP_VL_STRS_FILE, "group", 1);
    test_comp_vlen_strings(COMP_VL_STRS_FILE, "group_copy", 0);

    /* diff when invalid enum values are present.
     * This will probably grow to involve more extensive testing of
     * enums so it has been given its own test file and test (apart
     * from the basic type testing).
     */
    test_enums(ENUM_INVALID_VALUES);

    /* -------------------------------------------------
     * Create test files with dataset and attribute with container types 
     * (array, vlen) with multiple nested compound types.
     */
    /* file1 */
    test_comps_array(COMPS_COMPLEX1,"dset1", "attr1", 0, 1);
    test_comps_vlen(COMPS_COMPLEX1,"dset2", "attr2", 0, 0);
    test_comps_array_vlen(COMPS_COMPLEX1,"dset3", "attr3", 0, 0);
    test_comps_vlen_arry(COMPS_COMPLEX1,"dset4", "attr4", 0, 0);
    /* file2 */
    test_comps_array(COMPS_COMPLEX2,"dset1", "attr1", 5, 1);
    test_comps_vlen(COMPS_COMPLEX2,"dset2", "attr2",5, 0);
    test_comps_array_vlen(COMPS_COMPLEX2,"dset3", "attr3", 5, 0);
    test_comps_vlen_arry(COMPS_COMPLEX2,"dset4", "attr4", 5, 0);

    /*-------------------------------------------------
     * Create test files with non-comparable dataset and attributes with 
     * comparable datasets and attributes.  All the comparables should display 
     * differences.
     */
    test_data_nocomparables(NON_COMPARBLES1,0);
    test_data_nocomparables(NON_COMPARBLES2,5);

    /* common objects (same name) with different object types. HDFFV-7644 */
    test_objs_nocomparables(NON_COMPARBLES1, NON_COMPARBLES2);

    return 0;
}

/*-------------------------------------------------------------------------
* Function: test_basic
*
* Purpose: Create basic test files, first two contains different data, the
* third one is just an empty file.
*
*-------------------------------------------------------------------------
*/

static
int test_basic(const char *fname1, const char *fname2, const char *fname3)
{
    hid_t   fid1, fid2;
    hid_t   gid1, gid2, gid3;
    hsize_t dims1[1] = { 6 };
    hsize_t dims2[2] = { 3,2 };

    /* create the empty file */
    if ((fid1=H5Fcreate(fname3, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT)) < 0){
        fprintf(stderr, "empty file (%s) creation failed.\n", fname3);
        goto out;
    }
    if (H5Fclose(fid1) < 0){
        fprintf(stderr, "empty file (%s) close failed.\n", fname3);
        goto out;
    }

    /*-------------------------------------------------------------------------
    * create two files
    *-------------------------------------------------------------------------
    */

    if (( fid1 = H5Fcreate (fname1, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT)) < 0 )
        goto out;
    if (( fid2 = H5Fcreate (fname2, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT)) < 0 )
        goto out;

    /*-------------------------------------------------------------------------
    * create groups
    *-------------------------------------------------------------------------
    */

    gid1 = H5Gcreate2(fid1, "g1", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    gid2 = H5Gcreate2(fid2, "g1", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    gid3 = H5Gcreate2(fid2, "g2", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);

    /*-------------------------------------------------------------------------
    * tests:
    * # 1.1 normal mode
    * # 1.2 normal mode with objects
    * # 1.3 report mode
    * # 1.4 report mode with objects
    * # 1.5 with -d
    *-------------------------------------------------------------------------
    */

    {
        double data1[3][2] = {{1,1},  {1,1},       {0,0}};
        double data2[3][2] = {{0,1.1},{1.01,1.001},{0,1}};
        double data3[3][2] = {{100,100},{100,100},{100,100}};
        double data4[3][2] = {{105,120},{160,95},{80,40}};

        write_dset(gid1,2,dims2,"dset1",H5T_NATIVE_DOUBLE,data1);
        write_dset(gid2,2,dims2,"dset2",H5T_NATIVE_DOUBLE,data2);
        write_dset(gid1,2,dims2,"dset3",H5T_NATIVE_DOUBLE,data3);
        write_dset(gid2,2,dims2,"dset4",H5T_NATIVE_DOUBLE,data4);
        write_dset(gid2,2,dims2,"dset1",H5T_NATIVE_DOUBLE,data2);

    }
    /*-------------------------------------------------------------------------
    * relative error, compare divide by zero, both zero
    * # 1.6.1 with -p (int)
    *-------------------------------------------------------------------------
    */
    {
        int data5[3][2] = {{100,100},{100,0},{0,100}};
        int data6[3][2] = {{120,80}, {0,100},{0,50}};

        write_dset(gid1,2,dims2,"dset5",H5T_NATIVE_INT,data5);
        write_dset(gid1,2,dims2,"dset6",H5T_NATIVE_INT,data6);

    }

    /*-------------------------------------------------------------------------
    * relative error, compare divide by zero, both zero
    * # 1.6.2 with -p (unsigned long long)
    *-------------------------------------------------------------------------
    */
    {
        unsigned long long data7[3][2] = {{100,100},{100,0},{0,100}};
        unsigned long long data8[3][2] = {{120,80}, {0,100},{0,50}};

        write_dset(gid1,2,dims2,"dset7",H5T_NATIVE_ULLONG,data7);
        write_dset(gid1,2,dims2,"dset8",H5T_NATIVE_ULLONG,data8);

    }

    /*-------------------------------------------------------------------------
    * relative error, compare divide by zero, both zero
    * # 1.6.3 with -p (double)
    *
    *   A   B   1-B/A   %
    *   100 120 0.2     20
    *   100 80  0.2     20
    *   100 0   1       100
    *   0   100 #DIV/0! #DIV/0!
    *   0   0   #DIV/0! #DIV/0!
    *   100 50  0.5     50
    *-------------------------------------------------------------------------
    */
    {
        double data9[3][2] = {{100,100},{100,0},{0,100}};
        double data10[3][2] ={{120,80}, {0,100},{0,50}};

        write_dset(gid1,2,dims2,"dset9",H5T_NATIVE_DOUBLE,data9);
        write_dset(gid1,2,dims2,"dset10",H5T_NATIVE_DOUBLE,data10);

    }


    /*-------------------------------------------------------------------------
    * test floating point comparison
    *-------------------------------------------------------------------------
    */
    {
        /* epsilon = 0.0000001 = 1e-7
         * system epsilon for float : FLT_EPSILON = 1.19209E-07
         */
        float  data11[3][2] ={{0.000000f,0.0000001f},{0.0000001f, 0.00000022f},{0.0000001f,0.0000001f}};
        float  data12[3][2] ={{0.000000f,0.0000002f},{0.0000003f,0.0000001f},{0.000000f,0.0000001f}};
        /* epsilon = 0.0000000000000001 = 1e-16
         * system epsilon for double : DBL_EPSILON = 2.22045E-16
         */
        double data13[3][2] ={{0.0000000000000000, 0.0000000000000001},{0.0000000000000001, 0.0000000000000000},{0.00000000000000033, 0.0000000000000001}};
        double data14[3][2] ={{0.0000000000000000, 0.0000000000000004},{0.0000000000000002, 0.0000000000000001},{0.0000000000000001, 0.00000000000000000}};

        write_dset(gid1,2,dims2,"fp1",H5T_NATIVE_FLOAT,data11);
        write_dset(gid1,2,dims2,"fp2",H5T_NATIVE_FLOAT,data12);
        write_dset(gid1,2,dims2,"d1",H5T_NATIVE_DOUBLE,data13);
        write_dset(gid1,2,dims2,"d2",H5T_NATIVE_DOUBLE,data14);

    }


#if H5_SIZEOF_LONG_DOUBLE !=0
    {

        /*-------------------------------------------------------------------------
        * H5T_NATIVE_LDOUBLE
        *-------------------------------------------------------------------------
        */

        long double data15[3][2] ={{1,1},{1,1},{1,1}};

        write_dset(gid1,2,dims2,"ld",H5T_NATIVE_LDOUBLE,data15);

    }
#endif



    /*-------------------------------------------------------------------------
    * NaNs in H5T_NATIVE_FLOAT
    *-------------------------------------------------------------------------
    */
    {

        float data15[6];
        float data16[6];

        data15[0] = (float) sqrt( (double)-1 );
        data15[1] = 1;
        data15[2] = (float) sqrt( (double)-1 );
        data15[3] = 1;
        data15[4] = 1;
        data15[5] = 1;

        data16[0] = (float) sqrt( (double)-1 );
        data16[1] = (float) sqrt( (double)-1 );
        data16[2] = 1;
        data16[3] = 1;
        data16[4] = 1;
        data16[5] = 1;

        write_dset(gid1,1,dims1,"fp15",H5T_NATIVE_FLOAT,data15);
        write_dset(gid1,1,dims1,"fp16",H5T_NATIVE_FLOAT,data16);

    }

    /*-------------------------------------------------------------------------
    * NaNs in H5T_NATIVE_DOUBLE
    *-------------------------------------------------------------------------
    */
    {

        double data17[6];
        double data18[6];

        data17[0] = sqrt( (double)-1 );
        data17[1] = 1;
        data17[2] = sqrt( (double)-1 );
        data17[3] = 1;
        data17[4] = 1;
        data17[5] = 1;

        data18[0] = (float) sqrt( (double)-1 );
        data18[1] = (float) sqrt( (double)-10000 );
        data18[2] = 1;
        data18[3] = 1;
        data18[4] = 1;
        data18[5] = 1;

        write_dset(gid1,1,dims1,"fp17",H5T_NATIVE_DOUBLE,data17);
        write_dset(gid1,1,dims1,"fp18",H5T_NATIVE_DOUBLE,data18);
        write_dset(gid1,1,dims1,"fp18_COPY",H5T_NATIVE_DOUBLE,data18);
    }

    /*------------------------------------------------------------------------
     *            INFINITY values
     *------------------------------------------------------------------------
     */
    {
        float  data19[6];
        double data20[6];

        data19[0] = data19[1] = data19[2] = log(0);
        data19[3] = data19[4] = data19[5] = -log(0);

        data20[0] = data20[1] = data20[2] = log(0);
        data20[3] = data20[4] = data20[5] = -log(0);

        write_dset(gid1,1,dims1,"fp19",H5T_NATIVE_FLOAT,data19);
        write_dset(gid1,1,dims1,"fp19_COPY",H5T_NATIVE_FLOAT,data19);
        write_dset(gid1,1,dims1,"fp20",H5T_NATIVE_DOUBLE,data20);
        write_dset(gid1,1,dims1,"fp20_COPY",H5T_NATIVE_DOUBLE,data20);
    }

    /*-------------------------------------------------------------------------
    * NaNs in H5T_NATIVE_DOUBLE and H5T_NATIVE_FLOAT inside H5T_COMPOUND
    *-------------------------------------------------------------------------
    */
    {
        typedef struct cmp1_t
        {
            double d;
            float  f;
        } cmp1_t;

        cmp1_t   buf1[2];
        cmp1_t   buf2[2];
        hsize_t  dims[1] = {2};
        size_t   type_size;
        hid_t    tid;

        buf1[0].d = sqrt( (double)-1 );
        buf1[0].f = (float) sqrt( (double)-1 );
        buf2[0].d = sqrt( (double)-1 );
        buf2[0].f = (float) sqrt( (double)-1 );

        buf1[1].d = sqrt( (double)-1 );
        buf1[1].f = (float) sqrt( (double)-1 );
        buf2[1].d = 0;
        buf2[1].f = 0;

        type_size = sizeof( cmp1_t );
        tid = H5Tcreate (H5T_COMPOUND, type_size );
        H5Tinsert(tid, "d", HOFFSET( cmp1_t, d ), H5T_NATIVE_DOUBLE );
        H5Tinsert(tid, "f", HOFFSET( cmp1_t, f ), H5T_NATIVE_FLOAT );
        write_dset(gid1,1,dims,"dset11",tid,buf1);
        write_dset(gid1,1,dims,"dset12",tid,buf2);
        H5Tclose(tid);


    }

    /* not comparable objects */
    {

        typedef struct cmp1_t
        {
            double d;
            int    i;
        } cmp1_t;

        typedef struct cmp2_t
        {
            int    i;
            double d;
        } cmp2_t;

        typedef struct cmp3_t
        {
            int i;
        } cmp3_t;

        double       data2[6] = {0,0,0,0,0,0};
        int          data3[6] = {0,0,0,0,0,0};
        int          data4[3][2] = {{0,0},{0,0},{0,0}};
        int          data5[2][2] = {{0,0},{0,0}};
        unsigned int data6[3][2] = {{0,0},{0,0},{0,0}};
        cmp1_t       data7[1] = {{1.0f, 2}};
        cmp2_t       data8[1] = {{1, 2.0f}};
        hsize_t      dims3[2] = {2, 2};
        hsize_t      dims4[1] = {1};
        size_t       type_size;
        hid_t        tid;



        write_dset(gid3,1,dims1,"dset1",H5T_NATIVE_DOUBLE,NULL);
        write_dset(gid3,1,dims1,"dset2",H5T_NATIVE_DOUBLE,data2);
        write_dset(gid3,1,dims1,"dset3",H5T_NATIVE_INT,data3);
        write_dset(gid3,2,dims2,"dset4",H5T_NATIVE_INT,data4);
        write_dset(gid3,2,dims3,"dset5",H5T_NATIVE_INT,data5);
        write_dset(gid3,2,dims2,"dset6",H5T_NATIVE_UINT,data6);

        /* case of compound with different type members */
        type_size = sizeof( cmp1_t );
        tid = H5Tcreate (H5T_COMPOUND, type_size );
        H5Tinsert(tid, "d", HOFFSET( cmp1_t, d ), H5T_NATIVE_DOUBLE );
        H5Tinsert(tid, "i", HOFFSET( cmp1_t, i ), H5T_NATIVE_INT );
        write_dset(gid3,1,dims4,"dset7",tid,data7);
        H5Tclose(tid);

        type_size = sizeof( cmp2_t );
        tid = H5Tcreate (H5T_COMPOUND, type_size );
        H5Tinsert(tid, "i", HOFFSET( cmp2_t, i ), H5T_NATIVE_INT  );
        H5Tinsert(tid, "d", HOFFSET( cmp2_t, d ), H5T_NATIVE_DOUBLE );
        write_dset(gid3,1,dims4,"dset8",tid,data8);
        H5Tclose(tid);

        /* case of compound with different number of members */
        type_size = sizeof( cmp3_t );
        tid = H5Tcreate (H5T_COMPOUND, type_size );
        H5Tinsert(tid, "i", HOFFSET( cmp2_t, i ), H5T_NATIVE_INT  );
        write_dset(gid3,1,dims4,"dset9",tid,NULL);
        H5Tclose(tid);

    }


    /*-------------------------------------------------------------------------
    * close
    *-------------------------------------------------------------------------
    */
    H5Gclose(gid1);
    H5Gclose(gid2);
    H5Gclose(gid3);
    H5Fclose(fid1);
    H5Fclose(fid2);
    return SUCCEED;

out:

    return FAIL;
}


/*-------------------------------------------------------------------------
* Function: test_types
*
* Purpose: Compare different HDF5 object & link types:
* H5G_DATASET, H5G_TYPE, H5G_GROUP, H5G_LINK, H5G_UDLINK
*
*-------------------------------------------------------------------------
*/
static
int test_types(const char *fname)
{
    hid_t   fid1;
    hid_t   gid1;
    hid_t   gid2;
    hid_t   tid1;
    hid_t   tid2;
    herr_t  status;
    hsize_t dims[1]={1};
    typedef struct s1_t
    {
        int    a;
        float  b;
    } s1_t;
    typedef struct s2_t
    {
        int    a;
    } s2_t;

    /*-------------------------------------------------------------------------
    * Create one file
    *-------------------------------------------------------------------------
    */
    fid1 = H5Fcreate (fname, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);

    /*-------------------------------------------------------------------------
    * H5G_DATASET
    *-------------------------------------------------------------------------
    */
    write_dset(fid1,1,dims,"dset",H5T_NATIVE_INT,0);

    /*-------------------------------------------------------------------------
    * H5G_GROUP
    *-------------------------------------------------------------------------
    */
    gid1 = H5Gcreate2(fid1, "g1", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    status = H5Gclose(gid1);
    gid2 = H5Gcreate2(fid1, "g2", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    status = H5Gclose(gid2);

    /*-------------------------------------------------------------------------
    * H5G_TYPE
    *-------------------------------------------------------------------------
    */

    /* create and commit datatype 1 */
    tid1 = H5Tcreate(H5T_COMPOUND, sizeof(s1_t));
    H5Tinsert(tid1, "a", HOFFSET(s1_t, a), H5T_NATIVE_INT);
    H5Tinsert(tid1, "b", HOFFSET(s1_t, b), H5T_NATIVE_FLOAT);
    H5Tcommit2(fid1, "t1", tid1, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    H5Tclose(tid1);
    /* create and commit datatype 2 */
    tid2 = H5Tcreate(H5T_COMPOUND, sizeof(s2_t));
    H5Tinsert(tid2, "a", HOFFSET(s2_t, a), H5T_NATIVE_INT);
    H5Tcommit2(fid1, "t2", tid2, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    H5Tclose(tid2);

    /*-------------------------------------------------------------------------
    * H5G_LINK
    *-------------------------------------------------------------------------
    */

    status = H5Lcreate_soft("g1", fid1, "l1", H5P_DEFAULT, H5P_DEFAULT);
    status = H5Lcreate_soft("g2", fid1, "l2", H5P_DEFAULT, H5P_DEFAULT);

    /*-------------------------------------------------------------------------
    * H5G_UDLINK
    *-------------------------------------------------------------------------
    */
    H5Lcreate_external("filename", "objname", fid1, "ext_link", H5P_DEFAULT, H5P_DEFAULT);
    H5Lregister(UD_link_class);
    H5Lcreate_ud(fid1, "ud_link", (H5L_type_t)MY_LINKCLASS, NULL, (size_t)0, H5P_DEFAULT, H5P_DEFAULT);

    /*-------------------------------------------------------------------------
    * Close
    *-------------------------------------------------------------------------
    */
    status = H5Fclose(fid1);
    return status;
}


/*

# ##############################################################################
# # not comparable types
# ##############################################################################

# 2.0
TOOLTEST h5diff_20.txt file3.h5 file3.h5 -v dset g1

# 2.1
TOOLTEST h5diff_21.txt file3.h5 file3.h5 -v dset l1

# 2.2
TOOLTEST h5diff_22.txt file3.h5 file3.h5 -v dset t1

# ##############################################################################
# # compare groups, types, links (no differences and differences)
# ##############################################################################

# 2.3
TOOLTEST h5diff_23.txt file3.h5 file3.h5 -v g1 g1

# 2.4
TOOLTEST h5diff_24.txt file3.h5 file3.h5 -v t1 t1

# 2.5
TOOLTEST h5diff_25.txt file3.h5 file3.h5 -v l1 l1

# 2.6
TOOLTEST h5diff_26.txt file3.h5 file3.h5 -v g1 g2

# 2.7
TOOLTEST h5diff_27.txt file3.h5 file3.h5 -v t1 t2

# 2.8
TOOLTEST h5diff_28.txt file3.h5 file3.h5 -v l1 l2
*/

/*-------------------------------------------------------------------------
* Function: test_datatypes
*
* Purpose: test dataset datatypes
*
*-------------------------------------------------------------------------
*/
static
int test_datatypes(const char *fname)
{

    hid_t   fid1;
    hid_t   dset;
    hsize_t dims[2]={3,2};
    herr_t  status;
    char    buf1a[3][2] = {{1,1},{1,1},{1,1}};
    char    buf1b[3][2] = {{1,1},{3,4},{5,6}};
    short   buf2a[3][2] = {{1,1},{1,1},{1,1}};
    short   buf2b[3][2] = {{1,1},{3,4},{5,6}};
    int     buf3a[3][2] = {{1,1},{1,1},{1,1}};
    int     buf3b[3][2] = {{1,1},{3,4},{5,6}};
    long    buf4a[3][2] = {{1,1},{1,1},{1,1}};
    long    buf4b[3][2] = {{1,1},{3,4},{5,6}};
    float   buf5a[3][2] = {{1,1},{1,1},{1,1}};
    float   buf5b[3][2] = {{1,1},{3,4},{5,6}};
    double  buf6a[3][2] = {{1,1},{1,1},{1,1}};
    double  buf6b[3][2] = {{1,1},{3,4},{5,6}};

    /*unsigned/signed test
    signed char -128 to 127
    unsigned char 0 to 255
    */
    char          buf7a[3][2] = {{-1,-128},{-1,-1},{-1,-1}};
    unsigned char buf7b[3][2] = {{1,128},{1,1},{1,1}};

    /* long long test */
    long long            buf8a[3][2] = {{1,1},{1,1},{1,1}};
    long long            buf8b[3][2] = {{1,1},{3,4},{5,6}};
    unsigned long long   buf9a[3][2] = {{1,1},{1,1},{1,1}};
    unsigned long long   buf9b[3][2] = {{1,1},{3,4},{5,6}};

    unsigned int    buf10a[3][2] = {{UIMAX,1},{1,1},{1,1}};
    unsigned int    buf10b[3][2] = {{UIMAX-1,1},{3,4},{5,6}};

    unsigned short     buf11a[3][2] = {{204,205},{2,3},{1,1}};
    unsigned int     buf11b[3][2] = {{204,205},{2,3},{1,1}};


    /*-------------------------------------------------------------------------
    * Create a file
    *-------------------------------------------------------------------------
    */
    fid1 = H5Fcreate (fname, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);

    /*-------------------------------------------------------------------------
    * Check for different storage order. Give a warning if they are different
    *-------------------------------------------------------------------------
    */

    write_dset(fid1,2,dims,"dset0a",H5T_STD_I16LE,buf2a);
    write_dset(fid1,2,dims,"dset0b",H5T_STD_I32LE,buf3b);

    /*-------------------------------------------------------------------------
    * H5T_NATIVE_CHAR
    *-------------------------------------------------------------------------
    */
    write_dset(fid1,2,dims,"dset1a",H5T_NATIVE_CHAR,buf1a);
    write_dset(fid1,2,dims,"dset1b",H5T_NATIVE_CHAR,buf1b);

    /*-------------------------------------------------------------------------
    * H5T_NATIVE_SHORT
    *-------------------------------------------------------------------------
    */
    write_dset(fid1,2,dims,"dset2a",H5T_NATIVE_SHORT,buf2a);
    write_dset(fid1,2,dims,"dset2b",H5T_NATIVE_SHORT,buf2b);

    /*-------------------------------------------------------------------------
    * H5T_NATIVE_INT
    *-------------------------------------------------------------------------
    */
    write_dset(fid1,2,dims,"dset3a",H5T_NATIVE_INT,buf3a);
    write_dset(fid1,2,dims,"dset3b",H5T_NATIVE_INT,buf3b);

    /*-------------------------------------------------------------------------
    * H5T_NATIVE_LONG
    *-------------------------------------------------------------------------
    */
    write_dset(fid1,2,dims,"dset4a",H5T_NATIVE_LONG,buf4a);
    write_dset(fid1,2,dims,"dset4b",H5T_NATIVE_LONG,buf4b);

    /*-------------------------------------------------------------------------
    * H5T_NATIVE_FLOAT
    *-------------------------------------------------------------------------
    */
    write_dset(fid1,2,dims,"dset5a",H5T_NATIVE_FLOAT,buf5a);
    write_dset(fid1,2,dims,"dset5b",H5T_NATIVE_FLOAT,buf5b);

    /*-------------------------------------------------------------------------
    * H5T_NATIVE_DOUBLE
    *-------------------------------------------------------------------------
    */

    write_dset(fid1,2,dims,"dset6a",H5T_NATIVE_DOUBLE,buf6a);
    write_dset(fid1,2,dims,"dset6b",H5T_NATIVE_DOUBLE,buf6b);

    /*-------------------------------------------------------------------------
    * H5T_NATIVE_CHAR and H5T_NATIVE_UCHAR
    *-------------------------------------------------------------------------
    */

    write_dset(fid1,2,dims,"dset7a",H5T_NATIVE_CHAR,buf7a);
    write_dset(fid1,2,dims,"dset7b",H5T_NATIVE_UCHAR,buf7b);

    /*-------------------------------------------------------------------------
    * H5T_NATIVE_LLONG
    *-------------------------------------------------------------------------
    */

    write_dset(fid1,2,dims,"dset8a",H5T_NATIVE_LLONG,buf8a);
    write_dset(fid1,2,dims,"dset8b",H5T_NATIVE_LLONG,buf8b);

    /*-------------------------------------------------------------------------
    * H5T_NATIVE_ULLONG
    *-------------------------------------------------------------------------
    */

    write_dset(fid1,2,dims,"dset9a",H5T_NATIVE_ULLONG,buf9a);
    write_dset(fid1,2,dims,"dset9b",H5T_NATIVE_ULLONG,buf9b);

    /*-------------------------------------------------------------------------
    * H5T_NATIVE_INT
    *-------------------------------------------------------------------------
    */

    write_dset(fid1,2,dims,"dset10a",H5T_NATIVE_UINT,buf10a);
    write_dset(fid1,2,dims,"dset10b",H5T_NATIVE_UINT,buf10b);

    /*-------------------------------------------------------------------------
    * Same type class, different size
    *-------------------------------------------------------------------------
    */
    write_dset(fid1,2,dims,"dset11a",H5T_STD_U16LE,buf11a);
    dset=H5Dopen2 (fid1, "dset11a", H5P_DEFAULT);
    write_attr(dset,2,dims,"attr",H5T_STD_U16LE,buf11a);
    H5Dclose (dset);

    write_dset(fid1,2,dims,"dset11b",H5T_STD_U32LE,buf11b);
    dset=H5Dopen2 (fid1, "dset11b", H5P_DEFAULT);
    write_attr(dset,2,dims,"attr",H5T_STD_U32LE,buf11b);
    H5Dclose (dset);

    /*-------------------------------------------------------------------------
    * Close
    *-------------------------------------------------------------------------
    */
    status = H5Fclose(fid1);
    return status;
}

/*
# ##############################################################################
# # Dataset datatypes
# ##############################################################################

# 5.0
TOOLTEST h5diff_50.txt file4.h5 file4.h5 -v dset0a dset0b

# 5.1
TOOLTEST h5diff_51.txt file4.h5 file4.h5 -v dset1a dset1b

# 5.2
TOOLTEST h5diff_52.txt file4.h5 file4.h5 -v dset2a dset2b

# 5.3
TOOLTEST h5diff_53.txt file4.h5 file4.h5 -v dset3a dset4b

# 5.4
TOOLTEST h5diff_54.txt file4.h5 file4.h5 -v dset4a dset4b

# 5.5
TOOLTEST h5diff_55.txt file4.h5 file4.h5 -v dset5a dset5b

# 5.6
TOOLTEST h5diff_56.txt file4.h5 file4.h5 -v dset6a dset6b

# 5.7
TOOLTEST h5diff_57.txt file4.h5 file4.h5 -v dset7a dset7b

# 5.8 (region reference)
TOOLTEST h5diff_58.txt file7.h5 file8.h5 -v refreg
*/

/*-------------------------------------------------------------------------
* Function: test_attributes
*
* Purpose: test attributes
*
*-------------------------------------------------------------------------
*/
static
int test_attributes(const char *file,
                    int make_diffs /* flag to modify data buffers */)
{
    hid_t   fid;
    hid_t   did;
    hid_t   gid;
    hid_t   root_id;
    hid_t   sid;
    hsize_t dims[1]={2};
    herr_t  status;

