itoa.c revision 296373
1/* Copyright (C) 1989, 1990, 1991, 1992, 2000, 2002, 2004 2 Free Software Foundation, Inc. 3 Written by James Clark (jjc@jclark.com) 4 5This file is part of groff. 6 7groff is free software; you can redistribute it and/or modify it under 8the terms of the GNU General Public License as published by the Free 9Software Foundation; either version 2, or (at your option) any later 10version. 11 12groff is distributed in the hope that it will be useful, but WITHOUT ANY 13WARRANTY; without even the implied warranty of MERCHANTABILITY or 14FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15for more details. 16 17You should have received a copy of the GNU General Public License along 18with groff; see the file COPYING. If not, write to the Free Software 19Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */ 20 21#define INT_DIGITS 19 /* enough for 64 bit integer */ 22#define UINT_DIGITS 20 23 24#ifdef __cplusplus 25extern "C" { 26#endif 27 28char *i_to_a(int i) 29{ 30 /* Room for INT_DIGITS digits, - and '\0' */ 31 static char buf[INT_DIGITS + 2]; 32 char *p = buf + INT_DIGITS + 1; /* points to terminating '\0' */ 33 if (i >= 0) { 34 do { 35 *--p = '0' + (i % 10); 36 i /= 10; 37 } while (i != 0); 38 return p; 39 } 40 else { /* i < 0 */ 41 do { 42 *--p = '0' - (i % 10); 43 i /= 10; 44 } while (i != 0); 45 *--p = '-'; 46 } 47 return p; 48} 49 50char *ui_to_a(unsigned int i) 51{ 52 /* Room for UINT_DIGITS digits and '\0' */ 53 static char buf[UINT_DIGITS + 1]; 54 char *p = buf + UINT_DIGITS; /* points to terminating '\0' */ 55 do { 56 *--p = '0' + (i % 10); 57 i /= 10; 58 } while (i != 0); 59 return p; 60} 61 62#ifdef __cplusplus 63} 64#endif 65