/*
 * 
 * (c) Copyright, 1986-1995
 * Biomedical Imaging Resource
 * Mayo Foundation
 *
 * dbh.h
 *
 *
 * database sub-definitions
 */

struct header_key                       /*      header_key       */
    {                                           /* off + size*/
        int sizeof_hdr;                         /* 0 + 4     */
        char data_type[10];                     /* 4 + 10    */
        char db_name[18];                       /* 14 + 18   */
        int extents;                            /* 32 + 4    */

        short session_error;                    /* 36 + 2    */
        char regular;                           /* 38 + 1    */
        char hkey_un0;                          /* 39 + 1    */
    };                                          /* total=40  */

struct image_dimension                  /*      image_dimension  */
    {                                           /* off + size*/
        short dim[8];                           /* 0 + 16    */
        char vox_units[4];                      /* 16 + 4    */
        char cal_units[8];                      /* 20 + 4    */
        short unused1;                  /* 24 + 2    */
        short datatype;                 /* 30 + 2    */
        short bitpix;                           /* 32 + 2    */
        short dim_un0;                      /* 34 + 2    */
        float pixdim[8];                        /* 36 + 32   */
                        /* 
                                pixdim[] specifies the voxel dimensions:
                                pixdim[1] - voxel width
                                pixdim[2] - voxel height
                                pixdim[3] - interslice distance
                                        ..etc
                        */
        float vox_offset;                       /* 68 + 4    */
        float funused1;                         /* 76 + 4    */

        float funused2;                         /* 80 + 4    */
        float funused3;                         /* 80 + 4    */
        float cal_max;                          /* 84 + 4    */
        float cal_min;                          /* 88 + 4    */
        int compressed;                         /* 92 + 4    */
        int verified;                           /* 96 + 4    */
        int glmax, glmin;                       /* 100 + 8   */
    };                                          /* total=108 */
         
struct data_history                     /*      data_history     */
    {                                           /* off + size*/
        char descrip[80];                       /* 0 + 80    */
        char aux_file[24];                      /* 80 + 24   */
        char orient;                            /* 104 + 1   */
        char originator[10];                    /* 105 + 10  */
        char generated[10];                     /* 115 + 10  */
        char scannum[10];                       /* 125 + 10  */
        char patient_id[10];                    /* 135 + 10  */
        char exp_date[10];                      /* 145 + 10  */
        char exp_time[10];                      /* 155 + 10  */
        char hist_un0[3];                       /* 165 + 3   */
        int views;                              /* 168 + 4   */
        int vols_added;                         /* 172 + 4   */
        int start_field;                        /* 176 + 4   */
        int field_skip;                         /* 180 + 4   */
        int omax,omin;                          /* 184 + 8   */
        int smax,smin;                          /* 192 + 8   */
    };                                          /* total=200 */

struct dsr                              /*      dsr              */
    {                                           /* off + size*/
        struct header_key hk;                   /* 0 + 40    */
        struct image_dimension dime;            /* 40 + 108  */
        struct data_history hist;               /* 148 + 200 */
    };                                          /* total=348 */
        
/* Acceptable values for hdr.dime.datatype */

#define DT_NONE                         0
#define DT_UNKNOWN                      0
#define DT_BINARY                       1
#define DT_UNSIGNED_CHAR                2
#define DT_SIGNED_SHORT                 4
#define DT_SIGNED_INT                   8
#define DT_FLOAT                        16
#define DT_COMPLEX                      32
#define DT_DOUBLE                       64
#define DT_RGB                          128
#define DT_ALL                          255

typedef struct 
        {
        float real;
        float imag;
        } COMPLEX;