    /* Create a file  */
    if((fid  = H5Fcreate(file, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT)) < 0)
        return -1;

    /* Create a 1D dataset */
    sid = H5Screate_simple(1, dims, NULL);
    did = H5Dcreate2(fid, "dset", H5T_NATIVE_INT, sid, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    status = H5Sclose(sid);
    assert(status >= 0);

    /* Create groups */
    gid  = H5Gcreate2(fid, "g1", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    root_id   = H5Gopen2(fid, "/", H5P_DEFAULT);

    /*-------------------------------------------------------------------------
    * write a series of attributes on the dataset, group, and root group
    *-------------------------------------------------------------------------
    */

    write_attr_in(did,"dset",fid,make_diffs);
    write_attr_in(gid,NULL,(hid_t)0,make_diffs);
    write_attr_in(root_id,NULL,(hid_t)0,make_diffs);


    /* Close */
    status = H5Dclose(did);
    assert(status >= 0);
    status = H5Gclose(gid);
    assert(status >= 0);
    status = H5Gclose(root_id);
    assert(status >= 0);

    /* Close file */
    status = H5Fclose(fid);
    assert(status >= 0);
    return status;
}


/*-------------------------------------------------------------------------
* Function: test_attributes_verbose_level
*
* Purpose: Cresting test files for testing attributes along with
* levels of verbos option
*
*-------------------------------------------------------------------------
*/
static int test_attributes_verbose_level(const char *fname1, const char *fname2)
{
    herr_t  status = SUCCEED;
    hid_t   fid1, fid2;
    hid_t   f1_gid, f2_gid;
    hid_t   f1_gid2, f2_gid2;
    hid_t   f1_gid3, f2_gid3;
    hid_t   f1_gid4, f2_gid4;
    hid_t   f1_did, f2_did;
    hid_t   f1_sid, f2_sid;
    hid_t   f1_tid, f2_tid;
    /* dset */
    hsize_t dset_dims[1]={3};
    int dset_data[3] = {0,1,2};

    /* common attrs dim */
    hsize_t attr_dims[1]={2};

    /* file1 attr */
    int    f1_attr_idata[2]= {1,2};        /* integer */
    float  f1_attr_fdata[2]= {1.1,2.2};    /* float */
    /* file2 attr */
    int    f2_attr_idata[2]= {2,3};        /* integer */
    float  f2_attr_fdata[2]= {2.1,3.2};    /* float */


    /*----------------------------------------------------------------------
    * Create file1
    *-----------------------------------------------------------------------*/
    if((fid1  = H5Fcreate(fname1, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT)) < 0)
    {
        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname1);
        status = FAIL;
        goto out;
    }

   /*----------------------------------
    * Groups
    */
    f1_gid = H5Gcreate2(fid1, "g", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (f1_gid < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    f1_gid2 = H5Gcreate2(fid1, "g2", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (f1_gid2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    f1_gid3 = H5Gcreate2(fid1, "g3", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (f1_gid3 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    f1_gid4 = H5Gcreate2(fid1, "g4", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (f1_gid4 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname2);
        status = FAIL;
        goto out;
    }

   /*----------------------------------
    * Datasets
    */
    f1_sid = H5Screate_simple(1, dset_dims, NULL);
    f1_did = H5Dcreate2(fid1, "dset", H5T_NATIVE_INT, f1_sid, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (f1_did == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }
    status = H5Dwrite(f1_did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, dset_data);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Dwrite failed.\n", fname1);
        status = FAIL;
        goto out;
    }

   /*----------------------------------
    * Named Datatype
    */
    f1_tid = H5Tcopy(H5T_NATIVE_INT);
    status = H5Tcommit2(fid1, "ntype", f1_tid, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Tcommit2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }




    /*----------------------------------------------------------------------
    * Create file2
    *-----------------------------------------------------------------------*/
    if((fid2  = H5Fcreate(fname2, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT)) < 0)
    {
        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname2);
        status = FAIL;
        goto out;
    }

   /*----------------------------------
    * Groups
    */
    f2_gid = H5Gcreate2(fid2, "g", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (f2_gid < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    f2_gid2 = H5Gcreate2(fid2, "g2", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (f2_gid2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    f2_gid3 = H5Gcreate2(fid2, "g3", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (f2_gid3 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    f2_gid4 = H5Gcreate2(fid2, "g4", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (f2_gid4 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname2);
        status = FAIL;
        goto out;
    }

   /*----------------------------------
    * Datasets
    */
    f2_sid = H5Screate_simple(1, dset_dims, NULL);
    f2_did = H5Dcreate2(fid2, "dset", H5T_NATIVE_INT, f2_sid, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (f2_did == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }
    status = H5Dwrite(f2_did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, dset_data);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Dwrite failed.\n", fname2);
        status = FAIL;
        goto out;
    }

   /*----------------------------------
    * Named Datatype
    */
    f2_tid = H5Tcopy(H5T_NATIVE_INT);
    status = H5Tcommit2(fid2, "ntype", f2_tid, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Tcommit2 failed.\n", fname2);
        status = FAIL;
        goto out;
    }

   /*----------------------------------
    * CASE1 - Same attr number, all Same attr name
    * add attr to group
    */
    write_attr(f1_gid,1,attr_dims,"integer1",H5T_NATIVE_INT,f1_attr_idata);
    write_attr(f1_gid,1,attr_dims,"float1",H5T_NATIVE_FLOAT,f1_attr_fdata);

    write_attr(f2_gid,1,attr_dims,"integer1",H5T_NATIVE_INT,f2_attr_idata);
    write_attr(f2_gid,1,attr_dims,"float1",H5T_NATIVE_FLOAT,f2_attr_fdata);

   /*----------------------------------
    * CASE2 - Same attr number, some Same attr name
    * add attr to dset
    */
    write_attr(f1_did,1,attr_dims,"integer1",H5T_NATIVE_INT,f1_attr_idata);
    write_attr(f1_did,1,attr_dims,"float2",H5T_NATIVE_FLOAT,f1_attr_fdata);

    write_attr(f2_did,1,attr_dims,"integer1",H5T_NATIVE_INT,f2_attr_idata);
    write_attr(f2_did,1,attr_dims,"float3",H5T_NATIVE_FLOAT,f2_attr_fdata);

   /*----------------------------------
    * CASE3 - Same attr number, all different attr name
    * add attr to ntype
    */
    write_attr(f1_tid,1,attr_dims,"integer1",H5T_NATIVE_INT,f1_attr_idata);
    write_attr(f1_tid,1,attr_dims,"float2",H5T_NATIVE_FLOAT,f1_attr_fdata);
    write_attr(f1_tid,1,attr_dims,"float3",H5T_NATIVE_FLOAT,f1_attr_fdata);

    write_attr(f2_tid,1,attr_dims,"integer4",H5T_NATIVE_INT,f2_attr_idata);
    write_attr(f2_tid,1,attr_dims,"float5",H5T_NATIVE_FLOAT,f2_attr_fdata);
    write_attr(f2_tid,1,attr_dims,"float6",H5T_NATIVE_FLOAT,f2_attr_fdata);

   /*----------------------------------
    * CASE4 - Different attr number, some same attr name (vs file2-g2)
    * add attr to g2
    */
    write_attr(f1_gid2,1,attr_dims,"integer1",H5T_NATIVE_INT,f1_attr_idata);
    write_attr(f1_gid2,1,attr_dims,"float2",H5T_NATIVE_FLOAT,f1_attr_fdata);
    write_attr(f1_gid2,1,attr_dims,"float3",H5T_NATIVE_FLOAT,f1_attr_fdata);

    write_attr(f2_gid2,1,attr_dims,"integer1",H5T_NATIVE_INT,f2_attr_idata);
    write_attr(f2_gid2,1,attr_dims,"float2",H5T_NATIVE_FLOAT,f2_attr_fdata);


   /*----------------------------------
    * CASE5 - Different attr number, all different attr name
    * add attr to g3
    */
    write_attr(f1_gid3,1,attr_dims,"integer10",H5T_NATIVE_INT,f1_attr_idata);
    write_attr(f1_gid3,1,attr_dims,"float11",H5T_NATIVE_FLOAT,f1_attr_fdata);
    write_attr(f1_gid3,1,attr_dims,"float12",H5T_NATIVE_FLOAT,f1_attr_fdata);

    write_attr(f2_gid3,1,attr_dims,"integer3",H5T_NATIVE_INT,f2_attr_idata);
    write_attr(f2_gid3,1,attr_dims,"float4",H5T_NATIVE_FLOAT,f2_attr_fdata);


out:
    /*-----------------------------------------------------------------------
    * Close
    *-----------------------------------------------------------------------*/
    if(fid1)
        H5Fclose(fid1);
    if(fid2)
        H5Fclose(fid2);
    if(f1_gid > 0)
        H5Gclose(f1_gid);
    if(f2_gid > 0)
        H5Gclose(f2_gid);
    if(f1_gid2 > 0)
        H5Gclose(f1_gid2);
    if(f2_gid2 > 0)
        H5Gclose(f2_gid2);
    if(f1_gid3 > 0)
        H5Gclose(f1_gid3);
    if(f2_gid3 > 0)
        H5Gclose(f2_gid3);
    if(f1_gid4 > 0)
        H5Gclose(f1_gid4);
    if(f2_gid4 > 0)
        H5Gclose(f2_gid4);
    if(f1_did > 0)
        H5Dclose(f1_did);
    if(f2_did > 0)
        H5Dclose(f2_did);
    if(f1_sid >0)
        H5Sclose(f1_sid);
    if(f2_sid >0)
        H5Sclose(f2_sid);
    if(f1_tid >0)
        H5Tclose(f1_tid);
    if(f2_tid >0)
        H5Tclose(f2_tid);

    return status;
}


/*-------------------------------------------------------------------------
* Function: test_datasets
*
* Purpose: Check all HDF5 classes
* H5T_INTEGER, H5T_FLOAT
* H5T_TIME, H5T_STRING, H5T_BITFIELD, H5T_OPAQUE, H5T_COMPOUND, H5T_REFERENCE,
* H5T_ENUM, H5T_VLEN, H5T_ARRAY
*
*-------------------------------------------------------------------------
*/
static
int test_datasets(const char *file,
                  int make_diffs /* flag to modify data buffers */)
{
    hid_t   fid;
    hid_t   did;
    hid_t   gid;
    hid_t   sid;
    hsize_t dims[1]={2};
    herr_t  status;
    int     buf[2]={1,2};

    if(make_diffs)
        memset(buf, 0, sizeof buf);

    /* Create a file  */
    if((fid = H5Fcreate(file, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT)) < 0)
        return -1;

    /* Create a 1D dataset */
    sid = H5Screate_simple(1, dims, NULL);
    did  = H5Dcreate2(fid, "dset", H5T_NATIVE_INT, sid, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    status = H5Dwrite(did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf);
    status = H5Sclose(sid);
    assert(status >= 0);

    /* Create a group */
    gid  = H5Gcreate2(fid, "g1", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);

    /*-------------------------------------------------------------------------
    * write a series of datasets on the group
    *-------------------------------------------------------------------------
    */

    write_dset_in(gid,"/dset",fid,make_diffs);

    /* close */
    status = H5Dclose(did);
    assert(status >= 0);
    status = H5Gclose(gid);
    assert(status >= 0);

    /* close file */
    status = H5Fclose(fid);
    assert(status >= 0);
    return status;
}

/*-------------------------------------------------------------------------
* Function: test_special_datasets
*
* Purpose: Check datasets with datasapce of zero dimension size.
*-------------------------------------------------------------------------
*/
static
int test_special_datasets(const char *file,
                  int make_diffs /* flag to modify data buffers */)
{
    hid_t   fid;
    hid_t   did;
    hid_t   sid0, sid;
    hsize_t dims0[SPACE1_RANK]={SPACE1_DIM1, SPACE1_DIM2};
    hsize_t dims[SPACE1_RANK]={SPACE1_DIM1, SPACE1_DIM2};
    herr_t  status;

    /* Create a file  */
    if((fid = H5Fcreate(file, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT)) < 0)
        return -1;

    /* Create a dataset with zero dimension size */
    sid0 = H5Screate_simple(SPACE1_RANK, dims0, NULL);
    did  = H5Dcreate2(fid, "dset1", H5T_NATIVE_INT, sid0, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);

    /* close dataset */
    status = H5Dclose(did);
    assert(status >= 0);

    /* close dataspace */
    status = H5Sclose(sid0);
    assert(status >= 0);

    /* Create a dataset with zero dimension size in one file but the other one
     * has a dataset with a non-zero dimension size */
    if(make_diffs) {
        dims[1] = SPACE1_DIM2 + 4;
    }

    sid = H5Screate_simple(SPACE1_RANK, dims, NULL);
    did  = H5Dcreate2(fid, "dset2", H5T_NATIVE_INT, sid, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);

    /* close dataspace */
    status = H5Sclose(sid);
    assert(status >= 0);

    /* close dataset */
    status = H5Dclose(did);
    assert(status >= 0);

    /* close file */
    status = H5Fclose(fid);
    assert(status >= 0);
    return status;
}

/*-------------------------------------------------------------------------
*
* Purpose: Create test files to compare links, one has longer name than
*          the other and short name is subset of long name.
*
* Programmer: Jonathan Kim (Feb 17, 2010)
*
*-------------------------------------------------------------------------*/
static int test_link_name(const char *fname1)
{
    hid_t   fid1=0;
    hid_t   gid1=0;
    hid_t   gid2=0;
    herr_t  status = SUCCEED;

    /*-----------------------------------------------------------------------
    * Create file(s)
    *------------------------------------------------------------------------*/
    fid1 = H5Fcreate (fname1, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    if (fid1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Groups
    *------------------------------------------------------------------------*/
    gid1 = H5Gcreate2(fid1, "group", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }
    gid2 = H5Gcreate2(fid1, "group_longname", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);

    if (gid2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Soft Links
    *------------------------------------------------------------------------*/
    status = H5Lcreate_soft("group", fid1, "link_g1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("group_longname", fid1, "link_g2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

out:
    /*-----------------------------------------------------------------------
    * Close
    *------------------------------------------------------------------------*/
    if(fid1)
        H5Fclose(fid1);
    if(gid1)
        H5Gclose(gid1);
    if(gid2)
        H5Gclose(gid2);

    return status;
}

/*-------------------------------------------------------------------------
*
* Purpose: Create test files to compare soft links in various way
*
* Programmer: Jonathan Kim (Feb 17, 2010)
*
*-------------------------------------------------------------------------*/
static int test_soft_links(const char *fname1)
{
    hid_t   fid1=0;
    hid_t   gid1=0;
    hsize_t dims2[2] = {2,4};
    int data1[4][2] = {{0,1},{2,3},{1,2},{3,4}};
    int data2[4][2] = {{0,0},{0,0},{0,0},{0,0}};
    herr_t  status = SUCCEED;

    /*-----------------------------------------------------------------------
    * Create file(s)
    *------------------------------------------------------------------------*/
    fid1 = H5Fcreate (fname1, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    if (fid1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Groups
    *------------------------------------------------------------------------*/
    gid1 = H5Gcreate2(fid1, "target_group", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Datasets
    *------------------------------------------------------------------------*/
    /* file1 */
    status = write_dset(fid1,2,dims2,"target_dset1",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    status = write_dset(fid1,2,dims2,"target_dset2",H5T_NATIVE_INT,data2);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    status = write_dset(gid1,2,dims2,"dset",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Soft Links
    *------------------------------------------------------------------------*/
    /* file 1 */
    status = H5Lcreate_soft("/target_dset1", fid1, "softlink_dset1_1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("/target_dset1", fid1, "softlink_dset1_2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("/target_dset2", fid1, "softlink_dset2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("/target_group", fid1, "softlink_group1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("/target_group", fid1, "softlink_group2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("/no_obj", fid1, "softlink_noexist", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

out:
    /*-----------------------------------------------------------------------
    * Close
    *-----------------------------------------------------------------------*/
    if(fid1)
        H5Fclose(fid1);
    if(gid1)
        H5Gclose(gid1);

    return status;
}

/*-------------------------------------------------------------------------
*
* Purpose: Create test files to compare linked soft links in various way
*
* Programmer: Jonathan Kim (Feb 17, 2010)
*
*-------------------------------------------------------------------------*/
static int test_linked_softlinks(const char *fname1)
{
    hid_t   fid1=0;
    hid_t   gid1=0;
    hid_t   gid2=0;
    hid_t   gid3=0;
    hsize_t dims2[2] = {2,4};
    int data1[4][2] = {{0,1},{2,3},{1,2},{3,4}};
    int data2[4][2] = {{0,0},{0,0},{0,0},{0,0}};
    herr_t  status = SUCCEED;

    /*-----------------------------------------------------------------------
    * Create file(s)
    *------------------------------------------------------------------------*/
    fid1 = H5Fcreate (fname1, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    if (fid1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Groups
    *------------------------------------------------------------------------*/
    gid1 = H5Gcreate2(fid1, "target_group", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    gid2 = H5Gcreate2(fid1, "target_group1", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    gid3 = H5Gcreate2(fid1, "target_group2", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid3 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Datasets
    *------------------------------------------------------------------------*/
    /* file1 */
    status = write_dset(fid1,2,dims2,"target_dset1",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    status = write_dset(fid1,2,dims2,"target_dset2",H5T_NATIVE_INT,data2);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }
    status = write_dset(gid1,2,dims2,"dset",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Soft Links (Linked)
    *------------------------------------------------------------------------*/
    /*---------
     * file 1 */
    status = H5Lcreate_soft("/target_dset1", fid1, "softlink1_to_dset1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("softlink1_to_dset1", fid1, "softlink1_to_slink1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("softlink1_to_slink1", fid1, "softlink1_to_slink2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("/target_dset2", fid1, "softlink2_to_dset2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("softlink2_to_dset2", fid1, "softlink2_to_slink1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("softlink2_to_slink1", fid1, "softlink2_to_slink2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("target_group1", fid1, "softlink3_to_group1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("softlink3_to_group1", fid1, "softlink3_to_slink1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("softlink3_to_slink1", fid1, "softlink3_to_slink2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("target_group2", fid1, "softlink4_to_group2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("softlink4_to_group2", fid1, "softlink4_to_slink1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("softlink4_to_slink1", fid1, "softlink4_to_slink2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

out:
    /*-----------------------------------------------------------------------
    * Close
    *-----------------------------------------------------------------------*/
    if(fid1)
        H5Fclose(fid1);
    if(gid1)
        H5Gclose(gid1);
    if(gid2)
        H5Gclose(gid2);
    if(gid3)
        H5Gclose(gid3);

    return status;
}

/*-------------------------------------------------------------------------
*
* Purpose: Create test files to compare external links in various way
*
* Programmer: Jonathan Kim (Feb 17, 2010)
*
*-------------------------------------------------------------------------*/
static int test_external_links(const char *fname1, const char *fname2)
{
    hid_t   fid1=0;
    hid_t   fid2=0;
    hid_t   gid1=0;
    hid_t   gid2=0;
    hsize_t dims2[2] = {2,4};
    int data1[4][2] = {{0,1},{2,3},{1,2},{3,4}};
    int data2[4][2] = {{0,0},{0,0},{0,0},{0,0}};
    herr_t  status = SUCCEED;

    /*-----------------------------------------------------------------------
    * Create file(s)
    *------------------------------------------------------------------------*/
    /* source file */
    fid1 = H5Fcreate (fname1, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    if (fid1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /* target file */
    fid2 = H5Fcreate (fname2, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    if (fid2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Groups
    *------------------------------------------------------------------------*/
    /*--------------
     * target file */
    gid1 = H5Gcreate2(fid2, "target_group", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    gid2 = H5Gcreate2(fid2, "target_group2", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname2);
        status = FAIL;
        goto out;
    }
    /*-----------------------------------------------------------------------
    * Datasets
    *------------------------------------------------------------------------*/
    /*--------------
     * target file */
    status = write_dset(fid2,2,dims2,"target_dset1",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }

    status = write_dset(gid1,2,dims2,"x_dset",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }

    status = write_dset(gid2,2,dims2,"x_dset",H5T_NATIVE_INT,data2);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * External Links
    *------------------------------------------------------------------------*/
    /*--------------*/
    /* source file */
    status = H5Lcreate_external(fname2, "/target_group/x_dset", fid1, "ext_link_dset1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_external(fname2, "/target_group2/x_dset", fid1, "ext_link_dset2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_external(fname2, "/target_group", fid1, "/ext_link_grp1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_external(fname2, "/target_group2", fid1, "/ext_link_grp2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_external(fname2, "no_obj", fid1, "ext_link_noexist1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_external("no_file.h5", "no_obj", fid1, "ext_link_noexist2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname1);
        status = FAIL;
        goto out;
    }

out:
    /*-----------------------------------------------------------------------
    * Close
    *-----------------------------------------------------------------------*/
    if(fid1)
        H5Fclose(fid1);
    if(fid2)
        H5Fclose(fid2);
    if(gid1)
        H5Gclose(gid1);
    if(gid2)
        H5Gclose(gid2);

    return status;
}

/*-------------------------------------------------------------------------
*
* Purpose: Create test files to compare external links which point to
*          soft link in various way
*
* Programmer: Jonathan Kim (Feb 17, 2010)
*
*-------------------------------------------------------------------------*/
static int test_ext2soft_links(const char *fname1, const char *fname2)
{
    hid_t   fid1=0;
    hid_t   fid2=0;
    hid_t   gid2=0;
    hsize_t dims2[2] = {2,4};
    int data1[4][2] = {{0,1},{2,3},{1,2},{3,4}};
    int data2[4][2] = {{0,0},{0,0},{0,0},{0,0}};
    herr_t  status = SUCCEED;

    /*-----------------------------------------------------------------------
    * Create file(s)
    *------------------------------------------------------------------------*/
    /* source file */
    fid1 = H5Fcreate (fname1, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    if (fid1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /* target file */
    fid2 = H5Fcreate (fname2, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    if (fid2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Groups
    *------------------------------------------------------------------------*/
    /* target file */
    gid2 = H5Gcreate2(fid2, "target_group", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Datasets
    *------------------------------------------------------------------------*/
    /*--------------
     * target file */
    status = write_dset(fid2,2,dims2,"dset1",H5T_NATIVE_INT,data2);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }

    status = write_dset(fid2,2,dims2,"dset2",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Soft Links (Linked)
    *------------------------------------------------------------------------*/
    /*---------------
     * target file */
    status = H5Lcreate_soft("/dset1", fid2, "softlink_to_dset1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("/dset2", fid2, "softlink_to_dset2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * External Links
    *------------------------------------------------------------------------*/
    /*---------------
     * source file */
    status = H5Lcreate_external(fname2, "/target_group", fid1, "ext_link", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_external(fname2, "/softlink_to_dset1", fid1, "ext_link_to_slink1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_external(fname2, "/softlink_to_dset2", fid1, "ext_link_to_slink2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname1);
        status = FAIL;
        goto out;
    }

out:
    /*-----------------------------------------------------------------------
    * Close
    *-----------------------------------------------------------------------*/
    if(fid1)
        H5Fclose(fid1);
    if(fid2)
        H5Fclose(fid2);
    if(gid2)
        H5Gclose(gid2);

    return status;
}

/*-------------------------------------------------------------------------
*
* Purpose: Create test files to compare dangling links in various way
*
* Programmer: Jonathan Kim (Feb 17, 2010)
*
*-------------------------------------------------------------------------*/
static int test_dangle_links(const char *fname1, const char *fname2)
{
    hid_t   fid1=0;
    hid_t   fid2=0;
    hsize_t dims2[2] = {2,4};
    int data1[4][2] = {{0,1},{2,3},{1,2},{3,4}};
    int data2[4][2] = {{0,0},{0,0},{0,0},{0,0}};
    herr_t  status = SUCCEED;

    /*-----------------------------------------------------------------------
    * Create file(s)
    *------------------------------------------------------------------------*/
    fid1 = H5Fcreate (fname1, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    if (fid1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    fid2 = H5Fcreate (fname2, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    if (fid2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Datasets
    *------------------------------------------------------------------------*/
    /* file1 */
    status = write_dset(fid1,2,dims2,"dset1",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    status = write_dset(fid1,2,dims2,"dset2",H5T_NATIVE_INT,data2);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    /* file2 */
    status = write_dset(fid2,2,dims2,"dset1",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }

    status = write_dset(fid2,2,dims2,"dset2",H5T_NATIVE_INT,data2);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Soft Links
    *------------------------------------------------------------------------*/
    /* file 1 */
    status = H5Lcreate_soft("no_obj", fid1, "soft_link1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("/dset1", fid1, "soft_link2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("no_obj", fid1, "soft_link3", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("no_obj1", fid1, "soft_link4", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /* file 2 */
    status = H5Lcreate_soft("no_obj", fid2, "soft_link1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("no_obj", fid2, "soft_link2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("/dset2", fid2, "soft_link3", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("no_obj2", fid2, "soft_link4", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * External Links
    *------------------------------------------------------------------------*/
    /* file1 */
    status = H5Lcreate_external(fname2, "no_obj", fid1, "ext_link1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_external(fname2, "/dset1", fid1, "ext_link2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_external(fname2, "no_obj", fid1, "ext_link3", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_external("no_file.h5", "no_obj", fid1, "ext_link4", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /* file2 */
    status = H5Lcreate_external(fname1, "no_obj", fid2, "ext_link1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_external(fname1, "no_obj", fid2, "ext_link2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_external(fname1, "/dset2", fid2, "ext_link3", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_external("no_file.h5", "no_obj", fid2, "ext_link4", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname2);
        status = FAIL;
        goto out;
    }

out:
    /*-----------------------------------------------------------------------
    * Close
    *-----------------------------------------------------------------------*/
    if(fid1)
        H5Fclose(fid1);
    if(fid2)
        H5Fclose(fid2);

    return status;
}

/*-------------------------------------------------------------------------
*
* Purpose: For testing comparing group member objects recursively
*
* Programmer: Jonathan Kim (Aug 19, 2010)
*
*-------------------------------------------------------------------------*/
static int test_group_recurse(const char *fname1, const char *fname2)
{
    hid_t   fid1=0;
    hid_t   fid2=0;
    hid_t   gid1_f1=0, gid2_f1=0, gid3_f1=0, gid10_f1=0;
    hid_t   gid1_f2=0, gid2_f2=0, gid3_f2=0, gid11_f2=0;
    hsize_t dims2[2] = {2,4};
    int data1[4][2] = {{0,1},{0,1},{1,0},{1,0}};
    int data2[4][2] = {{0,2},{0,2},{2,0},{2,0}};
    int data3[4][2] = {{0,3},{0,3},{3,0},{3,0}};
    herr_t  status = SUCCEED;

