/* * xdr_float.c, Generic XDR routines implementation. * * Copyright (c) 2010, Oracle America, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * Neither the name of the "Oracle America, Inc." nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * These are the "floating point" xdr routines used to (de)serialize * most common data items. See xdr.h for more info on the interface to * xdr. */ #include <stdio.h> #include <endian.h> #include <rpc/types.h> #include <rpc/xdr.h> /* * NB: Not portable. * This routine works on Suns (Sky / 68000's) and Vaxen. */ #define LSW (__FLOAT_WORD_ORDER == __BIG_ENDIAN) #ifdef vax /* What IEEE single precision floating point looks like on a Vax */ struct ieee_single { unsigned int mantissa: 23; unsigned int exp : 8; unsigned int sign : 1; }; /* 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; } sgl_limits[2] = { {{ 0x7f, 0xff, 0x0, 0xffff }, /* Max Vax */ { 0x0, 0xff, 0x0 }}, /* Max IEEE */ {{ 0x0, 0x0, 0x0, 0x0 }, /* Min Vax */ { 0x0, 0x0, 0x0 }} /* Min IEEE */ }; #endif /* vax */ bool_t xdr_float(xdrs, fp) XDR *xdrs; float *fp; { #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); } libc_hidden_nolink_sunrpc (xdr_float, GLIBC_2_0) /* * This routine works on Suns (Sky / 68000's) and Vaxen. */ #ifdef vax /* What IEEE double precision floating point looks like on a Vax */ struct ieee_double { unsigned int mantissa1 : 20; unsigned int exp : 11; unsigned int sign : 1; unsigned int mantissa2 : 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 struct dbl_limits { struct vax_double d; struct ieee_double ieee; } dbl_limits[2] = { {{ 0x7f, 0xff, 0x0, 0xffff, 0xffff, 0xffff }, /* Max Vax */ { 0x0, 0x7ff, 0x0, 0x0 }}, /* Max IEEE */ {{ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, /* Min Vax */ { 0x0, 0x0, 0x0, 0x0 }} /* Min IEEE */ }; #endif /* vax */ bool_t xdr_double(xdrs, dp) XDR *xdrs; double *dp; { #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); } libc_hidden_nolink_sunrpc (xdr_double, GLIBC_2_0)