1 2 /* 3 * Copyright (c) 2009, Sun Microsystems, Inc. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * - Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * - Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * - Neither the name of Sun Microsystems, Inc. nor the names of its 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 21 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 //#include <sys/cdefs.h> 31 32 /* 33 * xdr_float.c, Generic XDR routines implementation. 34 * 35 * Copyright (C) 1984, Sun Microsystems, Inc. 36 * 37 * These are the "floating point" xdr routines used to (de)serialize 38 * most common data items. See xdr.h for more info on the interface to 39 * xdr. 40 */ 41 42 #include <wintirpc.h> 43 #include "namespace.h" 44 #include <sys/types.h> 45 //#include <sys/param.h> 46 47 #include <stdio.h> 48 49 #include <rpc/types.h> 50 #include <rpc/xdr.h> 51 #include "un-namespace.h" 52 53 /* 54 * NB: Not portable. 55 * This routine works on machines with IEEE754 FP and Vaxen. 56 */ 57 58 #if defined(__vax__) 59 60 /* What IEEE single precision floating point looks like on a Vax */ 61 struct ieee_single { 62 unsigned int mantissa: 23; 63 unsigned int exp : 8; 64 unsigned int sign : 1; 65 }; 66 67 /* Vax single precision floating point */ 68 struct vax_single { 69 unsigned int mantissa1 : 7; 70 unsigned int exp : 8; 71 unsigned int sign : 1; 72 unsigned int mantissa2 : 16; 73 }; 74 75 #define VAX_SNG_BIAS 0x81 76 #define IEEE_SNG_BIAS 0x7f 77 78 static struct sgl_limits { 79 struct vax_single s; 80 struct ieee_single ieee; 81 } sgl_limits[2] = { 82 {{ 0x7f, 0xff, 0x0, 0xffff }, /* Max Vax */ 83 { 0x0, 0xff, 0x0 }}, /* Max IEEE */ 84 {{ 0x0, 0x0, 0x0, 0x0 }, /* Min Vax */ 85 { 0x0, 0x0, 0x0 }} /* Min IEEE */ 86 }; 87 #else 88 89 //#include <bits/endian.h> 90 #define IEEEFP 91 92 #endif /* vax */ 93 94 bool_t 95 xdr_float(xdrs, fp) 96 XDR *xdrs; 97 float *fp; 98 { 99 #ifndef IEEEFP 100 struct ieee_single is; 101 struct vax_single vs, *vsp; 102 struct sgl_limits *lim; 103 int i; 104 #endif 105 switch (xdrs->x_op) { 106 107 case XDR_ENCODE: 108 #ifdef IEEEFP 109 return (XDR_PUTINT32(xdrs, (int32_t *)fp)); 110 #else 111 vs = *((struct vax_single *)fp); 112 for (i = 0, lim = sgl_limits; 113 i < sizeof(sgl_limits)/sizeof(struct sgl_limits); 114 i++, lim++) { 115 if ((vs.mantissa2 == lim->s.mantissa2) && 116 (vs.exp == lim->s.exp) && 117 (vs.mantissa1 == lim->s.mantissa1)) { 118 is = lim->ieee; 119 goto shipit; 120 } 121 } 122 is.exp = vs.exp - VAX_SNG_BIAS + IEEE_SNG_BIAS; 123 is.mantissa = (vs.mantissa1 << 16) | vs.mantissa2; 124 shipit: 125 is.sign = vs.sign; 126 return (XDR_PUTINT32(xdrs, (int32_t *)&is)); 127 #endif 128 129 case XDR_DECODE: 130 #ifdef IEEEFP 131 return (XDR_GETINT32(xdrs, (int32_t *)fp)); 132 #else 133 vsp = (struct vax_single *)fp; 134 if (!XDR_GETINT32(xdrs, (int32_t *)&is)) 135 return (FALSE); 136 for (i = 0, lim = sgl_limits; 137 i < sizeof(sgl_limits)/sizeof(struct sgl_limits); 138 i++, lim++) { 139 if ((is.exp == lim->ieee.exp) && 140 (is.mantissa == lim->ieee.mantissa)) { 141 *vsp = lim->s; 142 goto doneit; 143 } 144 } 145 vsp->exp = is.exp - IEEE_SNG_BIAS + VAX_SNG_BIAS; 146 vsp->mantissa2 = is.mantissa; 147 vsp->mantissa1 = (is.mantissa >> 16); 148 doneit: 149 vsp->sign = is.sign; 150 return (TRUE); 151 #endif 152 153 case XDR_FREE: 154 return (TRUE); 155 } 156 /* NOTREACHED */ 157 return (FALSE); 158 } 159 160 #if defined(__vax__) 161 /* What IEEE double precision floating point looks like on a Vax */ 