    /*-----------------------------------------------------------------------
    * Create file(s)
    *------------------------------------------------------------------------*/
    fid1 = H5Fcreate (fname1, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    if (fid1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    fid2 = H5Fcreate (fname2, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    if (fid2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Groups
    *------------------------------------------------------------------------*/
    /* file1 */
    gid1_f1 = H5Gcreate2(fid1, "/grp1", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid1_f1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    gid2_f1 = H5Gcreate2(fid1, "/grp1/grp2", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid2_f1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    gid3_f1 = H5Gcreate2(fid1, "/grp1/grp2/grp3", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid3_f1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    gid10_f1 = H5Gcreate2(fid1, "/grp10", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid10_f1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /* file2 */
    gid1_f2 = H5Gcreate2(fid2, "/grp1", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid1_f2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    gid2_f2 = H5Gcreate2(fid2, "/grp1/grp2", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid2_f2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    gid3_f2 = H5Gcreate2(fid2, "/grp1/grp2/grp3", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid3_f2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    gid11_f2 = H5Gcreate2(fid2, "/grp11", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid11_f2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Datasets under root
    *------------------------------------------------------------------------*/
    /* file1 */
    status = write_dset(fid1,2,dims2,"dset1",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    status = write_dset(fid1,2,dims2,"dset2",H5T_NATIVE_INT,data2);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    status = write_dset(fid1,2,dims2,"dset3",H5T_NATIVE_INT,data3);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    /* file2 */
    status = write_dset(fid2,2,dims2,"dset1",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }

    status = write_dset(fid2,2,dims2,"dset2",H5T_NATIVE_INT,data2);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }

    status = write_dset(fid2,2,dims2,"dset3",H5T_NATIVE_INT,data3);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Datasets under group
    *------------------------------------------------------------------------*/
    /* file1 */
    status = write_dset(gid1_f1,2,dims2,"dset1",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    status = write_dset(gid2_f1,2,dims2,"dset1",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }
    status = write_dset(gid2_f1,2,dims2,"dset2",H5T_NATIVE_INT,data2);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    status = write_dset(gid3_f1,2,dims2,"dset1",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }
    status = write_dset(gid3_f1,2,dims2,"dset2",H5T_NATIVE_INT,data2);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    status = write_dset(gid3_f1,2,dims2,"dset3",H5T_NATIVE_INT,data3);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    status = write_dset(gid10_f1,2,dims2,"dset4",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    status = write_dset(gid10_f1,2,dims2,"dset5",H5T_NATIVE_INT,data3);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    /* file2 */
    status = write_dset(gid1_f2,2,dims2,"dset1",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }

    status = write_dset(gid2_f2,2,dims2,"dset1",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }
    status = write_dset(gid2_f2,2,dims2,"dset2",H5T_NATIVE_INT,data2);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }

    status = write_dset(gid3_f2,2,dims2,"dset1",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }
    status = write_dset(gid3_f2,2,dims2,"dset2",H5T_NATIVE_INT,data2);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }

    status = write_dset(gid3_f2,2,dims2,"dset3",H5T_NATIVE_INT,data3);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }

    status = write_dset(gid11_f2,2,dims2,"dset4",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }

    status = write_dset(gid11_f2,2,dims2,"dset5",H5T_NATIVE_INT,data2);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }


    /*-----------------------------------------------------------------------
    * Soft Links
    *------------------------------------------------------------------------*/
    /* file 1 */
    status = H5Lcreate_soft("/grp1", fid1, "slink_grp1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("/grp1/grp2", fid1, "slink_grp2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("/grp1/grp2/grp3", fid1, "slink_grp3", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("/grp10", fid1, "slink_grp10", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /* file 2 */
    status = H5Lcreate_soft("/grp1", fid2, "slink_grp1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("/grp1/grp2", fid2, "slink_grp2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("/grp1/grp2/grp3", fid2, "slink_grp3", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_soft("/grp11", fid2, "slink_grp11", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * External Links
    *------------------------------------------------------------------------*/
    /* file1 */
    status = H5Lcreate_external(fname2, "/grp1", fid1, "elink_grp1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_external(fname2, "/grp1/grp2", fid1, "elink_grp2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_external(fname2, "/grp1/grp2/grp3", fid1, "elink_grp3", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /* file2 */
    status = H5Lcreate_external(fname1, "/grp1", fid2, "elink_grp1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_external(fname1, "/grp1/grp2", fid2, "elink_grp2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    status = H5Lcreate_external(fname1, "/grp1/grp2/grp3", fid2, "elink_grp3", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    /*------------------------------
     * external circle route test
     * file1/grp11 <-> file2/grp10  via elink_grp_circle link
     */
    /* file1 */
    status = H5Lcreate_external(fname2, "/grp11", gid10_f1, "elink_grp_circle", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname1);
        status = FAIL;
        goto out;
    }
    /* file2 */
    status = H5Lcreate_external(fname1, "/grp10", gid11_f2, "elink_grp_circle", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", fname2);
        status = FAIL;
        goto out;
    }


out:
    /*-----------------------------------------------------------------------
    * Close
    *-----------------------------------------------------------------------*/
    if(fid1)
        H5Fclose(fid1);
    if(fid2)
        H5Fclose(fid2);
    if(gid1_f1)
        H5Gclose(gid1_f1);
    if(gid2_f1)
        H5Gclose(gid2_f1);
    if(gid3_f1)
        H5Gclose(gid3_f1);
    if(gid1_f2)
        H5Gclose(gid1_f2);
    if(gid2_f2)
        H5Gclose(gid2_f2);
    if(gid3_f2)
        H5Gclose(gid3_f2);

    return status;
}

/*-------------------------------------------------------------------------
*
* Purpose:
*   For testing comparing group member objects recursively via multiple
*   linked external links
*
* Programmer: Jonathan Kim (Sep 16, 2010)
*
*-------------------------------------------------------------------------*/
#define GRP_R_DSETNAME1 "dset1"
#define GRP_R_DSETNAME2 "dset2"
static int test_group_recurse2(void)
{
    hid_t       fileid1;
    hid_t       grp1=0, grp2;
    hid_t       grp3=0;
    hid_t       grp4=0;
    hid_t       dset1, dset2;
    hid_t       datatype, dataspace;   /* handles */
    hid_t       fileid2;
    hid_t       fileid3;
    hid_t       fileid4;
    hsize_t     dimsf[2];              /* dataset dimensions */
    herr_t      status=0;
    int data1[4][2] = {{0,0},{1,1},{2,2},{3,3}};
    int data2[4][2] = {{0,0},{0,1},{0,2},{3,3}};

   /*-----------------------------------------------------------------------
    * FILE 1
    *------------------------------------------------------------------------*/
    /*
     * Create a new file using H5F_ACC_TRUNC access,
     * default file creation properties, and default file
     * access properties.
     */
    fileid1 = H5Fcreate(GRP_RECURSE1_EXT, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);

   /*-----------------------------------------------------------------------
    * Groups
    *------------------------------------------------------------------------*/
    grp1 = H5Gcreate2(fileid1, "/g1", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (grp1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", GRP_RECURSE1_EXT);
        status = FAIL;
        goto out;
    }

    grp2 = H5Gcreate2(grp1, "g2", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (grp2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", GRP_RECURSE1_EXT);
        status = FAIL;
        goto out;
    }

    grp3 = H5Gcreate2(grp2, "g3", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (grp3 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", GRP_RECURSE1_EXT);
        status = FAIL;
        goto out;
    }

    grp4 = H5Gcreate2(grp3, "g4", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (grp4 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", GRP_RECURSE1_EXT);
        status = FAIL;
        goto out;
    }


   /*-----------------------------------------------------------------------
    * Datasets
    *------------------------------------------------------------------------*/
    /*
     * Describe the size of the array and create the data space for fixed
     * size dataset.
     */
    dimsf[0] = 4;
    dimsf[1] = 2;
    dataspace = H5Screate_simple(2, dimsf, NULL);

    /*
     * Define datatype for the data in the file.
     * We will store little endian INT numbers.
     */
    datatype = H5Tcopy(H5T_NATIVE_INT);
    status = H5Tset_order(datatype, H5T_ORDER_LE);

    /*---------------
     * dset1
     */
    /*
     * Create a new dataset within the file using defined dataspace and
     * datatype and default dataset creation properties.
     */
    dset1 = H5Dcreate2(fileid1, GRP_R_DSETNAME1, datatype, dataspace,
      H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);

    /*
     * Write the data to the dataset using default transfer properties.
     */
    status = H5Dwrite(dset1, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, data1);
    H5Dclose(dset1);

    /*---------------
     * dset1
     */
    /*
     * Create a new dataset within the file using defined dataspace and
     * datatype and default dataset creation properties.
     */
    dset1 = H5Dcreate2(grp3, GRP_R_DSETNAME1, datatype, dataspace,
      H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);

    /*
     * Write the data to the dataset using default transfer properties.
     */
    status = H5Dwrite(dset1, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, data1);

    /*---------------
     * dset2
     */
    /*
     * Create a new dataset within the fileid1 using defined dataspace and
     * datatype and default dataset creation properties.
     */
    dset2 = H5Dcreate2(grp4, GRP_R_DSETNAME2, datatype, dataspace,
      H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);

    /*
     * Write the data to the dataset using default transfer properties.
     */
    status = H5Dwrite(dset2, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, data2);

   /*-----------------------------------------------------------------------
    * Soft links
    *------------------------------------------------------------------------*/
    /*
     * under  '/' root
     */
    /* link to dset1 */
    status = H5Lcreate_soft(GRP_R_DSETNAME1, fileid1, "soft_dset1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", GRP_RECURSE1_EXT);
        status = FAIL;
        goto out;
    }

    H5Dclose(dset1);
    H5Dclose(dset2);
    H5Gclose(grp1);
    H5Gclose(grp2);
    H5Gclose(grp3);
    H5Gclose(grp4);

   /*-----------------------------------------------------------------------
    * FILE 2-3
    *------------------------------------------------------------------------*/

    /* crate target file */
    fileid4 = H5Fcreate(GRP_RECURSE2_EXT3, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);

   /*-----------------------------------------------
    * Groups
    */
    grp4 = H5Gcreate2(fileid4, "/g4", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (grp4 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", GRP_RECURSE2_EXT3);
        status = FAIL;
        goto out;
    }

    /*---------------
     * dset2
     */
    /*
     * Create a new dataset within the fileid1 using defined dataspace and
     * datatype and default dataset creation properties.
     */
    dset2 = H5Dcreate2(grp4, GRP_R_DSETNAME2, datatype, dataspace,
      H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);

    /*
     * Write the data to the dataset using default transfer properties.
     */
    status = H5Dwrite(dset2, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, data2);

    H5Gclose(grp4);
    H5Dclose(dset2);


   /*-----------------------------------------------------------------------
    * FILE 2-2
    *------------------------------------------------------------------------*/

    /* crate target file */
    fileid3 = H5Fcreate(GRP_RECURSE2_EXT2, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);

   /*-----------------------------------------------
    * Groups
    */
    grp2 = H5Gcreate2(fileid3, "g2", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (grp2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", GRP_RECURSE2_EXT2);
        status = FAIL;
        goto out;
    }

    grp3 = H5Gcreate2(grp2, "g3", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (grp3 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", GRP_RECURSE2_EXT2);
        status = FAIL;
        goto out;
    }

    /*---------------
     * dset1
     */
    /*
     * Create a new dataset within the fileid1 using defined dataspace and
     * datatype and default dataset creation properties.
     */
    dset1 = H5Dcreate2(grp3, GRP_R_DSETNAME1, datatype, dataspace,
      H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);

    /*
     * Write the data to the dataset using default transfer properties.
     */
    status = H5Dwrite(dset1, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, data1);

   /*-----------------------------------------------
    * extlink to  $GRP_RECURSE2_EXT3/g4
    */
    status = H5Lcreate_external(GRP_RECURSE2_EXT3, "/g4", fileid3, "/g2/g3/g4", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", GRP_RECURSE2_EXT2);
        status = FAIL;
        goto out;
    }

    H5Dclose(dset1);
    H5Gclose(grp2);
    H5Gclose(grp3);

   /*-----------------------------------------------------------------------
    * FILE 2-1
    *------------------------------------------------------------------------*/

    /* crate target file */
    fileid2 = H5Fcreate(GRP_RECURSE2_EXT1, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);

   /*-----------------------------------------------
    * Groups
    */
    grp1 = H5Gcreate2(fileid2, "g1", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (grp1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", GRP_RECURSE1_EXT);
        status = FAIL;
        goto out;
    }

    /*---------------
     * dset1
     */
    dset1 = H5Dcreate2(fileid2, GRP_R_DSETNAME1, datatype, dataspace,
      H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);

    /*
     * Write the data to the dataset using default transfer properties.
     */
    status = H5Dwrite(dset1, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, data1);

   /*-----------------------------------------------------------------------
    * Soft links
    *------------------------------------------------------------------------*/
    /*
     * under  '/' root
     */
    /* link to dset1 */
    status = H5Lcreate_soft(GRP_R_DSETNAME1, fileid2, "soft_dset1", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", GRP_RECURSE2_EXT1);
        status = FAIL;
        goto out;
    }

   /*-----------------------------------------------
    * extlink to  $GRP_RECURSE2_EXT2/g2
    */
    status = H5Lcreate_external(GRP_RECURSE2_EXT2, "/g2", fileid2, "/g1/g2", H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Lcreate_external failed.\n", GRP_RECURSE2_EXT1);
        status = FAIL;
        goto out;
    }

    H5Gclose(grp1);
    H5Dclose(dset1);

out:
    /*
     * Close/release resources.
     */
    H5Sclose(dataspace);
    H5Tclose(datatype);
    H5Fclose(fileid1);
    H5Fclose(fileid2);
    H5Fclose(fileid3);
    H5Fclose(fileid4);

    return status;
}


/*-------------------------------------------------------------------------
*
* Purpose: Create test files for excluding obj.
*          Same structure, same obj names
* Test : exclude obj with different value to verify the rest are same
*
* Programmer: Jonathan Kim (July, 21, 2010)
*
*-------------------------------------------------------------------------*/
static int test_exclude_obj1(const char *fname1, const char *fname2)
{
    hid_t   fid1=0;
    hid_t   fid2=0;
    hid_t   gid1=0;
    hid_t   gid2=0;
    hsize_t dims2[2] = {2,4};
    int data1[4][2] = {{0,0},{0,0},{0,0},{0,0}};
    int data2[4][2] = {{0,1},{2,3},{1,2},{3,4}};
    herr_t  status = SUCCEED;

    /*-----------------------------------------------------------------------
    * Create file(s)
    *------------------------------------------------------------------------*/
    fid1 = H5Fcreate (fname1, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    if (fid1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    fid2 = H5Fcreate (fname2, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    if (fid2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname2);
        status = FAIL;
        goto out;
    }


   /*-----------------------------------------------------------------------
    * Group
    *------------------------------------------------------------------------*/
    /* file1 */
    gid1 = H5Gcreate2(fid1, "group1", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /* file2 */
    gid2 = H5Gcreate2(fid2, "group1", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);

    if (gid2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname2);
        status = FAIL;
        goto out;
    }


    /*-----------------------------------------------------------------------
    * Datasets
    *------------------------------------------------------------------------*/
    /* file1 */
    status = write_dset(fid1,2,dims2,"dset1",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    status = write_dset(gid1,2,dims2,"dset2",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    status = write_dset(gid1,2,dims2,"dset3",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }


    /* file2 */
    status = write_dset(fid2,2,dims2,"dset1",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }

    status = write_dset(gid2,2,dims2,"dset2",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }

    status = write_dset(gid2,2,dims2,"dset3",H5T_NATIVE_INT,data2);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }


out:
    /*-----------------------------------------------------------------------
    * Close
    *-----------------------------------------------------------------------*/
    if(fid1)
        H5Fclose(fid1);
    if(fid2)
        H5Fclose(fid2);
    if(gid1)
        H5Gclose(gid1);
    if(gid2)
        H5Gclose(gid2);

    return status;
}

/*-------------------------------------------------------------------------
*
* Purpose: Create test files for excluding obj.
*          different structure and name
* Test : exclude different objs to verify the rest are same
*
* Programmer: Jonathan Kim (July, 21, 2010)
*
*-------------------------------------------------------------------------*/
static int test_exclude_obj2(const char *fname1, const char *fname2)
{
    hid_t   fid1=0;
    hid_t   fid2=0;
    hid_t   gid1=0;
    hid_t   gid2=0;
    hid_t   gid3=0;
    hsize_t dims2[2] = {2,4};
    int data1[4][2] = {{0,0},{0,0},{0,0},{0,0}};
    int data2[4][2] = {{0,1},{2,3},{1,2},{3,4}};
    herr_t  status = SUCCEED;

    /*-----------------------------------------------------------------------
    * Create file(s)
    *------------------------------------------------------------------------*/
    fid1 = H5Fcreate (fname1, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    if (fid1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    fid2 = H5Fcreate (fname2, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    if (fid2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname2);
        status = FAIL;
        goto out;
    }


   /*-----------------------------------------------------------------------
    * Group
    *------------------------------------------------------------------------*/
    /* file1 */
    gid1 = H5Gcreate2(fid1, "group10", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /* file2 */
    gid2 = H5Gcreate2(fid2, "group10", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);

    if (gid2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    /* subset name from group10 */
    gid3 = H5Gcreate2(fid2, "group1", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);

    if (gid3 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname2);
        status = FAIL;
        goto out;
    }


    /*-----------------------------------------------------------------------
    * Datasets
    *------------------------------------------------------------------------*/
    /* file1 */
    status = write_dset(fid1,2,dims2,"dset10",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    status = write_dset(fid1,2,dims2,"dset1",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    status = write_dset(gid1,2,dims2,"dset2",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }


    /* file2 */
    status = write_dset(fid2,2,dims2,"dset10",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }

    status = write_dset(gid2,2,dims2,"dset2",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }

    status = write_dset(gid3,2,dims2,"dset3",H5T_NATIVE_INT,data2);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }


out:
    /*-----------------------------------------------------------------------
    * Close
    *-----------------------------------------------------------------------*/
    if(fid1)
        H5Fclose(fid1);
    if(fid2)
        H5Fclose(fid2);
    if(gid1)
        H5Gclose(gid1);
    if(gid2)
        H5Gclose(gid2);
    if(gid3)
        H5Gclose(gid3);

    return status;
}

/*-------------------------------------------------------------------------
*
* Purpose: Create test files for excluding obj.
*          Only one file contains unique objs. Common objs are same.
* Test : exclude unique objs to verify the rest are same
*  - HDFFV-7837
*
* Programmer: Jonathan Kim (Mar, 19, 2012)
*
*-------------------------------------------------------------------------*/
static int test_exclude_obj3(const char *fname1, const char *fname2)
{
    hid_t   fid1=0;
    hid_t   fid2=0;
    hid_t   gid1=0;
    hsize_t dims2[2] = {2,4};
    int data1[4][2] = {{0,0},{0,0},{0,0},{0,0}};
    herr_t  status = SUCCEED;

    /*-----------------------------------------------------------------------
    * Create file(s)
    *------------------------------------------------------------------------*/
    fid1 = H5Fcreate (fname1, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    if (fid1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    fid2 = H5Fcreate (fname2, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    if (fid2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname2);
        status = FAIL;
        goto out;
    }


   /*-----------------------------------------------------------------------
    * Group
    *------------------------------------------------------------------------*/
    /* file1 */
    gid1 = H5Gcreate2(fid1, "group1", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Datasets
    *------------------------------------------------------------------------*/
    /* file1 */
    status = write_dset(fid1,2,dims2,"dset1",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    status = write_dset(gid1,2,dims2,"dset",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        status = FAIL;
        goto out;
    }

    /* file2 */
    status = write_dset(fid2,2,dims2,"dset1",H5T_NATIVE_INT,data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        status = FAIL;
        goto out;
    }

out:
    /*-----------------------------------------------------------------------
    * Close
    *-----------------------------------------------------------------------*/
    if(fid1)
        H5Fclose(fid1);
    if(fid2)
        H5Fclose(fid2);
    if(gid1)
        H5Gclose(gid1);

    return status;
}

/*-------------------------------------------------------------------------
*
* Purpose: Create test files for multiple variable length string/string array
*          along with fixed length string/string array types in
*          a compound type dataset.
*
* Programmer: Jonathan Kim (Oct, 26, 2010)
*
*-------------------------------------------------------------------------*/
#define STR_RANK 1
#define VLEN_STR_DIM 1
#define FIXLEN_STR_SIZE 21
#define FIXLEN_STR_DIM 1
#define VLEN_STR_ARRY_DIM 3
#define FIXLEN_STR_ARRY_DIM 3
#define FIXLEN_STR_ARRY_SIZE 30
#define COMP_RANK 1
#define COMP_DIM 1
static int test_comp_vlen_strings(const char *fname1, const char *grp_name, int is_file_new)
{
    int i;

    hid_t    fid1;      /* file id */
    hid_t    gid;

    /* compound1 datatype */
    typedef struct comp1_t
    {
        char   *str_vlen;  /* vlen string */
        char   *str_vlen_repeat;  /* vlen string */
        char   str_fixlen[FIXLEN_STR_SIZE];  /* fixed len string */
        char   str_fixlen_repeat[FIXLEN_STR_SIZE];  /* fixed len string */
        char   *str_array_vlen[VLEN_STR_ARRY_DIM];  /* vlen string array */
        char   *str_vlen_array_again[VLEN_STR_ARRY_DIM];  /* vlen string array */
        char   str_array_fixlen[FIXLEN_STR_ARRY_DIM][FIXLEN_STR_ARRY_SIZE];  /* fixed len string array */
        char   str_fixlen_array_again[FIXLEN_STR_ARRY_DIM][FIXLEN_STR_ARRY_SIZE];  /* fixed len string array */
    } comp1_t;

    /* compound2 datatype */
    typedef struct comp2_t
    {
        char   *str_vlen;  /* vlen string */
        char   str_fixlen[FIXLEN_STR_SIZE];  /* fixed len string */
        char   *str_vlen_repeat;  /* vlen string */
        char   str_fixlen_repeat[FIXLEN_STR_SIZE];  /* fixed len string */
        char   *str_array_vlen[VLEN_STR_ARRY_DIM];  /* vlen string array */
        char   str_array_fixlen[FIXLEN_STR_ARRY_DIM][FIXLEN_STR_ARRY_SIZE];  /* fixed len string array */
        char   *str_vlen_array_again[VLEN_STR_ARRY_DIM];  /* vlen string array */
        char   str_fixlen_array_again[FIXLEN_STR_ARRY_DIM][FIXLEN_STR_ARRY_SIZE];  /* fixed len string array */
    } comp2_t;

    /* compound3 datatype */
    typedef struct comp3_t
    {
        char   str_fixlen[FIXLEN_STR_SIZE];  /* fixed len string */
        char   str_fixlen_repeat[FIXLEN_STR_SIZE];  /* fixed len string */
        char   *str_vlen;  /* vlen string */
        char   *str_vlen_repeat;  /* vlen string */
        char   str_array_fixlen[FIXLEN_STR_ARRY_DIM][FIXLEN_STR_ARRY_SIZE];  /* fixed len string array */
        char   str_fixlen_array_again[FIXLEN_STR_ARRY_DIM][FIXLEN_STR_ARRY_SIZE];  /* fixed len string array */
        char   *str_array_vlen[VLEN_STR_ARRY_DIM];  /* vlen string array */
        char   *str_vlen_array_again[VLEN_STR_ARRY_DIM];  /* vlen string array */
    } comp3_t;

    /* compound4 datatype */
    typedef struct comp4_t
    {
        char   str_fixlen[FIXLEN_STR_SIZE];  /* fixed len string */
        char   *str_vlen;  /* vlen string */
        char   str_fixlen_repeat[FIXLEN_STR_SIZE];  /* fixed len string */
        char   *str_vlen_repeat;  /* vlen string */
        char   str_array_fixlen[FIXLEN_STR_ARRY_DIM][FIXLEN_STR_ARRY_SIZE];  /* fixed len string array */
        char   *str_array_vlen[VLEN_STR_ARRY_DIM];  /* vlen string array */
        char   str_fixlen_array_again[FIXLEN_STR_ARRY_DIM][FIXLEN_STR_ARRY_SIZE];  /* fixed len string array */
        char   *str_vlen_array_again[VLEN_STR_ARRY_DIM];  /* vlen string array */
    } comp4_t;

    /* compound5 datatype */
    typedef struct comp5_t
    {
        char   *str_array_vlen[VLEN_STR_ARRY_DIM];  /* vlen string array */
        char   *str_vlen_array_again[VLEN_STR_ARRY_DIM];  /* vlen string array */
        char   str_array_fixlen[FIXLEN_STR_ARRY_DIM][FIXLEN_STR_ARRY_SIZE];  /* fixed len string array */
        char   str_fixlen_array_again[FIXLEN_STR_ARRY_DIM][FIXLEN_STR_ARRY_SIZE];  /* fixed len string array */
        char   *str_vlen;  /* vlen string */
        char   *str_vlen_repeat;  /* vlen string */
        char   str_fixlen[FIXLEN_STR_SIZE];  /* fixed len string */
        char   str_fixlen_repeat[FIXLEN_STR_SIZE];  /* fixed len string */
    } comp5_t;

    /* compound6 datatype */
    typedef struct comp6_t
    {
        char   *str_array_vlen[VLEN_STR_ARRY_DIM];  /* vlen string array */
        char   str_array_fixlen[FIXLEN_STR_ARRY_DIM][FIXLEN_STR_ARRY_SIZE];  /* fixed len string array */
        char   *str_vlen_array_again[VLEN_STR_ARRY_DIM];  /* vlen string array */
        char   str_fixlen_array_again[FIXLEN_STR_ARRY_DIM][FIXLEN_STR_ARRY_SIZE];  /* fixed len string array */
        char   *str_vlen;  /* vlen string */
        char   str_fixlen[FIXLEN_STR_SIZE];  /* fixed len string */
        char   *str_vlen_repeat;  /* vlen string */
        char   str_fixlen_repeat[FIXLEN_STR_SIZE];  /* fixed len string */
    } comp6_t;

    /* compound7 datatype */
    typedef struct comp7_t
    {
        char   str_array_fixlen[FIXLEN_STR_ARRY_DIM][FIXLEN_STR_ARRY_SIZE];  /* fixed len string array */
        char   str_fixlen_array_again[FIXLEN_STR_ARRY_DIM][FIXLEN_STR_ARRY_SIZE];  /* fixed len string array */
        char   *str_array_vlen[VLEN_STR_ARRY_DIM];  /* vlen string array */
        char   *str_vlen_array_again[VLEN_STR_ARRY_DIM];  /* vlen string array */
        char   str_fixlen[FIXLEN_STR_SIZE];  /* fixed len string */
        char   str_fixlen_repeat[FIXLEN_STR_SIZE];  /* fixed len string */
        char   *str_vlen;  /* vlen string */
        char   *str_vlen_repeat;  /* vlen string */
    } comp7_t;

    /* compound8 datatype */
    typedef struct comp8_t
    {
        char   str_array_fixlen[FIXLEN_STR_ARRY_DIM][FIXLEN_STR_ARRY_SIZE];  /* fixed len string array */
        char   *str_array_vlen[VLEN_STR_ARRY_DIM];  /* vlen string array */
        char   str_fixlen_array_again[FIXLEN_STR_ARRY_DIM][FIXLEN_STR_ARRY_SIZE];  /* fixed len string array */
        char   *str_vlen_array_again[VLEN_STR_ARRY_DIM];  /* vlen string array */
        char   str_fixlen[FIXLEN_STR_SIZE];  /* fixed len string */
        char   *str_vlen;  /* vlen string */
        char   str_fixlen_repeat[FIXLEN_STR_SIZE];  /* fixed len string */
        char   *str_vlen_repeat;  /* vlen string */
    } comp8_t;

