/* Do not edit this file. It is produced from the corresponding .m4 source */
/*
 *  Copyright 1996, University Corporation for Atmospheric Research
 *  See netcdf/COPYRIGHT file for copying and redistribution conditions.
 *  
 *  This file contains some routines derived from code
 *  which is copyrighted by Sun Microsystems, Inc.
 *  The "#ifdef vax" versions of
 *     ncx_put_float_float()
 *     ncx_get_float_float()
 *     ncx_put_double_double()
 *     ncx_get_double_double()
 *     ncx_putn_float_float()
 *     ncx_getn_float_float()
 *     ncx_putn_double_double()
 *     ncx_getn_double_double()
 *  are derived from xdr_float() and xdr_double() routines
 *  in the freely available, copyrighted Sun RPCSRC 3.9
 *  distribution, xdr_float.c.
 *  Our "value added" is that these are always memory to memory,
 *  they handle IEEE subnormals properly, and their "n" versions
 *  operate speedily on arrays.
 */
/* Id */

/*
 * An external data representation interface.
 */

#include "ncx.h"
#include <string.h>
#include <limits.h>
/* alias poorly named limits.h macros */
#define  SHORT_MAX  SHRT_MAX
#define  SHORT_MIN  SHRT_MIN
#define USHORT_MAX USHRT_MAX
#include <float.h>
#ifndef FLT_MAX /* This POSIX macro missing on some systems */
# ifndef NO_IEEE_FLOAT
# define FLT_MAX 3.40282347e+38f
# else
# error "You will need to define FLT_MAX"
# endif
#endif
#include <assert.h>

/*
 * If the machine's float domain is "smaller" than the external one
 * use the machine domain
 */
#if defined(FLT_MAX_EXP) && FLT_MAX_EXP < 128 /* 128 is X_FLT_MAX_EXP */
#undef X_FLOAT_MAX
# define X_FLOAT_MAX FLT_MAX
#undef X_FLOAT_MIN
# define X_FLOAT_MIN (-X_FLOAT_MAX)
#endif

#if _SX /* NEC SUPER UX */
#if _INT64
#undef  INT_MAX /* workaround cpp bug */
#define INT_MAX  X_INT_MAX
#undef  INT_MIN /* workaround cpp bug */
#define INT_MIN  X_INT_MIN
#undef  LONG_MAX /* workaround cpp bug */
#define LONG_MAX  X_INT_MAX
#undef  LONG_MIN /* workaround cpp bug */
#define LONG_MIN  X_INT_MIN
#elif _LONG64
#undef  LONG_MAX /* workaround cpp bug */
#define LONG_MAX  4294967295L
#undef  LONG_MIN /* workaround cpp bug */
#define LONG_MIN -4294967295L
#endif
#endif /* _SX */

static const char nada[X_ALIGN] = {0, 0, 0, 0};

#ifndef WORDS_BIGENDIAN
/* LITTLE_ENDIAN: DEC and intel */
/*
 * Routines to convert to BIGENDIAN.
 * Optimize the swapn?b() and swap?b() routines aggressivly.
 */

#define SWAP2(a) ( (((a) & 0xff) << 8) | \
    (((a) >> 8) & 0xff) )

#define SWAP4(a) ( ((a) << 24) | \
    (((a) <<  8) & 0x00ff0000) | \
    (((a) >>  8) & 0x0000ff00) | \
    (((a) >> 24) & 0x000000ff) )


static void
swapn2b(void *dst, const void *src, size_t nn)
{
  char *op = dst;
  const char *ip = src;

/* unroll the following to reduce loop overhead
 *
 *  while(nn-- != 0)
 *  {
 *    *op++ = *(++ip);
 *    *op++ = *(ip++ -1);
 *  }                                       
 */
  while(nn > 3)
  {
    *op++ = *(++ip);
    *op++ = *(ip++ -1);
    *op++ = *(++ip);
    *op++ = *(ip++ -1);
    *op++ = *(++ip);
    *op++ = *(ip++ -1);
    *op++ = *(++ip);
    *op++ = *(ip++ -1);
    nn -= 4;
  }
  while(nn-- != 0)
  {
    *op++ = *(++ip);
    *op++ = *(ip++ -1);
  }
}

# ifndef vax
static void
swap4b(void *dst, const void *src)
{
  char *op = dst;
  const char *ip = src;
  op[0] = ip[3];
  op[1] = ip[2];
  op[2] = ip[1];
  op[3] = ip[0];
}
# endif /* !vax */

static void
swapn4b(void *dst, const void *src, size_t nn)
{
  char *op = dst;
  const char *ip = src;

/* unroll the following to reduce loop overhead
 *  while(nn-- != 0)
 *  {
 *    op[0] = ip[3];
 *    op[1] = ip[2];
 *    op[2] = ip[1];
 *    op[3] = ip[0];
 *    op += 4;
 *    ip += 4;
 *  }
 */
  while(nn > 3)
  {
    op[0] = ip[3];
    op[1] = ip[2];
    op[2] = ip[1];
    op[3] = ip[0];
    op[4] = ip[7];
    op[5] = ip[6];
    op[6] = ip[5];
    op[7] = ip[4];
    op[8] = ip[11];
    op[9] = ip[10];
    op[10] = ip[9];
    op[11] = ip[8];
    op[12] = ip[15];
    op[13] = ip[14];
    op[14] = ip[13];
    op[15] = ip[12];
    op += 16;
    ip += 16;
    nn -= 4;
  }
  while(nn-- != 0)
  {
    op[0] = ip[3];
    op[1] = ip[2];
    op[2] = ip[1];
    op[3] = ip[0];
    op += 4;
    ip += 4;
  }
}

# ifndef vax
static void
swap8b(void *dst, const void *src)
{
  char *op = dst;
  const char *ip = src;
  op[0] = ip[7];
  op[1] = ip[6];
  op[2] = ip[5];
  op[3] = ip[4];
  op[4] = ip[3];
  op[5] = ip[2];
  op[6] = ip[1];
  op[7] = ip[0];
}
# endif /* !vax */

# ifndef vax
static void
swapn8b(void *dst, const void *src, size_t nn)
{
  char *op = dst;
  const char *ip = src;

/* unroll the following to reduce loop overhead
 *  while(nn-- != 0)
 *  {
 *    op[0] = ip[7];
 *    op[1] = ip[6];
 *    op[2] = ip[5];
 *    op[3] = ip[4];
 *    op[4] = ip[3];
 *    op[5] = ip[2];
 *    op[6] = ip[1];
 *    op[7] = ip[0];
 *    op += 8;
 *    ip += 8;
 *  }
 */
  while(nn > 1)
  {
    op[0] = ip[7];
    op[1] = ip[6];
    op[2] = ip[5];
    op[3] = ip[4];
    op[4] = ip[3];
    op[5] = ip[2];
    op[6] = ip[1];
    op[7] = ip[0];
    op[8] = ip[15];
    op[9] = ip[14];
    op[10] = ip[13];
    op[11] = ip[12];
    op[12] = ip[11];
    op[13] = ip[10];
    op[14] = ip[9];
    op[15] = ip[8];
    op += 16;
    ip += 16;
    nn -= 2;
  }
  while(nn-- != 0)
  {
    op[0] = ip[7];
    op[1] = ip[6];
    op[2] = ip[5];
    op[3] = ip[4];
    op[4] = ip[3];
    op[5] = ip[2];
    op[6] = ip[1];
    op[7] = ip[0];
    op += 8;
    ip += 8;
  }
}
# endif /* !vax */

#endif /* LITTLE_ENDIAN */


/*
 * Primitive numeric conversion functions.
 */

/* x_schar */

 /* We don't implement and x_schar primitives. */


/* x_short */

#if SHORT_MAX == X_SHORT_MAX
typedef short ix_short;
#define SIZEOF_IX_SHORT SIZEOF_SHORT
#define IX_SHORT_MAX SHORT_MAX
#elif INT_MAX >= X_SHORT_MAX
typedef int ix_short;
#define SIZEOF_IX_SHORT SIZEOF_INT
#define IX_SHORT_MAX INT_MAX
#elif LONG_MAX >= X_SHORT_MAX
typedef long ix_short;
#define SIZEOF_IX_SHORT SIZEOF_LONG
#define IX_SHORT_MAX LONG_MAX
#else
#error "ix_short implementation"
#endif

static void
get_ix_short(const void *xp, ix_short *ip)
{
  const uchar *cp = (const uchar *) xp;
  *ip = *cp++ << 8;
#if SIZEOF_IX_SHORT > X_SIZEOF_SHORT
  if(*ip & 0x8000)
  {
    /* extern is negative */
    *ip |= (~(0xffff)); /* N.B. Assumes "twos complement" */
  }
#endif
  *ip |= *cp; 
}

static void
put_ix_short(void *xp, const ix_short *ip)
{
  uchar *cp = (uchar *) xp;
  *cp++ = (uchar)( (*ip) >> 8 );
  *cp = (uchar)(*ip) & 0xff;
}


int
ncx_get_short_schar(const void *xp, schar *ip)
{
  ix_short xx;
  get_ix_short(xp, &xx);
  *ip = (schar)xx;
  if(xx > SCHAR_MAX || xx < SCHAR_MIN)
    return NC_ERANGE;
  return ENOERR;
}

int
ncx_get_short_uchar(const void *xp, uchar *ip)
{
  ix_short xx;
  get_ix_short(xp, &xx);
  *ip = (uchar)xx;
  if(xx > UCHAR_MAX || xx < 0)
    return NC_ERANGE;
  return ENOERR;
}

int
ncx_get_short_short(const void *xp, short *ip)
{
#if SIZEOF_IX_SHORT == SIZEOF_SHORT && IX_SHORT_MAX == SHORT_MAX
  get_ix_short(xp, (ix_short *)ip);
  return ENOERR;
#else
  ix_short xx;
  get_ix_short(xp, &xx);
  *ip = xx;
#   if IX_SHORT_MAX > SHORT_MAX
  if(xx > SHORT_MAX || xx < SHORT_MIN)
    return NC_ERANGE;
#   endif
  return ENOERR;
#endif
}

int
ncx_get_short_int(const void *xp, int *ip)
{
#if SIZEOF_IX_SHORT == SIZEOF_INT && IX_SHORT_MAX == INT_MAX
  get_ix_short(xp, (ix_short *)ip);
  return ENOERR;
#else
  ix_short xx;
  get_ix_short(xp, &xx);
  *ip = xx;
#   if IX_SHORT_MAX > INT_MAX
  if(xx > INT_MAX || xx < INT_MIN)
    return NC_ERANGE;
#   endif
  return ENOERR;
#endif
}

int
ncx_get_short_long(const void *xp, long *ip)
{
#if SIZEOF_IX_SHORT == SIZEOF_LONG && IX_SHORT_MAX == LONG_MAX
  get_ix_short(xp, (ix_short *)ip);
  return ENOERR;
#else
  /* assert(LONG_MAX >= X_SHORT_MAX); */
  ix_short xx;
  get_ix_short(xp, &xx);
  *ip = xx;
  return ENOERR;
#endif
}

int
ncx_get_short_float(const void *xp, float *ip)
{
  ix_short xx;
  get_ix_short(xp, &xx);
  *ip = xx;
#if 0 /* TODO: determine when necessary */
  if(xx > FLT_MAX || xx < (-FLT_MAX))
    return NC_ERANGE;
#endif
  return ENOERR;
}

int
ncx_get_short_double(const void *xp, double *ip)
{
  /* assert(DBL_MAX >= X_SHORT_MAX); */
  ix_short xx;
  get_ix_short(xp, &xx);
  *ip = xx;
  return ENOERR;
}

int
ncx_put_short_schar(void *xp, const schar *ip)
{
  uchar *cp = (uchar *) xp;
  if(*ip & 0x80)
    *cp++ = 0xff;
  else
    *cp++ = 0;
  *cp = (uchar)*ip;
  return ENOERR;
}

int
ncx_put_short_uchar(void *xp, const uchar *ip)
{
  uchar *cp = (uchar *) xp;
  *cp++ = 0;
  *cp = *ip;
  return ENOERR;
}

