1 /**************************************************************** 2 3 The author of this software is David M. Gay. 4 5 Copyright (C) 1998, 2000 by Lucent Technologies 6 All Rights Reserved 7 8 Permission to use, copy, modify, and distribute this software and 9 its documentation for any purpose and without fee is hereby 10 granted, provided that the above copyright notice appear in all 11 copies and that both that the copyright notice and this 12 permission notice and warranty disclaimer appear in supporting 13 documentation, and that the name of Lucent or any of its entities 14 not be used in advertising or publicity pertaining to 15 distribution of the software without specific, written prior 16 permission. 17 18 LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 19 INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. 20 IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY 21 SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 22 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER 23 IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, 24 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF 25 THIS SOFTWARE. 26 27 ****************************************************************/ 28 29 /* Please send bug reports to David M. Gay (dmg at acm dot org, 30 * with " at " changed at "@" and " dot " changed to "."). */ 31 32 #include "gdtoaimp.h" 33 34 #undef _0 35 #undef _1 36 37 /* one or the other of IEEE_MC68k or IEEE_8087 should be #defined */ 38 39 #ifdef IEEE_MC68k 40 #define _0 0 41 #define _1 1 42 #define _2 2 43 #define _3 3 44 #endif 45 #ifdef IEEE_8087 46 #define _0 3 47 #define _1 2 48 #define _2 1 49 #define _3 0 50 #endif 51 52 void 53 #ifdef KR_headers 54 ULtoQ(L, bits, exp, k) ULong *L; ULong *bits; Long exp; int k; 55 #else 56 ULtoQ(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] = L[3] = 0; 63 break; 64 65 case STRTOG_Normal: 66 case STRTOG_NaNbits: 67 L[_3] = bits[0]; 68 L[_2] = bits[1]; 69 L[_1] = bits[2]; 70 L[_0] = (bits[3] & ~0x10000) | ((exp + 0x3fff + 112) << 16); 71 break; 72 73 case STRTOG_Denormal: 74 L[_3] = bits[0]; 75 L[_2] = bits[1]; 76 L[_1] = bits[2]; 77 L[_0] = bits[3]; 78 break; 79 80 case STRTOG_NoMemory: 81 errno = ERANGE; 82 /* FALLTHROUGH */ 83 case STRTOG_Infinite: 84 L[_0] = 0x7fff0000; 85 L[_1] = L[_2] = L[_3] = 0; 86 break; 87 88 case STRTOG_NaN: 89 L[0] = ld_QNAN0; 90 L[1] = ld_QNAN1; 91 L[2] = ld_QNAN2; 92 L[3] = ld_QNAN3; 93 } 94 if (k & STRTOG_Neg) 95 L[_0] |= 0x80000000L; 96 } 97 98 int 99 #ifdef KR_headers 100 strtorQ(s, sp, rounding, L) CONST char *s; char **sp; int rounding; void *L; 101 #else 102 strtorQ(CONST char *s, char **sp, int rounding, void *L) 103 #endif 104 { 105 static FPI fpi0 = { 113, 1-16383-113+1, 32766-16383-113+1, 1, SI }; 106 FPI *fpi, fpi1; 107 ULong bits[4]; 108 Long exp; 109 int k; 110 111 fpi = &fpi0; 112 if (rounding != FPI_Round_near) { 113 fpi1 = fpi0; 114 fpi1.rounding = rounding; 115 fpi = &fpi1; 116 } 117 k = strtodg(s, sp, fpi, &exp, bits); 118 ULtoQ((ULong*)L, bits, exp, k); 119 return k; 120 } 121