    /* compound9 datatype */
    typedef struct comp9_t
    {
        char   str_array_fixlen[FIXLEN_STR_ARRY_DIM][FIXLEN_STR_ARRY_SIZE];  /* fixed len string array */
        char   str_fixlen_array_again[FIXLEN_STR_ARRY_DIM][FIXLEN_STR_ARRY_SIZE];  /* fixed len string array */
        char   *str_array_vlen[VLEN_STR_ARRY_DIM];  /* vlen string array */
        char   *str_vlen_array_again[VLEN_STR_ARRY_DIM];  /* vlen string array */
        char   str_fixlen[FIXLEN_STR_SIZE];  /* fixed len string */
        int    int_data1;
        hobj_ref_t objref1;                  /* reference */
        char   str_fixlen_repeat[FIXLEN_STR_SIZE];  /* fixed len string */
        hobj_ref_t objref2;                  /* reference */
        char   *str_vlen;  /* vlen string */
        int    int_data2;
        char   *str_vlen_repeat;  /* vlen string */
        hobj_ref_t objref3;                  /* reference */
        int    int_data3;
    } comp9_t;

    /* vlen string */
    hid_t    sid_vlen_str=0;      /* dataspace ID */
    hid_t    tid_vlen_str=0;      /* datatype ID */
    const char vlen_str_buf[]= {
        "Variable length string"
        };
    hsize_t dims_vlen_str[]  = {VLEN_STR_DIM};

    /* fixlen string */
    hid_t    sid_fixlen_str=0;      /* dataspace ID */
    hid_t    tid_fixlen_str=0;      /* datatype ID */
    const char fixlen_str_buf[FIXLEN_STR_SIZE]= {
        "Fixed length string"
        };
    hsize_t dims_fixlen_str[]  = {FIXLEN_STR_DIM};

    /* vlen string array */
    hid_t    sid_vlen_str_array=0;      /* dataspace ID */
    hid_t    tid_vlen_str_array_pre=0;      /* datatype ID */
    hid_t    tid_vlen_str_array=0; /* datatype ID */
    const char *vlen_str_array_buf[VLEN_STR_ARRY_DIM]= {
        "1 - Variable length string Array",
        "2 - Testing variable length string array in compound type",
        "3 - Four score and seven\n years ago our forefathers brought forth on this continent a new nation,"
        };
    hsize_t dims_vlen_str_array[]  = {VLEN_STR_ARRY_DIM};

    /* fixlen string array  */
    hid_t    sid_fixlen_str_array=0;      /* dataspace ID */
    hid_t    tid_fixlen_str_array_pre=0;      /* datatype ID */
    hid_t    tid_fixlen_str_array=0; /* datatype ID */
    const char *fixlen_str_array_buf[FIXLEN_STR_ARRY_DIM]= {
        "1 - Fixed length string Array",
        "2 - Fixed length string Array",
        "3 - Fixed length string Array"
        };
    hsize_t dims_fixlen_str_array[]  = {FIXLEN_STR_ARRY_DIM};

    /*------------------------------------------
     * compound dataset
     *------------------------------------------*/
    hid_t    sid_comp=0;      /* dataspace ID */
    hid_t    tid1_comp=0;      /* datatype ID */
    hid_t    tid2_comp=0;      /* datatype ID */
    hid_t    tid3_comp=0;      /* datatype ID */
    hid_t    tid4_comp=0;      /* datatype ID */
    hid_t    tid5_comp=0;      /* datatype ID */
    hid_t    tid6_comp=0;      /* datatype ID */
    hid_t    tid7_comp=0;      /* datatype ID */
    hid_t    tid8_comp=0;      /* datatype ID */
    hid_t    tid9_comp=0;      /* datatype ID */
    hid_t    did_comp=0;      /* dataset ID */
    hsize_t dims_comp[]  = {COMP_DIM};
    herr_t  status = SUCCEED;

    /* make compound strings data */
    comp1_t comp1_buf;
    comp2_t comp2_buf;
    comp3_t comp3_buf;
    comp4_t comp4_buf;
    comp5_t comp5_buf;
    comp6_t comp6_buf;
    comp7_t comp7_buf;
    comp8_t comp8_buf;
    comp9_t comp9_buf;

    /* copy vlen string data to compound buffers */
    comp1_buf.str_vlen = comp1_buf.str_vlen_repeat = vlen_str_buf;
    comp2_buf.str_vlen = comp2_buf.str_vlen_repeat = vlen_str_buf;
    comp3_buf.str_vlen = comp3_buf.str_vlen_repeat = vlen_str_buf;
    comp4_buf.str_vlen = comp4_buf.str_vlen_repeat = vlen_str_buf;
    comp5_buf.str_vlen = comp5_buf.str_vlen_repeat = vlen_str_buf;
    comp6_buf.str_vlen = comp6_buf.str_vlen_repeat = vlen_str_buf;
    comp7_buf.str_vlen = comp7_buf.str_vlen_repeat = vlen_str_buf;
    comp8_buf.str_vlen = comp8_buf.str_vlen_repeat = vlen_str_buf;
    comp9_buf.str_vlen = comp9_buf.str_vlen_repeat = vlen_str_buf;

    /* copy fixlen string data to compound buffers */
    HDstrcpy(comp1_buf.str_fixlen, fixlen_str_buf);
    HDstrcpy(comp1_buf.str_fixlen_repeat, fixlen_str_buf);

    HDstrcpy(comp2_buf.str_fixlen, fixlen_str_buf);
    HDstrcpy(comp2_buf.str_fixlen_repeat, fixlen_str_buf);

    HDstrcpy(comp3_buf.str_fixlen, fixlen_str_buf);
    HDstrcpy(comp3_buf.str_fixlen_repeat, fixlen_str_buf);

    HDstrcpy(comp3_buf.str_fixlen, fixlen_str_buf);
    HDstrcpy(comp3_buf.str_fixlen_repeat, fixlen_str_buf);

    HDstrcpy(comp4_buf.str_fixlen, fixlen_str_buf);
    HDstrcpy(comp4_buf.str_fixlen_repeat, fixlen_str_buf);

    HDstrcpy(comp5_buf.str_fixlen, fixlen_str_buf);
    HDstrcpy(comp5_buf.str_fixlen_repeat, fixlen_str_buf);

    HDstrcpy(comp6_buf.str_fixlen, fixlen_str_buf);
    HDstrcpy(comp6_buf.str_fixlen_repeat, fixlen_str_buf);

    HDstrcpy(comp7_buf.str_fixlen, fixlen_str_buf);
    HDstrcpy(comp7_buf.str_fixlen_repeat, fixlen_str_buf);

    HDstrcpy(comp8_buf.str_fixlen, fixlen_str_buf);
    HDstrcpy(comp8_buf.str_fixlen_repeat, fixlen_str_buf);

    HDstrcpy(comp9_buf.str_fixlen, fixlen_str_buf);
    HDstrcpy(comp9_buf.str_fixlen_repeat, fixlen_str_buf);

    /* copy vlen string array data to compound buffers */
    for (i=0; i < VLEN_STR_ARRY_DIM; i++)
    {
        comp1_buf.str_array_vlen[i] = comp1_buf.str_vlen_array_again[i] = vlen_str_array_buf[i];
        comp2_buf.str_array_vlen[i] = comp2_buf.str_vlen_array_again[i] = vlen_str_array_buf[i];
        comp3_buf.str_array_vlen[i] = comp3_buf.str_vlen_array_again[i] = vlen_str_array_buf[i];
        comp4_buf.str_array_vlen[i] = comp4_buf.str_vlen_array_again[i] = vlen_str_array_buf[i];
        comp5_buf.str_array_vlen[i] = comp5_buf.str_vlen_array_again[i] = vlen_str_array_buf[i];
        comp6_buf.str_array_vlen[i] = comp6_buf.str_vlen_array_again[i] = vlen_str_array_buf[i];
        comp7_buf.str_array_vlen[i] = comp7_buf.str_vlen_array_again[i] = vlen_str_array_buf[i];
        comp8_buf.str_array_vlen[i] = comp8_buf.str_vlen_array_again[i] = vlen_str_array_buf[i];
        comp9_buf.str_array_vlen[i] = comp9_buf.str_vlen_array_again[i] = vlen_str_array_buf[i];

    }

    /* copy fixlen string attay data to compound buffers */
    for (i=0; i < FIXLEN_STR_ARRY_DIM; i++)
    {
        HDstrcpy(comp1_buf.str_array_fixlen[i], fixlen_str_array_buf[i]);
        HDstrcpy(comp1_buf.str_fixlen_array_again[i], fixlen_str_array_buf[i]);

        HDstrcpy(comp2_buf.str_array_fixlen[i], fixlen_str_array_buf[i]);
        HDstrcpy(comp2_buf.str_fixlen_array_again[i], fixlen_str_array_buf[i]);

        HDstrcpy(comp3_buf.str_array_fixlen[i], fixlen_str_array_buf[i]);
        HDstrcpy(comp3_buf.str_fixlen_array_again[i], fixlen_str_array_buf[i]);

        HDstrcpy(comp4_buf.str_array_fixlen[i], fixlen_str_array_buf[i]);
        HDstrcpy(comp4_buf.str_fixlen_array_again[i], fixlen_str_array_buf[i]);

        HDstrcpy(comp5_buf.str_array_fixlen[i], fixlen_str_array_buf[i]);
        HDstrcpy(comp5_buf.str_fixlen_array_again[i], fixlen_str_array_buf[i]);

        HDstrcpy(comp6_buf.str_array_fixlen[i], fixlen_str_array_buf[i]);
        HDstrcpy(comp6_buf.str_fixlen_array_again[i], fixlen_str_array_buf[i]);

        HDstrcpy(comp7_buf.str_array_fixlen[i], fixlen_str_array_buf[i]);
        HDstrcpy(comp7_buf.str_fixlen_array_again[i], fixlen_str_array_buf[i]);

        HDstrcpy(comp8_buf.str_array_fixlen[i], fixlen_str_array_buf[i]);
        HDstrcpy(comp8_buf.str_fixlen_array_again[i], fixlen_str_array_buf[i]);

        HDstrcpy(comp9_buf.str_array_fixlen[i], fixlen_str_array_buf[i]);
        HDstrcpy(comp9_buf.str_fixlen_array_again[i], fixlen_str_array_buf[i]);
    }

    /* int data */
    comp9_buf.int_data1 = 10;
    comp9_buf.int_data2 = 20;
    comp9_buf.int_data3 = 30;


    /*-----------------------------------------------------------------------
    * Create file(s)
    *------------------------------------------------------------------------*/
    if (is_file_new == 1)
    {
        fid1 = H5Fcreate (fname1, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
        if (fid1 < 0)
        {
            fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname1);
            status = FAIL;
            goto out;
        }
    }
    else
    {
        fid1 = H5Fopen (fname1, H5F_ACC_RDWR, H5P_DEFAULT);
        if (fid1 < 0)
        {
            fprintf(stderr, "Error: %s> H5Fopen failed.\n", fname1);
            status = FAIL;
            goto out;
        }
    }

    /*-----------------------------------------------------------------------
    * Create group
    *------------------------------------------------------------------------*/
    gid = H5Gcreate2(fid1, grp_name, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Variable length String1 - Create space and type
    *------------------------------------------------------------------------*/
    sid_vlen_str = H5Screate_simple(STR_RANK, dims_vlen_str, NULL);
    if (sid_vlen_str < 0)
    {
        fprintf(stderr, "Error: %s> H5Screate_simple failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    tid_vlen_str = H5Tcopy(H5T_C_S1);
    status = H5Tset_size(tid_vlen_str, H5T_VARIABLE);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Tset_size failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Fixed length String2 - Create space and type
    *------------------------------------------------------------------------*/
    sid_fixlen_str = H5Screate_simple(STR_RANK, dims_fixlen_str, NULL);
    if (sid_fixlen_str < 0)
    {
        fprintf(stderr, "Error: %s> H5Screate_simple failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    tid_fixlen_str = H5Tcopy(H5T_C_S1);
    status = H5Tset_size(tid_fixlen_str, FIXLEN_STR_SIZE);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Tset_size failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Fixed length String3 array - Create space and type
    *------------------------------------------------------------------------*/
    sid_vlen_str_array = H5Screate_simple(STR_RANK, dims_vlen_str_array, NULL);
    if (sid_vlen_str_array < 0)
    {
        fprintf(stderr, "Error: %s> H5Screate_simple failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    tid_vlen_str_array_pre = H5Tcopy(H5T_C_S1);
    status = H5Tset_size(tid_vlen_str_array_pre, H5T_VARIABLE);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Tset_size failed.\n", fname1);
        status = FAIL;
        goto out;
    }

     /* Create the array data type for the string array                */
    tid_vlen_str_array = H5Tarray_create2(tid_vlen_str_array_pre, COMP_RANK, dims_vlen_str_array);
    if (tid_vlen_str_array < 0)
    {
        fprintf(stderr, "Error: %s> H5Tarray_create2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Variable length String4 array - Create space and type
    *------------------------------------------------------------------------*/
    sid_fixlen_str_array = H5Screate_simple(STR_RANK, dims_fixlen_str_array, NULL);
    if (sid_fixlen_str_array < 0)
    {
        fprintf(stderr, "Error: %s> H5Screate_simple failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    tid_fixlen_str_array_pre = H5Tcopy(H5T_C_S1);
    status = H5Tset_size(tid_fixlen_str_array_pre, FIXLEN_STR_ARRY_SIZE);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Tset_size failed.\n", fname1);
        status = FAIL;
        goto out;
    }
     /* Create the array data type for the string array                */
    tid_fixlen_str_array = H5Tarray_create2(tid_fixlen_str_array_pre, COMP_RANK, dims_fixlen_str_array);
    if (tid_fixlen_str_array < 0)
    {
        fprintf(stderr, "Error: %s> H5Tarray_create2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }

   /*-------------------------------------------------------------------------
    * Compound dataset
    *------------------------------------------------------------------------*/
    sid_comp = H5Screate_simple(COMP_RANK, dims_comp, NULL);
    if (sid_comp < 0)
    {
        fprintf(stderr, "Error: %s> H5Screate_simple failed.\n", fname1);
        status = FAIL;
        goto out;
    }
    tid1_comp = H5Tcreate (H5T_COMPOUND, sizeof(comp1_t));
    tid2_comp = H5Tcreate (H5T_COMPOUND, sizeof(comp2_t));
    tid3_comp = H5Tcreate (H5T_COMPOUND, sizeof(comp3_t));
    tid4_comp = H5Tcreate (H5T_COMPOUND, sizeof(comp4_t));
    tid5_comp = H5Tcreate (H5T_COMPOUND, sizeof(comp5_t));
    tid6_comp = H5Tcreate (H5T_COMPOUND, sizeof(comp6_t));
    tid7_comp = H5Tcreate (H5T_COMPOUND, sizeof(comp7_t));
    tid8_comp = H5Tcreate (H5T_COMPOUND, sizeof(comp8_t));
    tid9_comp = H5Tcreate (H5T_COMPOUND, sizeof(comp9_t));

    /* compound 1 */
    H5Tinsert(tid1_comp, "VLEN_STR1", HOFFSET(comp1_t, str_vlen), tid_vlen_str );
    H5Tinsert(tid1_comp, "VLEN_STR2", HOFFSET(comp1_t, str_vlen_repeat), tid_vlen_str );
    H5Tinsert(tid1_comp, "FIXLEN_STR1", HOFFSET(comp1_t, str_fixlen), tid_fixlen_str );
    H5Tinsert(tid1_comp, "FIXLEN_STR2", HOFFSET(comp1_t, str_fixlen_repeat), tid_fixlen_str );
    H5Tinsert(tid1_comp, "VLEN_STR_ARRAY1", HOFFSET(comp1_t, str_array_vlen), tid_vlen_str_array);
    H5Tinsert(tid1_comp, "VLEN_STR_ARRAY2", HOFFSET(comp1_t, str_vlen_array_again), tid_vlen_str_array);
    H5Tinsert(tid1_comp, "FIXLEN_STR_ARRAY1", HOFFSET(comp1_t, str_array_fixlen), tid_fixlen_str_array);
    H5Tinsert(tid1_comp, "FIXLEN_STR_ARRAY2", HOFFSET(comp1_t, str_fixlen_array_again), tid_fixlen_str_array);

    /* compound 2 */
    H5Tinsert(tid2_comp, "VLEN_STR1", HOFFSET(comp2_t, str_vlen), tid_vlen_str );
    H5Tinsert(tid2_comp, "VLEN_STR2", HOFFSET(comp2_t, str_vlen_repeat), tid_vlen_str );
    H5Tinsert(tid2_comp, "FIXLEN_STR1", HOFFSET(comp2_t, str_fixlen), tid_fixlen_str );
    H5Tinsert(tid2_comp, "FIXLEN_STR2", HOFFSET(comp2_t, str_fixlen_repeat), tid_fixlen_str );
    H5Tinsert(tid2_comp, "VLEN_STR_ARRAY1", HOFFSET(comp2_t, str_array_vlen), tid_vlen_str_array);
    H5Tinsert(tid2_comp, "VLEN_STR_ARRAY2", HOFFSET(comp2_t, str_vlen_array_again), tid_vlen_str_array);
    H5Tinsert(tid2_comp, "FIXLEN_STR_ARRAY1", HOFFSET(comp2_t, str_array_fixlen), tid_fixlen_str_array);
    H5Tinsert(tid2_comp, "FIXLEN_STR_ARRAY2", HOFFSET(comp2_t, str_fixlen_array_again), tid_fixlen_str_array);

    /* compound 3 */
    H5Tinsert(tid3_comp, "VLEN_STR1", HOFFSET(comp3_t, str_vlen), tid_vlen_str );
    H5Tinsert(tid3_comp, "VLEN_STR2", HOFFSET(comp3_t, str_vlen_repeat), tid_vlen_str );
    H5Tinsert(tid3_comp, "FIXLEN_STR1", HOFFSET(comp3_t, str_fixlen), tid_fixlen_str );
    H5Tinsert(tid3_comp, "FIXLEN_STR2", HOFFSET(comp3_t, str_fixlen_repeat), tid_fixlen_str );
    H5Tinsert(tid3_comp, "VLEN_STR_ARRAY1", HOFFSET(comp3_t, str_array_vlen), tid_vlen_str_array);
    H5Tinsert(tid3_comp, "VLEN_STR_ARRAY2", HOFFSET(comp3_t, str_vlen_array_again), tid_vlen_str_array);
    H5Tinsert(tid3_comp, "FIXLEN_STR_ARRAY1", HOFFSET(comp3_t, str_array_fixlen), tid_fixlen_str_array);
    H5Tinsert(tid3_comp, "FIXLEN_STR_ARRAY2", HOFFSET(comp3_t, str_fixlen_array_again), tid_fixlen_str_array);

    /* compound 4 */
    H5Tinsert(tid4_comp, "VLEN_STR1", HOFFSET(comp4_t, str_vlen), tid_vlen_str );
    H5Tinsert(tid4_comp, "VLEN_STR2", HOFFSET(comp4_t, str_vlen_repeat), tid_vlen_str );
    H5Tinsert(tid4_comp, "FIXLEN_STR1", HOFFSET(comp4_t, str_fixlen), tid_fixlen_str );
    H5Tinsert(tid4_comp, "FIXLEN_STR2", HOFFSET(comp4_t, str_fixlen_repeat), tid_fixlen_str );
    H5Tinsert(tid4_comp, "VLEN_STR_ARRAY1", HOFFSET(comp4_t, str_array_vlen), tid_vlen_str_array);
    H5Tinsert(tid4_comp, "VLEN_STR_ARRAY2", HOFFSET(comp4_t, str_vlen_array_again), tid_vlen_str_array);
    H5Tinsert(tid4_comp, "FIXLEN_STR_ARRAY1", HOFFSET(comp4_t, str_array_fixlen), tid_fixlen_str_array);
    H5Tinsert(tid4_comp, "FIXLEN_STR_ARRAY2", HOFFSET(comp4_t, str_fixlen_array_again), tid_fixlen_str_array);

    /* compound 5 */
    H5Tinsert(tid5_comp, "VLEN_STR1", HOFFSET(comp5_t, str_vlen), tid_vlen_str );
    H5Tinsert(tid5_comp, "VLEN_STR2", HOFFSET(comp5_t, str_vlen_repeat), tid_vlen_str );
    H5Tinsert(tid5_comp, "FIXLEN_STR1", HOFFSET(comp5_t, str_fixlen), tid_fixlen_str );
    H5Tinsert(tid5_comp, "FIXLEN_STR2", HOFFSET(comp5_t, str_fixlen_repeat), tid_fixlen_str );
    H5Tinsert(tid5_comp, "VLEN_STR_ARRAY1", HOFFSET(comp5_t, str_array_vlen), tid_vlen_str_array);
    H5Tinsert(tid5_comp, "VLEN_STR_ARRAY2", HOFFSET(comp5_t, str_vlen_array_again), tid_vlen_str_array);
    H5Tinsert(tid5_comp, "FIXLEN_STR_ARRAY1", HOFFSET(comp5_t, str_array_fixlen), tid_fixlen_str_array);
    H5Tinsert(tid5_comp, "FIXLEN_STR_ARRAY2", HOFFSET(comp5_t, str_fixlen_array_again), tid_fixlen_str_array);

    /* compound 6 */
    H5Tinsert(tid6_comp, "VLEN_STR1", HOFFSET(comp6_t, str_vlen), tid_vlen_str );
    H5Tinsert(tid6_comp, "VLEN_STR2", HOFFSET(comp6_t, str_vlen_repeat), tid_vlen_str );
    H5Tinsert(tid6_comp, "FIXLEN_STR1", HOFFSET(comp6_t, str_fixlen), tid_fixlen_str );
    H5Tinsert(tid6_comp, "FIXLEN_STR2", HOFFSET(comp6_t, str_fixlen_repeat), tid_fixlen_str );
    H5Tinsert(tid6_comp, "VLEN_STR_ARRAY1", HOFFSET(comp6_t, str_array_vlen), tid_vlen_str_array);
    H5Tinsert(tid6_comp, "VLEN_STR_ARRAY2", HOFFSET(comp6_t, str_vlen_array_again), tid_vlen_str_array);
    H5Tinsert(tid6_comp, "FIXLEN_STR_ARRAY1", HOFFSET(comp6_t, str_array_fixlen), tid_fixlen_str_array);
    H5Tinsert(tid6_comp, "FIXLEN_STR_ARRAY2", HOFFSET(comp6_t, str_fixlen_array_again), tid_fixlen_str_array);

    /* compound 7 */
    H5Tinsert(tid7_comp, "VLEN_STR1", HOFFSET(comp7_t, str_vlen), tid_vlen_str );
    H5Tinsert(tid7_comp, "VLEN_STR2", HOFFSET(comp7_t, str_vlen_repeat), tid_vlen_str );
    H5Tinsert(tid7_comp, "FIXLEN_STR1", HOFFSET(comp7_t, str_fixlen), tid_fixlen_str );
    H5Tinsert(tid7_comp, "FIXLEN_STR2", HOFFSET(comp7_t, str_fixlen_repeat), tid_fixlen_str );
    H5Tinsert(tid7_comp, "VLEN_STR_ARRAY1", HOFFSET(comp7_t, str_array_vlen), tid_vlen_str_array);
    H5Tinsert(tid7_comp, "VLEN_STR_ARRAY2", HOFFSET(comp7_t, str_vlen_array_again), tid_vlen_str_array);
    H5Tinsert(tid7_comp, "FIXLEN_STR_ARRAY1", HOFFSET(comp7_t, str_array_fixlen), tid_fixlen_str_array);
    H5Tinsert(tid7_comp, "FIXLEN_STR_ARRAY2", HOFFSET(comp7_t, str_fixlen_array_again), tid_fixlen_str_array);

    /* compound 8 */
    H5Tinsert(tid8_comp, "VLEN_STR1", HOFFSET(comp8_t, str_vlen), tid_vlen_str );
    H5Tinsert(tid8_comp, "VLEN_STR2", HOFFSET(comp8_t, str_vlen_repeat), tid_vlen_str );
    H5Tinsert(tid8_comp, "FIXLEN_STR1", HOFFSET(comp8_t, str_fixlen), tid_fixlen_str );
    H5Tinsert(tid8_comp, "FIXLEN_STR2", HOFFSET(comp8_t, str_fixlen_repeat), tid_fixlen_str );
    H5Tinsert(tid8_comp, "VLEN_STR_ARRAY1", HOFFSET(comp8_t, str_array_vlen), tid_vlen_str_array);
    H5Tinsert(tid8_comp, "VLEN_STR_ARRAY2", HOFFSET(comp8_t, str_vlen_array_again), tid_vlen_str_array);
    H5Tinsert(tid8_comp, "FIXLEN_STR_ARRAY1", HOFFSET(comp8_t, str_array_fixlen), tid_fixlen_str_array);
    H5Tinsert(tid8_comp, "FIXLEN_STR_ARRAY2", HOFFSET(comp8_t, str_fixlen_array_again), tid_fixlen_str_array);

    /* compound 9 */
    H5Tinsert(tid9_comp, "VLEN_STR1", HOFFSET(comp9_t, str_vlen), tid_vlen_str );
    H5Tinsert(tid9_comp, "VLEN_STR2", HOFFSET(comp9_t, str_vlen_repeat), tid_vlen_str );
    H5Tinsert(tid9_comp, "FIXLEN_STR1", HOFFSET(comp9_t, str_fixlen), tid_fixlen_str );
    H5Tinsert(tid9_comp, "FIXLEN_STR2", HOFFSET(comp9_t, str_fixlen_repeat), tid_fixlen_str );
    H5Tinsert(tid9_comp, "VLEN_STR_ARRAY1", HOFFSET(comp9_t, str_array_vlen), tid_vlen_str_array);
    H5Tinsert(tid9_comp, "VLEN_STR_ARRAY2", HOFFSET(comp9_t, str_vlen_array_again), tid_vlen_str_array);
    H5Tinsert(tid9_comp, "FIXLEN_STR_ARRAY1", HOFFSET(comp9_t, str_array_fixlen), tid_fixlen_str_array);
    H5Tinsert(tid9_comp, "FIXLEN_STR_ARRAY2", HOFFSET(comp9_t, str_fixlen_array_again), tid_fixlen_str_array);
    H5Tinsert(tid9_comp, "INT_DATA1", HOFFSET(comp9_t, int_data1), H5T_STD_I32LE);
    H5Tinsert(tid9_comp, "INT_DATA2", HOFFSET(comp9_t, int_data2), H5T_STD_I32BE);
    H5Tinsert(tid9_comp, "INT_DATA3", HOFFSET(comp9_t, int_data3), H5T_STD_I32LE);
    H5Tinsert(tid9_comp, "OBJREF1", HOFFSET(comp9_t, objref1), H5T_STD_REF_OBJ);
    H5Tinsert(tid9_comp, "OBJREF2", HOFFSET(comp9_t, objref2), H5T_STD_REF_OBJ);
    H5Tinsert(tid9_comp, "OBJREF3", HOFFSET(comp9_t, objref3), H5T_STD_REF_OBJ);


