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 30 David M. Gay 31 Bell Laboratories, Room 2C-463 32 600 Mountain Avenue 33 Murray Hill, NJ 07974-0636 34 U.S.A. 35 dmg@bell-labs.com 36 */ 37 38 #include "gdtoaimp.h" 39 40 #undef _0 41 #undef _1 42 43 /* one or the other of IEEE_MC68k or IEEE_8087 should be #defined */ 44 45 #ifdef IEEE_MC68k 46 #define _0 0 47 #define _1 1 48 #define _2 2 49 #define _3 3 50 #endif 51 #ifdef IEEE_8087 52 #define _0 3 53 #define _1 2 54 #define _2 1 55 #define _3 0 56 #endif 57 58 char* 59 #ifdef KR_headers 60 g_Qfmt(buf, V, ndig, bufsize) char *buf; char *V; int ndig; unsigned bufsize; 61 #else 62 g_Qfmt(char *buf, void *V, int ndig, unsigned bufsize) 63 #endif 64 { 65 static FPI fpi = { 113, 1-16383-113+1, 32766 - 16383 - 113 + 1, 1, 0 }; 66 char *b, *s, *se; 67 ULong bits[4], *L, sign; 68 int decpt, ex, i, mode; 69 70 if (ndig < 0) 71 ndig = 0; 72 if (bufsize < ndig + 10) 73 return 0; 74 75 L = (ULong*)V; 76 sign = L[_0] & 0x80000000L; 77 bits[3] = L[_0] & 0xffff; 78 bits[2] = L[_1]; 79 bits[1] = L[_2]; 80 bits[0] = L[_3]; 81 b = buf; 82 if ( (ex = (L[_0] & 0x7fff0000L) >> 16) !=0) { 83 if (ex == 0x7fff) { 84 /* Infinity or NaN */ 85 if (bits[0] | bits[1] | bits[2] | bits[3]) 86 b = strcpy(b, "NaN"); 87 else { 88 b = buf; 89 if (sign) 90 *b++ = '-'; 91 b = strcp(b, "Infinity"); 92 } 93 return b; 94 } 95 i = STRTOG_Normal; 96 bits[3] |= 0x10000; 97 } 98 else if (bits[0] | bits[1] | bits[2] | bits[3]) { 99 i = STRTOG_Denormal; 100 ex = 1; 101 } 102 else { 103 #ifndef IGNORE_ZERO_SIGN 104 if (sign) 105 *b++ = '-'; 106 #endif 107 *b++ = '0'; 108 *b = 0; 109 return b; 110 } 111 ex -= 0x3fff + 112; 112 mode = 2; 113 if (ndig <= 0) { 114 if (bufsize < 48) 115 return 0; 116 mode = 0; 117 } 118 s = gdtoa(&fpi, ex, bits, &i, mode, ndig, &decpt, &se); 119 return g__fmt(buf, s, se, decpt, sign); 120 } 121