/**************************************************************** The author of this software is David M. Gay. Copyright (C) 1998 by Lucent Technologies All Rights Reserved Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that the copyright notice and this permission notice and warranty disclaimer appear in supporting documentation, and that the name of Lucent or any of its entities not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. ****************************************************************/ /* Please send bug reports to David M. Gay (dmg at acm dot org, * with " at " changed at "@" and " dot " changed to "."). */ #include "gdtoaimp.h" #ifdef USE_LOCALE #include "locale.h" #endif char * #ifdef KR_headers g__fmt(b, s, se, decpt, sign, blen) char *b; char *s; char *se; int decpt; ULong sign; size_t blen; #else g__fmt(char *b, char *s, char *se, int decpt, ULong sign, size_t blen) #endif { int i, j, k; char *be, *s0; size_t len; #ifdef USE_LOCALE #ifdef NO_LOCALE_CACHE char *decimalpoint = localeconv()->decimal_point; size_t dlen = strlen(decimalpoint); #else char *decimalpoint; static char *decimalpoint_cache; static size_t dlen; if (!(s0 = decimalpoint_cache)) { s0 = localeconv()->decimal_point; dlen = strlen(s0); if ((decimalpoint_cache = (char*)malloc(dlen + 1))) { strlcpy(decimalpoint_cache, s0, dlen + 1); s0 = decimalpoint_cache; } } decimalpoint = s0; #endif #else #define dlen 0 #endif s0 = s; len = (se-s) + dlen + 6; /* 6 = sign + e+dd + trailing null */ if (blen < len) goto ret0; be = b + blen - 1; if (sign) *b++ = '-'; if (decpt <= -4 || decpt > se - s + 5) { *b++ = *s++; if (*s) { #ifdef USE_LOCALE while((*b = *decimalpoint++)) ++b; #else *b++ = '.'; #endif while((*b = *s++) !=0) b++; } *b++ = 'e'; /* sprintf(b, "%+.2d", decpt - 1); */ if (--decpt < 0) { *b++ = '-'; decpt = -decpt; } else *b++ = '+'; for(j = 2, k = 10; 10*k <= decpt; j++, k *= 10){} for(;;) { i = decpt / k; if (b >= be) goto ret0; *b++ = i + '0'; if (--j <= 0) break; decpt -= i*k; decpt *= 10; } *b = 0; } else if (decpt <= 0) { #ifdef USE_LOCALE while((*b = *decimalpoint++)) ++b; #else *b++ = '.'; #endif if (be < b - decpt + (se - s)) goto ret0; for(; decpt < 0; decpt++) *b++ = '0'; while((*b = *s++) != 0) b++; } else { while((*b = *s++) != 0) { b++; if (--decpt == 0 && *s) { #ifdef USE_LOCALE while(*b = *decimalpoint++) ++b; #else *b++ = '.'; #endif } } if (b + decpt > be) { ret0: b = 0; goto ret; } for(; decpt > 0; decpt--) *b++ = '0'; *b = 0; } ret: freedtoa(s0); return b; }