int
ncx_put_short_short(void *xp, const short *ip)
{
#if SIZEOF_IX_SHORT == SIZEOF_SHORT && X_SHORT_MAX == SHORT_MAX
  put_ix_short(xp, (const ix_short *)ip);
  return ENOERR;
#else
  ix_short xx = (ix_short)*ip;
  put_ix_short(xp, &xx);
# if X_SHORT_MAX < SHORT_MAX
  if(*ip > X_SHORT_MAX || *ip < X_SHORT_MIN)
    return NC_ERANGE;
# endif
  return ENOERR;
#endif
}

int
ncx_put_short_int(void *xp, const int *ip)
{
#if SIZEOF_IX_SHORT == SIZEOF_INT && X_SHORT_MAX == INT_MAX
  put_ix_short(xp, (const ix_short *)ip);
  return ENOERR;
#else
  ix_short xx = (ix_short)*ip;
  put_ix_short(xp, &xx);
# if X_SHORT_MAX < INT_MAX
  if(*ip > X_SHORT_MAX || *ip < X_SHORT_MIN)
    return NC_ERANGE;
# endif
  return ENOERR;
#endif
}

int
ncx_put_short_long(void *xp, const long *ip)
{
#if SIZEOF_IX_SHORT == SIZEOF_LONG && X_SHORT_MAX == LONG_MAX
  put_ix_short(xp, (const ix_short *)ip);
  return ENOERR;
#else
  ix_short xx = (ix_short)*ip;
  put_ix_short(xp, &xx);
# if X_SHORT_MAX < LONG_MAX
  if(*ip > X_SHORT_MAX || *ip < X_SHORT_MIN)
    return NC_ERANGE;
# endif
  return ENOERR;
#endif
}

int
ncx_put_short_float(void *xp, const float *ip)
{
  ix_short xx = (ix_short) *ip;
  put_ix_short(xp, &xx);
  if(*ip > X_SHORT_MAX || *ip < X_SHORT_MIN)
    return NC_ERANGE;
  return ENOERR;
}

int
ncx_put_short_double(void *xp, const double *ip)
{
  ix_short xx = (ix_short) *ip;
  put_ix_short(xp, &xx);
  if(*ip > X_SHORT_MAX || *ip < X_SHORT_MIN)
    return NC_ERANGE;
  return ENOERR;
}

/* x_int */

#if SHORT_MAX == X_INT_MAX
typedef short ix_int;
#define SIZEOF_IX_INT SIZEOF_SHORT
#define IX_INT_MAX SHORT_MAX
#elif INT_MAX  >= X_INT_MAX
typedef int ix_int;
#define SIZEOF_IX_INT SIZEOF_INT
#define IX_INT_MAX INT_MAX
#elif LONG_MAX  >= X_INT_MAX
typedef long ix_int;
#define SIZEOF_IX_INT SIZEOF_LONG
#define IX_INT_MAX LONG_MAX
#else
#error "ix_int implementation"
#endif


static void
get_ix_int(const void *xp, ix_int *ip)
{
  const uchar *cp = (const uchar *) xp;

  *ip = *cp++ << 24;
#if SIZEOF_IX_INT > X_SIZEOF_INT
  if(*ip & 0x80000000)
  {
    /* extern is negative */
    *ip |= (~(0xffffffff)); /* N.B. Assumes "twos complement" */
  }
#endif
  *ip |= (*cp++ << 16);
  *ip |= (*cp++ << 8);
  *ip |= *cp; 
}

static void
put_ix_int(void *xp, const ix_int *ip)
{
  uchar *cp = (uchar *) xp;

  *cp++ = (uchar)( (*ip) >> 24 );
  *cp++ = (uchar)( ((*ip) & 0x00ff0000) >> 16 );
  *cp++ = (uchar)( ((*ip) & 0x0000ff00) >>  8 );
  *cp   = (uchar) ((*ip) & 0x000000ff);
}


int
ncx_get_int_schar(const void *xp, schar *ip)
{
  ix_int xx;
  get_ix_int(xp, &xx);
  *ip = (schar)xx;
  if(xx > SCHAR_MAX || xx < SCHAR_MIN)
    return NC_ERANGE;
  return ENOERR;
}

int
ncx_get_int_uchar(const void *xp, uchar *ip)
{
  ix_int xx;
  get_ix_int(xp, &xx);
  *ip = (uchar)xx;
  if(xx > UCHAR_MAX || xx < 0)
    return NC_ERANGE;
  return ENOERR;
}

int
ncx_get_int_short(const void *xp, short *ip)
{
#if SIZEOF_IX_INT == SIZEOF_SHORT && IX_INT_MAX == SHORT_MAX
  get_ix_int(xp, (ix_int *)ip);
  return ENOERR;
#else
  ix_int xx;
  get_ix_int(xp, &xx);
  *ip = (short)xx;
#  if IX_INT_MAX > SHORT_MAX
  if(xx > SHORT_MAX || xx < SHORT_MIN)
    return NC_ERANGE;
#  endif
  return ENOERR;
#endif
}

int
ncx_get_int_int(const void *xp, int *ip)
{
#if SIZEOF_IX_INT == SIZEOF_INT && IX_INT_MAX == INT_MAX
  get_ix_int(xp, (ix_int *)ip);
  return ENOERR;
#else
  ix_int xx;
  get_ix_int(xp, &xx);
  *ip = xx;
#  if IX_INT_MAX > INT_MAX
  if(xx > INT_MAX || xx < INT_MIN)
    return NC_ERANGE;
#  endif
  return ENOERR;
#endif
}

int
ncx_get_int_long(const void *xp, long *ip)
{
#if SIZEOF_IX_INT == SIZEOF_LONG && IX_INT_MAX == LONG_MAX
  get_ix_int(xp, (ix_int *)ip);
  return ENOERR;
#else
  ix_int xx;
  get_ix_int(xp, &xx);
  *ip = xx;
#  if IX_INT_MAX > LONG_MAX /* unlikely */
  if(xx > LONG_MAX || xx < LONG_MIN)
    return NC_ERANGE;
#  endif
  return ENOERR;
#endif
}

int
ncx_get_int_float(const void *xp, float *ip)
{
  ix_int xx;
  get_ix_int(xp, &xx);
  *ip = (float)xx;
#if 0 /* TODO: determine when necessary */
  if(xx > FLT_MAX || xx < (-FLT_MAX))
    return NC_ERANGE;
#endif
  return ENOERR;
}

int
ncx_get_int_double(const void *xp, double *ip)
{
  /* assert((DBL_MAX >= X_INT_MAX); */
  ix_int xx;
  get_ix_int(xp, &xx);
  *ip = xx;
  return ENOERR;
}

int
ncx_put_int_schar(void *xp, const schar *ip)
{
  uchar *cp = (uchar *) xp;
  if(*ip & 0x80)
  {
    *cp++ = 0xff;
    *cp++ = 0xff;
    *cp++ = 0xff;
  }
  else
  {
    *cp++ = 0x00;
    *cp++ = 0x00;
    *cp++ = 0x00;
  }
  *cp = (uchar)*ip;
  return ENOERR;
}

int
ncx_put_int_uchar(void *xp, const uchar *ip)
{
  uchar *cp = (uchar *) xp;
  *cp++ = 0x00;
  *cp++ = 0x00;
  *cp++ = 0x00;
  *cp   = *ip;
  return ENOERR;
}

int
ncx_put_int_short(void *xp, const short *ip)
{
#if SIZEOF_IX_INT == SIZEOF_SHORT && IX_INT_MAX == SHORT_MAX
  put_ix_int(xp, (ix_int *)ip);
  return ENOERR;
#else
  ix_int xx = (ix_int)(*ip);
  put_ix_int(xp, &xx);
#   if IX_INT_MAX < SHORT_MAX
  if(*ip > X_INT_MAX || *ip < X_INT_MIN)
    return NC_ERANGE;
#   endif
  return ENOERR;
#endif
}

int
ncx_put_int_int(void *xp, const int *ip)
{
#if SIZEOF_IX_INT == SIZEOF_INT && IX_INT_MAX == INT_MAX
  put_ix_int(xp, (ix_int *)ip);
  return ENOERR;
#else
  ix_int xx = (ix_int)(*ip);
  put_ix_int(xp, &xx);
#   if IX_INT_MAX < INT_MAX
  if(*ip > X_INT_MAX || *ip < X_INT_MIN)
    return NC_ERANGE;
#   endif
  return ENOERR;
#endif
}

int
ncx_put_int_long(void *xp, const long *ip)
{
#if SIZEOF_IX_INT == SIZEOF_LONG && IX_INT_MAX == LONG_MAX
  put_ix_int(xp, (ix_int *)ip);
  return ENOERR;
#else
  ix_int xx = (ix_int)(*ip);
  put_ix_int(xp, &xx);
#   if IX_INT_MAX < LONG_MAX
  if(*ip > X_INT_MAX || *ip < X_INT_MIN)
    return NC_ERANGE;
#   endif
  return ENOERR;
#endif
}

int
ncx_put_int_float(void *xp, const float *ip)
{
  ix_int xx = (ix_int)(*ip);
  put_ix_int(xp, &xx);
  if(*ip > (double)X_INT_MAX || *ip < (double)X_INT_MIN)
    return NC_ERANGE;
  return ENOERR;
}

int
ncx_put_int_double(void *xp, const double *ip)
{
  ix_int xx = (ix_int)(*ip);
  put_ix_int(xp, &xx);
  if(*ip > X_INT_MAX || *ip < X_INT_MIN)
    return NC_ERANGE;
  return ENOERR;
}
 

/* x_float */

#if X_SIZEOF_FLOAT == SIZEOF_FLOAT && !defined(NO_IEEE_FLOAT)

static void
get_ix_float(const void *xp, float *ip)
{
#ifdef WORDS_BIGENDIAN
  (void) memcpy(ip, xp, sizeof(float));
#else
  swap4b(ip, xp);
#endif
}

static void
put_ix_float(void *xp, const float *ip)
{
#ifdef WORDS_BIGENDIAN
  (void) memcpy(xp, ip, X_SIZEOF_FLOAT);
#else
  swap4b(xp, ip);
#endif
}

#elif vax

/* What IEEE single precision floating point looks like on a Vax */
struct  ieee_single {
  unsigned int  exp_hi       : 7;
  unsigned int  sign         : 1;
  unsigned int  mant_hi      : 7;
  unsigned int  exp_lo       : 1;
  unsigned int  mant_lo_hi   : 8;
  unsigned int  mant_lo_lo   : 8;
};

/* Vax single precision floating point */
struct  vax_single {
  unsigned int  mantissa1 : 7;
  unsigned int  exp       : 8;
  unsigned int  sign      : 1;
  unsigned int  mantissa2 : 16;
};

#define VAX_SNG_BIAS  0x81
#define IEEE_SNG_BIAS 0x7f

static struct sgl_limits {
  struct vax_single s;
  struct ieee_single ieee;
} max = {
  { 0x7f, 0xff, 0x0, 0xffff },  /* Max Vax */
  { 0x7f, 0x0, 0x0, 0x1, 0x0, 0x0 }   /* Max IEEE */
};
static struct sgl_limits min = {
  { 0x0, 0x0, 0x0, 0x0 }, /* Min Vax */
  { 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 }    /* Min IEEE */
};

static void
get_ix_float(const void *xp, float *ip)
{
    struct vax_single *const vsp = (struct vax_single *) ip;
    const struct ieee_single *const isp =
       (const struct ieee_single *) xp;
    unsigned exp = isp->exp_hi << 1 | isp->exp_lo;

    switch(exp) {
    case 0 :
      /* ieee subnormal */
      if(isp->mant_hi == min.ieee.mant_hi
        && isp->mant_lo_hi == min.ieee.mant_lo_hi
        && isp->mant_lo_lo == min.ieee.mant_lo_lo)
      {
        *vsp = min.s;
      }
      else
      {
        unsigned mantissa = (isp->mant_hi << 16)
           | isp->mant_lo_hi << 8
           | isp->mant_lo_lo;
        unsigned tmp = mantissa >> 20;
        if(tmp >= 4) {
          vsp->exp = 2;
        } else if (tmp >= 2) {
          vsp->exp = 1;
        } else {
          *vsp = min.s;
          break;
        } /* else */
        tmp = mantissa - (1 << (20 + vsp->exp ));
        tmp <<= 3 - vsp->exp;
        vsp->mantissa2 = tmp;
        vsp->mantissa1 = (tmp >> 16);
      }
      break;
    case 0xfe :
    case 0xff :
      *vsp = max.s;
      break;
    default :
      vsp->exp = exp - IEEE_SNG_BIAS + VAX_SNG_BIAS;
      vsp->mantissa2 = isp->mant_lo_hi << 8 | isp->mant_lo_lo;
      vsp->mantissa1 = isp->mant_hi;
    }

    vsp->sign = isp->sign;

