1/* $NetBSD: strtorQ.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#endif 47#ifdef IEEE_LITTLE_ENDIAN 48#define _0 3 49#define _1 2 50#define _2 1 51#define _3 0 52#endif 53 54 void 55#ifdef KR_headers 56ULtoQ(L, bits, expt, k) ULong *L; ULong *bits; Long expt; int k; 57#else 58ULtoQ(ULong *L, ULong *bits, Long expt, int k) 59#endif 60{ 61 switch(k & STRTOG_Retmask) { 62 case STRTOG_NoNumber: 63 case STRTOG_Zero: 64 L[0] = L[1] = L[2] = L[3] = 0; 65 break; 66 67 case STRTOG_Normal: 68 case STRTOG_NaNbits: 69 L[_3] = bits[0]; 70 L[_2] = bits[1]; 71 L[_1] = bits[2]; 72 L[_0] = (bits[3] & ~0x10000) | ((expt + 0x3fff + 112) << 16); 73 break; 74 75 case STRTOG_Denormal: 76 L[_3] = bits[0]; 77 L[_2] = bits[1]; 78 L[_1] = bits[2]; 79 L[_0] = bits[3]; 80 break; 81 82 case STRTOG_Infinite: 83 L[_0] = 0x7fff0000; 84 L[_1] = L[_2] = L[_3] = 0; 85 break; 86 87 case STRTOG_NaN: 88 L[0] = ld_QNAN0; 89 L[1] = ld_QNAN1; 90 L[2] = ld_QNAN2; 91 L[3] = ld_QNAN3; 92 } 93 if (k & STRTOG_Neg) 94 L[_0] |= 0x80000000L; 95 } 96 97 int 98#ifdef KR_headers 99strtorQ(s, sp, rounding, L) CONST char *s; char **sp; int rounding; void *L; 100#else 101strtorQ(CONST char *s, char **sp, int rounding, void *L) 102#endif 103{ 104 static FPI fpi0 = { 113, 1-16383-113+1, 32766-16383-113+1, 1, SI }; 105 FPI *fpi, fpi1; 106 ULong bits[4]; 107 Long expt; 108 int k; 109 110 fpi = &fpi0; 111 if (rounding != FPI_Round_near) { 112 fpi1 = fpi0; 113 fpi1.rounding = rounding; 114 fpi = &fpi1; 115 } 116 k = strtodg(s, sp, fpi, &expt, bits); 117 if (k == STRTOG_NoMemory) 118 return k; 119 ULtoQ((ULong*)L, bits, expt, k); 120 return k; 121 } 122