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 34112415Sdas#ifdef USE_LOCALE 35112415Sdas#include "locale.h" 36112415Sdas#endif 37112415Sdas 38112158Sdas char * 39112158Sdas#ifdef KR_headers 40187808Sdasg__fmt(b, s, se, decpt, sign, blen) char *b; char *s; char *se; int decpt; ULong sign; size_t blen; 41112158Sdas#else 42187808Sdasg__fmt(char *b, char *s, char *se, int decpt, ULong sign, size_t blen) 43112158Sdas#endif 44112158Sdas{ 45112158Sdas int i, j, k; 46187808Sdas char *be, *s0; 47187808Sdas size_t len; 48112415Sdas#ifdef USE_LOCALE 49187808Sdas#ifdef NO_LOCALE_CACHE 50187808Sdas char *decimalpoint = localeconv()->decimal_point; 51187808Sdas size_t dlen = strlen(decimalpoint); 52112415Sdas#else 53187808Sdas char *decimalpoint; 54187808Sdas static char *decimalpoint_cache; 55187808Sdas static size_t dlen; 56187808Sdas if (!(s0 = decimalpoint_cache)) { 57187808Sdas s0 = localeconv()->decimal_point; 58187808Sdas dlen = strlen(s0); 59219557Sdas if ((decimalpoint_cache = (char*)MALLOC(strlen(s0) + 1))) { 60187808Sdas strcpy(decimalpoint_cache, s0); 61187808Sdas s0 = decimalpoint_cache; 62187808Sdas } 63187808Sdas } 64187808Sdas decimalpoint = s0; 65112415Sdas#endif 66187808Sdas#else 67187808Sdas#define dlen 0 68187808Sdas#endif 69187808Sdas s0 = s; 70187808Sdas len = (se-s) + dlen + 6; /* 6 = sign + e+dd + trailing null */ 71187808Sdas if (blen < len) 72187808Sdas goto ret0; 73187808Sdas be = b + blen - 1; 74112158Sdas if (sign) 75112158Sdas *b++ = '-'; 76112158Sdas if (decpt <= -4 || decpt > se - s + 5) { 77112158Sdas *b++ = *s++; 78112158Sdas if (*s) { 79187808Sdas#ifdef USE_LOCALE 80187808Sdas while((*b = *decimalpoint++)) 81187808Sdas ++b; 82187808Sdas#else 83187808Sdas *b++ = '.'; 84187808Sdas#endif 85112158Sdas while((*b = *s++) !=0) 86112158Sdas b++; 87112158Sdas } 88112158Sdas *b++ = 'e'; 89112158Sdas /* sprintf(b, "%+.2d", decpt - 1); */ 90112158Sdas if (--decpt < 0) { 91112158Sdas *b++ = '-'; 92112158Sdas decpt = -decpt; 93112158Sdas } 94112158Sdas else 95112158Sdas *b++ = '+'; 96112158Sdas for(j = 2, k = 10; 10*k <= decpt; j++, k *= 10){} 97112158Sdas for(;;) { 98112158Sdas i = decpt / k; 99187808Sdas if (b >= be) 100187808Sdas goto ret0; 101112158Sdas *b++ = i + '0'; 102112158Sdas if (--j <= 0) 103112158Sdas break; 104112158Sdas decpt -= i*k; 105112158Sdas decpt *= 10; 106112158Sdas } 107112158Sdas *b = 0; 108112158Sdas } 109112158Sdas else if (decpt <= 0) { 110187808Sdas#ifdef USE_LOCALE 111187808Sdas while((*b = *decimalpoint++)) 112187808Sdas ++b; 113187808Sdas#else 114187808Sdas *b++ = '.'; 115187808Sdas#endif 116187808Sdas if (be < b - decpt + (se - s)) 117187808Sdas goto ret0; 118112158Sdas for(; decpt < 0; decpt++) 119112158Sdas *b++ = '0'; 120187808Sdas while((*b = *s++) != 0) 121112158Sdas b++; 122112158Sdas } 123112158Sdas else { 124187808Sdas while((*b = *s++) != 0) { 125112158Sdas b++; 126187808Sdas if (--decpt == 0 && *s) { 127187808Sdas#ifdef USE_LOCALE 128187808Sdas while(*b = *decimalpoint++) 129187808Sdas ++b; 130187808Sdas#else 131187808Sdas *b++ = '.'; 132187808Sdas#endif 133187808Sdas } 134112158Sdas } 135187808Sdas if (b + decpt > be) { 136187808Sdas ret0: 137187808Sdas b = 0; 138187808Sdas goto ret; 139187808Sdas } 140112158Sdas for(; decpt > 0; decpt--) 141112158Sdas *b++ = '0'; 142112158Sdas *b = 0; 143112158Sdas } 144187808Sdas ret: 145112158Sdas freedtoa(s0); 146112158Sdas return b; 147112158Sdas } 148