}


static void
put_ix_float(void *xp, const float *ip)
{
    const struct vax_single *const vsp =
       (const struct vax_single *)ip;
    struct ieee_single *const isp = (struct ieee_single *) xp;

    switch(vsp->exp){
    case 0 :
      /* all vax float with zero exponent map to zero */
      *isp = min.ieee;
      break;
    case 2 :
    case 1 :
    {
      /* These will map to subnormals */
      unsigned mantissa = (vsp->mantissa1 << 16)
           | vsp->mantissa2;
      mantissa >>= 3 - vsp->exp;
      mantissa += (1 << (20 + vsp->exp));
      isp->mant_lo_lo = mantissa;
      isp->mant_lo_hi = mantissa >> 8;
      isp->mant_hi = mantissa >> 16;
      isp->exp_lo = 0;
      isp->exp_hi = 0;
    }
      break;
    case 0xff : /* max.s.exp */
      if( vsp->mantissa2 == max.s.mantissa2
        && vsp->mantissa1 == max.s.mantissa1)
      {
        /* map largest vax float to ieee infinity */
        *isp = max.ieee;
        break;
      } /* else, fall thru */
    default :
    {
      unsigned exp = vsp->exp - VAX_SNG_BIAS + IEEE_SNG_BIAS;
      isp->exp_hi = exp >> 1;
      isp->exp_lo = exp;
      isp->mant_lo_lo = vsp->mantissa2;
      isp->mant_lo_hi = vsp->mantissa2 >> 8;
      isp->mant_hi = vsp->mantissa1;
    }
    }

    isp->sign = vsp->sign;

}

  /* vax */
#elif defined(_CRAY) && !defined(__crayx1)

/*
 * Return the number of bytes until the next "word" boundary
 * N.B. This is based on the very wierd YMP address structure,
 * which puts the address within a word in the leftmost 3 bits
 * of the address.
 */
static size_t
word_align(const void *vp)
{
  const size_t rem = ((size_t)vp >> (64 - 3)) & 0x7;
  return (rem != 0);
}

struct ieee_single_hi {
  unsigned int  sign  : 1;
  unsigned int   exp  : 8;
  unsigned int  mant  :23;
  unsigned int  pad :32;
};
typedef struct ieee_single_hi ieee_single_hi;

struct ieee_single_lo {
  unsigned int  pad :32;
  unsigned int  sign  : 1;
  unsigned int   exp  : 8;
  unsigned int  mant  :23;
};
typedef struct ieee_single_lo ieee_single_lo;

static const int ieee_single_bias = 0x7f;

struct ieee_double {
  unsigned int  sign  : 1;
  unsigned int   exp  :11;
  unsigned int  mant  :52;
};
typedef struct ieee_double ieee_double;

static const int ieee_double_bias = 0x3ff;

#if defined(NO_IEEE_FLOAT)

struct cray_single {
  unsigned int  sign  : 1;
  unsigned int   exp  :15;
  unsigned int  mant  :48;
};
typedef struct cray_single cray_single;

static const int cs_ieis_bias = 0x4000 - 0x7f;

static const int cs_id_bias = 0x4000 - 0x3ff;


static void
get_ix_float(const void *xp, float *ip)
{

  if(word_align(xp) == 0)
  {
    const ieee_single_hi *isp = (const ieee_single_hi *) xp;
    cray_single *csp = (cray_single *) ip;

    if(isp->exp == 0)
    {
      /* ieee subnormal */
      *ip = (double)isp->mant;
      if(isp->mant != 0)
      {
        csp->exp -= (ieee_single_bias + 22);
      }
    }
    else
    {
      csp->exp  = isp->exp + cs_ieis_bias + 1;
      csp->mant = isp->mant << (48 - 1 - 23);
      csp->mant |= (1 << (48 - 1));
    }
    csp->sign = isp->sign;


  }
  else
  {
    const ieee_single_lo *isp = (const ieee_single_lo *) xp;
    cray_single *csp = (cray_single *) ip;

    if(isp->exp == 0)
    {
      /* ieee subnormal */
      *ip = (double)isp->mant;
      if(isp->mant != 0)
      {
        csp->exp -= (ieee_single_bias + 22);
      }
    }
    else
    {
      csp->exp  = isp->exp + cs_ieis_bias + 1;
      csp->mant = isp->mant << (48 - 1 - 23);
      csp->mant |= (1 << (48 - 1));
    }
    csp->sign = isp->sign;


  }
}

static void
put_ix_float(void *xp, const float *ip)
{
  if(word_align(xp) == 0)
  {
    ieee_single_hi *isp = (ieee_single_hi*)xp;
  const cray_single *csp = (const cray_single *) ip;
  int ieee_exp = csp->exp - cs_ieis_bias -1;

  isp->sign = csp->sign;

  if(ieee_exp >= 0xff)
  {
    /* NC_ERANGE => ieee Inf */
    isp->exp = 0xff;
    isp->mant = 0x0;
  }
  else if(ieee_exp > 0)
  {
    /* normal ieee representation */
    isp->exp  = ieee_exp;
    /* assumes cray rep is in normal form */
    assert(csp->mant & 0x800000000000);
    isp->mant = (((csp->mant << 1) &
        0xffffffffffff) >> (48 - 23));
  }
  else if(ieee_exp > -23)
  {
    /* ieee subnormal, right shift */
    const int rshift = (48 - 23 - ieee_exp);

    isp->mant = csp->mant >> rshift;

#if 0
    if(csp->mant & (1 << (rshift -1)))
    {
      /* round up */
      isp->mant++;
    }
#endif

    isp->exp  = 0;
  }
  else
  {
    /* smaller than ieee can represent */
    isp->exp = 0;
    isp->mant = 0;
  }

  }
  else
  {
    ieee_single_lo *isp = (ieee_single_lo*)xp;
  const cray_single *csp = (const cray_single *) ip;
  int ieee_exp = csp->exp - cs_ieis_bias -1;

  isp->sign = csp->sign;

  if(ieee_exp >= 0xff)
  {
    /* NC_ERANGE => ieee Inf */
    isp->exp = 0xff;
    isp->mant = 0x0;
  }
  else if(ieee_exp > 0)
  {
    /* normal ieee representation */
    isp->exp  = ieee_exp;
    /* assumes cray rep is in normal form */
    assert(csp->mant & 0x800000000000);
    isp->mant = (((csp->mant << 1) &
        0xffffffffffff) >> (48 - 23));
  }
  else if(ieee_exp > -23)
  {
    /* ieee subnormal, right shift */
    const int rshift = (48 - 23 - ieee_exp);

    isp->mant = csp->mant >> rshift;

#if 0
    if(csp->mant & (1 << (rshift -1)))
    {
      /* round up */
      isp->mant++;
    }
#endif

    isp->exp  = 0;
  }
  else
  {
    /* smaller than ieee can represent */
    isp->exp = 0;
    isp->mant = 0;
  }

  }
}

#else
  /* IEEE Cray with only doubles */
static void
get_ix_float(const void *xp, float *ip)
{

  ieee_double *idp = (ieee_double *) ip;

  if(word_align(xp) == 0)
  {
    const ieee_single_hi *isp = (const ieee_single_hi *) xp;
    if(isp->exp == 0 && isp->mant == 0)
    {
      idp->exp = 0;
      idp->mant = 0;
    }
    else
    {
      idp->exp = isp->exp + (ieee_double_bias - ieee_single_bias);
      idp->mant = isp->mant << (52 - 23);
    }
    idp->sign = isp->sign;
  }
  else
  {
    const ieee_single_lo *isp = (const ieee_single_lo *) xp;
    if(isp->exp == 0 && isp->mant == 0)
    {
      idp->exp = 0;
      idp->mant = 0;
    }
    else
    {
      idp->exp = isp->exp + (ieee_double_bias - ieee_single_bias);
      idp->mant = isp->mant << (52 - 23);
    }
    idp->sign = isp->sign;
  }
}

static void
put_ix_float(void *xp, const float *ip)
{
  const ieee_double *idp = (const ieee_double *) ip;
  if(word_align(xp) == 0)
  {
    ieee_single_hi *isp = (ieee_single_hi*)xp;
    if(idp->exp > (ieee_double_bias - ieee_single_bias))
      isp->exp = idp->exp - (ieee_double_bias - ieee_single_bias);
    else
      isp->exp = 0;
    isp->mant = idp->mant >> (52 - 23);
    isp->sign = idp->sign;
  }
  else
  {
    ieee_single_lo *isp = (ieee_single_lo*)xp;
    if(idp->exp > (ieee_double_bias - ieee_single_bias))
      isp->exp = idp->exp - (ieee_double_bias - ieee_single_bias);
    else
      isp->exp = 0;
    isp->mant = idp->mant >> (52 - 23);
    isp->sign = idp->sign;
  }
}
#endif

#elif _SX && _FLOAT2
static void
get_ix_float(const void *xp, float *ip)
{
  const int ncnv = ie3_fl2(xp, ip, 4, 8, 1);
}

static void
put_ix_float(void *xp, const float *ip)
{
  const int ncnv = fl2_ie3(ip, xp, 8, 4, 1);
}
#else
#error "ix_float implementation"
#endif


int
ncx_get_float_schar(const void *xp, schar *ip)
{
  float xx;
  get_ix_float(xp, &xx);
  *ip = (schar) xx;
  if(xx > SCHAR_MAX || xx < SCHAR_MIN)
    return NC_ERANGE;
  return ENOERR;
}

int
ncx_get_float_uchar(const void *xp, uchar *ip)
{
  float xx;
  get_ix_float(xp, &xx);
  *ip = (uchar) xx;
  if(xx > UCHAR_MAX || xx < 0)
    return NC_ERANGE;
  return ENOERR;
}

int
ncx_get_float_short(const void *xp, short *ip)
{
  float xx;
  get_ix_float(xp, &xx);
  *ip = (short) xx;
  if(xx > SHORT_MAX || xx < SHORT_MIN)
    return NC_ERANGE;
  return ENOERR;
}

int
ncx_get_float_int(const void *xp, int *ip)
{
  float xx;
  get_ix_float(xp, &xx);
  *ip = (int) xx;
  if(xx > (double)INT_MAX || xx < (double)INT_MIN)
    return NC_ERANGE;
  return ENOERR;
}

int
ncx_get_float_long(const void *xp, long *ip)
{
  float xx;
  get_ix_float(xp, &xx);
  *ip = (long) xx;
  if(xx > LONG_MAX || xx < LONG_MIN)
    return NC_ERANGE;
  return ENOERR;
}

int
ncx_get_float_float(const void *xp, float *ip)
{
  /* TODO */
  get_ix_float(xp, ip);
  return ENOERR;
}

int
ncx_get_float_double(const void *xp, double *ip)
{
  /* TODO */
  float xx;
  get_ix_float(xp, &xx);
  *ip = xx;
  return ENOERR;
}


int
ncx_put_float_schar(void *xp, const schar *ip)
{
  float xx = (float) *ip;
  put_ix_float(xp, &xx);
  return ENOERR;
}

int
ncx_put_float_uchar(void *xp, const uchar *ip)
{
  float xx = (float) *ip;
  put_ix_float(xp, &xx);
  return ENOERR;
}

int
ncx_put_float_short(void *xp, const short *ip)
{
  float xx = (float) *ip;
  put_ix_float(xp, &xx);
#if 0 /* TODO: figure this out */
  if((float)(*ip) > X_FLOAT_MAX || (float)(*ip) < X_FLOAT_MIN)
    return NC_ERANGE;
#endif
  return ENOERR;
}

int
ncx_put_float_int(void *xp, const int *ip)
{
  float xx = (float) *ip;
  put_ix_float(xp, &xx);
#if 1 /* TODO: figure this out */
  if((float)(*ip) > X_FLOAT_MAX || (float)(*ip) < X_FLOAT_MIN)
    return NC_ERANGE;
#endif
  return ENOERR;
}

int
ncx_put_float_long(void *xp, const long *ip)
{
  float xx = (float) *ip;
  put_ix_float(xp, &xx);
#if 1 /* TODO: figure this out */
  if((float)(*ip) > X_FLOAT_MAX || (float)(*ip) < X_FLOAT_MIN)
    return NC_ERANGE;
#endif
  return ENOERR;
}

int
ncx_put_float_float(void *xp, const float *ip)
{
  put_ix_float(xp, ip);
#ifdef NO_IEEE_FLOAT
  if(*ip > X_FLOAT_MAX || *ip < X_FLOAT_MIN)
    return NC_ERANGE;
#endif
  return ENOERR;
}

int
ncx_put_float_double(void *xp, const double *ip)
{
  float xx = (float) *ip;
  put_ix_float(xp, &xx);
  if(*ip > X_FLOAT_MAX || *ip < X_FLOAT_MIN)
    return NC_ERANGE;
  return ENOERR;
}

