1112158Sdas/**************************************************************** 2112158Sdas 3112158SdasThe author of this software is David M. Gay. 4112158Sdas 5112158SdasCopyright (C) 1998 by Lucent Technologies 6112158SdasAll Rights Reserved 7112158Sdas 8112158SdasPermission to use, copy, modify, and distribute this software and 9112158Sdasits documentation for any purpose and without fee is hereby 10112158Sdasgranted, provided that the above copyright notice appear in all 11112158Sdascopies and that both that the copyright notice and this 12112158Sdaspermission notice and warranty disclaimer appear in supporting 13112158Sdasdocumentation, and that the name of Lucent or any of its entities 14112158Sdasnot be used in advertising or publicity pertaining to 15112158Sdasdistribution of the software without specific, written prior 16112158Sdaspermission. 17112158Sdas 18112158SdasLUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 19112158SdasINCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. 20112158SdasIN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY 21112158SdasSPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 22112158SdasWHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER 23112158SdasIN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, 24112158SdasARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF 25112158SdasTHIS SOFTWARE. 26112158Sdas 27112158Sdas****************************************************************/ 28112158Sdas 29165743Sdas/* Please send bug reports to David M. Gay (dmg at acm dot org, 30165743Sdas * with " at " changed at "@" and " dot " changed to "."). */ 31112158Sdas 32112158Sdas#include "gdtoaimp.h" 33112158Sdas 34112158Sdas#undef _0 35112158Sdas#undef _1 36112158Sdas 37112158Sdas/* one or the other of IEEE_MC68k or IEEE_8087 should be #defined */ 38112158Sdas 39112158Sdas#ifdef IEEE_MC68k 40112158Sdas#define _0 0 41112158Sdas#define _1 1 42112158Sdas#define _2 2 43112158Sdas#endif 44112158Sdas#ifdef IEEE_8087 45112158Sdas#define _0 2 46112158Sdas#define _1 1 47112158Sdas#define _2 0 48112158Sdas#endif 49112158Sdas 50112158Sdas char* 51112158Sdas#ifdef KR_headers 52187808Sdasg_xLfmt(buf, V, ndig, bufsize) char *buf; char *V; int ndig; size_t bufsize; 53112158Sdas#else 54187808Sdasg_xLfmt(char *buf, void *V, int ndig, size_t bufsize) 55112158Sdas#endif 56112158Sdas{ 57187808Sdas static FPI fpi0 = { 64, 1-16383-64+1, 32766 - 16383 - 64 + 1, 1, 0 }; 58112158Sdas char *b, *s, *se; 59112158Sdas ULong bits[2], *L, sign; 60112158Sdas int decpt, ex, i, mode; 61187808Sdas#ifdef Honor_FLT_ROUNDS 62187808Sdas#include "gdtoa_fltrnds.h" 63187808Sdas#else 64187808Sdas#define fpi &fpi0 65187808Sdas#endif 66112158Sdas 67112158Sdas if (ndig < 0) 68112158Sdas ndig = 0; 69112158Sdas if (bufsize < ndig + 10) 70112158Sdas return 0; 71112158Sdas 72112158Sdas L = (ULong*)V; 73112158Sdas sign = L[_0] & 0x80000000L; 74112158Sdas bits[1] = L[_1]; 75112158Sdas bits[0] = L[_2]; 76112158Sdas if ( (ex = (L[_0] >> 16) & 0x7fff) !=0) { 77112158Sdas if (ex == 0x7fff) { 78112158Sdas /* Infinity or NaN */ 79112158Sdas if (bits[0] | bits[1]) 80112158Sdas b = strcp(buf, "NaN"); 81112158Sdas else { 82112158Sdas b = buf; 83112158Sdas if (sign) 84112158Sdas *b++ = '-'; 85112158Sdas b = strcp(b, "Infinity"); 86112158Sdas } 87112158Sdas return b; 88112158Sdas } 89112158Sdas i = STRTOG_Normal; 90112158Sdas } 91112158Sdas else if (bits[0] | bits[1]) { 92112158Sdas i = STRTOG_Denormal; 93112158Sdas } 94112158Sdas else { 95112158Sdas b = buf; 96112158Sdas#ifndef IGNORE_ZERO_SIGN 97112158Sdas if (sign) 98112158Sdas *b++ = '-'; 99112158Sdas#endif 100112158Sdas *b++ = '0'; 101112158Sdas *b = 0; 102112158Sdas return b; 103112158Sdas } 104112158Sdas ex -= 0x3fff + 63; 105112158Sdas mode = 2; 106112158Sdas if (ndig <= 0) { 107112158Sdas if (bufsize < 32) 108112158Sdas return 0; 109112158Sdas mode = 0; 110112158Sdas } 111187808Sdas s = gdtoa(fpi, ex, bits, &i, mode, ndig, &decpt, &se); 112187808Sdas return g__fmt(buf, s, se, decpt, sign, bufsize); 113112158Sdas } 114