1 /* $NetBSD: strtorxL.c,v 1.3 2008/03/21 23:13:48 christos Exp $ */ 2 3 /**************************************************************** 4 5 The author of this software is David M. Gay. 6 7 Copyright (C) 1998, 2000 by Lucent Technologies 8 All Rights Reserved 9 10 Permission to use, copy, modify, and distribute this software and 11 its documentation for any purpose and without fee is hereby 12 granted, provided that the above copyright notice appear in all 13 copies and that both that the copyright notice and this 14 permission notice and warranty disclaimer appear in supporting 15 documentation, and that the name of Lucent or any of its entities 16 not be used in advertising or publicity pertaining to 17 distribution of the software without specific, written prior 18 permission. 19 20 LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 21 INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. 22 IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY 23 SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 24 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER 25 IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, 26 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF 27 THIS 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 #endif 46 #ifdef IEEE_LITTLE_ENDIAN 47 #define _0 2 48 #define _1 1 49 #define _2 0 50 #endif 51 52 void 53 #ifdef KR_headers 54 ULtoxL(L, bits, exp, k) ULong *L; ULong *bits; Long exp; int k; 55 #else 56 ULtoxL(ULong *L, ULong *bits, Long exp, int k) 57 #endif 58 { 59 switch(k & STRTOG_Retmask) { 60 case STRTOG_NoNumber: 61 case STRTOG_Zero: 62 L[0] = L[1] = L[2] = 0; 63 break; 64 65 case STRTOG_Normal: 66 case STRTOG_Denormal: 67 case STRTOG_NaNbits: 68 L[_0] = (exp + 0x3fff + 63) << 16; 69 L[_1] = bits[1]; 70 L[_2] = bits[0]; 71 break; 72 73 case STRTOG_Infinite: 74 L[_0] = 0x7fff << 16; 75 L[_1] = L[_2] = 0; 76 break; 77 78 case STRTOG_NaN: 79 L[0] = ld_QNAN0; 80 L[1] = ld_QNAN1; 81 L[2] = ld_QNAN2; 82 } 83 if (k & STRTOG_Neg) 84 L[_0] |= 0x80000000L; 85 } 86 87 int 88 #ifdef KR_headers 89 strtorxL(s, sp, rounding, L) CONST char *s; char **sp; int rounding; void *L; 90 #else 91 strtorxL(CONST char *s, char **sp, int rounding, void *L) 92 #endif 93 { 94 static FPI fpi0 = { 64, 1-16383-64+1, 32766 - 16383 - 64 + 1, 1, SI }; 95 FPI *fpi, fpi1; 96 ULong bits[2]; 97 Long exp; 98 int k; 99 100 fpi = &fpi0; 101 if (rounding != FPI_Round_near) { 102 fpi1 = fpi0; 103 fpi1.rounding = rounding; 104 fpi = &fpi1; 105 } 106 k = strtodg(s, sp, fpi, &exp, bits); 107 if (k == STRTOG_NoMemory) 108 return k; 109 ULtoxL((ULong*)L, bits, exp, k); 110 return k; 111 } 112