/* x_double */

#if X_SIZEOF_DOUBLE == SIZEOF_DOUBLE  && !defined(NO_IEEE_FLOAT)

static void
get_ix_double(const void *xp, double *ip)
{
#ifdef WORDS_BIGENDIAN
  (void) memcpy(ip, xp, sizeof(double));
#else
  swap8b(ip, xp);
#endif
}

static void
put_ix_double(void *xp, const double *ip)
{
#ifdef WORDS_BIGENDIAN
  (void) memcpy(xp, ip, X_SIZEOF_DOUBLE);
#else
  swap8b(xp, ip);
#endif
}

#elif vax

/* What IEEE double precision floating point looks like on a Vax */
struct  ieee_double {
  unsigned int  exp_hi   : 7;
  unsigned int  sign     : 1;
  unsigned int  mant_6   : 4;
  unsigned int  exp_lo   : 4;
  unsigned int  mant_5   : 8;
  unsigned int  mant_4   : 8;

  unsigned int  mant_lo  : 32;
};

/* Vax double precision floating point */
struct  vax_double {
  unsigned int  mantissa1 : 7;
  unsigned int  exp       : 8;
  unsigned int  sign      : 1;
  unsigned int  mantissa2 : 16;
  unsigned int  mantissa3 : 16;
  unsigned int  mantissa4 : 16;
};

#define VAX_DBL_BIAS  0x81
#define IEEE_DBL_BIAS 0x3ff
#define MASK(nbits) ((1 << nbits) - 1)

static const struct dbl_limits {
  struct  vax_double d;
  struct  ieee_double ieee;
} dbl_limits[2] = {
  {{ 0x7f, 0xff, 0x0, 0xffff, 0xffff, 0xffff }, /* Max Vax */
  { 0x7f, 0x0, 0x0, 0xf, 0x0, 0x0, 0x0}}, /* Max IEEE */
  {{ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},   /* Min Vax */
  { 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}}, /* Min IEEE */
};


static void
get_ix_double(const void *xp, double *ip)
{
  struct vax_double *const vdp =
       (struct vax_double *)ip;
  const struct ieee_double *const idp =
       (const struct ieee_double *) xp;
  {
    const struct dbl_limits *lim;
    int ii;
    for (ii = 0, lim = dbl_limits;
      ii < sizeof(dbl_limits)/sizeof(struct dbl_limits);
      ii++, lim++)
    {
      if ((idp->mant_lo == lim->ieee.mant_lo)
        && (idp->mant_4 == lim->ieee.mant_4)
        && (idp->mant_5 == lim->ieee.mant_5)
        && (idp->mant_6 == lim->ieee.mant_6)
        && (idp->exp_lo == lim->ieee.exp_lo)
        && (idp->exp_hi == lim->ieee.exp_hi)
        )
      {
        *vdp = lim->d;
        goto doneit;
      }
    }
  }
  {
    unsigned exp = idp->exp_hi << 4 | idp->exp_lo;
    vdp->exp = exp - IEEE_DBL_BIAS + VAX_DBL_BIAS;
  }
  {
    unsigned mant_hi = ((idp->mant_6 << 16)
         | (idp->mant_5 << 8)
         | idp->mant_4);
    unsigned mant_lo = SWAP4(idp->mant_lo);
    vdp->mantissa1 = (mant_hi >> 13);
    vdp->mantissa2 = ((mant_hi & MASK(13)) << 3)
        | (mant_lo >> 29);
    vdp->mantissa3 = (mant_lo >> 13);
    vdp->mantissa4 = (mant_lo << 3);
  }
  doneit:
    vdp->sign = idp->sign;

}


static void
put_ix_double(void *xp, const double *ip)
{
  const struct vax_double *const vdp = 
      (const struct vax_double *)ip;
  struct ieee_double *const idp =
       (struct ieee_double *) xp;

  if ((vdp->mantissa4 > (dbl_limits[0].d.mantissa4 - 3)) &&
    (vdp->mantissa3 == dbl_limits[0].d.mantissa3) &&
    (vdp->mantissa2 == dbl_limits[0].d.mantissa2) &&
    (vdp->mantissa1 == dbl_limits[0].d.mantissa1) &&
    (vdp->exp == dbl_limits[0].d.exp))
  {
    *idp = dbl_limits[0].ieee;
    goto shipit;
  }
  if ((vdp->mantissa4 == dbl_limits[1].d.mantissa4) &&
    (vdp->mantissa3 == dbl_limits[1].d.mantissa3) &&
    (vdp->mantissa2 == dbl_limits[1].d.mantissa2) &&
    (vdp->mantissa1 == dbl_limits[1].d.mantissa1) &&
    (vdp->exp == dbl_limits[1].d.exp))
  {
    *idp = dbl_limits[1].ieee;
    goto shipit;
  }

  {
    unsigned exp = vdp->exp - VAX_DBL_BIAS + IEEE_DBL_BIAS;

    unsigned mant_lo = ((vdp->mantissa2 & MASK(3)) << 29) |
      (vdp->mantissa3 << 13) |
      ((vdp->mantissa4 >> 3) & MASK(13));

    unsigned mant_hi = (vdp->mantissa1 << 13)
         | (vdp->mantissa2 >> 3);

    if((vdp->mantissa4 & 7) > 4)
    {
      /* round up */
      mant_lo++;
      if(mant_lo == 0)
      {
        mant_hi++;
        if(mant_hi > 0xffffff)
        {
          mant_hi = 0;
          exp++;
        }
      }
    }

    idp->mant_lo = SWAP4(mant_lo);
    idp->mant_6 = mant_hi >> 16;
    idp->mant_5 = (mant_hi & 0xff00) >> 8;
    idp->mant_4 = mant_hi;
    idp->exp_hi = exp >> 4;
    idp->exp_lo = exp;
  }
    
  shipit:
    idp->sign = vdp->sign;

}

  /* vax */
#elif defined(_CRAY) && !defined(__crayx1)

static void
get_ix_double(const void *xp, double *ip)
{
  const ieee_double *idp = (const ieee_double *) xp;
  cray_single *csp = (cray_single *) ip;

  if(idp->exp == 0)
  {
    /* ieee subnormal */
    *ip = (double)idp->mant;
    if(idp->mant != 0)
    {
      csp->exp -= (ieee_double_bias + 51);
    }
  }
  else
  {
    csp->exp  = idp->exp + cs_id_bias + 1;
    csp->mant = idp->mant >> (52 - 48 + 1);
    csp->mant |= (1 << (48 - 1));
  }
  csp->sign = idp->sign;
}

static void
put_ix_double(void *xp, const double *ip)
{
  ieee_double *idp = (ieee_double *) xp;
  const cray_single *csp = (const cray_single *) ip;

  int ieee_exp = csp->exp - cs_id_bias -1;

  idp->sign = csp->sign;

  if(ieee_exp >= 0x7ff)
  {
    /* NC_ERANGE => ieee Inf */
    idp->exp = 0x7ff;
    idp->mant = 0x0;
  }
  else if(ieee_exp > 0)
  {
    /* normal ieee representation */
    idp->exp  = ieee_exp;
    /* assumes cray rep is in normal form */
    assert(csp->mant & 0x800000000000);
    idp->mant = (((csp->mant << 1) &
        0xffffffffffff) << (52 - 48));
  }
  else if(ieee_exp >= (-(52 -48)))
  {
    /* ieee subnormal, left shift */
    const int lshift = (52 - 48) + ieee_exp;
    idp->mant = csp->mant << lshift;
    idp->exp  = 0;
  }
  else if(ieee_exp >= -52)
  {
    /* ieee subnormal, right shift */
    const int rshift = (- (52 - 48) - ieee_exp);

    idp->mant = csp->mant >> rshift;

#if 0
    if(csp->mant & (1 << (rshift -1)))
    {
      /* round up */
      idp->mant++;
    }
#endif

    idp->exp  = 0;
  }
  else
  {
    /* smaller than ieee can represent */
    idp->exp = 0;
    idp->mant = 0;
  }
}
#elif _SX && _FLOAT2
static void
get_ix_double(const void *xp, double *ip)
{
  const int ncnv = ie3_fl2(xp, ip, 8, 8, 1);
}

static void
put_ix_double(void *xp, const double *ip)
{
  const int ncnv = fl2_ie3(ip, xp, 8, 8, 1);
}
#else
#error "ix_double implementation"
#endif

int
ncx_get_double_schar(const void *xp, schar *ip)
{
  double xx;
  get_ix_double(xp, &xx);
  *ip = (schar) xx;
  if(xx > SCHAR_MAX || xx < SCHAR_MIN)
    return NC_ERANGE;
  return ENOERR;
}

int
ncx_get_double_uchar(const void *xp, uchar *ip)
{
  double xx;
  get_ix_double(xp, &xx);
  *ip = (uchar) xx;
  if(xx > UCHAR_MAX || xx < 0)
    return NC_ERANGE;
  return ENOERR;
}

int
ncx_get_double_short(const void *xp, short *ip)
{
  double xx;
  get_ix_double(xp, &xx);
  *ip = (short) xx;
  if(xx > SHORT_MAX || xx < SHORT_MIN)
    return NC_ERANGE;
  return ENOERR;
}

int
ncx_get_double_int(const void *xp, int *ip)
{
  double xx;
  get_ix_double(xp, &xx);
  *ip = (int) xx;
  if(xx > INT_MAX || xx < INT_MIN)
    return NC_ERANGE;
  return ENOERR;
}

int
ncx_get_double_long(const void *xp, long *ip)
{
  double xx;
  get_ix_double(xp, &xx);
  *ip = (long) xx;
  if(xx > LONG_MAX || xx < LONG_MIN)
    return NC_ERANGE;
  return ENOERR;
}

int
ncx_get_double_float(const void *xp, float *ip)
{
  double xx;
  get_ix_double(xp, &xx);
  if(xx > FLT_MAX || xx < (-FLT_MAX))
  {
    *ip = FLT_MAX;
    return NC_ERANGE;
  }
  if(xx < (-FLT_MAX))
  {
    *ip = (-FLT_MAX);
    return NC_ERANGE;
  }
  *ip = (float) xx;
  return ENOERR;
}

int
ncx_get_double_double(const void *xp, double *ip)
{
  /* TODO */
  get_ix_double(xp, ip);
  return ENOERR;
}


int
ncx_put_double_schar(void *xp, const schar *ip)
{
  double xx = (double) *ip;
  put_ix_double(xp, &xx);
  return ENOERR;
}

int
ncx_put_double_uchar(void *xp, const uchar *ip)
{
  double xx = (double) *ip;
  put_ix_double(xp, &xx);
  return ENOERR;
}

int
ncx_put_double_short(void *xp, const short *ip)
{
  double xx = (double) *ip;
  put_ix_double(xp, &xx);
#if 0 /* TODO: figure this out */
  if((double)(*ip) > X_DOUBLE_MAX || (double)(*ip) < X_DOUBLE_MIN)
    return NC_ERANGE;
#endif
  return ENOERR;
}

int
ncx_put_double_int(void *xp, const int *ip)
{
  double xx = (double) *ip;
  put_ix_double(xp, &xx);
#if 0 /* TODO: figure this out */
  if((double)(*ip) > X_DOUBLE_MAX || (double)(*ip) < X_DOUBLE_MIN)
    return NC_ERANGE;
#endif
  return ENOERR;
}

int
ncx_put_double_long(void *xp, const long *ip)
{
  double xx = (double) *ip;
  put_ix_double(xp, &xx);
#if 1 /* TODO: figure this out */
  if((double)(*ip) > X_DOUBLE_MAX || (double)(*ip) < X_DOUBLE_MIN)
    return NC_ERANGE;
#endif
  return ENOERR;
}

int
ncx_put_double_float(void *xp, const float *ip)
{
  double xx = (double) *ip;
  put_ix_double(xp, &xx);
#if 1 /* TODO: figure this out */
  if((double)(*ip) > X_DOUBLE_MAX || (double)(*ip) < X_DOUBLE_MIN)
    return NC_ERANGE;
#endif
  return ENOERR;
}

int
ncx_put_double_double(void *xp, const double *ip)
{
  put_ix_double(xp, ip);
#ifdef NO_IEEE_FLOAT
  if(*ip > X_DOUBLE_MAX || *ip < X_DOUBLE_MIN)
    return NC_ERANGE;
#endif
  return ENOERR;
}


