g__fmt.c revision 165743
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 40112158Sdasg__fmt(b, s, se, decpt, sign) char *b; char *s; char *se; int decpt; ULong sign; 41112158Sdas#else 42112158Sdasg__fmt(char *b, char *s, char *se, int decpt, ULong sign) 43112158Sdas#endif 44112158Sdas{ 45112158Sdas int i, j, k; 46112158Sdas char *s0 = s; 47112415Sdas#ifdef USE_LOCALE 48112415Sdas char decimalpoint = *localeconv()->decimal_point; 49112415Sdas#else 50112415Sdas#define decimalpoint '.' 51112415Sdas#endif 52112158Sdas if (sign) 53112158Sdas *b++ = '-'; 54112158Sdas if (decpt <= -4 || decpt > se - s + 5) { 55112158Sdas *b++ = *s++; 56112158Sdas if (*s) { 57112415Sdas *b++ = decimalpoint; 58112158Sdas while((*b = *s++) !=0) 59112158Sdas b++; 60112158Sdas } 61112158Sdas *b++ = 'e'; 62112158Sdas /* sprintf(b, "%+.2d", decpt - 1); */ 63112158Sdas if (--decpt < 0) { 64112158Sdas *b++ = '-'; 65112158Sdas decpt = -decpt; 66112158Sdas } 67112158Sdas else 68112158Sdas *b++ = '+'; 69112158Sdas for(j = 2, k = 10; 10*k <= decpt; j++, k *= 10){} 70112158Sdas for(;;) { 71112158Sdas i = decpt / k; 72112158Sdas *b++ = i + '0'; 73112158Sdas if (--j <= 0) 74112158Sdas break; 75112158Sdas decpt -= i*k; 76112158Sdas decpt *= 10; 77112158Sdas } 78112158Sdas *b = 0; 79112158Sdas } 80112158Sdas else if (decpt <= 0) { 81112415Sdas *b++ = decimalpoint; 82112158Sdas for(; decpt < 0; decpt++) 83112158Sdas *b++ = '0'; 84112158Sdas while((*b = *s++) !=0) 85112158Sdas b++; 86112158Sdas } 87112158Sdas else { 88112158Sdas while((*b = *s++) !=0) { 89112158Sdas b++; 90112158Sdas if (--decpt == 0 && *s) 91112415Sdas *b++ = decimalpoint; 92112158Sdas } 93112158Sdas for(; decpt > 0; decpt--) 94112158Sdas *b++ = '0'; 95112158Sdas *b = 0; 96112158Sdas } 97112158Sdas freedtoa(s0); 98112158Sdas return b; 99112158Sdas } 100