    /* Write data to compound 1 dataset buffer */
    did_comp = H5Dcreate2(gid, "Compound_dset1", tid1_comp, sid_comp, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    status = H5Dwrite(did_comp, tid1_comp, H5S_ALL, H5S_ALL, H5P_DEFAULT, &comp1_buf);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Dwrite failed.\n", fname1);
        status = FAIL;
        goto out;
    }
    H5Dclose(did_comp);

    /* Write data to compound 2 dataset buffer */
    did_comp = H5Dcreate2(gid, "Compound_dset2", tid2_comp, sid_comp, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    status = H5Dwrite(did_comp, tid2_comp, H5S_ALL, H5S_ALL, H5P_DEFAULT, &comp2_buf);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Dwrite failed.\n", fname1);
        status = FAIL;
        goto out;
    }
    H5Dclose(did_comp);

    /* Write data to compound 3 dataset buffer */
    did_comp = H5Dcreate2(gid, "Compound_dset3", tid3_comp, sid_comp, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    status = H5Dwrite(did_comp, tid3_comp, H5S_ALL, H5S_ALL, H5P_DEFAULT, &comp3_buf);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Dwrite failed.\n", fname1);
        status = FAIL;
        goto out;
    }
    H5Dclose(did_comp);

    /* Write data to compound 4 dataset buffer */
    did_comp = H5Dcreate2(gid, "Compound_dset4", tid4_comp, sid_comp, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    status = H5Dwrite(did_comp, tid4_comp, H5S_ALL, H5S_ALL, H5P_DEFAULT, &comp4_buf);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Dwrite failed.\n", fname1);
        status = FAIL;
        goto out;
    }
    H5Dclose(did_comp);

    /* Write data to compound 5 dataset buffer */
    did_comp = H5Dcreate2(gid, "Compound_dset5", tid5_comp, sid_comp, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    status = H5Dwrite(did_comp, tid5_comp, H5S_ALL, H5S_ALL, H5P_DEFAULT, &comp5_buf);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Dwrite failed.\n", fname1);
        status = FAIL;
        goto out;
    }
    H5Dclose(did_comp);

    /* Write data to compound 6 dataset buffer */
    did_comp = H5Dcreate2(gid, "Compound_dset6", tid6_comp, sid_comp, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    status = H5Dwrite(did_comp, tid6_comp, H5S_ALL, H5S_ALL, H5P_DEFAULT, &comp6_buf);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Dwrite failed.\n", fname1);
        status = FAIL;
        goto out;
    }
    H5Dclose(did_comp);

    /* Write data to compound 7 dataset buffer */
    did_comp = H5Dcreate2(gid, "Compound_dset7", tid7_comp, sid_comp, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    status = H5Dwrite(did_comp, tid7_comp, H5S_ALL, H5S_ALL, H5P_DEFAULT, &comp7_buf);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Dwrite failed.\n", fname1);
        status = FAIL;
        goto out;
    }
    H5Dclose(did_comp);

    /* Write data to compound 8 dataset buffer */
    did_comp = H5Dcreate2(gid, "Compound_dset8", tid8_comp, sid_comp, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    status = H5Dwrite(did_comp, tid8_comp, H5S_ALL, H5S_ALL, H5P_DEFAULT, &comp8_buf);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Dwrite failed.\n", fname1);
        status = FAIL;
        goto out;
    }
    H5Dclose(did_comp);

    /* Write data to compound 9 dataset buffer */
    did_comp = H5Dcreate2(gid, "Compound_dset9", tid9_comp, sid_comp, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);

    /* obj references */
    status=H5Rcreate(&(comp9_buf.objref1),gid,"Compound_dset2",H5R_OBJECT,(hid_t)-1);
    status=H5Rcreate(&(comp9_buf.objref2),gid,"Compound_dset3",H5R_OBJECT,(hid_t)-1);
    status=H5Rcreate(&(comp9_buf.objref3),gid,"Compound_dset4",H5R_OBJECT,(hid_t)-1);

    status = H5Dwrite(did_comp, tid9_comp, H5S_ALL, H5S_ALL, H5P_DEFAULT, &comp9_buf);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Dwrite failed.\n", fname1);
        status = FAIL;
        goto out;
    }


    H5Dclose(did_comp);

    did_comp=0;
out:
   /*-----------------------------------------------------------------------
    * Close
    *-----------------------------------------------------------------------*/
    if(fid1)
        H5Fclose(fid1);
    if(gid)
        H5Gclose(gid);
    /* vlen string */
    if(tid_vlen_str)
        H5Tclose(tid_vlen_str);
    if(sid_vlen_str)
        H5Sclose(sid_vlen_str);
    /* fixed len string */
    if(tid_fixlen_str)
        H5Tclose(tid_fixlen_str);
    if(sid_fixlen_str)
        H5Sclose(sid_fixlen_str);
    /* vlen string array */
    if(tid_vlen_str_array_pre)
        H5Tclose(tid_vlen_str_array_pre);
    if(tid_vlen_str_array)
        H5Tclose(tid_vlen_str_array);
    if(sid_vlen_str_array)
        H5Sclose(sid_vlen_str_array);
    /* fixed len string array */
    if(tid_fixlen_str_array_pre)
        H5Tclose(tid_fixlen_str_array_pre);
    if(tid_fixlen_str_array)
        H5Tclose(tid_fixlen_str_array);
    if(sid_fixlen_str_array)
        H5Sclose(sid_fixlen_str_array);
    /* compound */
    if(tid1_comp)
        H5Tclose(tid1_comp);
    if(tid2_comp)
        H5Tclose(tid2_comp);
    if(tid3_comp)
        H5Tclose(tid3_comp);
    if(tid4_comp)
        H5Tclose(tid4_comp);
    if(tid5_comp)
        H5Tclose(tid5_comp);
    if(tid6_comp)
        H5Tclose(tid6_comp);
    if(tid7_comp)
        H5Tclose(tid7_comp);
    if(tid8_comp)
        H5Tclose(tid8_comp);
    if(tid9_comp)
        H5Tclose(tid9_comp);
    if(did_comp)
        H5Dclose(did_comp);
    if(sid_comp)
        H5Sclose(sid_comp);

    return status;
}


/*-------------------------------------------------------------------------
*
* Purpose: Test diffs of enum values which may include invalid values.
*
* Programmer: Dana Robinson
*
*-------------------------------------------------------------------------*/

static int
test_enums(const char *fname)
{
    hid_t       fid  = -1;

    hid_t       tid       = -1;
    int         enum_val  = -1;

    /* The data in the two arrays cover the following cases:
     *
     *   V = valid enum value, I = invalid enum value
     *
     *   0:  I-I (same value)
     *   1:  V-I
     *   2:  I-V
     *   3:  V-V (same value)
     *   4:  I-I (different values) SKIPPED FOR NOW
     *   5:  V-V (different values)
     */
    /* *** NOTE ***
     *
     * There is a bug in H5Dread() where invalid enum values are always
     * returned as -1 so two different invalid enum values cannot be
     * properly compared.  Test 4 has been adjusted to pass here
     * while we fix the issue.
     */
    int         data1[6] = {9, 0, 9, 0, 9, 0};
    /*int         data1[6] = {9, 0, 9, 0, 8, 0};  */
    int         data2[6] = {9, 9, 0, 0, 9, 1};

    hsize_t     dims = 6;

    herr_t      status = SUCCEED;

    /*-----------------------------------------------------------------------
     * Create the file
     *---------------------------------------------------------------------*/

    fid = H5Fcreate(fname, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);

    /*-----------------------------------------------------------------------
     * Create enum types
     *---------------------------------------------------------------------*/

    tid = H5Tenum_create(H5T_NATIVE_INT);
    enum_val = 0;
    status = H5Tenum_insert(tid, "YIN", &enum_val);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Tenum_insert failed.\n", fname);
        status = FAIL;
        goto out;
    }
    enum_val = 1;
    status = H5Tenum_insert(tid, "YANG", &enum_val);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Tenum_insert failed.\n", fname);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
     * Create datasets containing enum data.
     *---------------------------------------------------------------------*/

    status = write_dset(fid, 1, &dims, "dset1", tid, data1);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> write_dset failed.\n", fname);
        status = FAIL;
        goto out;
    }
    status = write_dset(fid, 1, &dims, "dset2", tid, data2);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> write_dset failed.\n", fname);
        status = FAIL;
        goto out;
    }

out:
    /*-----------------------------------------------------------------------
     * Close
     *---------------------------------------------------------------------*/
    if(fid)
        H5Fclose(fid);
    if(tid)
        H5Tclose(tid);

    return status;
}

/*-------------------------------------------------------------------------
*
* Purpose: 
*   Create test files with dataset and attribute with container types 
*   (array, vlen) with multiple nested compound types.
*
* Function: test_comps_array()
*  - type: compound->array->compound
*
* Function: test_comps_vlen()
*  - type: compound->vlen->compound
*
* Function: test_comps_array_vlen()
*  - type: compound->array->compound->vlen->compound
*
* Function: test_comps_vlen_arry()
*  - type: compound->vlen->compound->array->compound
*
* Programmer: Jonathan Kim (Sep, 1, 2011)
*
*-------------------------------------------------------------------------*/
#define SDIM_DSET 2
#define SDIM_CMPD_ARRAY 2

static void test_comps_array (const char *fname, const char *dset, const char *attr,int diff, int is_file_new)
{
    /* sub compound 2 */
    typedef struct {        
        int i2;
        float f2;
    } cmpd2_t;

    /* top compound 1 */
    typedef struct {
        int i1;
        cmpd2_t cmpd2[SDIM_CMPD_ARRAY];
    } cmpd1_t;

    cmpd1_t wdata[SDIM_DSET];   /* dataset with compound1 */

    hid_t  fid;  /* HDF5 File IDs  */
    hid_t  did_dset; /* Dataset ID   */
    hid_t  sid_dset;       /* Dataset space ID   */
    hid_t  tid_cmpd1;       /* Compound1 type ID   */
    hid_t  tid_arry1;       /* Array type ID in compound1   */
    hid_t  tid_cmpd2;       /* Compound2 type ID   */
    hid_t  tid_attr;
    hsize_t  sdims_dset[] = {SDIM_DSET};
    hsize_t  sdims_cmpd_arry[] = {SDIM_CMPD_ARRAY};
    int     i,j;       
    herr_t  ret;  /* Generic return value  */

    /* Initialize array data to write */
    for(i=0; i < SDIM_DSET; i++)
    {
        wdata[i].i1 = i;
        for(j=0; j < SDIM_CMPD_ARRAY; j++) 
        {
            wdata[i].cmpd2[j].i2 = i*10 + diff;
            wdata[i].cmpd2[j].f2 = (float)(i*10.5) + diff;
        } /* end for */
    }

   /*-----------------------------------------------------------------------
    * Create file(s)
    *------------------------------------------------------------------------*/
    if (is_file_new == 1)
        fid = H5Fcreate(fname, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    else
        fid = H5Fopen (fname, H5F_ACC_RDWR, H5P_DEFAULT);


    /* -------------------------------
     * Create a sub compound2 datatype  */
    tid_cmpd2 = H5Tcreate(H5T_COMPOUND, sizeof(cmpd2_t));

    /* Insert integer field */
    ret = H5Tinsert(tid_cmpd2, "int2", HOFFSET(cmpd2_t, i2), H5T_NATIVE_INT);
    assert(ret >= 0);

    /* Insert float field */
    ret = H5Tinsert(tid_cmpd2, "float2", HOFFSET(cmpd2_t, f2), H5T_NATIVE_FLOAT);
    assert(ret >= 0);

    /*-----------------------------------
     * Create a top compound1.
     */
    tid_cmpd1 = H5Tcreate (H5T_COMPOUND, sizeof(cmpd1_t));

    ret = H5Tinsert(tid_cmpd1, "int1", HOFFSET(cmpd1_t, i1), H5T_NATIVE_INT);
    assert(ret >= 0);

    /* Create an array datatype */
    tid_arry1 = H5Tarray_create2(tid_cmpd2, 1, sdims_cmpd_arry);
    /* insert the array */
    ret = H5Tinsert(tid_cmpd1, "array_cmpd1", HOFFSET(cmpd1_t, cmpd2), tid_arry1);
    assert(ret >= 0);


    /* -------------------
     * Create a dataset 
     */
    /* Create dataspace for datasets */
    sid_dset = H5Screate_simple(1, sdims_dset, NULL);

    did_dset = H5Dcreate2(fid, dset, tid_cmpd1, sid_dset, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);

    /* Write dataset to disk */
    ret = H5Dwrite(did_dset, tid_cmpd1, H5S_ALL, H5S_ALL, H5P_DEFAULT, wdata);
    assert(ret >= 0);

    /*-----------------------------------
     * Create an attribute in root group
     */
    tid_attr = H5Acreate2(fid, attr, tid_cmpd1, sid_dset, H5P_DEFAULT, H5P_DEFAULT);
    assert(tid_attr > 0);
    ret = H5Awrite(tid_attr, tid_cmpd1, wdata);
    assert(ret >= 0);

    /* ----------------
     * Close Dataset */
    ret = H5Aclose(tid_attr);
    assert(ret >= 0);
    ret = H5Tclose(tid_arry1);
    assert(ret >= 0);
    ret = H5Dclose(did_dset);
    assert(ret >= 0);
    ret = H5Tclose(tid_cmpd1);
    assert(ret >= 0);
    ret = H5Tclose(tid_cmpd2);
    assert(ret >= 0);
    ret = H5Sclose(sid_dset);
    assert(ret >= 0);
    ret = H5Fclose(fid);
    assert(ret >= 0);
}



static void test_comps_vlen (const char * fname, const char *dset, const char *attr, int diff, int is_file_new)
{
    /* sub compound 2 */
    typedef struct {       
        int i2;
        float f2;
    } cmpd2_t;

    /* top compound 1 */
    typedef struct { 
        int i1;
        hvl_t vl;   /* VL information for compound2 */
    } cmpd1_t;

    cmpd1_t wdata[SDIM_DSET];   /* Dataset for compound1 */ 

    hid_t  fid;  /* HDF5 File ID */
    hid_t  did_dset; /* dataset ID   */
    hid_t  sid_dset;  /* dataset space ID */
    hid_t  tid_attr;
    hid_t  tid_cmpd2; /* compound2 type ID */
    hid_t  tid_cmpd1; /* compound1 type ID */
    hid_t  tid_cmpd1_vlen;
    hsize_t  sdims_dset[] = {SDIM_DSET};

    unsigned       i,j;        /* counting variables */
    herr_t  ret;  /* Generic return value  */

    /* Allocate and initialize VL data to write */
    for(i=0; i<SDIM_DSET; i++)
    {
        wdata[i].i1 = i;
        wdata[i].vl.p = HDmalloc((i+1)*sizeof(cmpd2_t));
        wdata[i].vl.len = i+1;
        for(j=0; j<(i+1); j++)
        {
            ((cmpd2_t *)wdata[i].vl.p)[j].i2 = i*10 + diff;
            ((cmpd2_t *)wdata[i].vl.p)[j].f2 = (float)(i*10.5) + diff;
        } /* end for */
    } /* end for */

    /*-----------------------------------------------------------------------
     * Create file(s)
     *------------------------------------------------------------------------*/
    if (is_file_new == 1)
        fid = H5Fcreate(fname, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    else
        fid = H5Fopen (fname, H5F_ACC_RDWR, H5P_DEFAULT);

    /* -----------------------------
     * Create sub compound2 type */
    tid_cmpd2 = H5Tcreate(H5T_COMPOUND, sizeof(cmpd2_t));

    /* Insert fields */
    ret = H5Tinsert(tid_cmpd2, "int2", HOFFSET(cmpd2_t, i2), H5T_NATIVE_INT);
    assert(ret >= 0);
    ret = H5Tinsert(tid_cmpd2, "float2", HOFFSET(cmpd2_t, f2), H5T_NATIVE_FLOAT);
    assert(ret >= 0);

    /* ---------------------------
     * Create top compound1 type */
    tid_cmpd1 = H5Tcreate(H5T_COMPOUND, sizeof(cmpd1_t));
    /* Insert fields */
    ret = H5Tinsert(tid_cmpd1, "int1", HOFFSET(cmpd1_t, i1), H5T_NATIVE_INT);
    assert(ret >= 0);
    /* Create a VL datatype */
    tid_cmpd1_vlen = H5Tvlen_create(tid_cmpd2);

    ret = H5Tinsert(tid_cmpd1, "vlen_cmpd1", HOFFSET(cmpd1_t, vl), tid_cmpd1_vlen);
    assert(ret >= 0);

    /* -------------------------------
     * Create dataset with compound1 
     */
    /* Create dataspace for dataset */
    sid_dset = H5Screate_simple(1, sdims_dset, NULL);

    /* Create a dataset */
    did_dset = H5Dcreate2(fid, dset, tid_cmpd1, sid_dset, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);

    /* Write dataset to disk */
    ret = H5Dwrite(did_dset, tid_cmpd1, H5S_ALL, H5S_ALL, H5P_DEFAULT, wdata);
    assert(ret >= 0);

    /*-----------------------------------
     * Create an attribute in root group
     */
    tid_attr = H5Acreate2(fid, attr, tid_cmpd1, sid_dset, H5P_DEFAULT, H5P_DEFAULT);
    assert(tid_attr > 0);
    ret = H5Awrite(tid_attr, tid_cmpd1, wdata);
    assert(ret >= 0);

    /* Reclaim the write VL data */
    ret = H5Dvlen_reclaim(tid_cmpd1, sid_dset, H5P_DEFAULT, wdata);
    assert(ret >= 0);

    /* ----------------
     * Close IDs */
    ret = H5Aclose(tid_attr);
    assert(ret >= 0);
    ret = H5Dclose(did_dset);
    assert(ret >= 0);
    ret = H5Tclose(tid_cmpd2);
    assert(ret >= 0);
    ret = H5Tclose(tid_cmpd1);
    assert(ret >= 0);
    ret = H5Sclose(sid_dset);
    assert(ret >= 0);
    ret = H5Tclose(tid_cmpd1_vlen);
    assert(ret >= 0);
    ret = H5Fclose(fid);
    assert(ret >= 0);
}


static void test_comps_array_vlen (const char * fname, const char *dset,const char *attr, int diff, int is_file_new)
{
    typedef struct {       
        int i3;
        float f3;
    } cmpd3_t;
 
    typedef struct {        /* Typedef for compound datatype */
        int i2;
        hvl_t vl;   /* VL information to write */
    } cmpd2_t;

    typedef struct {
        int i1;
        cmpd2_t cmpd2[SDIM_CMPD_ARRAY];
    } cmpd1_t;

    cmpd1_t wdata[SDIM_DSET];   /* Information to write */
    hid_t  fid;  /* HDF5 File IDs  */
    hid_t  did_dset; /* Dataset ID   */
    hid_t  sid_dset;       /* Dataspace ID   */
    hid_t  tid_attr;
    hid_t  tid_cmpd1;       /* Compound1 Datatype ID   */
    hid_t  tid_arry1;       /* Array Datatype ID   */
    hid_t  tid_cmpd2;       /* Compound2 Datatype ID   */
    hid_t  tid_cmpd2_vlen;
    hid_t  tid_cmpd3;       /* Compound3 Datatype ID   */
    hsize_t  sdims_dset[] = {SDIM_DSET};
    hsize_t  sdims_arry[] = {SDIM_CMPD_ARRAY};
    int        i,j,k;        /* counting variables */
    herr_t  ret;  /* Generic return value  */



    /* Initialize array data to write in compound1 */
    for(i=0; i < SDIM_DSET; i++)
    {
        wdata[i].i1 = i;
        /* Allocate and initialize VL data to write in compound2 */
        for(j=0; j < SDIM_CMPD_ARRAY; j++) 
        {
            wdata[i].cmpd2[j].i2 = j*10;
            wdata[i].cmpd2[j].vl.p = HDmalloc((j+1)*sizeof(cmpd3_t));
            wdata[i].cmpd2[j].vl.len = j+1;
            for(k=0; k<(j+1); k++) 
            {
                /* Initialize data of compound3 */
                ((cmpd3_t *)wdata[i].cmpd2[j].vl.p)[k].i3 = j*10 + diff;
                ((cmpd3_t *)wdata[i].cmpd2[j].vl.p)[k].f3 = (float)(j*10.5) + diff;
            } /* end for */
        } /* end for */
    }

    /*-----------------------------------------------------------------------
     * Create file(s)
     *------------------------------------------------------------------------*/
    if (is_file_new == 1)
        fid = H5Fcreate(fname, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    else
        fid = H5Fopen (fname, H5F_ACC_RDWR, H5P_DEFAULT);

    /* Create dataspace for datasets */
    sid_dset = H5Screate_simple(1, sdims_dset, NULL);

    /*-------------------------------------
     * Create a sub compound3 datatype  */
    tid_cmpd3 = H5Tcreate(H5T_COMPOUND, sizeof(cmpd3_t));

    /* Insert integer field */
    ret = H5Tinsert(tid_cmpd3, "int", HOFFSET(cmpd3_t, i3), H5T_NATIVE_INT);
    assert(ret >= 0);

    /* Insert float field */
    ret = H5Tinsert(tid_cmpd3, "float", HOFFSET(cmpd3_t, f3), H5T_NATIVE_FLOAT);
    assert(ret >= 0);


    /*-------------------------------------
     * Create a sub compound2 datatype  */
    tid_cmpd2 = H5Tcreate(H5T_COMPOUND, sizeof(cmpd2_t));

    /* Insert integer field */
    ret = H5Tinsert(tid_cmpd2, "int", HOFFSET(cmpd2_t, i2), H5T_NATIVE_INT);
    assert(ret >= 0);
    /* Create a VL datatype */
    tid_cmpd2_vlen = H5Tvlen_create(tid_cmpd3);
    ret = H5Tinsert(tid_cmpd2, "vlen", HOFFSET(cmpd2_t, vl), tid_cmpd2_vlen);
    assert(ret >= 0);


    /*-----------------------------------
     * Create a top compound1 datatype for dataset.
     */
    tid_cmpd1 = H5Tcreate (H5T_COMPOUND, sizeof(cmpd1_t));

    /* Create an array datatype */
    tid_arry1 = H5Tarray_create2(tid_cmpd2, 1, sdims_arry);
    /* insert the array */
    H5Tinsert(tid_cmpd1, "array_comp", HOFFSET(cmpd1_t, cmpd2), tid_arry1);


    /* ----------------------
     * Create a dataset */
    did_dset = H5Dcreate2(fid, dset, tid_cmpd1, sid_dset, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);

    /* Write dataset to disk */
    ret = H5Dwrite(did_dset, tid_cmpd1, H5S_ALL, H5S_ALL, H5P_DEFAULT, wdata);
    assert(ret >= 0);

    /*-----------------------------------
     * Create an attribute in root group
     */
    tid_attr = H5Acreate2(fid, attr, tid_cmpd1, sid_dset, H5P_DEFAULT, H5P_DEFAULT);
    assert(tid_attr > 0);
    ret = H5Awrite(tid_attr, tid_cmpd1, wdata);
    assert(ret >= 0);

    /* Reclaim the write VL data */
    ret = H5Dvlen_reclaim(tid_cmpd1, sid_dset, H5P_DEFAULT, wdata);
    assert(ret >= 0);

    /*-------------------
     * Close IDs */
    ret = H5Aclose(tid_attr);
    assert(ret >= 0);
    ret = H5Tclose(tid_arry1);
    assert(ret >= 0);
    ret = H5Dclose(did_dset);
    assert(ret >= 0);
    ret = H5Sclose(sid_dset);
    assert(ret >= 0);
    ret = H5Tclose(tid_cmpd3);
    assert(ret >= 0);
    ret = H5Tclose(tid_cmpd2);
    assert(ret >= 0);
    ret = H5Tclose(tid_cmpd2_vlen);
    assert(ret >= 0);
    ret = H5Tclose(tid_cmpd1);
    assert(ret >= 0);
    ret = H5Fclose(fid);
    assert(ret >= 0);
}


static void test_comps_vlen_arry (const char * fname, const char *dset, const char *attr, int diff, int is_file_new)
{
    /* sub compound 3 */
    typedef struct {       
        int i3;
        float f3;
    } cmpd3_t;

    /* sub compound 2 */
    typedef struct {       
        int i2;
        cmpd3_t cmpd3[SDIM_CMPD_ARRAY];
    } cmpd2_t;

    /* top compound 1 */
    typedef struct { 
        int i1;
        hvl_t vl;   /* VL information for compound2 */
    } cmpd1_t;

    cmpd1_t wdata[SDIM_DSET];   /* Dataset for compound1 */

    hid_t  fid;  /* HDF5 File ID */
    hid_t  did_dset; /* dataset ID   */
    hid_t  sid_dset;  /* dataset space ID */
    hid_t  tid_attr;
    hid_t  tid_cmpd3; /* compound3 type ID */
    hid_t  tid_cmpd2; /* compound2 type ID */
    hid_t  tid_cmpd2_arry;
    hid_t  tid_cmpd1; /* compound1 type ID */
    hid_t  tid_cmpd1_vlen;
    hsize_t  sdims_dset[] = {SDIM_DSET};
    hsize_t  sdims_cmpd_arry[] = {SDIM_CMPD_ARRAY};

    unsigned       i,j,k;        /* counting variables */
    herr_t  ret;  /* Generic return value  */

    /* Allocate and initialize VL data to write */
    for(i=0; i<SDIM_DSET; i++)
    {
        /* compound 1 data */
        wdata[i].i1 = i;
        wdata[i].vl.p = HDmalloc((i+1)*sizeof(cmpd2_t));
        wdata[i].vl.len = i+1;
        for(j=0; j<(i+1); j++)
        {
            /* compound2 data */
            ((cmpd2_t *)wdata[i].vl.p)[j].i2 = i*10 + diff;
            for (k=0; k < SDIM_CMPD_ARRAY; k++)
            {
                /* compound 3 data */
                ((cmpd2_t *)(wdata[i].vl.p))[j].cmpd3[k].i3 = k*10.5 + diff;
                ((cmpd2_t *)(wdata[i].vl.p))[j].cmpd3[k].f3 = (float)(k*10.5) + diff;
            }
        } /* end for */
    } /* end for */

    /*-----------------------------------------------------------------------
     * Create file(s)
     *------------------------------------------------------------------------*/
    if (is_file_new == 1)
        fid = H5Fcreate(fname, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    else
        fid = H5Fopen (fname, H5F_ACC_RDWR, H5P_DEFAULT);

    /* -----------------------------
     * Create sub compound3 type */
    tid_cmpd3 = H5Tcreate(H5T_COMPOUND, sizeof(cmpd3_t));

    /* Insert fields */
    ret = H5Tinsert(tid_cmpd3, "int3", HOFFSET(cmpd3_t, i3), H5T_NATIVE_INT);
    assert(ret >= 0);
    ret = H5Tinsert(tid_cmpd3, "float3", HOFFSET(cmpd3_t, f3), H5T_NATIVE_FLOAT);
    assert(ret >= 0);