/* x_size_t */

#if SIZEOF_SIZE_T < X_SIZEOF_SIZE_T
#error "x_size_t implementation"
/* netcdf requires size_t which can hold values from 0 to 2^32 -1 */
#endif

int
ncx_put_size_t(void **xpp, const size_t *ulp)
{
  /* similar to put_ix_int() */
  uchar *cp = (uchar *) *xpp;
#if SIZEOF_SIZE_T != X_SIZEOF_INT
  assert(*ulp <= X_SIZE_MAX);
#endif

  *cp++ = (uchar)((*ulp) >> 24);
  *cp++ = (uchar)(((*ulp) & 0x00ff0000) >> 16);
  *cp++ = (uchar)(((*ulp) & 0x0000ff00) >>  8);
  *cp   = (uchar)((*ulp) & 0x000000ff);

  *xpp = (void *)((char *)(*xpp) + X_SIZEOF_SIZE_T);
  return ENOERR;
}

int
ncx_get_size_t(const void **xpp,  size_t *ulp)
{
  /* similar to get_ix_int */
  const uchar *cp = (const uchar *) *xpp;

  *ulp = (unsigned)(*cp++ << 24);
  *ulp |= (*cp++ << 16);
  *ulp |= (*cp++ << 8);
  *ulp |= *cp; 

  *xpp = (const void *)((const char *)(*xpp) + X_SIZEOF_SIZE_T);
  return ENOERR;
}

/* x_off_t */

int
ncx_put_off_t(void **xpp, const off_t *lp, size_t sizeof_off_t)
{
  /* similar to put_ix_int() */
  uchar *cp = (uchar *) *xpp;
    /* No negative offsets stored in netcdf */
  if (*lp < 0) {
    /* Assume this is an overflow of a 32-bit int... */
    return ERANGE;
  }
    
  assert(sizeof_off_t == 4 || sizeof_off_t == 8);

  if (sizeof_off_t == 4) {
    *cp++ = (uchar) ((*lp)               >> 24);
    *cp++ = (uchar)(((*lp) & 0x00ff0000) >> 16);
    *cp++ = (uchar)(((*lp) & 0x0000ff00) >>  8);
    *cp   = (uchar)( (*lp) & 0x000000ff);
  } else {
#if SIZEOF_OFF_T == 4
/* Write a 64-bit offset on a system with only a 32-bit offset */
    *cp++ = (uchar)0;
    *cp++ = (uchar)0;
    *cp++ = (uchar)0;
    *cp++ = (uchar)0;

    *cp++ = (uchar)(((*lp) & 0xff000000) >> 24);
    *cp++ = (uchar)(((*lp) & 0x00ff0000) >> 16);
    *cp++ = (uchar)(((*lp) & 0x0000ff00) >>  8);
    *cp   = (uchar)( (*lp) & 0x000000ff);
#else
    *cp++ = (uchar) ((*lp)                          >> 56);
    *cp++ = (uchar)(((*lp) & 0x00ff000000000000ULL) >> 48);
    *cp++ = (uchar)(((*lp) & 0x0000ff0000000000ULL) >> 40);
    *cp++ = (uchar)(((*lp) & 0x000000ff00000000ULL) >> 32);
    *cp++ = (uchar)(((*lp) & 0x00000000ff000000ULL) >> 24);
    *cp++ = (uchar)(((*lp) & 0x0000000000ff0000ULL) >> 16);
    *cp++ = (uchar)(((*lp) & 0x000000000000ff00ULL) >>  8);
    *cp   = (uchar)( (*lp) & 0x00000000000000ffULL);
#endif
  }
  *xpp = (void *)((char *)(*xpp) + sizeof_off_t);
  return ENOERR;
}

int
ncx_get_off_t(const void **xpp, off_t *lp, size_t sizeof_off_t)
{
  /* similar to get_ix_int() */
  const uchar *cp = (const uchar *) *xpp;
  assert(sizeof_off_t == 4 || sizeof_off_t == 8);

  if (sizeof_off_t == 4) {
    *lp = *cp++ << 24;
    *lp |= (*cp++ << 16);
    *lp |= (*cp++ <<  8);
    *lp |= *cp; 
  } else {
#if SIZEOF_OFF_T == 4
/* Read a 64-bit offset on a system with only a 32-bit offset */
/* If the offset overflows, set an error code and return */
    *lp =  ((off_t)(*cp++) << 24);
    *lp |= ((off_t)(*cp++) << 16);
    *lp |= ((off_t)(*cp++) <<  8);
    *lp |= ((off_t)(*cp++));
/*
 * lp now contains the upper 32-bits of the 64-bit offset.  if lp is
 * not zero, then the dataset is larger than can be represented
 * on this system.  Set an error code and return.
 */
    if (*lp != 0) {
      return ERANGE;
    }

    *lp  = ((off_t)(*cp++) << 24);
    *lp |= ((off_t)(*cp++) << 16);
    *lp |= ((off_t)(*cp++) <<  8);
    *lp |=  (off_t)*cp;

    if (*lp < 0) {
      /*
       * If this fails, then the offset is >2^31, but less
       * than 2^32 which is not allowed, but is not caught
       * by the previous check
       */
      return ERANGE;
    }
#else
    *lp =  ((off_t)(*cp++) << 56);
    *lp |= ((off_t)(*cp++) << 48);
    *lp |= ((off_t)(*cp++) << 40);
    *lp |= ((off_t)(*cp++) << 32);
    *lp |= ((off_t)(*cp++) << 24);
    *lp |= ((off_t)(*cp++) << 16);
    *lp |= ((off_t)(*cp++) <<  8);
    *lp |=  (off_t)*cp;
#endif
  }
  *xpp = (const void *)((const char *)(*xpp) + sizeof_off_t);
  return ENOERR;
}


/*
 * Aggregate numeric conversion functions.
 */



/* schar */

int
ncx_getn_schar_schar(const void **xpp, size_t nelems, schar *tp)
{
    (void) memcpy(tp, *xpp, nelems);
  *xpp = (void *)((char *)(*xpp) + nelems);
  return ENOERR;

}
int
ncx_getn_schar_uchar(const void **xpp, size_t nelems, uchar *tp)
{
    (void) memcpy(tp, *xpp, nelems);
  *xpp = (void *)((char *)(*xpp) + nelems);
  return ENOERR;

}
int
ncx_getn_schar_short(const void **xpp, size_t nelems, short *tp)
{
  schar *xp = (schar *)(*xpp);

  while(nelems-- != 0)
  {
    *tp++ = *xp++;
  }

  *xpp = (const void *)xp;
  return ENOERR;
}

int
ncx_getn_schar_int(const void **xpp, size_t nelems, int *tp)
{
  schar *xp = (schar *)(*xpp);

  while(nelems-- != 0)
  {
    *tp++ = *xp++;
  }

  *xpp = (const void *)xp;
  return ENOERR;
}

int
ncx_getn_schar_long(const void **xpp, size_t nelems, long *tp)
{
  schar *xp = (schar *)(*xpp);

  while(nelems-- != 0)
  {
    *tp++ = *xp++;
  }

  *xpp = (const void *)xp;
  return ENOERR;
}

int
ncx_getn_schar_float(const void **xpp, size_t nelems, float *tp)
{
  schar *xp = (schar *)(*xpp);

  while(nelems-- != 0)
  {
    *tp++ = *xp++;
  }

  *xpp = (const void *)xp;
  return ENOERR;
}

int
ncx_getn_schar_double(const void **xpp, size_t nelems, double *tp)
{
  schar *xp = (schar *)(*xpp);

  while(nelems-- != 0)
  {
    *tp++ = *xp++;
  }

  *xpp = (const void *)xp;
  return ENOERR;
}


int
ncx_pad_getn_schar_schar(const void **xpp, size_t nelems, schar *tp)
{
    size_t rndup = nelems % X_ALIGN;

  if(rndup)
    rndup = X_ALIGN - rndup;

  (void) memcpy(tp, *xpp, nelems);
  *xpp = (void *)((char *)(*xpp) + nelems + rndup);

  return ENOERR;

}
int
ncx_pad_getn_schar_uchar(const void **xpp, size_t nelems, uchar *tp)
{
    size_t rndup = nelems % X_ALIGN;

  if(rndup)
    rndup = X_ALIGN - rndup;

  (void) memcpy(tp, *xpp, nelems);
  *xpp = (void *)((char *)(*xpp) + nelems + rndup);

  return ENOERR;

}
int
ncx_pad_getn_schar_short(const void **xpp, size_t nelems, short *tp)
{
  size_t rndup = nelems % X_ALIGN;
  schar *xp = (schar *) *xpp;

  if(rndup)
    rndup = X_ALIGN - rndup;

  while(nelems-- != 0)
  {
    *tp++ = *xp++;
  }

  *xpp = (void *)(xp + rndup);
  return ENOERR;
}

int
ncx_pad_getn_schar_int(const void **xpp, size_t nelems, int *tp)
{
  size_t rndup = nelems % X_ALIGN;
  schar *xp = (schar *) *xpp;

  if(rndup)
    rndup = X_ALIGN - rndup;

  while(nelems-- != 0)
  {
    *tp++ = *xp++;
  }

  *xpp = (void *)(xp + rndup);
  return ENOERR;
}

int
ncx_pad_getn_schar_long(const void **xpp, size_t nelems, long *tp)
{
  size_t rndup = nelems % X_ALIGN;
  schar *xp = (schar *) *xpp;

  if(rndup)
    rndup = X_ALIGN - rndup;

  while(nelems-- != 0)
  {
    *tp++ = *xp++;
  }

  *xpp = (void *)(xp + rndup);
  return ENOERR;
}

int
ncx_pad_getn_schar_float(const void **xpp, size_t nelems, float *tp)
{
  size_t rndup = nelems % X_ALIGN;
  schar *xp = (schar *) *xpp;

  if(rndup)
    rndup = X_ALIGN - rndup;

  while(nelems-- != 0)
  {
    *tp++ = *xp++;
  }

  *xpp = (void *)(xp + rndup);
  return ENOERR;
}

int
ncx_pad_getn_schar_double(const void **xpp, size_t nelems, double *tp)
{
  size_t rndup = nelems % X_ALIGN;
  schar *xp = (schar *) *xpp;

  if(rndup)
    rndup = X_ALIGN - rndup;

  while(nelems-- != 0)
  {
    *tp++ = *xp++;
  }

  *xpp = (void *)(xp + rndup);
  return ENOERR;
}


int
ncx_putn_schar_schar(void **xpp, size_t nelems, const schar *tp)
{
    (void) memcpy(*xpp, tp, nelems);
  *xpp = (void *)((char *)(*xpp) + nelems);

  return ENOERR;

}
int
ncx_putn_schar_uchar(void **xpp, size_t nelems, const uchar *tp)
{
    (void) memcpy(*xpp, tp, nelems);
  *xpp = (void *)((char *)(*xpp) + nelems);

  return ENOERR;

