1 /* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
2 Written by James Clark (jjc@jclark.com)
4 This file is part of groff.
6 groff is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 2, or (at your option) any later
11 groff is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License along
17 with groff; see the file COPYING. If not, write to the Free Software
18 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20 #define INT_DIGITS 19 /* enough for 64-bit integer */
22 char *iftoa(i, decimal_point)
25 /* room for a -, INT_DIGITS digits, a decimal point, and a terminating '\0' */
26 static char buf[INT_DIGITS + 3];
27 char *p = buf + INT_DIGITS + 2;
29 buf[INT_DIGITS + 2] = '\0';
30 /* assert(decimal_point <= INT_DIGITS); */
33 *--p = '0' + (i % 10);
35 if (++point == decimal_point)
37 } while (i != 0 || point < decimal_point);
41 *--p = '0' - (i % 10);
43 if (++point == decimal_point)
45 } while (i != 0 || point < decimal_point);
48 if (decimal_point > 0) {
50 /* there must be a dot, so this will terminate */
51 for (q = buf + INT_DIGITS + 2; q[-1] == '0'; --q)