    /* -----------------------------
     * Create sub compound2 type */
    tid_cmpd2 = H5Tcreate(H5T_COMPOUND, sizeof(cmpd2_t));

    ret = H5Tinsert(tid_cmpd2, "int2", HOFFSET(cmpd2_t, i2), H5T_NATIVE_INT);
    assert(ret >= 0);

    tid_cmpd2_arry = H5Tarray_create2(tid_cmpd3, 1, sdims_cmpd_arry);
    ret = H5Tinsert(tid_cmpd2, "array_cmpd2", HOFFSET(cmpd2_t, cmpd3), tid_cmpd2_arry);
    assert(ret >= 0);

    /* ---------------------------
     * Create top compound1 type
     */
    /* Create a VL datatype */
    tid_cmpd1 = H5Tcreate(H5T_COMPOUND, sizeof(cmpd1_t));
    /* Insert fields */
    ret = H5Tinsert(tid_cmpd1, "int1", HOFFSET(cmpd1_t, i1), H5T_NATIVE_INT);
    assert(ret >= 0);
    tid_cmpd1_vlen = H5Tvlen_create(tid_cmpd2);
    ret = H5Tinsert(tid_cmpd1, "vlen_cmpd1", HOFFSET(cmpd1_t, vl), tid_cmpd1_vlen);
    assert(ret >= 0);

    /* -------------------------------
     * Create dataset with compound1 
     */
    /* Create dataspace for dataset */
    sid_dset = H5Screate_simple(1, sdims_dset, NULL);

    /* Create a dataset */
    did_dset = H5Dcreate2(fid, dset, tid_cmpd1, sid_dset, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);

    /* Write dataset to disk */
    ret = H5Dwrite(did_dset, tid_cmpd1, H5S_ALL, H5S_ALL, H5P_DEFAULT, wdata);
    assert(ret >= 0);

    /*-----------------------------------
     * Create an attribute in root group
     */
    tid_attr = H5Acreate2(fid, attr, tid_cmpd1, sid_dset, H5P_DEFAULT, H5P_DEFAULT);
    assert(tid_attr > 0);
    ret = H5Awrite(tid_attr, tid_cmpd1, wdata);
    assert(ret >= 0);

    /* Reclaim the write VL data */
    ret = H5Dvlen_reclaim(tid_cmpd1, sid_dset, H5P_DEFAULT, wdata);
    assert(ret >= 0);

    /* ----------------
     * Close IDs */
    ret = H5Aclose(tid_attr);
    assert(ret >= 0);
    ret = H5Dclose(did_dset);
    assert(ret >= 0);
    ret = H5Sclose(sid_dset);
    assert(ret >= 0);
    ret = H5Tclose(tid_cmpd3);
    assert(ret >= 0);
    ret = H5Tclose(tid_cmpd2_arry);
    assert(ret >= 0);
    ret = H5Tclose(tid_cmpd2);
    assert(ret >= 0);
    ret = H5Tclose(tid_cmpd1_vlen);
    assert(ret >= 0);
    ret = H5Tclose(tid_cmpd1);
    assert(ret >= 0);
    ret = H5Fclose(fid);
    assert(ret >= 0);
}


/*-------------------------------------------------------------------------
* Function: test_data_nocomparables
*
* Purpose: 
*   Create test files with non-comparable dataset and attributes with 
*   comparable datasets and attributes.  All the comparables should display 
*   differences.
*
*-------------------------------------------------------------------------*/
#define DIM_ARRY 3
static void test_data_nocomparables (const char * fname, int make_diffs)
{
    hid_t   fid=0;
    hid_t   gid1=0;
    hid_t   gid2=0;
    hid_t   did1=0;
    hid_t   did2=0;
    hid_t   sid1=0;
    hid_t   tid_dset1=0;
    hid_t   tid_attr1=0;
    hsize_t dims1_1[1] = {DIM_ARRY};
    hsize_t dims1_2[1] = {DIM_ARRY+1};
    hsize_t dims2[2] = {DIM_ARRY, 1};
    int data1[DIM_ARRY] = {0,0,0};
    int data2[DIM_ARRY] = {1,1,1};
    int data3[DIM_ARRY+1] = {1,1,1,1};
    int data1_dim2[DIM_ARRY][1] = {{0},{0},{0}};
    int rank_attr;
    char data1_str[DIM_ARRY][STR_SIZE]= {"ab","cd","ef"};
    herr_t  status = SUCCEED;
    void *dset_data_ptr1=NULL;
    void *dset_data_ptr2=NULL;
    void *dset_data_ptr3=NULL;
    void *attr_data_ptr1=NULL;
    void *attr_data_ptr2=NULL;
    void *attr_data_ptr3=NULL;
    void *attr_data_ptr4=NULL;
    void *attr2_dim_ptr=NULL;
    void *attr3_dim_ptr=NULL;

    /* init */
    tid_dset1=H5Tcopy(H5T_NATIVE_INT);
    dset_data_ptr1=(int*)&data1;
    dset_data_ptr2=(int*)&data1;
    dset_data_ptr3=(int*)&data1;
    tid_attr1=H5Tcopy(H5T_NATIVE_INT);
    attr_data_ptr1=(int*)&data1;
    attr_data_ptr3=(int*)&data1;
    attr_data_ptr4=(int*)&data1;
    attr2_dim_ptr=(hsize_t*)&dims1_1;
    attr3_dim_ptr=(hsize_t*)&dims1_1;
    rank_attr=1;

    if (make_diffs)
    {
        /* ------------
         * group1 */
        tid_dset1=H5Tcopy(H5T_C_S1);
        H5Tset_size(tid_dset1, (size_t)STR_SIZE);
        dset_data_ptr1=(char*)&data1_str;
        dset_data_ptr2=(int*)&data2;
        attr_data_ptr1=(int*)&data2;

        /* ----------- 
         * group2 
         */
        dset_data_ptr3=(int*)&data2;
        /* dset1/attr1 */
        tid_attr1=H5Tcopy(H5T_C_S1);
        H5Tset_size(tid_attr1, (size_t)STR_SIZE);
        attr_data_ptr2=(char*)&data1_str;

        /* dset1/attr2 */
        attr2_dim_ptr=(hsize_t*)&dims1_2;

        /* dset1/attr3 */
        attr_data_ptr3=(int*)&data1_dim2;
        attr3_dim_ptr=(hsize_t*)&dims2;
        rank_attr=2;

        /* dset1/attr4 */
        attr_data_ptr4=(int*)&data2;

    }


   /*-----------------------------------------------------------------------
    * Create file(s)
    *------------------------------------------------------------------------*/
    fid = H5Fcreate (fname, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    if (fid < 0)
    {
        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Groups
    *------------------------------------------------------------------------*/
    gid1 = H5Gcreate2(fid, "g1", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname);
        status = FAIL;
        goto out;
    }

    gid2 = H5Gcreate2(fid, "g2", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Datasets in /g1
    *------------------------------------------------------------------------*/
    if((sid1 = H5Screate_simple(1, dims1_1, NULL)) < 0)
         goto out;

    /*  dset1 */
    if((did1 = H5Dcreate2(gid1, "dset1", tid_dset1, sid1, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0)
    {
        fprintf(stderr, "Error: %s> H5Dcreate2 failed.\n", "dset1");
        status = FAIL;
        goto out;
    }

    if(H5Dwrite(did1, tid_dset1, H5S_ALL, H5S_ALL, H5P_DEFAULT, dset_data_ptr1) < 0)
    {
        fprintf(stderr, "Error: %s> H5Dwrite failed.\n", "dset1");
        status = FAIL;
        goto out;
    }
    write_attr(did1,1,dims1_1,"attr", H5T_NATIVE_INT, attr_data_ptr1);

    /*  dset2 */
    status = write_dset(gid1, 1, dims1_1,"dset2", H5T_NATIVE_INT, dset_data_ptr2);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname);
        goto out;
    }

    /*-----------------------------------------------------------------------
    * Datasets in /g2
    *------------------------------------------------------------------------*/
    /* ---------
     *  dset1 */
    if((did2 = H5Dcreate2(gid2, "dset1", H5T_NATIVE_INT, sid1, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0)
    {
        fprintf(stderr, "Error: %s> H5Dcreate2 failed.\n", "dset1");
        status = FAIL;
        goto out;
    }

    if(H5Dwrite(did2, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, dset_data_ptr3) < 0)
    {
        fprintf(stderr, "Error: %s> H5Dwrite failed.\n", "dset1");
        status = FAIL;
        goto out;
    }
    /* attr1 - non-compatible : different type */
    write_attr(did2,1,dims1_1,"attr1", tid_attr1, attr_data_ptr2);


    /* attr2 - non-compatible : same rank, different dimention */
    write_attr(did2,1, attr2_dim_ptr,"attr2", H5T_NATIVE_INT, data3);

    /* attr3 - non-compatible : different rank */
    write_attr(did2, rank_attr,attr3_dim_ptr,"attr3", H5T_NATIVE_INT, attr_data_ptr3);

    /* attr4 - compatible : different data values */
    write_attr(did2,1,dims1_1,"attr4", H5T_NATIVE_INT, attr_data_ptr4);

    /*----------
     * dset2 */
    status = write_dset(gid2, 1, dims1_1,"dset2", H5T_NATIVE_INT, dset_data_ptr3);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname);
        goto out;
    }

    

out:
    
    /*-----------------------------------------------------------------------
    * Close IDs
    *-----------------------------------------------------------------------*/
    if(fid)
        H5Fclose(fid);
    if(gid1)
        H5Gclose(gid1);
    if(gid2)
        H5Gclose(gid2);
    if(did1)
        H5Dclose(did1);
    if(did2)
        H5Dclose(did2);
    if(sid1)
        H5Sclose(sid1);
    if(tid_dset1)
        H5Tclose(tid_dset1);
    if(tid_attr1)
        H5Tclose(tid_attr1);
}

/*-------------------------------------------------------------------------
* Function: test_objs_nocomparables
*
* Purpose: 
*   Create test files with common objects (same name) but different object
*   types. 
*   h5diff should show non-comparable output from these common objects.
*-------------------------------------------------------------------------*/
static void test_objs_nocomparables(const char *fname1, const char *fname2)
{
    herr_t  status = SUCCEED;
    hid_t   fid1=0;
    hid_t   fid2=0;
    hid_t   topgid1=0;
    hid_t   topgid2=0;
    hid_t   gid1=0;
    hid_t   did1=0;
    hid_t   tid1=0;
    hid_t   gid2=0;
    hid_t   did2=0;
    hid_t   tid2=0;
    hsize_t dims[1] = {DIM_ARRY};
    int data1[DIM_ARRY] = {1,1,1};
    int data2[DIM_ARRY] = {2,2,2};

   /*-----------------------------------------------------------------------
    * Open file(s) to add objects
    *------------------------------------------------------------------------*/
    /* file1 */
    fid1 = H5Fopen (fname1, H5F_ACC_RDWR, H5P_DEFAULT);
    if (fid1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Fopen failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /* file2 */
    fid2 = H5Fopen (fname2, H5F_ACC_RDWR, H5P_DEFAULT);
    if (fid2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Fopen failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    /*-----------------------------------------------------------------------
    * in file1 : add member objects
    *------------------------------------------------------------------------*/
    /* parent group */
    topgid1 = H5Gcreate2(fid1, "diffobjtypes", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (topgid1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /* dataset */
    status = write_dset(topgid1, 1, dims,"obj1", H5T_NATIVE_INT, data1);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
        goto out;
    }

    /* group */
    gid1 = H5Gcreate2(topgid1, "obj2", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid1 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname1);
        status = FAIL;
        goto out;
    }

    /* committed type */
    tid1 = H5Tcopy(H5T_NATIVE_INT);
    status = H5Tcommit2(topgid1, "obj3", tid1, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Tcommit2 failed.\n", fname1);
        goto out;
    }

    /*-----------------------------------------------------------------------
    * in file2 : add member objects
    *------------------------------------------------------------------------*/
    /* parent group */
    topgid2 = H5Gcreate2(fid2, "diffobjtypes", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (topgid2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    /* group */
    gid2 = H5Gcreate2(topgid2, "obj1", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (gid2 < 0)
    {
        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname2);
        status = FAIL;
        goto out;
    }

    /* committed type */
    tid2 = H5Tcopy(H5T_NATIVE_INT);
    status = H5Tcommit2(topgid2, "obj2", tid2, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (status < 0)
    {
        fprintf(stderr, "Error: %s> H5Tcommit2 failed.\n", fname2);
        goto out;
    }

    /* dataset */
    status = write_dset(topgid2, 1, dims,"obj3", H5T_NATIVE_INT, data2);
    if (status == FAIL)
    {
        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
        goto out;
    }

out:
    /*-----------------------------------------------------------------------
    * Close IDs
    *-----------------------------------------------------------------------*/
    if(fid1)
        H5Fclose(fid1);
    if(fid2)
        H5Fclose(fid2);
    if(topgid1)
        H5Gclose(topgid1);
    if(topgid2)
        H5Gclose(topgid2);
    if(did1)
        H5Dclose(did1);
    if(did2)
        H5Dclose(did2);
    if(gid1)
        H5Gclose(gid1);
    if(gid2)
        H5Gclose(gid2);
    if(tid1)
        H5Tclose(tid1);
    if(tid2)
        H5Tclose(tid2);

}

/*-------------------------------------------------------------------------
* Function: write_attr_in
*
* Purpose: write attributes in LOC_ID (dataset, group, named datatype)
*
*-------------------------------------------------------------------------
*/
static
void write_attr_in(hid_t loc_id,
                   const char* dset_name, /* for saving reference to dataset*/
                   hid_t fid,
                   int make_diffs /* flag to modify data buffers */)
{
    /* Compound datatype */
    typedef struct s_t
    {
        char   a;
        double b;
    } s_t;

    typedef enum
    {
        RED,
        GREEN
    } e_t;

    hid_t   aid;
    hid_t   sid;
    hid_t   tid;
    herr_t  status;
    int     val, i, j, k, l, n;
    float   f;

    /* create 1D attributes with dimension [2], 2 elements */
    hsize_t    dims[1]={2};
    char       buf1[2][STR_SIZE]= {"ab","de"};        /* string */
    char       *buf1a[2];                             /* VL string */
    char       buf2[2]= {1,2};                 /* bitfield, opaque */
    s_t        buf3[2]= {{1,2},{3,4}};         /* compound */
    hobj_ref_t buf4[2];                        /* reference */
    e_t        buf45[2]= {RED,RED};            /* enum */
    hvl_t      buf5[2];                        /* vlen */
    hsize_t    dimarray[1]={3};                /* array dimension */
    int        buf6[2][3]= {{1,2,3},{4,5,6}};  /* array */
    int        buf7[2]= {1,2};                 /* integer */
    float      buf8[2]= {1,2};                 /* float */

    /* create 2D attributes with dimension [3][2], 6 elements */
    hsize_t    dims2[2]={3,2};
    char       buf12[3][2][STR_SIZE]= {{"ab","cd"},{"ef","gh"},{"ij","kl"}};     /* string */
    char       *buf12a[3][2];                                               /* VL string */
    char       buf22[3][2]= {{1,2},{3,4},{5,6}};                     /* bitfield, opaque */
    s_t        buf32[6]= {{1,2},{3,4},{5,6},{7,8},{9,10},{11,12}};   /* compound */
    hobj_ref_t buf42[3][2];                                          /* reference */
    e_t        buf452[3][2];                                         /* enum */
    hvl_t      buf52[3][2];                                          /* vlen */
    int        buf62[6][3]= {{1,2,3},{4,5,6},{7,8,9},{10,11,12},{13,14,15},{16,17,18}};  /* array */
    int        buf72[3][2]= {{1,2},{3,4},{5,6}};                     /* integer */
    float      buf82[3][2]= {{1,2},{3,4},{5,6}};                     /* float */

    /* create 3D attributes with dimension [4][3][2], 24 elements */
    hsize_t    dims3[3]={4,3,2};
    char       buf13[4][3][2][STR_SIZE]= {{{"ab","cd"},{"ef","gh"},{"ij","kl"}},
    {{"mn","pq"},{"rs","tu"},{"vw","xz"}},
    {{"AB","CD"},{"EF","GH"},{"IJ","KL"}},
    {{"MN","PQ"},{"RS","TU"},{"VW","XZ"}}};  /* string */
    char       *buf13a[4][3][2];   /* VL string */
    char       buf23[4][3][2];    /* bitfield, opaque */
    s_t        buf33[4][3][2];    /* compound */
    hobj_ref_t buf43[4][3][2];    /* reference */
    e_t        buf453[4][3][2];   /* enum */
    hvl_t      buf53[4][3][2];    /* vlen */
    int        buf63[24][3];      /* array */
    int        buf73[4][3][2];    /* integer */
    float      buf83[4][3][2];    /* float */


    /*-------------------------------------------------------------------------
    * 1D attributes
    *-------------------------------------------------------------------------
    */

    /*-------------------------------------------------------------------------
    * H5T_STRING
    *-------------------------------------------------------------------------
    */

    if (make_diffs)
    {
        for (i=0; i<2; i++)
        {
            for (j=0; j<2; j++)
            {
                buf1[i][j]='z';
            }
        }
    }
    /*
    buf1[2][2]= {"ab","de"};
    $h5diff file7.h5 file6.h5 g1 g1 -v
    Group:       </g1> and </g1>
    Attribute:   <string> and <string>
    position      string of </g1>  string of </g1> difference
    ------------------------------------------------------------
    [ 0 ]          a                z
    [ 0 ]          b                z
    [ 1 ]          d                z
    [ 1 ]          e                z
    */
    tid = H5Tcopy(H5T_C_S1);
    status  = H5Tset_size(tid, (size_t)STR_SIZE);
    write_attr(loc_id,1,dims,"string",tid,buf1);
    status = H5Tclose(tid);

    for (i=0; i<2; i++)
        buf1a[i]=buf1[i];
    tid = H5Tcopy(H5T_C_S1);
    status  = H5Tset_size(tid, H5T_VARIABLE);
    write_attr(loc_id,1,dims,"VLstring",tid,buf1a);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_BITFIELD
    *-------------------------------------------------------------------------
    */

    if (make_diffs)
    {
        for (i=0; i<2; i++)
            buf2[i]=buf2[1]=0;
    }
    /*
    buf2[2]= {1,2};
    $h5diff file7.h5 file6.h5 g1 g1 -v
    Group:       </g1> and </g1>
    Attribute:   <bitfield> and <bitfield>
    position      bitfield of </g1> bitfield of </g1> difference
    position        opaque of </g1> opaque of </g1> difference
    ------------------------------------------------------------
    [ 0 ]          1               0               1
    [ 1 ]          2               0               2
    */

    tid = H5Tcopy(H5T_STD_B8LE);
    write_attr(loc_id,1,dims,"bitfield",tid,buf2);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_OPAQUE
    *-------------------------------------------------------------------------
    */

    /*
    buf2[2]= {1,2};
    $h5diff file7.h5 file6.h5 g1 g1 -v
    Group:       </g1> and </g1>
    Attribute:   <opaque> and <opaque>
    position     opaque of </g1> opaque of </g1> difference
    position        opaque of </g1> opaque of </g1> difference
    ------------------------------------------------------------
    [ 0 ]          1               0               1
    [ 1 ]          2               0               2
    */

    tid = H5Tcreate(H5T_OPAQUE, (size_t)1);
    status = H5Tset_tag(tid, "1-byte opaque type"); /* must set this */
    write_attr(loc_id,1,dims,"opaque",tid,buf2);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_COMPOUND
    *-------------------------------------------------------------------------
    */

    if (make_diffs)
    {
        for (i=0; i<2; i++)
        {
            buf3[i].a=0; buf3[i].b=0;
        }
    }

    /*
    buf3[2]= {{1,2},{3,4}};
    $h5diff file7.h5 file6.h5 g1 g1 -v
    Group:       </g1> and </g1>
    Attribute:   <compound> and <compound>
    position        compound of </g1> compound of </g1> difference
    ------------------------------------------------------------
    [ 0 ]          1               5               4
    [ 0 ]          2               5               3
    [ 1 ]          3               5               2
    [ 1 ]          4               5               1
    */

    tid = H5Tcreate (H5T_COMPOUND, sizeof(s_t));
    H5Tinsert(tid, "a", HOFFSET(s_t, a), H5T_NATIVE_CHAR);
    H5Tinsert(tid, "b", HOFFSET(s_t, b), H5T_NATIVE_DOUBLE);
    write_attr(loc_id,1,dims,"compound",tid,buf3);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_REFERENCE (H5R_OBJECT object reference)
    *-------------------------------------------------------------------------
    */
    /* Create references to dataset */
    if (dset_name)
    {
        status=H5Rcreate(&buf4[0],fid,dset_name,H5R_OBJECT,(hid_t)-1);
        status=H5Rcreate(&buf4[1],fid,dset_name,H5R_OBJECT,(hid_t)-1);
        write_attr(loc_id,1,dims,"reference",H5T_STD_REF_OBJ,buf4);
    }

    /*-------------------------------------------------------------------------
    * H5T_ENUM
    *-------------------------------------------------------------------------
    */
    if (make_diffs)
    {
        for (i=0; i<2; i++)
        {
            buf45[i]=GREEN;
        }
    }
    /*
    buf45[2]= {RED,RED};
    $h5diff file7.h5 file6.h5 g1 g1 -v
    Group:       </g1> and </g1>
    Attribute:   <enum> and <enum>
    position     enum of </g1>   enum of </g1>   difference
    ------------------------------------------------------------
    [ 0 ]          RED              GREEN
    [ 1 ]          RED              GREEN
    */
    tid = H5Tcreate(H5T_ENUM, sizeof(e_t));
    H5Tenum_insert(tid, "RED",   (val = 0, &val));
    H5Tenum_insert(tid, "GREEN", (val = 1, &val));
    write_attr(loc_id,1,dims,"enum",tid,buf45);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_VLEN
    *-------------------------------------------------------------------------
    */

    /* Allocate and initialize VL dataset to write */

    buf5[0].len = 1;
    buf5[0].p = HDmalloc( 1 * sizeof(int));
    ((int *)buf5[0].p)[0]=1;
    buf5[1].len = 2;
    buf5[1].p = HDmalloc( 2 * sizeof(int));
    ((int *)buf5[1].p)[0]=2;
    ((int *)buf5[1].p)[1]=3;

    if (make_diffs)
    {
        ((int *)buf5[0].p)[0]=0;
        ((int *)buf5[1].p)[0]=0;
        ((int *)buf5[1].p)[1]=0;
    }
    /*
    $h5diff file7.h5 file6.h5 g1 g1 -v
    Group:       </g1> and </g1>
    position        vlen of </g1>   vlen of </g1>   difference
    ------------------------------------------------------------
    [ 0 ]          1               0               1
    [ 1 ]          2               0               2
    [ 1 ]          3               0               3
    */

    sid = H5Screate_simple(1, dims, NULL);
    tid = H5Tvlen_create(H5T_NATIVE_INT);
    aid = H5Acreate2(loc_id, "vlen", tid, sid, H5P_DEFAULT, H5P_DEFAULT);
    status = H5Awrite(aid, tid, buf5);
    assert(status >= 0);
    status = H5Dvlen_reclaim(tid, sid, H5P_DEFAULT, buf5);
    assert(status >= 0);
    status = H5Aclose(aid);
    status = H5Tclose(tid);
    status = H5Sclose(sid);

    /*-------------------------------------------------------------------------
    * H5T_ARRAY
    *-------------------------------------------------------------------------
    */

    if (make_diffs)
    {
        for (i=0; i<2; i++)
            for (j=0; j<3; j++)
            {
                buf6[i][j]=0;
            }
    }
    /*
    buf6[2][3]= {{1,2,3},{4,5,6}};
    $h5diff file7.h5 file6.h5 g1 g1 -v
    Group:       </g1> and </g1>
    Attribute:   <array> and <array>
    position        array of </g1>  array of </g1>  difference
    ------------------------------------------------------------
    [ 0 ]          1               0               1
    [ 0 ]          2               0               2
    [ 0 ]          3               0               3
    [ 1 ]          4               0               4
    [ 1 ]          5               0               5
    [ 1 ]          6               0               6
    */
    tid = H5Tarray_create2(H5T_NATIVE_INT, 1, dimarray);
    write_attr(loc_id, 1, dims, "array", tid, buf6);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_INTEGER and H5T_FLOAT
    *-------------------------------------------------------------------------
    */

    if (make_diffs)
    {
        for (i=0; i<2; i++)
        {
            buf7[i]=0;
            buf8[i]=0;
        }
    }
    /*
    buf7[2]= {1,2};
    buf8[2]= {1,2};
    $h5diff file7.h5 file6.h5 g1 g1 -v
    Group:       </g1> and </g1>
    position        integer of </g1> integer of </g1> difference
    ------------------------------------------------------------
    [ 0 ]          1               0               1
    [ 1 ]          2               0               2
    position        float of </g1>  float of </g1>  difference
    ------------------------------------------------------------
    [ 0 ]          1               0               1
    [ 1 ]          2               0               2
    */
    write_attr(loc_id,1,dims,"integer",H5T_NATIVE_INT,buf7);
    write_attr(loc_id,1,dims,"float",H5T_NATIVE_FLOAT,buf8);


    /*-------------------------------------------------------------------------
    * 2D attributes
    *-------------------------------------------------------------------------
    */

    /*-------------------------------------------------------------------------
    * H5T_STRING
    *-------------------------------------------------------------------------
    */
    if (make_diffs)
    {
        for (i=0; i<3; i++)
            for (j=0; j<2; j++)
                for (k=0; k<2; k++)
                    buf12[i][j][k]='z';
    }

    /*
    buf12[6][2]= {"ab","cd","ef","gh","ij","kl"};
    $h5diff file7.h5 file6.h5 g1 g1 -v
    Attribute:   <string2D> and <string2D>
    position        string2D of </g1> string2D of </g1> difference
    ------------------------------------------------------------
    [ 0 0 ]          a                z
    [ 0 0 ]          b                z
    [ 0 1 ]          c                z
    [ 0 1 ]          d                z
    [ 1 0 ]          e                z
    [ 1 0 ]          f                z
    [ 1 1 ]          g                z
    [ 1 1 ]          h                z
    [ 2 0 ]          i                z
    [ 2 0 ]          j                z
    [ 2 1 ]          k                z
    [ 2 1 ]          l                z
    */

    tid = H5Tcopy(H5T_C_S1);
    status  = H5Tset_size(tid, (size_t)STR_SIZE);
    write_attr(loc_id,2,dims2,"string2D",tid,buf12);
    status = H5Tclose(tid);

    for (i=0; i<3; i++)
    {
        for (j=0; j<2; j++)
        {

            buf12a[i][j]=buf12[i][j];
        }
    }
    tid = H5Tcopy(H5T_C_S1);
    status  = H5Tset_size(tid, H5T_VARIABLE);
    write_attr(loc_id,2,dims2,"VLstring2D",tid,buf12a);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_BITFIELD
    *-------------------------------------------------------------------------
    */

    if (make_diffs)
    {
        memset(buf22,0,sizeof buf22);
    }

    /*
    buf22[3][2]= {{1,2},{3,4},{5,6}};
    $h5diff file7.h5 file6.h5 g1 g1 -v
    Attribute:   <bitfield2D> and <bitfield2D>
    position        bitfield2D of </g1> bitfield2D of </g1> difference
    ------------------------------------------------------------
    [ 0 0 ]          1               0               1
    [ 0 1 ]          2               0               2
    [ 1 0 ]          3               0               3
    [ 1 1 ]          4               0               4
    [ 2 0 ]          5               0               5
    [ 2 1 ]          6               0               6
    */


    tid = H5Tcopy(H5T_STD_B8LE);
    write_attr(loc_id,2,dims2,"bitfield2D",tid,buf22);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_OPAQUE
    *-------------------------------------------------------------------------
    */