}
int
ncx_putn_schar_short(void **xpp, size_t nelems, const short *tp)
{
  int status = ENOERR;
  schar *xp = (schar *) *xpp;

  while(nelems-- != 0)
  {
    if(*tp > X_SCHAR_MAX || *tp < X_SCHAR_MIN)
      status = NC_ERANGE;
    *xp++ = (schar) *tp++;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_putn_schar_int(void **xpp, size_t nelems, const int *tp)
{
  int status = ENOERR;
  schar *xp = (schar *) *xpp;

  while(nelems-- != 0)
  {
    if(*tp > X_SCHAR_MAX || *tp < X_SCHAR_MIN)
      status = NC_ERANGE;
    *xp++ = (schar) *tp++;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_putn_schar_long(void **xpp, size_t nelems, const long *tp)
{
  int status = ENOERR;
  schar *xp = (schar *) *xpp;

  while(nelems-- != 0)
  {
    if(*tp > X_SCHAR_MAX || *tp < X_SCHAR_MIN)
      status = NC_ERANGE;
    *xp++ = (schar) *tp++;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_putn_schar_float(void **xpp, size_t nelems, const float *tp)
{
  int status = ENOERR;
  schar *xp = (schar *) *xpp;

  while(nelems-- != 0)
  {
    if(*tp > X_SCHAR_MAX || *tp < X_SCHAR_MIN)
      status = NC_ERANGE;
    *xp++ = (schar) *tp++;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_putn_schar_double(void **xpp, size_t nelems, const double *tp)
{
  int status = ENOERR;
  schar *xp = (schar *) *xpp;

  while(nelems-- != 0)
  {
    if(*tp > X_SCHAR_MAX || *tp < X_SCHAR_MIN)
      status = NC_ERANGE;
    *xp++ = (schar) *tp++;
  }

  *xpp = (void *)xp;
  return status;
}


int
ncx_pad_putn_schar_schar(void **xpp, size_t nelems, const schar *tp)
{
    size_t rndup = nelems % X_ALIGN;

  if(rndup)
    rndup = X_ALIGN - rndup;

  (void) memcpy(*xpp, tp, nelems);
  *xpp = (void *)((char *)(*xpp) + nelems);

  if(rndup)
  {
    (void) memcpy(*xpp, nada, rndup);
    *xpp = (void *)((char *)(*xpp) + rndup);
  }
  
  return ENOERR;

}
int
ncx_pad_putn_schar_uchar(void **xpp, size_t nelems, const uchar *tp)
{
    size_t rndup = nelems % X_ALIGN;

  if(rndup)
    rndup = X_ALIGN - rndup;

  (void) memcpy(*xpp, tp, nelems);
  *xpp = (void *)((char *)(*xpp) + nelems);

  if(rndup)
  {
    (void) memcpy(*xpp, nada, rndup);
    *xpp = (void *)((char *)(*xpp) + rndup);
  }
  
  return ENOERR;

}
int
ncx_pad_putn_schar_short(void **xpp, size_t nelems, const short *tp)
{
  int status = ENOERR;
  size_t rndup = nelems % X_ALIGN;
  schar *xp = (schar *) *xpp;

  if(rndup)
    rndup = X_ALIGN - rndup;

  while(nelems-- != 0)
  {
    /* N.B. schar as signed */
    if(*tp > X_SCHAR_MAX || *tp < X_SCHAR_MIN)
      status = NC_ERANGE;
    *xp++ = (schar) *tp++;
  }


  if(rndup)
  {
    (void) memcpy(xp, nada, rndup);
    xp += rndup;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_pad_putn_schar_int(void **xpp, size_t nelems, const int *tp)
{
  int status = ENOERR;
  size_t rndup = nelems % X_ALIGN;
  schar *xp = (schar *) *xpp;

  if(rndup)
    rndup = X_ALIGN - rndup;

  while(nelems-- != 0)
  {
    /* N.B. schar as signed */
    if(*tp > X_SCHAR_MAX || *tp < X_SCHAR_MIN)
      status = NC_ERANGE;
    *xp++ = (schar) *tp++;
  }


  if(rndup)
  {
    (void) memcpy(xp, nada, rndup);
    xp += rndup;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_pad_putn_schar_long(void **xpp, size_t nelems, const long *tp)
{
  int status = ENOERR;
  size_t rndup = nelems % X_ALIGN;
  schar *xp = (schar *) *xpp;

  if(rndup)
    rndup = X_ALIGN - rndup;

  while(nelems-- != 0)
  {
    /* N.B. schar as signed */
    if(*tp > X_SCHAR_MAX || *tp < X_SCHAR_MIN)
      status = NC_ERANGE;
    *xp++ = (schar) *tp++;
  }


  if(rndup)
  {
    (void) memcpy(xp, nada, rndup);
    xp += rndup;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_pad_putn_schar_float(void **xpp, size_t nelems, const float *tp)
{
  int status = ENOERR;
  size_t rndup = nelems % X_ALIGN;
  schar *xp = (schar *) *xpp;

  if(rndup)
    rndup = X_ALIGN - rndup;

  while(nelems-- != 0)
  {
    /* N.B. schar as signed */
    if(*tp > X_SCHAR_MAX || *tp < X_SCHAR_MIN)
      status = NC_ERANGE;
    *xp++ = (schar) *tp++;
  }


  if(rndup)
  {
    (void) memcpy(xp, nada, rndup);
    xp += rndup;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_pad_putn_schar_double(void **xpp, size_t nelems, const double *tp)
{
  int status = ENOERR;
  size_t rndup = nelems % X_ALIGN;
  schar *xp = (schar *) *xpp;

  if(rndup)
    rndup = X_ALIGN - rndup;

  while(nelems-- != 0)
  {
    /* N.B. schar as signed */
    if(*tp > X_SCHAR_MAX || *tp < X_SCHAR_MIN)
      status = NC_ERANGE;
    *xp++ = (schar) *tp++;
  }


  if(rndup)
  {
    (void) memcpy(xp, nada, rndup);
    xp += rndup;
  }

  *xpp = (void *)xp;
  return status;
}



/* short */

int
ncx_getn_short_schar(const void **xpp, size_t nelems, schar *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    const int lstatus = ncx_get_short_schar(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

int
ncx_getn_short_uchar(const void **xpp, size_t nelems, uchar *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    const int lstatus = ncx_get_short_uchar(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

#if X_SIZEOF_SHORT == SIZEOF_SHORT
/* optimized version */
int
ncx_getn_short_short(const void **xpp, size_t nelems, short *tp)
{
#ifdef WORDS_BIGENDIAN
  (void) memcpy(tp, *xpp, nelems * sizeof(short));
# else
  swapn2b(tp, *xpp, nelems);
# endif
  *xpp = (const void *)((const char *)(*xpp) + nelems * X_SIZEOF_SHORT);
  return ENOERR;
}
#else
int
ncx_getn_short_short(const void **xpp, size_t nelems, short *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    const int lstatus = ncx_get_short_short(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

#endif
int
ncx_getn_short_int(const void **xpp, size_t nelems, int *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    const int lstatus = ncx_get_short_int(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

int
ncx_getn_short_long(const void **xpp, size_t nelems, long *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    const int lstatus = ncx_get_short_long(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

int
ncx_getn_short_float(const void **xpp, size_t nelems, float *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    const int lstatus = ncx_get_short_float(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

int
ncx_getn_short_double(const void **xpp, size_t nelems, double *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    const int lstatus = ncx_get_short_double(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}


int
ncx_pad_getn_short_schar(const void **xpp, size_t nelems, schar *tp)
{
  const size_t rndup = nelems % 2;

  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    const int lstatus = ncx_get_short_schar(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  if(rndup != 0)
    xp += X_SIZEOF_SHORT;
    
  *xpp = (void *)xp;
  return status;
}

int
ncx_pad_getn_short_uchar(const void **xpp, size_t nelems, uchar *tp)
{
  const size_t rndup = nelems % 2;

  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    const int lstatus = ncx_get_short_uchar(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  if(rndup != 0)
    xp += X_SIZEOF_SHORT;
    
  *xpp = (void *)xp;
  return status;
}

int
ncx_pad_getn_short_short(const void **xpp, size_t nelems, short *tp)
{
  const size_t rndup = nelems % 2;

  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    const int lstatus = ncx_get_short_short(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  if(rndup != 0)
    xp += X_SIZEOF_SHORT;
    
  *xpp = (void *)xp;
  return status;
}

int
ncx_pad_getn_short_int(const void **xpp, size_t nelems, int *tp)
{
  const size_t rndup = nelems % 2;

  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    const int lstatus = ncx_get_short_int(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  if(rndup != 0)
    xp += X_SIZEOF_SHORT;
    
  *xpp = (void *)xp;
  return status;
}

int
ncx_pad_getn_short_long(const void **xpp, size_t nelems, long *tp)
{
  const size_t rndup = nelems % 2;

  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    const int lstatus = ncx_get_short_long(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  if(rndup != 0)
    xp += X_SIZEOF_SHORT;
    
  *xpp = (void *)xp;
  return status;
}

int
ncx_pad_getn_short_float(const void **xpp, size_t nelems, float *tp)
{
  const size_t rndup = nelems % 2;

  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    const int lstatus = ncx_get_short_float(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  if(rndup != 0)
    xp += X_SIZEOF_SHORT;
    
  *xpp = (void *)xp;
  return status;
}

int
ncx_pad_getn_short_double(const void **xpp, size_t nelems, double *tp)
{
  const size_t rndup = nelems % 2;

  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    const int lstatus = ncx_get_short_double(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  if(rndup != 0)
    xp += X_SIZEOF_SHORT;
    
  *xpp = (void *)xp;
  return status;
}


int
ncx_putn_short_schar(void **xpp, size_t nelems, const schar *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    int lstatus = ncx_put_short_schar(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_putn_short_uchar(void **xpp, size_t nelems, const uchar *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    int lstatus = ncx_put_short_uchar(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

#if X_SIZEOF_SHORT == SIZEOF_SHORT
/* optimized version */
int
ncx_putn_short_short(void **xpp, size_t nelems, const short *tp)
{
#ifdef WORDS_BIGENDIAN
  (void) memcpy(*xpp, tp, nelems * X_SIZEOF_SHORT);
# else
  swapn2b(*xpp, tp, nelems);
# endif
  *xpp = (void *)((char *)(*xpp) + nelems * X_SIZEOF_SHORT);
  return ENOERR;
}
#else
int
ncx_putn_short_short(void **xpp, size_t nelems, const short *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    int lstatus = ncx_put_short_short(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

#endif
int
ncx_putn_short_int(void **xpp, size_t nelems, const int *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    int lstatus = ncx_put_short_int(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_putn_short_long(void **xpp, size_t nelems, const long *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    int lstatus = ncx_put_short_long(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_putn_short_float(void **xpp, size_t nelems, const float *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    int lstatus = ncx_put_short_float(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_putn_short_double(void **xpp, size_t nelems, const double *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    int lstatus = ncx_put_short_double(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}


int
ncx_pad_putn_short_schar(void **xpp, size_t nelems, const schar *tp)
{
  const size_t rndup = nelems % 2;

  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    int lstatus = ncx_put_short_schar(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  if(rndup != 0)
  {
    (void) memcpy(xp, nada, X_SIZEOF_SHORT);
    xp += X_SIZEOF_SHORT; 
  }
    
  *xpp = (void *)xp;
  return status;
}

int
ncx_pad_putn_short_uchar(void **xpp, size_t nelems, const uchar *tp)
{
  const size_t rndup = nelems % 2;

  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    int lstatus = ncx_put_short_uchar(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  if(rndup != 0)
  {
    (void) memcpy(xp, nada, X_SIZEOF_SHORT);
    xp += X_SIZEOF_SHORT; 
  }
    
  *xpp = (void *)xp;
  return status;
}

int
ncx_pad_putn_short_short(void **xpp, size_t nelems, const short *tp)
{
  const size_t rndup = nelems % 2;

  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    int lstatus = ncx_put_short_short(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  if(rndup != 0)
  {
    (void) memcpy(xp, nada, X_SIZEOF_SHORT);
    xp += X_SIZEOF_SHORT; 
  }
    
  *xpp = (void *)xp;
  return status;
}

int
ncx_pad_putn_short_int(void **xpp, size_t nelems, const int *tp)
{
  const size_t rndup = nelems % 2;

  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    int lstatus = ncx_put_short_int(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  if(rndup != 0)
  {
    (void) memcpy(xp, nada, X_SIZEOF_SHORT);
    xp += X_SIZEOF_SHORT; 
  }
    
  *xpp = (void *)xp;
  return status;
}

int
ncx_pad_putn_short_long(void **xpp, size_t nelems, const long *tp)
{
  const size_t rndup = nelems % 2;

  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    int lstatus = ncx_put_short_long(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  if(rndup != 0)
  {
    (void) memcpy(xp, nada, X_SIZEOF_SHORT);
    xp += X_SIZEOF_SHORT; 
  }
    
