1 /* Copyright (C) 1989, 1990, 1991, 1992, 2000, 2004
2 Free Software Foundation, Inc.
3 Written by James Clark (jjc@jclark.com)
5 This file is part of groff.
7 groff is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 groff is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License along
18 with groff; see the file COPYING. If not, write to the Free Software
19 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
21 #define INT_DIGITS 19 /* enough for 64-bit integer */
27 char *if_to_a(int i, int decimal_point)
29 /* room for a -, INT_DIGITS digits, a decimal point, and a terminating '\0' */
30 static char buf[INT_DIGITS + 3];
31 char *p = buf + INT_DIGITS + 2;
33 buf[INT_DIGITS + 2] = '\0';
34 /* assert(decimal_point <= INT_DIGITS); */
37 *--p = '0' + (i % 10);
39 if (++point == decimal_point)
41 } while (i != 0 || point < decimal_point);
45 *--p = '0' - (i % 10);
47 if (++point == decimal_point)
49 } while (i != 0 || point < decimal_point);
52 if (decimal_point > 0) {
54 /* there must be a dot, so this will terminate */
55 for (q = buf + INT_DIGITS + 2; q[-1] == '0'; --q)