Update.
[glibc.git] / stdio-common / _itoa.h
blob2794912c91be9de3b929f9949d5b8c35ac344c64
1 /* Internal function for converting integers to ASCII.
2 Copyright (C) 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
20 #ifndef _ITOA_H
21 #define _ITOA_H
22 #include <sys/cdefs.h>
24 /* Convert VALUE into ASCII in base BASE (2..36).
25 Write backwards starting the character just before BUFLIM.
26 Return the address of the first (left-to-right) character in the number.
27 Use upper case letters iff UPPER_CASE is nonzero. */
29 extern char *_itoa __P ((unsigned long long int value, char *buflim,
30 unsigned int base, int upper_case));
32 static inline char * __attribute__ ((unused))
33 _itoa_word (unsigned long value, char *buflim,
34 unsigned int base, int upper_case)
36 extern const char _itoa_upper_digits[], _itoa_lower_digits[];
37 const char *digits = upper_case ? _itoa_upper_digits : _itoa_lower_digits;
38 char *bp = buflim;
40 switch (base)
42 #define SPECIAL(Base) \
43 case Base: \
44 do \
45 *--bp = digits[value % Base]; \
46 while ((value /= Base) != 0); \
47 break
49 SPECIAL (10);
50 SPECIAL (16);
51 SPECIAL (8);
52 default:
54 *--bp = digits[value % base];
55 while ((value /= base) != 0);
57 return bp;
60 #endif /* itoa.h */