1 /* $NetBSD: strtorx.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 #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 58 ULtox(L, bits, exp, k) UShort *L; ULong *bits; Long exp; int k; 59 #else 60 ULtox(UShort *L, ULong *bits, Long exp, 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] = exp + 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] = L[_2] = L[_3] = L[_4] = 0; 86 break; 87 88 case STRTOG_NaN: 89 L[0] = ldus_QNAN0; 90 L[1] = ldus_QNAN1; 91 L[2] = ldus_QNAN2; 92 L[3] = ldus_QNAN3; 93 L[4] = ldus_QNAN4; 94 } 95 if (k & STRTOG_Neg) 96 L[_0] |= 0x8000; 97 } 98 99 int 100 #ifdef KR_headers 101 strtorx(s, sp, rounding, L) CONST char *s; char **sp; int rounding; void *L; 102 #else 103 strtorx(CONST char *s, char **sp, int rounding, void *L) 104 #endif 105 { 106 static FPI fpi0 = { 64, 1-16383-64+1, 32766 - 16383 - 64 + 1, 1, SI }; 107 FPI *fpi, fpi1; 108 ULong bits[2]; 109 Long exp; 110 int k; 111 112 fpi = &fpi0; 113 if (rounding != FPI_Round_near) { 114 fpi1 = fpi0; 115 fpi1.rounding = rounding; 116 fpi = &fpi1; 117 } 118 k = strtodg(s, sp, fpi, &exp, bits); 119 if (k == STRTOG_NoMemory) 120 return k; 121 ULtox((UShort*)L, bits, exp, k); 122 return k; 123 } 124