1 /* $NetBSD: itoa.c,v 1.1.1.1 2016/01/13 18:41:48 christos Exp $ */
2
3 /* Copyright (C) 1989, 1990, 1991, 1992, 2000, 2002, 2004
4 Free Software Foundation, Inc.
5 Written by James Clark (jjc@jclark.com)
6
7 This file is part of groff.
8
9 groff is free software; you can redistribute it and/or modify it under
10 the terms of the GNU General Public License as published by the Free
11 Software Foundation; either version 2, or (at your option) any later
12 version.
13
14 groff is distributed in the hope that it will be useful, but WITHOUT ANY
15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with groff; see the file COPYING. If not, write to the Free Software
21 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
22
23 #define INT_DIGITS 19 /* enough for 64 bit integer */
24 #define UINT_DIGITS 20
25
26 #ifdef __cplusplus
27 extern "C" {
28 #endif
29
i_to_a(int i)30 char *i_to_a(int i)
31 {
32 /* Room for INT_DIGITS digits, - and '\0' */
33 static char buf[INT_DIGITS + 2];
34 char *p = buf + INT_DIGITS + 1; /* points to terminating '\0' */
35 if (i >= 0) {
36 do {
37 *--p = '0' + (i % 10);
38 i /= 10;
39 } while (i != 0);
40 return p;
41 }
42 else { /* i < 0 */
43 do {
44 *--p = '0' - (i % 10);
45 i /= 10;
46 } while (i != 0);
47 *--p = '-';
48 }
49 return p;
50 }
51
ui_to_a(unsigned int i)52 char *ui_to_a(unsigned int i)
53 {
54 /* Room for UINT_DIGITS digits and '\0' */
55 static char buf[UINT_DIGITS + 1];
56 char *p = buf + UINT_DIGITS; /* points to terminating '\0' */
57 do {
58 *--p = '0' + (i % 10);
59 i /= 10;
60 } while (i != 0);
61 return p;
62 }
63
64 #ifdef __cplusplus
65 }
66 #endif
67