  *xpp = (void *)xp;
  return status;
}

int
ncx_pad_putn_short_float(void **xpp, size_t nelems, const float *tp)
{
  const size_t rndup = nelems % 2;

  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    int lstatus = ncx_put_short_float(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  if(rndup != 0)
  {
    (void) memcpy(xp, nada, X_SIZEOF_SHORT);
    xp += X_SIZEOF_SHORT; 
  }
    
  *xpp = (void *)xp;
  return status;
}

int
ncx_pad_putn_short_double(void **xpp, size_t nelems, const double *tp)
{
  const size_t rndup = nelems % 2;

  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_SHORT, tp++)
  {
    int lstatus = ncx_put_short_double(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  if(rndup != 0)
  {
    (void) memcpy(xp, nada, X_SIZEOF_SHORT);
    xp += X_SIZEOF_SHORT; 
  }
    
  *xpp = (void *)xp;
  return status;
}



/* int */

int
ncx_getn_int_schar(const void **xpp, size_t nelems, schar *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_INT, tp++)
  {
    const int lstatus = ncx_get_int_schar(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

int
ncx_getn_int_uchar(const void **xpp, size_t nelems, uchar *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_INT, tp++)
  {
    const int lstatus = ncx_get_int_uchar(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

int
ncx_getn_int_short(const void **xpp, size_t nelems, short *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_INT, tp++)
  {
    const int lstatus = ncx_get_int_short(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

#if X_SIZEOF_INT == SIZEOF_INT
/* optimized version */
int
ncx_getn_int_int(const void **xpp, size_t nelems, int *tp)
{
#ifdef WORDS_BIGENDIAN
  (void) memcpy(tp, *xpp, nelems * sizeof(int));
# else
  swapn4b(tp, *xpp, nelems);
# endif
  *xpp = (const void *)((const char *)(*xpp) + nelems * X_SIZEOF_INT);
  return ENOERR;
}
#else
int
ncx_getn_int_int(const void **xpp, size_t nelems, int *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_INT, tp++)
  {
    const int lstatus = ncx_get_int_int(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

#endif
#if X_SIZEOF_INT == SIZEOF_LONG
/* optimized version */
int
ncx_getn_int_long(const void **xpp, size_t nelems, long *tp)
{
#ifdef WORDS_BIGENDIAN
  (void) memcpy(tp, *xpp, nelems * sizeof(long));
# else
  swapn4b(tp, *xpp, nelems);
# endif
  *xpp = (const void *)((const char *)(*xpp) + nelems * X_SIZEOF_INT);
  return ENOERR;
}
#else
int
ncx_getn_int_long(const void **xpp, size_t nelems, long *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_INT, tp++)
  {
    const int lstatus = ncx_get_int_long(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

#endif
int
ncx_getn_int_float(const void **xpp, size_t nelems, float *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_INT, tp++)
  {
    const int lstatus = ncx_get_int_float(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

int
ncx_getn_int_double(const void **xpp, size_t nelems, double *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_INT, tp++)
  {
    const int lstatus = ncx_get_int_double(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}


int
ncx_putn_int_schar(void **xpp, size_t nelems, const schar *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_INT, tp++)
  {
    int lstatus = ncx_put_int_schar(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_putn_int_uchar(void **xpp, size_t nelems, const uchar *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_INT, tp++)
  {
    int lstatus = ncx_put_int_uchar(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_putn_int_short(void **xpp, size_t nelems, const short *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_INT, tp++)
  {
    int lstatus = ncx_put_int_short(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

#if X_SIZEOF_INT == SIZEOF_INT
/* optimized version */
int
ncx_putn_int_int(void **xpp, size_t nelems, const int *tp)
{
#ifdef WORDS_BIGENDIAN
  (void) memcpy(*xpp, tp, nelems * X_SIZEOF_INT);
# else
  swapn4b(*xpp, tp, nelems);
# endif
  *xpp = (void *)((char *)(*xpp) + nelems * X_SIZEOF_INT);
  return ENOERR;
}
#else
int
ncx_putn_int_int(void **xpp, size_t nelems, const int *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_INT, tp++)
  {
    int lstatus = ncx_put_int_int(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

#endif
#if X_SIZEOF_INT == SIZEOF_LONG
/* optimized version */
int
ncx_putn_int_long(void **xpp, size_t nelems, const long *tp)
{
#ifdef WORDS_BIGENDIAN
  (void) memcpy(*xpp, tp, nelems * X_SIZEOF_INT);
# else
  swapn4b(*xpp, tp, nelems);
# endif
  *xpp = (void *)((char *)(*xpp) + nelems * X_SIZEOF_INT);
  return ENOERR;
}
#else
int
ncx_putn_int_long(void **xpp, size_t nelems, const long *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_INT, tp++)
  {
    int lstatus = ncx_put_int_long(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

#endif
int
ncx_putn_int_float(void **xpp, size_t nelems, const float *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_INT, tp++)
  {
    int lstatus = ncx_put_int_float(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_putn_int_double(void **xpp, size_t nelems, const double *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_INT, tp++)
  {
    int lstatus = ncx_put_int_double(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}



/* float */

int
ncx_getn_float_schar(const void **xpp, size_t nelems, schar *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_FLOAT, tp++)
  {
    const int lstatus = ncx_get_float_schar(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

int
ncx_getn_float_uchar(const void **xpp, size_t nelems, uchar *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_FLOAT, tp++)
  {
    const int lstatus = ncx_get_float_uchar(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

int
ncx_getn_float_short(const void **xpp, size_t nelems, short *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_FLOAT, tp++)
  {
    const int lstatus = ncx_get_float_short(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

int
ncx_getn_float_int(const void **xpp, size_t nelems, int *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_FLOAT, tp++)
  {
    const int lstatus = ncx_get_float_int(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

int
ncx_getn_float_long(const void **xpp, size_t nelems, long *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_FLOAT, tp++)
  {
    const int lstatus = ncx_get_float_long(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

#if X_SIZEOF_FLOAT == SIZEOF_FLOAT && !defined(NO_IEEE_FLOAT)
/* optimized version */
int
ncx_getn_float_float(const void **xpp, size_t nelems, float *tp)
{
#ifdef WORDS_BIGENDIAN
  (void) memcpy(tp, *xpp, nelems * sizeof(float));
# else
  swapn4b(tp, *xpp, nelems);
# endif
  *xpp = (const void *)((const char *)(*xpp) + nelems * X_SIZEOF_FLOAT);
  return ENOERR;
}
#elif vax
int
ncx_getn_float_float(const void **xpp, size_t nfloats, float *ip)
{
  float *const end = ip + nfloats;

  while(ip < end)
  {
    struct vax_single *const vsp = (struct vax_single *) ip;
    const struct ieee_single *const isp =
       (const struct ieee_single *) (*xpp);
    unsigned exp = isp->exp_hi << 1 | isp->exp_lo;

    switch(exp) {
    case 0 :
      /* ieee subnormal */
      if(isp->mant_hi == min.ieee.mant_hi
        && isp->mant_lo_hi == min.ieee.mant_lo_hi
        && isp->mant_lo_lo == min.ieee.mant_lo_lo)
      {
        *vsp = min.s;
      }
      else
      {
        unsigned mantissa = (isp->mant_hi << 16)
           | isp->mant_lo_hi << 8
           | isp->mant_lo_lo;
        unsigned tmp = mantissa >> 20;
        if(tmp >= 4) {
          vsp->exp = 2;
        } else if (tmp >= 2) {
          vsp->exp = 1;
        } else {
          *vsp = min.s;
          break;
        } /* else */
        tmp = mantissa - (1 << (20 + vsp->exp ));
        tmp <<= 3 - vsp->exp;
        vsp->mantissa2 = tmp;
        vsp->mantissa1 = (tmp >> 16);
      }
      break;
    case 0xfe :
    case 0xff :
      *vsp = max.s;
      break;
    default :
      vsp->exp = exp - IEEE_SNG_BIAS + VAX_SNG_BIAS;
      vsp->mantissa2 = isp->mant_lo_hi << 8 | isp->mant_lo_lo;
      vsp->mantissa1 = isp->mant_hi;
    }

    vsp->sign = isp->sign;


    ip++;
    *xpp = (char *)(*xpp) + X_SIZEOF_FLOAT;
  }
  return ENOERR;
}
#elif _SX && _FLOAT2
int
ncx_getn_float_float(const void **xpp, size_t nelems, float *tp)
{
  const char *const xp = *xpp;

  const int ncnv = ie3_fl2(xp, tp, 4, 8, nelems);

  *xpp = xp + nelems * X_SIZEOF_FLOAT;
  return (nelems == ncnv ? ENOERR : NC_ERANGE);
}
#else
int
ncx_getn_float_float(const void **xpp, size_t nelems, float *tp)
{
  const char *xp = *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_FLOAT, tp++)
  {
    const int lstatus = ncx_get_float_float(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

#endif
int
ncx_getn_float_double(const void **xpp, size_t nelems, double *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_FLOAT, tp++)
  {
    const int lstatus = ncx_get_float_double(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}


int
ncx_putn_float_schar(void **xpp, size_t nelems, const schar *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_FLOAT, tp++)
  {
    int lstatus = ncx_put_float_schar(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_putn_float_uchar(void **xpp, size_t nelems, const uchar *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_FLOAT, tp++)
  {
    int lstatus = ncx_put_float_uchar(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_putn_float_short(void **xpp, size_t nelems, const short *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_FLOAT, tp++)
  {
    int lstatus = ncx_put_float_short(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_putn_float_int(void **xpp, size_t nelems, const int *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_FLOAT, tp++)
  {
    int lstatus = ncx_put_float_int(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_putn_float_long(void **xpp, size_t nelems, const long *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_FLOAT, tp++)
  {
    int lstatus = ncx_put_float_long(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

#if X_SIZEOF_FLOAT == SIZEOF_FLOAT && !defined(NO_IEEE_FLOAT)
/* optimized version */
int
ncx_putn_float_float(void **xpp, size_t nelems, const float *tp)
{
#ifdef WORDS_BIGENDIAN
  (void) memcpy(*xpp, tp, nelems * X_SIZEOF_FLOAT);
# else
  swapn4b(*xpp, tp, nelems);
# endif
  *xpp = (void *)((char *)(*xpp) + nelems * X_SIZEOF_FLOAT);
  return ENOERR;
}
#elif vax
int
ncx_putn_float_float(void **xpp, size_t nfloats, const float *ip)
{
  const float *const end = ip + nfloats;

  while(ip < end)
  {
    const struct vax_single *const vsp =
       (const struct vax_single *)ip;
    struct ieee_single *const isp = (struct ieee_single *) (*xpp);

    switch(vsp->exp){
    case 0 :
      /* all vax float with zero exponent map to zero */
      *isp = min.ieee;
      break;
    case 2 :
    case 1 :
    {
      /* These will map to subnormals */
      unsigned mantissa = (vsp->mantissa1 << 16)
           | vsp->mantissa2;
      mantissa >>= 3 - vsp->exp;
      mantissa += (1 << (20 + vsp->exp));
      isp->mant_lo_lo = mantissa;
      isp->mant_lo_hi = mantissa >> 8;
      isp->mant_hi = mantissa >> 16;
      isp->exp_lo = 0;
      isp->exp_hi = 0;
    }
      break;
    case 0xff : /* max.s.exp */
      if( vsp->mantissa2 == max.s.mantissa2
        && vsp->mantissa1 == max.s.mantissa1)
      {
        /* map largest vax float to ieee infinity */
        *isp = max.ieee;
        break;
      } /* else, fall thru */
    default :
    {
      unsigned exp = vsp->exp - VAX_SNG_BIAS + IEEE_SNG_BIAS;
      isp->exp_hi = exp >> 1;
      isp->exp_lo = exp;
      isp->mant_lo_lo = vsp->mantissa2;
      isp->mant_lo_hi = vsp->mantissa2 >> 8;
      isp->mant_hi = vsp->mantissa1;
    }
    }

    isp->sign = vsp->sign;

  
    ip++;
    *xpp = (char *)(*xpp) + X_SIZEOF_FLOAT;
  }
  return ENOERR;
}
#elif _SX && _FLOAT2
int
ncx_putn_float_float(void **xpp, size_t nelems, const float *tp)
{
  char *const xp = *xpp;

  const int ncnv = fl2_ie3(tp, xp, 8, 4, nelems);

