1 /* Copyright (C) 1989, 1990, 1991, 1992, 2000, 2004, 2009
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 3 of the License, or
10 (at your option) any later version.
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
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #define INT_DIGITS 19 /* enough for 64-bit integer */
26 char *if_to_a(int i, int decimal_point)
28 /* room for a -, INT_DIGITS digits, a decimal point, and a terminating '\0' */
29 static char buf[INT_DIGITS + 3];
30 char *p = buf + INT_DIGITS + 2;
32 buf[INT_DIGITS + 2] = '\0';
33 /* assert(decimal_point <= INT_DIGITS); */
36 *--p = '0' + (i % 10);
38 if (++point == decimal_point)
40 } while (i != 0 || point < decimal_point);
44 *--p = '0' - (i % 10);
46 if (++point == decimal_point)
48 } while (i != 0 || point < decimal_point);
51 if (decimal_point > 0) {
53 /* there must be a dot, so this will terminate */
54 for (q = buf + INT_DIGITS + 2; q[-1] == '0'; --q)