    /*
    buf22[3][2]= {{1,2},{3,4},{5,6}};
    $h5diff file7.h5 file6.h5 g1 g1 -v
    Attribute:   <opaque2D> and <opaque2D>
    position        opaque2D of </g1> opaque2D of </g1> difference
    ------------------------------------------------------------
    [ 0 0 ]          1               0               1
    [ 0 1 ]          2               0               2
    [ 1 0 ]          3               0               3
    [ 1 1 ]          4               0               4
    [ 2 0 ]          5               0               5
    [ 2 1 ]          6               0               6
    */
    tid = H5Tcreate(H5T_OPAQUE, (size_t)1);
    status = H5Tset_tag(tid, "1-byte opaque type"); /* must set this */
    write_attr(loc_id,2,dims2,"opaque2D",tid,buf22);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_COMPOUND
    *-------------------------------------------------------------------------
    */
    if (make_diffs)
    {
        memset(buf32,0,sizeof buf32);
    }

    /*
    buf32[6]= {{1,2},{3,4},{5,6},{7,8},{9,10},{11,12}};
    $h5diff file7.h5 file6.h5 g1 g1 -v
    Attribute:   <opaque2D> and <opaque2D>
    position        opaque2D of </g1> opaque2D of </g1> difference
    ------------------------------------------------------------
    [ 0 0 ]          1               0               1
    [ 0 1 ]          2               0               2
    [ 1 0 ]          3               0               3
    [ 1 1 ]          4               0               4
    [ 2 0 ]          5               0               5
    [ 2 1 ]          6               0               6
    */


    tid = H5Tcreate (H5T_COMPOUND, sizeof(s_t));
    H5Tinsert(tid, "a", HOFFSET(s_t, a), H5T_NATIVE_CHAR);
    H5Tinsert(tid, "b", HOFFSET(s_t, b), H5T_NATIVE_DOUBLE);
    write_attr(loc_id,2,dims2,"compound2D",tid,buf32);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_REFERENCE (H5R_OBJECT object reference)
    *-------------------------------------------------------------------------
    */
    /* Create references to dataset */
    if (dset_name)
    {
        for (i = 0; i < 3; i++) {
            for (j = 0; j < 2; j++) {
                status=H5Rcreate(&buf42[i][j],fid,dset_name,H5R_OBJECT,(hid_t)-1);
            }
        }
        write_attr(loc_id,2,dims2,"reference2D",H5T_STD_REF_OBJ,buf42);
    }

    /*-------------------------------------------------------------------------
    * H5T_ENUM
    *-------------------------------------------------------------------------
    */
    for (i=0; i<3; i++)
    {
        for (j=0; j<2; j++)
        {
            if (make_diffs) buf452[i][j]=GREEN; else buf452[i][j]=RED;
        }
    }

    /*
    Attribute:   <enum2D> and <enum2D>
    position        enum2D of </g1> enum2D of </g1> difference
    ------------------------------------------------------------
    [ 0 0 ]          RED              GREEN
    [ 0 1 ]          RED              GREEN
    [ 1 0 ]          RED              GREEN
    [ 1 1 ]          RED              GREEN
    [ 2 0 ]          RED              GREEN
    [ 2 1 ]          RED              GREEN
    */

    tid = H5Tcreate(H5T_ENUM, sizeof(e_t));
    H5Tenum_insert(tid, "RED",   (val = 0, &val));
    H5Tenum_insert(tid, "GREEN", (val = 1, &val));
    write_attr(loc_id,2,dims2,"enum2D",tid,buf452);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_VLEN
    *-------------------------------------------------------------------------
    */

    /* Allocate and initialize VL dataset to write */
    n=0;
    for (i = 0; i < 3; i++) {
        for (j = 0; j < 2; j++) {
            buf52[i][j].p = HDmalloc((i + 1) * sizeof(int));
            buf52[i][j].len = i + 1;
            for (l = 0; l < i + 1; l++)
                if (make_diffs)((int *)buf52[i][j].p)[l] = 0;
                else ((int *)buf52[i][j].p)[l] = n++;
        }
    }

    /*
    position        vlen2D of </g1> vlen2D of </g1> difference
    ------------------------------------------------------------
    [ 0 1 ]          1               0               1
    [ 1 0 ]          2               0               2
    [ 1 0 ]          3               0               3
    [ 1 1 ]          4               0               4
    [ 1 1 ]          5               0               5
    [ 2 0 ]          6               0               6
    [ 2 0 ]          7               0               7
    [ 2 0 ]          8               0               8
    [ 2 1 ]          9               0               9
    [ 2 1 ]          10              0               10
    [ 2 1 ]          11              0               11
    */

    sid = H5Screate_simple(2, dims2, NULL);
    tid = H5Tvlen_create(H5T_NATIVE_INT);
    aid = H5Acreate2(loc_id, "vlen2D", tid, sid, H5P_DEFAULT, H5P_DEFAULT);
    status = H5Awrite(aid, tid, buf52);
    assert(status >= 0);
    status = H5Dvlen_reclaim(tid, sid, H5P_DEFAULT, buf52);
    assert(status >= 0);
    status = H5Aclose(aid);
    status = H5Tclose(tid);
    status = H5Sclose(sid);

    /*-------------------------------------------------------------------------
    * H5T_ARRAY
    *-------------------------------------------------------------------------
    */

    if (make_diffs)
    {
        memset(buf62,0,sizeof buf62);
    }
    /*
    buf62[6][3]= {{1,2,3},{4,5,6},{7,8,9},{10,11,12},{13,14,15},{16,17,18}};
    $h5diff file7.h5 file6.h5 g1 g1 -v
    Group:       </g1> and </g1>
    Attribute:   <array2D> and <array2D>
    position        array2D of </g1> array2D of </g1> difference
    ------------------------------------------------------------
    [ 0 0 ]          1               0               1
    [ 0 0 ]          2               0               2
    [ 0 0 ]          3               0               3
    [ 0 1 ]          4               0               4
    [ 0 1 ]          5               0               5
    [ 0 1 ]          6               0               6
    [ 1 0 ]          7               0               7
    [ 1 0 ]          8               0               8
    [ 1 0 ]          9               0               9
    [ 1 1 ]          10              0               10
    [ 1 1 ]          11              0               11
    [ 1 1 ]          12              0               12
    [ 2 0 ]          13              0               13
    [ 2 0 ]          14              0               14
    [ 2 0 ]          15              0               15
    [ 2 1 ]          16              0               16
    [ 2 1 ]          17              0               17
    [ 2 1 ]          18              0               18
    */
    tid = H5Tarray_create2(H5T_NATIVE_INT, 1, dimarray);
    write_attr(loc_id, 2, dims2, "array2D", tid, buf62);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_INTEGER and H5T_FLOAT
    *-------------------------------------------------------------------------
    */

    if (make_diffs)
    {
        memset(buf72,0,sizeof buf72);
        memset(buf82,0,sizeof buf82);
    }
    /*
    Attribute:   <integer2D> and <integer2D>
    position        integer2D of </g1> integer2D of </g1> difference
    ------------------------------------------------------------
    [ 0 0 ]          1               0               1
    [ 0 1 ]          2               0               2
    [ 1 0 ]          3               0               3
    [ 1 1 ]          4               0               4
    [ 2 0 ]          5               0               5
    [ 2 1 ]          6               0               6
    6 differences found
    Attribute:   <float2D> and <float2D>
    position        float2D of </g1> float2D of </g1> difference
    ------------------------------------------------------------
    [ 0 0 ]          1               0               1
    [ 0 1 ]          2               0               2
    [ 1 0 ]          3               0               3
    [ 1 1 ]          4               0               4
    [ 2 0 ]          5               0               5
    [ 2 1 ]          6               0               6
    */

    write_attr(loc_id,2,dims2,"integer2D",H5T_NATIVE_INT,buf72);
    write_attr(loc_id,2,dims2,"float2D",H5T_NATIVE_FLOAT,buf82);


    /*-------------------------------------------------------------------------
    * 3D attributes
    *-------------------------------------------------------------------------
    */

    /*-------------------------------------------------------------------------
    * H5T_STRING
    *-------------------------------------------------------------------------
    */

    if (make_diffs)
    {
        for (i=0; i<4; i++)
            for (j=0; j<3; j++)
                for (k=0; k<2; k++)
                    for (l=0; l<2; l++)
                        buf13[i][j][k][l]='z';
    }

    /*
    buf13[24][2]= {"ab","cd","ef","gh","ij","kl","mn","pq",
    "rs","tu","vw","xz","AB","CD","EF","GH",
    "IJ","KL","MN","PQ","RS","TU","VW","XZ"};

    Attribute:   <string3D> and <string3D>
    position        string3D of </g1> string3D of </g1> difference
    ------------------------------------------------------------
    [ 0 0 0 ]          a                z
    [ 0 0 0 ]          b                z
    [ 0 0 1 ]          c                z
    [ 0 0 1 ]          d                z
    [ 0 1 0 ]          e                z
    [ 0 1 0 ]          f                z
    [ 0 1 1 ]          g                z
    [ 0 1 1 ]          h                z
    [ 0 2 0 ]          i                z
    [ 0 2 0 ]          j                z
    [ 0 2 1 ]          k                z
    [ 0 2 1 ]          l                z
    [ 1 0 0 ]          m                z
    [ 1 0 0 ]          n                z
    [ 1 0 1 ]          p                z
    [ 1 0 1 ]          q                z
    [ 1 1 0 ]          r                z
    [ 1 1 0 ]          s                z
    [ 1 1 1 ]          t                z
    [ 1 1 1 ]          u                z
    [ 1 2 0 ]          v                z
    [ 1 2 0 ]          w                z
    [ 1 2 1 ]          x                z
    [ 2 0 0 ]          A                z
    [ 2 0 0 ]          B                z
    [ 2 0 1 ]          C                z
    [ 2 0 1 ]          D                z
    [ 2 1 0 ]          E                z
    [ 2 1 0 ]          F                z
    [ 2 1 1 ]          G                z
    [ 2 1 1 ]          H                z
    [ 2 2 0 ]          I                z
    [ 2 2 0 ]          J                z
    [ 2 2 1 ]          K                z
    [ 2 2 1 ]          L                z
    [ 3 0 0 ]          M                z
    [ 3 0 0 ]          N                z
    [ 3 0 1 ]          P                z
    [ 3 0 1 ]          Q                z
    [ 3 1 0 ]          R                z
    [ 3 1 0 ]          S                z
    [ 3 1 1 ]          T                z
    [ 3 1 1 ]          U                z
    [ 3 2 0 ]          V                z
    [ 3 2 0 ]          W                z
    [ 3 2 1 ]          X                z
    [ 3 2 1 ]          Z                z
    */

    tid = H5Tcopy(H5T_C_S1);
    status  = H5Tset_size(tid, (size_t)STR_SIZE);
    write_attr(loc_id,3,dims3,"string3D",tid,buf13);
    status = H5Tclose(tid);

    for (i=0; i<4; i++)
    {
        for (j=0; j<3; j++)
        {
            for (k=0; k<2; k++)
            {
                buf13a[i][j][k]=buf13[i][j][k];
            }
        }
    }
    tid = H5Tcopy(H5T_C_S1);
    status  = H5Tset_size(tid, H5T_VARIABLE);
    write_attr(loc_id,3,dims3,"VLstring3D",tid,buf13a);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_BITFIELD
    *-------------------------------------------------------------------------
    */

    n=1;
    for (i = 0; i < 4; i++) {
        for (j = 0; j < 3; j++) {
            for (k = 0; k < 2; k++) {
                if (make_diffs) buf23[i][j][k]=0;
                else buf23[i][j][k]=n++;
            }
        }
    }

    /*
    position        bitfield3D of </g1> bitfield3D of </g1> difference
    ------------------------------------------------------------
    [ 0 0 0 ]          1               0               1
    [ 0 0 1 ]          2               0               2
    [ 0 1 0 ]          3               0               3
    [ 0 1 1 ]          4               0               4
    [ 0 2 0 ]          5               0               5
    [ 0 2 1 ]          6               0               6
    [ 1 0 0 ]          7               0               7
    [ 1 0 1 ]          8               0               8
    [ 1 1 0 ]          9               0               9
    [ 1 1 1 ]          10              0               10
    [ 1 2 0 ]          11              0               11
    [ 1 2 1 ]          12              0               12
    [ 2 0 0 ]          13              0               13
    [ 2 0 1 ]          14              0               14
    [ 2 1 0 ]          15              0               15
    [ 2 1 1 ]          16              0               16
    [ 2 2 0 ]          17              0               17
    [ 2 2 1 ]          18              0               18
    [ 3 0 0 ]          19              0               19
    [ 3 0 1 ]          20              0               20
    [ 3 1 0 ]          21              0               21
    [ 3 1 1 ]          22              0               22
    [ 3 2 0 ]          23              0               23
    [ 3 2 1 ]          24              0               24
    */

    tid = H5Tcopy(H5T_STD_B8LE);
    write_attr(loc_id,3,dims3,"bitfield3D",tid,buf23);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_OPAQUE
    *-------------------------------------------------------------------------
    */
    tid = H5Tcreate(H5T_OPAQUE, (size_t)1);
    status = H5Tset_tag(tid, "1-byte opaque type"); /* must set this */
    write_attr(loc_id,3,dims3,"opaque3D",tid,buf23);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_COMPOUND
    *-------------------------------------------------------------------------
    */

    n=1;
    for (i = 0; i < 4; i++) {
        for (j = 0; j < 3; j++) {
            for (k = 0; k < 2; k++) {
                if (make_diffs) {
                    buf33[i][j][k].a=0;
                    buf33[i][j][k].b=0;
                }
                else {
                    buf33[i][j][k].a=n++;
                    buf33[i][j][k].b=n++;
                }
            }
        }
    }
    /*position        compound3D of </g1> compound3D of </g1> difference
    ------------------------------------------------------------
    [ 0 0 0 ]          1               0               1
    [ 0 0 0 ]          2               0               2
    [ 0 0 1 ]          3               0               3
    [ 0 0 1 ]          4               0               4
    [ 0 1 0 ]          5               0               5
    [ 0 1 0 ]          6               0               6
    [ 0 1 1 ]          7               0               7
    [ 0 1 1 ]          8               0               8
    [ 0 2 0 ]          9               0               9
    [ 0 2 0 ]          10              0               10
    [ 0 2 1 ]          11              0               11
    [ 0 2 1 ]          12              0               12
    [ 1 0 0 ]          13              0               13
    [ 1 0 0 ]          14              0               14
    [ 1 0 1 ]          15              0               15
    [ 1 0 1 ]          16              0               16
    [ 1 1 0 ]          17              0               17
    [ 1 1 0 ]          18              0               18
    [ 1 1 1 ]          19              0               19
    [ 1 1 1 ]          20              0               20
    [ 1 2 0 ]          21              0               21
    [ 1 2 0 ]          22              0               22
    [ 1 2 1 ]          23              0               23
    [ 1 2 1 ]          24              0               24
    [ 2 0 0 ]          25              0               25
    [ 2 0 0 ]          26              0               26
    [ 2 0 1 ]          27              0               27
    [ 2 0 1 ]          28              0               28
    [ 2 1 0 ]          29              0               29
    [ 2 1 0 ]          30              0               30
    [ 2 1 1 ]          31              0               31
    [ 2 1 1 ]          32              0               32
    [ 2 2 0 ]          33              0               33
    [ 2 2 0 ]          34              0               34
    [ 2 2 1 ]          35              0               35
    [ 2 2 1 ]          36              0               36
    [ 3 0 0 ]          37              0               37
    [ 3 0 0 ]          38              0               38
    [ 3 0 1 ]          39              0               39
    [ 3 0 1 ]          40              0               40
    [ 3 1 0 ]          41              0               41
    [ 3 1 0 ]          42              0               42
    [ 3 1 1 ]          43              0               43
    [ 3 1 1 ]          44              0               44
    [ 3 2 0 ]          45              0               45
    [ 3 2 0 ]          46              0               46
    [ 3 2 1 ]          47              0               47
    [ 3 2 1 ]          48              0               48
    */

    tid = H5Tcreate (H5T_COMPOUND, sizeof(s_t));
    H5Tinsert(tid, "a", HOFFSET(s_t, a), H5T_NATIVE_CHAR);
    H5Tinsert(tid, "b", HOFFSET(s_t, b), H5T_NATIVE_DOUBLE);
    write_attr(loc_id,3,dims3,"compound3D",tid,buf33);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_REFERENCE (H5R_OBJECT object reference)
    *-------------------------------------------------------------------------
    */
    /* Create references to dataset */
    if (dset_name)
    {
        for (i = 0; i < 4; i++) {
            for (j = 0; j < 3; j++) {
                for (k = 0; k < 2; k++)
                    status=H5Rcreate(&buf43[i][j][k],fid,dset_name,H5R_OBJECT,(hid_t)-1);
            }
        }
        write_attr(loc_id,3,dims3,"reference3D",H5T_STD_REF_OBJ,buf43);
    }

    /*-------------------------------------------------------------------------
    * H5T_ENUM
    *-------------------------------------------------------------------------
    */

    for (i = 0; i < 4; i++) {
        for (j = 0; j < 3; j++) {
            for (k = 0; k < 2; k++) {
                if (make_diffs) buf453[i][j][k]=RED; else buf453[i][j][k]=GREEN;
            }
        }
    }

    /*
    position        enum3D of </g1> enum3D of </g1> difference
    ------------------------------------------------------------
    [ 0 0 0 ]          GREEN            RED
    [ 0 0 1 ]          GREEN            RED
    [ 0 1 0 ]          GREEN            RED
    [ 0 1 1 ]          GREEN            RED
    [ 0 2 0 ]          GREEN            RED
    [ 0 2 1 ]          GREEN            RED
    [ 1 0 0 ]          GREEN            RED
    [ 1 0 1 ]          GREEN            RED
    [ 1 1 0 ]          GREEN            RED
    [ 1 1 1 ]          GREEN            RED
    [ 1 2 0 ]          GREEN            RED
    [ 1 2 1 ]          GREEN            RED
    [ 2 0 0 ]          GREEN            RED
    [ 2 0 1 ]          GREEN            RED
    [ 2 1 0 ]          GREEN            RED
    [ 2 1 1 ]          GREEN            RED
    [ 2 2 0 ]          GREEN            RED
    [ 2 2 1 ]          GREEN            RED
    [ 3 0 0 ]          GREEN            RED
    [ 3 0 1 ]          GREEN            RED
    [ 3 1 0 ]          GREEN            RED
    [ 3 1 1 ]          GREEN            RED
    [ 3 2 0 ]          GREEN            RED
    [ 3 2 1 ]          GREEN            RED
    */


    tid = H5Tcreate(H5T_ENUM, sizeof(e_t));
    H5Tenum_insert(tid, "RED",   (val = 0, &val));
    H5Tenum_insert(tid, "GREEN", (val = 1, &val));
    write_attr(loc_id,3,dims3,"enum3D",tid,buf453);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_VLEN
    *-------------------------------------------------------------------------
    */

    /* Allocate and initialize VL dataset to write */
    n=0;
    for (i = 0; i < 4; i++) {
        for (j = 0; j < 3; j++) {
            for (k = 0; k < 2; k++) {
                buf53[i][j][k].p = HDmalloc((i + 1) * sizeof(int));
                buf53[i][j][k].len = i + 1;
                for (l = 0; l < i + 1; l++)
                    if (make_diffs)((int *)buf53[i][j][k].p)[l] = 0;
                    else ((int *)buf53[i][j][k].p)[l] = n++;
            }
        }
    }
    /*
    position        vlen3D of </g1> vlen3D of </g1> difference
    ------------------------------------------------------------
    [ 0 0 1 ]          1               0               1
    [ 0 1 0 ]          2               0               2
    [ 0 1 1 ]          3               0               3
    [ 0 2 0 ]          4               0               4
    [ 0 2 1 ]          5               0               5
    [ 1 0 0 ]          6               0               6
    [ 1 0 0 ]          7               0               7
    [ 1 0 1 ]          8               0               8
    [ 1 0 1 ]          9               0               9
    [ 1 1 0 ]          10              0               10
    etc
    */
    sid = H5Screate_simple(3, dims3, NULL);
    tid = H5Tvlen_create(H5T_NATIVE_INT);
    aid = H5Acreate2(loc_id, "vlen3D", tid, sid, H5P_DEFAULT, H5P_DEFAULT);
    status = H5Awrite(aid, tid, buf53);
    assert(status >= 0);
    status = H5Dvlen_reclaim(tid, sid, H5P_DEFAULT, buf53);
    assert(status >= 0);
    status = H5Aclose(aid);
    status = H5Tclose(tid);
    status = H5Sclose(sid);

    /*-------------------------------------------------------------------------
    * H5T_ARRAY
    *-------------------------------------------------------------------------
    */
    n=1;
    for (i = 0; i < 24; i++) {
        for (j = 0; j < (int)dimarray[0]; j++) {
            if (make_diffs) buf63[i][j]=0;
            else buf63[i][j]=n++;
        }
    }
    /*
    position        array3D of </g1> array3D of </g1> difference
    ------------------------------------------------------------
    [ 0 0 0 ]          1               0               1
    [ 0 0 0 ]          2               0               2
    [ 0 0 0 ]          3               0               3
    [ 0 0 1 ]          4               0               4
    [ 0 0 1 ]          5               0               5
    [ 0 0 1 ]          6               0               6
    [ 0 1 0 ]          7               0               7
    etc
    */

    tid = H5Tarray_create2(H5T_NATIVE_INT, 1, dimarray);
    write_attr(loc_id, 3, dims3, "array3D", tid, buf63);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_INTEGER and H5T_FLOAT
    *-------------------------------------------------------------------------
    */
    n=1; f=1;
    for (i = 0; i < 4; i++) {
        for (j = 0; j < 3; j++) {
            for (k = 0; k < 2; k++) {
                if (make_diffs) {
                    buf73[i][j][k]=0;
                    buf83[i][j][k]=0;
                }
                else {
                    buf73[i][j][k]=n++;
                    buf83[i][j][k]=f++;
                }
            }
        }
    }

    /*
    position        integer3D of </g1> integer3D of </g1> difference
    ------------------------------------------------------------
    [ 0 0 0 ]          1               0               1
    [ 0 0 1 ]          2               0               2
    [ 0 1 0 ]          3               0               3
    [ 0 1 1 ]          4               0               4
    [ 0 2 0 ]          5               0               5
    [ 0 2 1 ]          6               0               6
    [ 1 0 0 ]          7               0               7
    [ 1 0 1 ]          8               0               8
    [ 1 1 0 ]          9               0               9
    [ 1 1 1 ]          10              0               10
    etc
    */
    write_attr(loc_id,3,dims3,"integer3D",H5T_NATIVE_INT,buf73);
    write_attr(loc_id,3,dims3,"float3D",H5T_NATIVE_FLOAT,buf83);
}



/*-------------------------------------------------------------------------
* Function: write_dset_in
*
* Purpose: write datasets in LOC_ID
*
*-------------------------------------------------------------------------
*/
static
void write_dset_in(hid_t loc_id,
                   const char* dset_name, /* for saving reference to dataset*/
                   hid_t fid,
                   int make_diffs /* flag to modify data buffers */)
{
    /* Compound datatype */
    typedef struct s_t
    {
        char   a;
        double b;
    } s_t;

    typedef enum
    {
        RED,
        GREEN
    } e_t;

    hid_t   did;
    hid_t   sid;
    hid_t   tid;
    hid_t   dcpl;
    herr_t  status;
    int     val, i, j, k, l, n;
    float   f;
    int     fillvalue=2;
    int     scalar_data = 2;

    /* create 1D attributes with dimension [2], 2 elements */
    hsize_t    dims[1]={2};
    char       buf1[2][STR_SIZE]= {"ab","de"}; /* string */
    char       *buf1a[2];                      /* VL string */
    char       buf2[2]= {1,2};                 /* bitfield, opaque */
    s_t        buf3[2]= {{1,2},{3,4}};         /* compound */
    hobj_ref_t buf4[2];                        /* reference */
    e_t        buf45[2]= {RED,GREEN};          /* enum */
    hvl_t      buf5[2];                        /* vlen */
    hsize_t    dimarray[1]={3};                /* array dimension */
    int        buf6[2][3]= {{1,2,3},{4,5,6}};  /* array */
    int        buf7[2]= {1,2};                 /* integer */
    float      buf8[2]= {1,2};                 /* float */

    /* create 2D attributes with dimension [3][2], 6 elements */
    hsize_t    dims2[2]={3,2};
    char       buf12[3][2][STR_SIZE]= {{"ab","cd"},{"ef","gh"},{"ij","kl"}};     /* string */
    char       *buf12a[3][2];                                        /* VL string */
    char       buf22[3][2]= {{1,2},{3,4},{5,6}};                     /* bitfield, opaque */
    s_t        buf32[6]= {{1,2},{3,4},{5,6},{7,8},{9,10},{11,12}};   /* compound */
    hobj_ref_t buf42[3][2];                                          /* reference */
    hvl_t      buf52[3][2];                                          /* vlen */
    int        buf62[6][3]= {{1,2,3},{4,5,6},{7,8,9},{10,11,12},{13,14,15},{16,17,18}};  /* array */
    int        buf72[3][2]= {{1,2},{3,4},{5,6}};                     /* integer */
    float      buf82[3][2]= {{1,2},{3,4},{5,6}};                     /* float */

    /* create 3D attributes with dimension [4][3][2], 24 elements */
    hsize_t    dims3[3]={4,3,2};
    char       buf13[4][3][2][STR_SIZE]= {{{"ab","cd"},{"ef","gh"},{"ij","kl"}},
    {{"mn","pq"},{"rs","tu"},{"vw","xz"}},
    {{"AB","CD"},{"EF","GH"},{"IJ","KL"}},
    {{"MN","PQ"},{"RS","TU"},{"VW","XZ"}}};  /* string */
    char       *buf13a[4][3][2];  /* VL string */
    char       buf23[4][3][2];    /* bitfield, opaque */
    s_t        buf33[4][3][2];    /* compound */
    hobj_ref_t buf43[4][3][2];    /* reference */
    hvl_t      buf53[4][3][2];    /* vlen */
    int        buf63[24][3];      /* array */
    int        buf73[4][3][2];    /* integer */
    float      buf83[4][3][2];    /* float */


    /*-------------------------------------------------------------------------
    * H5S_SCALAR
    *-------------------------------------------------------------------------
    */



    if ( make_diffs )
    {

        scalar_data = 1;
    }

    /* create a space  */
    sid = H5Screate(H5S_SCALAR);

    /* create a dataset */
    did = H5Dcreate2(loc_id, "scalar", H5T_NATIVE_INT, sid, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);

    /* write */
    H5Dwrite(did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, &scalar_data);

    /* close */
    H5Dclose(did);
    H5Sclose(sid);


    /*-------------------------------------------------------------------------
    * 1D
    *-------------------------------------------------------------------------
    */