  *xpp = xp + nelems * X_SIZEOF_FLOAT;
  return (nelems == ncnv ? ENOERR : NC_ERANGE);
}
#else
int
ncx_putn_float_float(void **xpp, size_t nelems, const float *tp)
{
  char *xp = *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_FLOAT, tp++)
  {
    int lstatus = ncx_put_float_float(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

#endif
int
ncx_putn_float_double(void **xpp, size_t nelems, const double *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_FLOAT, tp++)
  {
    int lstatus = ncx_put_float_double(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}



/* double */

int
ncx_getn_double_schar(const void **xpp, size_t nelems, schar *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_DOUBLE, tp++)
  {
    const int lstatus = ncx_get_double_schar(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

int
ncx_getn_double_uchar(const void **xpp, size_t nelems, uchar *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_DOUBLE, tp++)
  {
    const int lstatus = ncx_get_double_uchar(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

int
ncx_getn_double_short(const void **xpp, size_t nelems, short *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_DOUBLE, tp++)
  {
    const int lstatus = ncx_get_double_short(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

int
ncx_getn_double_int(const void **xpp, size_t nelems, int *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_DOUBLE, tp++)
  {
    const int lstatus = ncx_get_double_int(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

int
ncx_getn_double_long(const void **xpp, size_t nelems, long *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_DOUBLE, tp++)
  {
    const int lstatus = ncx_get_double_long(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

int
ncx_getn_double_float(const void **xpp, size_t nelems, float *tp)
{
  const char *xp = (const char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_DOUBLE, tp++)
  {
    const int lstatus = ncx_get_double_float(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

#if X_SIZEOF_DOUBLE == SIZEOF_DOUBLE && !defined(NO_IEEE_FLOAT)
/* optimized version */
int
ncx_getn_double_double(const void **xpp, size_t nelems, double *tp)
{
#ifdef WORDS_BIGENDIAN
  (void) memcpy(tp, *xpp, nelems * sizeof(double));
# else
  swapn8b(tp, *xpp, nelems);
# endif
  *xpp = (const void *)((const char *)(*xpp) + nelems * X_SIZEOF_DOUBLE);
  return ENOERR;
}
#elif vax
int
ncx_getn_double_double(const void **xpp, size_t ndoubles, double *ip)
{
  double *const end = ip + ndoubles;

  while(ip < end)
  {
  struct vax_double *const vdp =
       (struct vax_double *)ip;
  const struct ieee_double *const idp =
       (const struct ieee_double *) (*xpp);
  {
    const struct dbl_limits *lim;
    int ii;
    for (ii = 0, lim = dbl_limits;
      ii < sizeof(dbl_limits)/sizeof(struct dbl_limits);
      ii++, lim++)
    {
      if ((idp->mant_lo == lim->ieee.mant_lo)
        && (idp->mant_4 == lim->ieee.mant_4)
        && (idp->mant_5 == lim->ieee.mant_5)
        && (idp->mant_6 == lim->ieee.mant_6)
        && (idp->exp_lo == lim->ieee.exp_lo)
        && (idp->exp_hi == lim->ieee.exp_hi)
        )
      {
        *vdp = lim->d;
        goto doneit;
      }
    }
  }
  {
    unsigned exp = idp->exp_hi << 4 | idp->exp_lo;
    vdp->exp = exp - IEEE_DBL_BIAS + VAX_DBL_BIAS;
  }
  {
    unsigned mant_hi = ((idp->mant_6 << 16)
         | (idp->mant_5 << 8)
         | idp->mant_4);
    unsigned mant_lo = SWAP4(idp->mant_lo);
    vdp->mantissa1 = (mant_hi >> 13);
    vdp->mantissa2 = ((mant_hi & MASK(13)) << 3)
        | (mant_lo >> 29);
    vdp->mantissa3 = (mant_lo >> 13);
    vdp->mantissa4 = (mant_lo << 3);
  }
  doneit:
    vdp->sign = idp->sign;

    ip++;
    *xpp = (char *)(*xpp) + X_SIZEOF_DOUBLE;
  }
  return ENOERR;
}
  /* vax */
#elif _SX && _FLOAT2
int
ncx_getn_double_double(const void **xpp, size_t nelems, double *tp)
{
  const char *const xp = *xpp;

  const int ncnv = ie3_fl2(xp, tp, 8, 8, nelems);

  *xpp = xp + nelems * X_SIZEOF_DOUBLE;
  return (nelems == ncnv ? ENOERR : NC_ERANGE);
}
#else
int
ncx_getn_double_double(const void **xpp, size_t nelems, double *tp)
{
  const char *xp = *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_DOUBLE, tp++)
  {
    const int lstatus = ncx_get_double_double(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (const void *)xp;
  return status;
}

#endif

int
ncx_putn_double_schar(void **xpp, size_t nelems, const schar *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_DOUBLE, tp++)
  {
    int lstatus = ncx_put_double_schar(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_putn_double_uchar(void **xpp, size_t nelems, const uchar *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_DOUBLE, tp++)
  {
    int lstatus = ncx_put_double_uchar(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_putn_double_short(void **xpp, size_t nelems, const short *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_DOUBLE, tp++)
  {
    int lstatus = ncx_put_double_short(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_putn_double_int(void **xpp, size_t nelems, const int *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_DOUBLE, tp++)
  {
    int lstatus = ncx_put_double_int(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_putn_double_long(void **xpp, size_t nelems, const long *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_DOUBLE, tp++)
  {
    int lstatus = ncx_put_double_long(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

int
ncx_putn_double_float(void **xpp, size_t nelems, const float *tp)
{
  char *xp = (char *) *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_DOUBLE, tp++)
  {
    int lstatus = ncx_put_double_float(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

#if X_SIZEOF_DOUBLE == SIZEOF_DOUBLE && !defined(NO_IEEE_FLOAT)
/* optimized version */
int
ncx_putn_double_double(void **xpp, size_t nelems, const double *tp)
{
#ifdef WORDS_BIGENDIAN
  (void) memcpy(*xpp, tp, nelems * X_SIZEOF_DOUBLE);
# else
  swapn8b(*xpp, tp, nelems);
# endif
  *xpp = (void *)((char *)(*xpp) + nelems * X_SIZEOF_DOUBLE);
  return ENOERR;
}
#elif vax
int
ncx_putn_double_double(void **xpp, size_t ndoubles, const double *ip)
{
  const double *const end = ip + ndoubles;

  while(ip < end)
  {
  const struct vax_double *const vdp = 
      (const struct vax_double *)ip;
  struct ieee_double *const idp =
       (struct ieee_double *) (*xpp);

  if ((vdp->mantissa4 > (dbl_limits[0].d.mantissa4 - 3)) &&
    (vdp->mantissa3 == dbl_limits[0].d.mantissa3) &&
    (vdp->mantissa2 == dbl_limits[0].d.mantissa2) &&
    (vdp->mantissa1 == dbl_limits[0].d.mantissa1) &&
    (vdp->exp == dbl_limits[0].d.exp))
  {
    *idp = dbl_limits[0].ieee;
    goto shipit;
  }
  if ((vdp->mantissa4 == dbl_limits[1].d.mantissa4) &&
    (vdp->mantissa3 == dbl_limits[1].d.mantissa3) &&
    (vdp->mantissa2 == dbl_limits[1].d.mantissa2) &&
    (vdp->mantissa1 == dbl_limits[1].d.mantissa1) &&
    (vdp->exp == dbl_limits[1].d.exp))
  {
    *idp = dbl_limits[1].ieee;
    goto shipit;
  }

  {
    unsigned exp = vdp->exp - VAX_DBL_BIAS + IEEE_DBL_BIAS;

    unsigned mant_lo = ((vdp->mantissa2 & MASK(3)) << 29) |
      (vdp->mantissa3 << 13) |
      ((vdp->mantissa4 >> 3) & MASK(13));

    unsigned mant_hi = (vdp->mantissa1 << 13)
         | (vdp->mantissa2 >> 3);

    if((vdp->mantissa4 & 7) > 4)
    {
      /* round up */
      mant_lo++;
      if(mant_lo == 0)
      {
        mant_hi++;
        if(mant_hi > 0xffffff)
        {
          mant_hi = 0;
          exp++;
        }
      }
    }

    idp->mant_lo = SWAP4(mant_lo);
    idp->mant_6 = mant_hi >> 16;
    idp->mant_5 = (mant_hi & 0xff00) >> 8;
    idp->mant_4 = mant_hi;
    idp->exp_hi = exp >> 4;
    idp->exp_lo = exp;
  }
    
  shipit:
    idp->sign = vdp->sign;

    ip++;
    *xpp = (char *)(*xpp) + X_SIZEOF_DOUBLE;
  }
  return ENOERR;
}
  /* vax */
#elif _SX && _FLOAT2
int
ncx_putn_double_double(void **xpp, size_t nelems, const double *tp)
{
  char *const xp = *xpp;

  const int ncnv = fl2_ie3(tp, xp, 8, 8, nelems);

  *xpp = xp + nelems * X_SIZEOF_DOUBLE;
  return (nelems == ncnv ? ENOERR : NC_ERANGE);
}
#else
int
ncx_putn_double_double(void **xpp, size_t nelems, const double *tp)
{
  char *xp = *xpp;
  int status = ENOERR;

  for( ; nelems != 0; nelems--, xp += X_SIZEOF_DOUBLE, tp++)
  {
    int lstatus = ncx_put_double_double(xp, tp);
    if(lstatus != ENOERR)
      status = lstatus;
  }

  *xpp = (void *)xp;
  return status;
}

#endif


/*
 * Other aggregate conversion functions.
 */

/* text */

int
ncx_getn_text(const void **xpp, size_t nelems, char *tp)
{
  (void) memcpy(tp, *xpp, nelems);
  *xpp = (void *)((char *)(*xpp) + nelems);
  return ENOERR;

}

int
ncx_pad_getn_text(const void **xpp, size_t nelems, char *tp)
{
  size_t rndup = nelems % X_ALIGN;

  if(rndup)
    rndup = X_ALIGN - rndup;

  (void) memcpy(tp, *xpp, nelems);
  *xpp = (void *)((char *)(*xpp) + nelems + rndup);

  return ENOERR;

}

int
ncx_putn_text(void **xpp, size_t nelems, const char *tp)
{
  (void) memcpy(*xpp, tp, nelems);
  *xpp = (void *)((char *)(*xpp) + nelems);

  return ENOERR;

}

int
ncx_pad_putn_text(void **xpp, size_t nelems, const char *tp)
{
  size_t rndup = nelems % X_ALIGN;

  if(rndup)
    rndup = X_ALIGN - rndup;

  (void) memcpy(*xpp, tp, nelems);
  *xpp = (void *)((char *)(*xpp) + nelems);

  if(rndup)
  {
    (void) memcpy(*xpp, nada, rndup);
    *xpp = (void *)((char *)(*xpp) + rndup);
  }
  
  return ENOERR;

}


/* opaque */

int
ncx_getn_void(const void **xpp, size_t nelems, void *tp)
{
  (void) memcpy(tp, *xpp, nelems);
  *xpp = (void *)((char *)(*xpp) + nelems);
  return ENOERR;

}

int
ncx_pad_getn_void(const void **xpp, size_t nelems, void *tp)
{
  size_t rndup = nelems % X_ALIGN;

  if(rndup)
    rndup = X_ALIGN - rndup;

  (void) memcpy(tp, *xpp, nelems);
  *xpp = (void *)((char *)(*xpp) + nelems + rndup);

  return ENOERR;

}

int
ncx_putn_void(void **xpp, size_t nelems, const void *tp)
{
  (void) memcpy(*xpp, tp, nelems);
  *xpp = (void *)((char *)(*xpp) + nelems);

  return ENOERR;

}

int
ncx_pad_putn_void(void **xpp, size_t nelems, const void *tp)
{
  size_t rndup = nelems % X_ALIGN;

  if(rndup)
    rndup = X_ALIGN - rndup;

  (void) memcpy(*xpp, tp, nelems);
  *xpp = (void *)((char *)(*xpp) + nelems);

  if(rndup)
  {
    (void) memcpy(*xpp, nada, rndup);
    *xpp = (void *)((char *)(*xpp) + rndup);
  }
  
  return ENOERR;

}
