1/* $NetBSD: strtorx.c,v 1.3 2008/03/21 23:13:48 christos Exp $ */ 2 3/**************************************************************** 4 5The author of this software is David M. Gay. 6 7Copyright (C) 1998, 2000 by Lucent Technologies 8All Rights Reserved 9 10Permission to use, copy, modify, and distribute this software and 11its documentation for any purpose and without fee is hereby 12granted, provided that the above copyright notice appear in all 13copies and that both that the copyright notice and this 14permission notice and warranty disclaimer appear in supporting 15documentation, and that the name of Lucent or any of its entities 16not be used in advertising or publicity pertaining to 17distribution of the software without specific, written prior 18permission. 19 20LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 21INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. 22IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY 23SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 24WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER 25IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, 26ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF 27THIS SOFTWARE. 28 29****************************************************************/ 30 31/* Please send bug reports to David M. Gay (dmg at acm dot org, 32 * with " at " changed at "@" and " dot " changed to "."). */ 33 34#include "gdtoaimp.h" 35 36#undef _0 37#undef _1 38 39/* one or the other of IEEE_BIG_ENDIAN or IEEE_LITTLE_ENDIAN should be #defined */ 40 41#ifdef IEEE_BIG_ENDIAN 42#define _0 0 43#define _1 1 44#define _2 2 45#define _3 3 46#define _4 4 47#endif 48#ifdef IEEE_LITTLE_ENDIAN 49#define _0 4 50#define _1 3 51#define _2 2 52#define _3 1 53#define _4 0 54#endif 55 56 void 57#ifdef KR_headers 58ULtox(L, bits, expt, k) UShort *L; ULong *bits; Long expt; int k; 59#else 60ULtox(UShort *L, ULong *bits, Long expt, int k) 61#endif 62{ 63 switch(k & STRTOG_Retmask) { 64 case STRTOG_NoNumber: 65 case STRTOG_Zero: 66 L[0] = L[1] = L[2] = L[3] = L[4] = 0; 67 break; 68 69 case STRTOG_Denormal: 70 L[_0] = 0; 71 goto normal_bits; 72 73 case STRTOG_Normal: 74 case STRTOG_NaNbits: 75 L[_0] = expt + 0x3fff + 63; 76 normal_bits: 77 L[_4] = (UShort)bits[0]; 78 L[_3] = (UShort)(bits[0] >> 16); 79 L[_2] = (UShort)bits[1]; 80 L[_1] = (UShort)(bits[1] >> 16); 81 break; 82 83 case STRTOG_Infinite: 84 L[_0] = 0x7fff; 85 L[_1] = 0x8000; 86 L[_2] = L[_3] = L[_4] = 0; 87 break; 88 89 case STRTOG_NaN: 90 L[0] = ldus_QNAN0; 91 L[1] = ldus_QNAN1; 92 L[2] = ldus_QNAN2; 93 L[3] = ldus_QNAN3; 94 L[4] = ldus_QNAN4; 95 } 96 if (k & STRTOG_Neg) 97 L[_0] |= 0x8000; 98 } 99 100 int 101#ifdef KR_headers 102strtorx(s, sp, rounding, L) CONST char *s; char **sp; int rounding; void *L; 103#else 104strtorx(CONST char *s, char **sp, int rounding, void *L) 105#endif 106{ 107 static CONST FPI fpi0 = { 64, 1-16383-64+1, 32766 - 16383 - 64 + 1, 1, SI }; 108 CONST FPI *fpi; 109 FPI fpi1; 110 ULong bits[2]; 111 Long expt; 112 int k; 113 114 fpi = &fpi0; 115 if (rounding != FPI_Round_near) { 116 fpi1 = fpi0; 117 fpi1.rounding = rounding; 118 fpi = &fpi1; 119 } 120 k = strtodg(s, sp, fpi, &expt, bits); 121 if (k == STRTOG_NoMemory) 122 return k; 123 ULtox((UShort*)L, bits, expt, k); 124 return k; 125 } 126