162 struct ieee_double { 163 unsigned int mantissa1 : 20; 164 unsigned int exp : 11; 165 unsigned int sign : 1; 166 unsigned int mantissa2 : 32; 167 }; 168 169 /* Vax double precision floating point */ 170 struct vax_double { 171 unsigned int mantissa1 : 7; 172 unsigned int exp : 8; 173 unsigned int sign : 1; 174 unsigned int mantissa2 : 16; 175 unsigned int mantissa3 : 16; 176 unsigned int mantissa4 : 16; 177 }; 178 179 #define VAX_DBL_BIAS 0x81 180 #define IEEE_DBL_BIAS 0x3ff 181 #define MASK(nbits) ((1 << nbits) - 1) 182 183 static struct dbl_limits { 184 struct vax_double d; 185 struct ieee_double ieee; 186 } dbl_limits[2] = { 187 {{ 0x7f, 0xff, 0x0, 0xffff, 0xffff, 0xffff }, /* Max Vax */ 188 { 0x0, 0x7ff, 0x0, 0x0 }}, /* Max IEEE */ 189 {{ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, /* Min Vax */ 190 { 0x0, 0x0, 0x0, 0x0 }} /* Min IEEE */ 191 }; 192 193 #endif /* vax */ 194 195 196 bool_t 197 xdr_double(xdrs, dp) 198 XDR *xdrs; 199 double *dp; 200 { 201 #ifdef IEEEFP 202 int32_t *i32p; 203 bool_t rv; 204 #else 205 int32_t *lp; 206 struct ieee_double id; 207 struct vax_double vd; 208 struct dbl_limits *lim; 209 int i; 210 #endif 211 212 switch (xdrs->x_op) { 213 214 case XDR_ENCODE: 215 #ifdef IEEEFP 216 i32p = (int32_t *)(void *)dp; 217 #if BYTE_ORDER == BIG_ENDIAN 218 rv = XDR_PUTINT32(xdrs, i32p); 219 if (!rv) 220 return (rv); 221 rv = XDR_PUTINT32(xdrs, i32p+1); 222 #else 223 rv = XDR_PUTINT32(xdrs, i32p+1); 224 if (!rv) 225 return (rv); 226 rv = XDR_PUTINT32(xdrs, i32p); 227 #endif 228 return (rv); 229 #else 230 vd = *((struct vax_double *)dp); 231 for (i = 0, lim = dbl_limits; 232 i < sizeof(dbl_limits)/sizeof(struct dbl_limits); 233 i++, lim++) { 234 if ((vd.mantissa4 == lim->d.mantissa4) && 235 (vd.mantissa3 == lim->d.mantissa3) && 236 (vd.mantissa2 == lim->d.mantissa2) && 237 (vd.mantissa1 == lim->d.mantissa1) && 238 (vd.exp == lim->d.exp)) { 239 id = lim->ieee; 240 goto shipit; 241 } 242 } 243 id.exp = vd.exp - VAX_DBL_BIAS + IEEE_DBL_BIAS; 244 id.mantissa1 = (vd.mantissa1 << 13) | (vd.mantissa2 >> 3); 245 id.mantissa2 = ((vd.mantissa2 & MASK(3)) << 29) | 246 (vd.mantissa3 << 13) | 247 ((vd.mantissa4 >> 3) & MASK(13)); 248 shipit: 249 id.sign = vd.sign; 250 lp = (int32_t *)&id; 251 return (XDR_PUTINT32(xdrs, lp++) && XDR_PUTINT32(xdrs, lp)); 252 #endif 253 254 case XDR_DECODE: 255 #ifdef IEEEFP 256 i32p = (int32_t *)(void *)dp; 257 #if BYTE_ORDER == BIG_ENDIAN 258 rv = XDR_GETINT32(xdrs, i32p); 259 if (!rv) 260 return (rv); 261 rv = XDR_GETINT32(xdrs, i32p+1); 262 #else 263 rv = XDR_GETINT32(xdrs, i32p+1); 264 if (!rv) 265 return (rv); 266 rv = XDR_GETINT32(xdrs, i32p); 267 #endif 268 return (rv); 269 #else 270 lp = (int32_t *)&id; 271 if (!XDR_GETINT32(xdrs, lp++) || !XDR_GETINT32(xdrs, lp)) 272 return (FALSE); 273 for (i = 0, lim = dbl_limits; 274 i < sizeof(dbl_limits)/sizeof(struct dbl_limits); 275 i++, lim++) { 276 if ((id.mantissa2 == lim->ieee.mantissa2) && 277 (id.mantissa1 == lim->ieee.mantissa1) && 278 (id.exp == lim->ieee.exp)) { 279 vd = lim->d; 280 goto doneit; 281 } 282 } 283 vd.exp = id.exp - IEEE_DBL_BIAS + VAX_DBL_BIAS; 284 vd.mantissa1 = (id.mantissa1 >> 13); 285 vd.mantissa2 = ((id.mantissa1 & MASK(13)) << 3) | 286 (id.mantissa2 >> 29); 287 vd.mantissa3 = (id.mantissa2 >> 13); 288 vd.mantissa4 = (id.mantissa2 << 3); 289 doneit: 290 vd.sign = id.sign; 291 *dp = *((double *)&vd); 292 return (TRUE); 293 #endif 294 295 case XDR_FREE: 296 return (TRUE); 297 } 298 /* NOTREACHED */ 299 return (FALSE); 300 } 301