48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
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Written by James Clark (jjc@jclark.com)
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This file is part of groff.
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groff is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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groff is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License along
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with groff; see the file COPYING. If not, write to the Free Software
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Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#ifndef lint
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static char rcsid[] = "$Id: itoa.c,v 1.2 1993/08/02 17:44:04 mycroft Exp $";
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#endif /* not lint */
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#define INT_DIGITS 19 /* enough for 64 bit integer */
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char *itoa(i)
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int i;
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{
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/* Room for INT_DIGITS digits, - and '\0' */
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static char buf[INT_DIGITS + 2];
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char *p = buf + INT_DIGITS + 1; /* points to terminating '\0' */
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if (i >= 0) {
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do {
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*--p = '0' + (i % 10);
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i /= 10;
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} while (i != 0);
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return p;
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}
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else { /* i < 0 */
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do {
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*--p = '0' - (i % 10);
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i /= 10;
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} while (i != 0);
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*--p = '-';
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}
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return p;
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}
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