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glibc  2.9
Defines | Functions
xdr_float.c File Reference
#include <stdio.h>
#include <endian.h>
#include <rpc/types.h>
#include <rpc/xdr.h>

Go to the source code of this file.

Defines

#define LSW   (__FLOAT_WORD_ORDER == __BIG_ENDIAN)

Functions

bool_t xdr_float (XDR *xdrs, float *fp)
bool_t xdr_double (XDR *xdrs, double *dp)

Define Documentation

#define LSW   (__FLOAT_WORD_ORDER == __BIG_ENDIAN)

Definition at line 55 of file xdr_float.c.


Function Documentation

bool_t xdr_double ( XDR xdrs,
double *  dp 
)

Definition at line 209 of file xdr_float.c.

{
#ifdef vax
       struct ieee_double id;
       struct vax_double vd;
       register struct dbl_limits *lim;
       int i;
#endif

       switch (xdrs->x_op) {

       case XDR_ENCODE:
#ifdef vax
              vd = *((struct vax_double *)dp);
              for (i = 0, lim = dbl_limits;
                     i < sizeof(dbl_limits)/sizeof(struct dbl_limits);
                     i++, lim++) {
                     if ((vd.mantissa4 == lim->d.mantissa4) &&
                            (vd.mantissa3 == lim->d.mantissa3) &&
                            (vd.mantissa2 == lim->d.mantissa2) &&
                            (vd.mantissa1 == lim->d.mantissa1) &&
                            (vd.exp == lim->d.exp)) {
                            id = lim->ieee;
                            goto shipit;
                     }
              }
              id.exp = vd.exp - VAX_DBL_BIAS + IEEE_DBL_BIAS;
              id.mantissa1 = (vd.mantissa1 << 13) | (vd.mantissa2 >> 3);
              id.mantissa2 = ((vd.mantissa2 & MASK(3)) << 29) |
                            (vd.mantissa3 << 13) |
                            ((vd.mantissa4 >> 3) & MASK(13));
       shipit:
              id.sign = vd.sign;
              dp = (double *)&id;
#endif
              if (2*sizeof(long) == sizeof(double)) {
                     long *lp = (long *)dp;
                     return (XDR_PUTLONG(xdrs, lp+!LSW) &&
                            XDR_PUTLONG(xdrs, lp+LSW));
              } else if (2*sizeof(int) == sizeof(double)) {
                     int *ip = (int *)dp;
                     long tmp[2];
                     tmp[0] = ip[!LSW];
                     tmp[1] = ip[LSW];
                     return (XDR_PUTLONG(xdrs, tmp) &&
                            XDR_PUTLONG(xdrs, tmp+1));
              }
              break;

       case XDR_DECODE:
#ifdef vax
              lp = (long *)&id;
              if (!XDR_GETLONG(xdrs, lp++) || !XDR_GETLONG(xdrs, lp))
                     return (FALSE);
              for (i = 0, lim = dbl_limits;
                     i < sizeof(dbl_limits)/sizeof(struct dbl_limits);
                     i++, lim++) {
                     if ((id.mantissa2 == lim->ieee.mantissa2) &&
                            (id.mantissa1 == lim->ieee.mantissa1) &&
                            (id.exp == lim->ieee.exp)) {
                            vd = lim->d;
                            goto doneit;
                     }
              }
              vd.exp = id.exp - IEEE_DBL_BIAS + VAX_DBL_BIAS;
              vd.mantissa1 = (id.mantissa1 >> 13);
              vd.mantissa2 = ((id.mantissa1 & MASK(13)) << 3) |
                            (id.mantissa2 >> 29);
              vd.mantissa3 = (id.mantissa2 >> 13);
              vd.mantissa4 = (id.mantissa2 << 3);
       doneit:
              vd.sign = id.sign;
              *dp = *((double *)&vd);
              return (TRUE);
#else
              if (2*sizeof(long) == sizeof(double)) {
                     long *lp = (long *)dp;
                     return (XDR_GETLONG(xdrs, lp+!LSW) &&
                            XDR_GETLONG(xdrs, lp+LSW));
              } else if (2*sizeof(int) == sizeof(double)) {
                     int *ip = (int *)dp;
                     long tmp[2];
                     if (XDR_GETLONG(xdrs, tmp+!LSW) &&
                         XDR_GETLONG(xdrs, tmp+LSW)) {
                            ip[0] = tmp[0];
                            ip[1] = tmp[1];
                            return (TRUE);
                     }
              }
              break;
#endif

       case XDR_FREE:
              return (TRUE);
       }
       return (FALSE);
}
bool_t xdr_float ( XDR xdrs,
float *  fp 
)

Definition at line 89 of file xdr_float.c.

{
#ifdef vax
       struct ieee_single is;
       struct vax_single vs, *vsp;
       struct sgl_limits *lim;
       int i;
#endif
       switch (xdrs->x_op) {

       case XDR_ENCODE:
#ifdef vax
              vs = *((struct vax_single *)fp);
              for (i = 0, lim = sgl_limits;
                     i < sizeof(sgl_limits)/sizeof(struct sgl_limits);
                     i++, lim++) {
                     if ((vs.mantissa2 == lim->s.mantissa2) &&
                            (vs.exp == lim->s.exp) &&
                            (vs.mantissa1 == lim->s.mantissa1)) {
                            is = lim->ieee;
                            goto shipit;
                     }
              }
              is.exp = vs.exp - VAX_SNG_BIAS + IEEE_SNG_BIAS;
              is.mantissa = (vs.mantissa1 << 16) | vs.mantissa2;
       shipit:
              is.sign = vs.sign;
              return (XDR_PUTLONG(xdrs, (long *)&is));
#else
              if (sizeof(float) == sizeof(long))
                     return (XDR_PUTLONG(xdrs, (long *)fp));
              else if (sizeof(float) == sizeof(int)) {
                     long tmp = *(int *)fp;
                     return (XDR_PUTLONG(xdrs, &tmp));
              }
              break;
#endif

       case XDR_DECODE:
#ifdef vax
              vsp = (struct vax_single *)fp;
              if (!XDR_GETLONG(xdrs, (long *)&is))
                     return (FALSE);
              for (i = 0, lim = sgl_limits;
                     i < sizeof(sgl_limits)/sizeof(struct sgl_limits);
                     i++, lim++) {
                     if ((is.exp == lim->ieee.exp) &&
                            (is.mantissa == lim->ieee.mantissa)) {
                            *vsp = lim->s;
                            goto doneit;
                     }
              }
              vsp->exp = is.exp - IEEE_SNG_BIAS + VAX_SNG_BIAS;
              vsp->mantissa2 = is.mantissa;
              vsp->mantissa1 = (is.mantissa >> 16);
       doneit:
              vsp->sign = is.sign;
              return (TRUE);
#else
              if (sizeof(float) == sizeof(long))
                     return (XDR_GETLONG(xdrs, (long *)fp));
              else if (sizeof(float) == sizeof(int)) {
                     long tmp;
                     if (XDR_GETLONG(xdrs, &tmp)) {
                            *(int *)fp = tmp;
                            return (TRUE);
                     }
              }
              break;
#endif

       case XDR_FREE:
              return (TRUE);
       }
       return (FALSE);
}