    /*-------------------------------------------------------------------------
    * H5T_STRING
    *-------------------------------------------------------------------------
    */


    if (make_diffs)
    {
        for (i=0; i<2; i++)
            for (j=0; j<2; j++)
                buf1[i][j]='z';
    }


    tid = H5Tcopy(H5T_C_S1);
    status  = H5Tset_size(tid,(size_t)STR_SIZE);
    write_dset(loc_id,1,dims,"string",tid,buf1);
    status = H5Tclose(tid);

    for (i=0; i<2; i++)
    {
        buf1a[i]=buf1[i];
    }
    tid = H5Tcopy(H5T_C_S1);
    status  = H5Tset_size(tid, H5T_VARIABLE);
    write_dset(loc_id,1,dims,"VLstring",tid,buf1a);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_BITFIELD
    *-------------------------------------------------------------------------
    */

    if (make_diffs)
    {
        for (i=0; i<2; i++)
            buf2[i]=buf2[1]=0;
    }

    tid = H5Tcopy(H5T_STD_B8LE);
    write_dset(loc_id,1,dims,"bitfield",tid,buf2);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_OPAQUE
    *-------------------------------------------------------------------------
    */

    if (make_diffs)
    {
        for (i=0; i<2; i++)
        {
            buf3[i].a=0; buf3[i].b=0;
        }
    }

    tid = H5Tcreate(H5T_OPAQUE, (size_t)1);
    status = H5Tset_tag(tid, "1-byte opaque type"); /* must set this */
    write_dset(loc_id,1,dims,"opaque",tid,buf2);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_COMPOUND
    *-------------------------------------------------------------------------
    */


    if (make_diffs)
    {
        for (i=0; i<2; i++)
        {
            buf45[i]=GREEN;
        }
    }

    tid = H5Tcreate (H5T_COMPOUND, sizeof(s_t));
    H5Tinsert(tid, "a", HOFFSET(s_t, a), H5T_NATIVE_CHAR);
    H5Tinsert(tid, "b", HOFFSET(s_t, b), H5T_NATIVE_DOUBLE);
    write_dset(loc_id,1,dims,"compound",tid,buf3);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_REFERENCE (H5R_OBJECT object reference)
    *-------------------------------------------------------------------------
    */
    /* Create references to dataset */
    if (dset_name)
    {
        status=H5Rcreate(&buf4[0],fid,dset_name,H5R_OBJECT,(hid_t)-1);
        status=H5Rcreate(&buf4[1],fid,dset_name,H5R_OBJECT,(hid_t)-1);
        write_dset(loc_id,1,dims,"reference",H5T_STD_REF_OBJ,buf4);
    }

    /*-------------------------------------------------------------------------
    * H5T_REFERENCE (H5R_DATASET_REGION dataset region reference)
    *-------------------------------------------------------------------------
    */

    gen_datareg(fid,make_diffs);

    /*-------------------------------------------------------------------------
    * H5T_ENUM
    *-------------------------------------------------------------------------
    */
    tid = H5Tcreate(H5T_ENUM, sizeof(e_t));
    H5Tenum_insert(tid, "RED",   (val = 0, &val));
    H5Tenum_insert(tid, "GREEN", (val = 1, &val));
    write_dset(loc_id,1,dims,"enum",tid,buf45);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_VLEN
    *-------------------------------------------------------------------------
    */

    /* Allocate and initialize VL dataset to write */

    buf5[0].len = 1;
    buf5[0].p = HDmalloc( 1 * sizeof(int));
    ((int *)buf5[0].p)[0]=1;
    buf5[1].len = 2;
    buf5[1].p = HDmalloc( 2 * sizeof(int));
    ((int *)buf5[1].p)[0]=2;
    ((int *)buf5[1].p)[1]=3;

    if(make_diffs) {
        ((int *)buf5[0].p)[0] = 0;
        ((int *)buf5[1].p)[0] = 0;
        ((int *)buf5[1].p)[1]=0;
    }

    sid = H5Screate_simple(1, dims, NULL);
    tid = H5Tvlen_create(H5T_NATIVE_INT);
    did = H5Dcreate2(loc_id, "vlen", tid, sid, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    status = H5Dwrite(did, tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf5);
    HDassert(status >= 0);
    status = H5Dvlen_reclaim(tid, sid, H5P_DEFAULT, buf5);
    HDassert(status >= 0);
    status = H5Dclose(did);
    status = H5Tclose(tid);
    status = H5Sclose(sid);

    /*-------------------------------------------------------------------------
    * H5T_ARRAY
    *-------------------------------------------------------------------------
    */

    if (make_diffs)
    {
        for (i=0; i<2; i++)
            for (j=0; j<3; j++)
            {
                buf6[i][j]=0;
            }
    }

    tid = H5Tarray_create2(H5T_NATIVE_INT, 1, dimarray);
    write_dset(loc_id, 1, dims, "array", tid, buf6);
    status = H5Tclose(tid);

    {

        double  *dbuf;                           /* information to write */
        hid_t   did;                             /* dataset ID   */
        hid_t   sid;                             /* dataspace ID   */
        hid_t   tid;                             /* datatype ID   */
        size_t  size;
        hsize_t sdims[] = {1};
        hsize_t tdims[] = {H5TOOLS_MALLOCSIZE / sizeof(double) + 1};
        int     j;

        /* allocate and initialize array data to write */
        size = ( H5TOOLS_MALLOCSIZE / sizeof(double) + 1 ) * sizeof(double);
        dbuf = HDmalloc( size );

        for( j = 0; j < H5TOOLS_MALLOCSIZE / sizeof(double) + 1; j++)
            dbuf[j] = j;

        if (make_diffs)
        {
            dbuf[5] = 0;
            dbuf[6] = 0;
        }

        /* create a type larger than H5TOOLS_MALLOCSIZE */
        tid = H5Tarray_create2(H5T_NATIVE_DOUBLE, 1, tdims);
        size = H5Tget_size(tid);
        sid = H5Screate_simple(1, sdims, NULL);
        did = H5Dcreate2(loc_id, "arrayd", tid, sid, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
#if defined(WRITE_ARRAY)
        H5Dwrite(did, tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, dbuf);
#endif

        /* close */
        H5Dclose(did);
        H5Tclose(tid);
        H5Sclose(sid);
        HDfree( dbuf );
    }

    /*-------------------------------------------------------------------------
    * H5T_INTEGER and H5T_FLOAT
    *-------------------------------------------------------------------------
    */

    if (make_diffs)
    {
        for (i=0; i<2; i++)
        {
            buf7[i]=0;
            buf8[i]=0;
        }
    }

    write_dset(loc_id,1,dims,"integer",H5T_NATIVE_INT,buf7);
    write_dset(loc_id,1,dims,"float",H5T_NATIVE_FLOAT,buf8);


    /*-------------------------------------------------------------------------
    * 2D
    *-------------------------------------------------------------------------
    */

    /*-------------------------------------------------------------------------
    * H5T_STRING
    *-------------------------------------------------------------------------
    */

    if (make_diffs)
    {
        for (i=0; i<3; i++)
            for (j=0; j<2; j++)
                for (k=0; k<2; k++)
                    buf12[i][j][k]='z';
    }


    tid = H5Tcopy(H5T_C_S1);
    status  = H5Tset_size(tid,(size_t)STR_SIZE);
    write_dset(loc_id,2,dims2,"string2D",tid,buf12);
    status = H5Tclose(tid);

    for (i=0; i<3; i++)
    {
        for (j=0; j<2; j++)
        {
            buf12a[i][j]=buf12[i][j];
        }
    }
    tid = H5Tcopy(H5T_C_S1);
    status  = H5Tset_size(tid, H5T_VARIABLE);
    write_dset(loc_id,2,dims2,"VLstring2D",tid,buf12a);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_BITFIELD
    *-------------------------------------------------------------------------
    */


    if (make_diffs)
    {
        memset(buf22,0,sizeof buf22);
    }

    tid = H5Tcopy(H5T_STD_B8LE);
    write_dset(loc_id,2,dims2,"bitfield2D",tid,buf22);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_OPAQUE
    *-------------------------------------------------------------------------
    */
    tid = H5Tcreate(H5T_OPAQUE, (size_t)1);
    status = H5Tset_tag(tid, "1-byte opaque type"); /* must set this */
    write_dset(loc_id,2,dims2,"opaque2D",tid,buf22);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_COMPOUND
    *-------------------------------------------------------------------------
    */

    if (make_diffs)
    {
        memset(buf32,0,sizeof buf32);
    }

    tid = H5Tcreate (H5T_COMPOUND, sizeof(s_t));
    H5Tinsert(tid, "a", HOFFSET(s_t, a), H5T_NATIVE_CHAR);
    H5Tinsert(tid, "b", HOFFSET(s_t, b), H5T_NATIVE_DOUBLE);
    write_dset(loc_id,2,dims2,"compound2D",tid,buf32);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_REFERENCE (H5R_OBJECT object reference)
    *-------------------------------------------------------------------------
    */
    /* Create references to dataset */
    if (dset_name)
    {
        for (i = 0; i < 3; i++) {
            for (j = 0; j < 2; j++) {
                status=H5Rcreate(&buf42[i][j],fid,dset_name,H5R_OBJECT,(hid_t)-1);
            }
        }
        write_dset(loc_id,2,dims2,"reference2D",H5T_STD_REF_OBJ,buf42);
    }

    /*-------------------------------------------------------------------------
    * H5T_ENUM
    *-------------------------------------------------------------------------
    */

    tid = H5Tcreate(H5T_ENUM, sizeof(e_t));
    H5Tenum_insert(tid, "RED",   (val = 0, &val));
    H5Tenum_insert(tid, "GREEN", (val = 1, &val));
    write_dset(loc_id,2,dims2,"enum2D",tid,0);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_VLEN
    *-------------------------------------------------------------------------
    */

    /* Allocate and initialize VL dataset to write */
    n = 0;
    for(i = 0; i < 3; i++)
    {
        for(j = 0; j < 2; j++)
        {
            buf52[i][j].p = HDmalloc((i + 1) * sizeof(int));
            buf52[i][j].len = i + 1;
            for(l = 0; l < i + 1; l++)
            {
                if (make_diffs)
                    ((int *)buf52[i][j].p)[l] = 0;
                else
                    ((int *)buf52[i][j].p)[l] = n++;
            }
        }
    }

    sid = H5Screate_simple(2, dims2, NULL);
    tid = H5Tvlen_create(H5T_NATIVE_INT);
    did = H5Dcreate2(loc_id, "vlen2D", tid, sid, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    status = H5Dwrite(did, tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf52);
    assert(status >= 0);
    status = H5Dvlen_reclaim(tid, sid, H5P_DEFAULT, buf52);
    assert(status >= 0);
    status = H5Dclose(did);
    status = H5Tclose(tid);
    status = H5Sclose(sid);

    /*-------------------------------------------------------------------------
    * H5T_ARRAY
    *-------------------------------------------------------------------------
    */

    if (make_diffs)
    {
        memset(buf62,0,sizeof buf62);
    }


    tid = H5Tarray_create2(H5T_NATIVE_INT, 1, dimarray);
    write_dset(loc_id, 2, dims2, "array2D", tid, buf62);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_INTEGER, write a fill value
    *-------------------------------------------------------------------------
    */


    if (make_diffs)
    {
        memset(buf72, 0, sizeof buf72);
        memset(buf82, 0, sizeof buf82);
    }


    dcpl = H5Pcreate(H5P_DATASET_CREATE);
    status = H5Pset_fill_value(dcpl, H5T_NATIVE_INT, &fillvalue);
    sid = H5Screate_simple(2, dims2, NULL);
    did = H5Dcreate2(loc_id, "integer2D", H5T_NATIVE_INT, sid, H5P_DEFAULT, dcpl, H5P_DEFAULT);
    status = H5Dwrite(did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf72);
    status = H5Pclose(dcpl);
    status = H5Dclose(did);
    status = H5Sclose(sid);

    /*-------------------------------------------------------------------------
    * H5T_FLOAT
    *-------------------------------------------------------------------------
    */

    write_dset(loc_id,2,dims2,"float2D",H5T_NATIVE_FLOAT,buf82);


    /*-------------------------------------------------------------------------
    * 3D
    *-------------------------------------------------------------------------
    */

    /*-------------------------------------------------------------------------
    * H5T_STRING
    *-------------------------------------------------------------------------
    */

    if (make_diffs)
    {
        for (i=0; i<4; i++)
            for (j=0; j<3; j++)
                for (k=0; k<2; k++)
                    for (l=0; l<2; l++)
                        buf13[i][j][k][l]='z';
    }

    tid = H5Tcopy(H5T_C_S1);
    status  = H5Tset_size(tid,(size_t)STR_SIZE);
    write_dset(loc_id,3,dims3,"string3D",tid,buf13);
    status = H5Tclose(tid);

    for (i=0; i<4; i++)
    {
        for (j=0; j<3; j++)
        {
            for (k=0; k<2; k++)
            {
                buf13a[i][j][k]=buf13[i][j][k];
            }
        }
    }
    tid = H5Tcopy(H5T_C_S1);
    status  = H5Tset_size(tid, H5T_VARIABLE);
    write_dset(loc_id,3,dims3,"VLstring3D",tid,buf13a);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_BITFIELD
    *-------------------------------------------------------------------------
    */


    n=1;
    for (i = 0; i < 4; i++)
    {
        for (j = 0; j < 3; j++)
        {
            for (k = 0; k < 2; k++)
            {
                if (make_diffs)
                    buf23[i][j][k]=0;
                else buf23[i][j][k]=n++;
            }
        }
    }


    tid = H5Tcopy(H5T_STD_B8LE);
    write_dset(loc_id,3,dims3,"bitfield3D",tid,buf23);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_OPAQUE
    *-------------------------------------------------------------------------
    */
    tid = H5Tcreate(H5T_OPAQUE, (size_t)1);
    status = H5Tset_tag(tid, "1-byte opaque type"); /* must set this */
    write_dset(loc_id,3,dims3,"opaque3D",tid,buf23);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_COMPOUND
    *-------------------------------------------------------------------------
    */

    n=1;
    for (i = 0; i < 4; i++)
    {
        for (j = 0; j < 3; j++)
        {
            for (k = 0; k < 2; k++)
            {
                if (make_diffs)
                {
                    buf33[i][j][k].a=0;
                    buf33[i][j][k].b=0;
                }
                else {
                    buf33[i][j][k].a=n++;
                    buf33[i][j][k].b=n++;
                }
            }
        }
    }


    tid = H5Tcreate (H5T_COMPOUND, sizeof(s_t));
    H5Tinsert(tid, "a", HOFFSET(s_t, a), H5T_NATIVE_CHAR);
    H5Tinsert(tid, "b", HOFFSET(s_t, b), H5T_NATIVE_DOUBLE);
    write_dset(loc_id,3,dims3,"compound3D",tid,buf33);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_REFERENCE (H5R_OBJECT object reference)
    *-------------------------------------------------------------------------
    */
    /* Create references to dataset */
    if (dset_name)
    {
        for (i = 0; i < 4; i++) {
            for (j = 0; j < 3; j++) {
                for (k = 0; k < 2; k++)
                    status=H5Rcreate(&buf43[i][j][k],fid,dset_name,H5R_OBJECT,(hid_t)-1);
            }
        }
        write_dset(loc_id,3,dims3,"reference3D",H5T_STD_REF_OBJ,buf43);
    }

    /*-------------------------------------------------------------------------
    * H5T_ENUM
    *-------------------------------------------------------------------------
    */

    tid = H5Tcreate(H5T_ENUM, sizeof(e_t));
    H5Tenum_insert(tid, "RED",   (val = 0, &val));
    H5Tenum_insert(tid, "GREEN", (val = 1, &val));
    write_dset(loc_id,3,dims3,"enum3D",tid,0);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_VLEN
    *-------------------------------------------------------------------------
    */

    /* Allocate and initialize VL dataset to write */
    n=0;
    for(i = 0; i < 4; i++)
    {
        for(j = 0; j < 3; j++)
        {
            for(k = 0; k < 2; k++)
            {
                buf53[i][j][k].p = HDmalloc((i + 1) * sizeof(int));
                buf53[i][j][k].len = i + 1;
                for(l = 0; l < i + 1; l++)
                {
                    if(make_diffs)
                        ((int *)buf53[i][j][k].p)[l] = 0;
                    else
                        ((int *)buf53[i][j][k].p)[l] = n++;
                }
            }
        }
    }

    sid = H5Screate_simple(3, dims3, NULL);
    tid = H5Tvlen_create(H5T_NATIVE_INT);
    did = H5Dcreate2(loc_id, "vlen3D", tid, sid, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    status = H5Dwrite(did, tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf53);
    assert(status >= 0);
    status = H5Dvlen_reclaim(tid, sid, H5P_DEFAULT, buf53);
    assert(status >= 0);
    status = H5Dclose(did);
    status = H5Tclose(tid);
    status = H5Sclose(sid);

    /*-------------------------------------------------------------------------
    * H5T_ARRAY
    *-------------------------------------------------------------------------
    */


    n=1;
    for (i = 0; i < 24; i++) {
        for (j = 0; j < (int)dimarray[0]; j++) {
            if (make_diffs) buf63[i][j]=0;
            else buf63[i][j]=n++;
        }
    }

    tid = H5Tarray_create2(H5T_NATIVE_INT, 1, dimarray);
    write_dset(loc_id, 3, dims3, "array3D", tid, buf63);
    status = H5Tclose(tid);

    /*-------------------------------------------------------------------------
    * H5T_INTEGER and H5T_FLOAT
    *-------------------------------------------------------------------------
    */
    n=1; f=1;
    for (i = 0; i < 4; i++) {
        for (j = 0; j < 3; j++) {
            for (k = 0; k < 2; k++) {
                if (make_diffs) {
                    buf73[i][j][k]=0;
                    buf83[i][j][k]=0;
                }
                else {
                    buf73[i][j][k]=n++;
                    buf83[i][j][k]=f++;
                }
            }
        }
    }
    write_dset(loc_id,3,dims3,"integer3D",H5T_NATIVE_INT,buf73);
    write_dset(loc_id,3,dims3,"float3D",H5T_NATIVE_FLOAT,buf83);
}

/*-------------------------------------------------------------------------
* Function: gen_datareg
*
* Purpose: generate a dataset region and its reference
*
* Date: April 19, 2006
*
*-------------------------------------------------------------------------
*/

static
void gen_datareg(hid_t fid,
                 int make_diffs /* flag to modify data buffers */)
{
    /* data dataset */
    hid_t           did1;              /* dataset ID   */
    hid_t           sid1;              /* dataspace ID  */
    hsize_t         dims1[2] = {10,10};/* dimensions */
    int             *buf;              /* dataset buffer */
    /* reference dataset */
    hid_t           did2;              /* dataset ID   */
    hid_t           sid2;              /* dataspace ID  */
    hsize_t         dims2[] = {2};     /* 2 references */
    hdset_reg_ref_t *rbuf;             /* buffer for write the references  */
    hsize_t         start[10];         /* starting location of hyperslab */
    hsize_t         count[10];         /* element count of hyperslab */
    hsize_t         coord[5][2];       /* coordinates for point selection */
    herr_t          status;
    int             i;

    /* allocate the buffer for write the references */
    rbuf = HDcalloc((size_t)2, sizeof(hdset_reg_ref_t));

    /* allocate the buffer for write the data dataset */
    buf = HDmalloc(10 * 10 * sizeof(int));

    for(i = 0; i < 10 * 10; i++)
        buf[i] = i;

    /* create the data dataset */
    sid1   = H5Screate_simple(2, dims1, NULL);
    did1   = H5Dcreate2(fid, "dsetref", H5T_NATIVE_INT, sid1, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    status = H5Dwrite(did1, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf);
    HDassert(status >= 0);

    /* create the reference dataset */
    sid2   = H5Screate_simple(1, dims2, NULL);
    did2   = H5Dcreate2(fid, "refreg", H5T_STD_REF_DSETREG, sid2, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);

    /* create the references */
    /* select hyperslab for first reference */

    start[0] = 2; start[1] = 2;
    count[0] = 6; count[1] = 6;
    if(make_diffs) {
        start[0] = 0; start[1] = 0;
        count[0] = 3; count[1] = 3;
    }

    status = H5Sselect_hyperslab(sid1, H5S_SELECT_SET, start, NULL, count, NULL);
    HDassert(status >= 0);
    H5Sget_select_npoints(sid1);

    /* store first dataset region */
    status = H5Rcreate(&rbuf[0], fid, "dsetref", H5R_DATASET_REGION, sid1);
    HDassert(status >= 0);

    /* select sequence of five points for second reference */
    coord[0][0]=6; coord[0][1]=9;
    coord[1][0]=2; coord[1][1]=2;
    coord[2][0]=8; coord[2][1]=4;
    coord[3][0]=1; coord[3][1]=6;
    coord[4][0]=2; coord[4][1]=8;
    if (make_diffs)
    {
        coord[1][0]=3; coord[1][1]=3;
        coord[3][0]=2; coord[3][1]=5;
        coord[4][0]=1; coord[4][1]=7;
    }
    H5Sselect_elements(sid1,H5S_SELECT_SET,(size_t)5,(const hsize_t *)coord);
    H5Sget_select_npoints(sid1);

    /* store second dataset region */
    H5Rcreate(&rbuf[1],fid,"dsetref",H5R_DATASET_REGION,sid1);

    /* write */
    status = H5Dwrite(did2,H5T_STD_REF_DSETREG,H5S_ALL,H5S_ALL,H5P_DEFAULT,rbuf);
    HDassert(status >= 0);

    /* close, free memory buffers */
    status = H5Dclose(did1);
    HDassert(status >= 0);
    status = H5Sclose(sid1);
    HDassert(status >= 0);
    status = H5Dclose(did2);
    HDassert(status >= 0);
    status = H5Sclose(sid2);
    HDassert(status >= 0);

    HDfree(rbuf);
    HDfree(buf);
}


/*-------------------------------------------------------------------------
* Function: test_hyperslab
*
* Purpose: test diff by hyperslabs. create a dataset with 1GB dimensions
*  by iterating trough 1KB hyperslabs
*
*-------------------------------------------------------------------------
*/
static
int test_hyperslab(const char *fname,
                   int make_diffs /* flag to modify data buffers */)
{
    hid_t   did=-1;
    hid_t   fid=-1;
    hid_t   f_sid=-1;
    hid_t   m_sid=-1;
    hid_t   tid=-1;
    hid_t   dcpl=-1;
    hsize_t dims[1]={GBLL};                  /* dataset dimensions */
    hsize_t hs_size[1]={GBLL/(1024*1024)};   /* hyperslab dimensions */
    hsize_t chunk_dims[1]={GBLL/1024};       /* chunk dimensions */
    hsize_t hs_start[1];
    size_t  size;
    size_t  nelmts=(size_t)GBLL/(1024*1024); /* elements in each hyperslab */
    char    fillvalue=-1;
    char    *buf=NULL;
    int     i, j, s;
    char    c;

    /* create */
    fid = H5Fcreate(fname, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    if((dcpl = H5Pcreate(H5P_DATASET_CREATE)) < 0)
        goto out;
    if(H5Pset_fill_value(dcpl, H5T_NATIVE_CHAR, &fillvalue) < 0)
        goto out;
    if(H5Pset_chunk(dcpl, 1, chunk_dims) < 0)
        goto out;
    if((f_sid = H5Screate_simple(1, dims, NULL)) < 0)
        goto out;
    if((did = H5Dcreate2(fid, "big", H5T_NATIVE_CHAR, f_sid, H5P_DEFAULT, dcpl, H5P_DEFAULT)) < 0)
        goto out;
    if((m_sid = H5Screate_simple(1, hs_size, hs_size)) < 0)
        goto out;
    if((tid = H5Dget_type(did)) < 0)
        goto out;
    if((size = H5Tget_size(tid)) <= 0)
        goto out;

    /* create a evenly divided buffer from 0 to 127  */
    buf = (char *)HDmalloc((size_t)(nelmts * size));
    s = 1024 * 1024 / 127;
    for(i = 0, j = 0, c = 0; i < 1024 * 1024; j++, i++) {
        if(j == s) {
            c++;
            j = 0;
        }

        /* set the hyperslab values */
        HDmemset(buf, c, nelmts);

        /* make a different hyperslab at this position */
        if(make_diffs && i == 512 * 512)
            HDmemset(buf, 0, nelmts);

        hs_start[0] = i * GBLL/(1024*1024);
        if (H5Sselect_hyperslab (f_sid,H5S_SELECT_SET,hs_start,NULL,hs_size, NULL) < 0)
            goto out;

        /* write only one hyperslab */
        if ( i==512*512)
        {
            if (H5Dwrite (did,H5T_NATIVE_CHAR,m_sid,f_sid,H5P_DEFAULT,buf) < 0)
                goto out;
        }

    }
    HDfree(buf);
    buf=NULL;

    /* close */
    if(H5Sclose(f_sid) < 0)
        goto out;
    if(H5Sclose(m_sid) < 0)
        goto out;
    if(H5Pclose(dcpl) < 0)
        goto out;
    if(H5Dclose(did) < 0)
        goto out;
    H5Fclose(fid);

    return 0;

out:
    H5E_BEGIN_TRY {
        H5Pclose(dcpl);
        H5Sclose(f_sid);
        H5Sclose(m_sid);
        H5Dclose(did);
        H5Fclose(fid);
    } H5E_END_TRY;
    return -1;

}


/*-------------------------------------------------------------------------
* Function: write_attr
*
* Purpose: utility function to write an attribute in LOC_ID
*
*-------------------------------------------------------------------------
*/
static
int write_attr(hid_t loc_id,
               int rank,
               hsize_t *dims,
               const char *name,
               hid_t tid,
               void *buf)
{
    hid_t   aid=-1;
    hid_t   sid=-1;

    /* create a space  */
    if((sid = H5Screate_simple(rank, dims, NULL)) < 0)
        goto out;

    /* create the attribute */
    if((aid = H5Acreate2(loc_id, name, tid, sid, H5P_DEFAULT, H5P_DEFAULT)) < 0)
        goto out;

    /* write */
    if(buf)
    {
        if(H5Awrite(aid, tid, buf) < 0)
            goto out;
    }

    /* close */
    H5Aclose(aid);
    H5Sclose(sid);

    return SUCCEED;

out:

    H5Aclose(aid);
    H5Sclose(sid);
    return FAIL;
}

/*-------------------------------------------------------------------------
* Function: write_dset
*
* Purpose: utility function to create and write a dataset in LOC_ID
*
*-------------------------------------------------------------------------
*/
static
int write_dset( hid_t loc_id,
               int rank,
               hsize_t *dims,
               const char *name,
               hid_t tid,
               void *buf )
{
    hid_t   did=-1;
    hid_t   sid=-1;

    /* create a space  */
    if((sid = H5Screate_simple(rank, dims, NULL)) < 0)
        goto out;

    /* create the dataset */
    if((did = H5Dcreate2(loc_id, name, tid, sid, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0)
        goto out;

    /* write */
    if(buf)
    {
        if(H5Dwrite(did, tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf) < 0)
            goto out;
    }

    /* close */
    H5Dclose(did);
    H5Sclose(sid);

    return SUCCEED;

out:

    H5Dclose(did);
    H5Sclose(sid);
    return FAIL;
}

