1/* Internal function for converting integers to ASCII.
2 Copyright (C) 1994-1999,2002,2003,2007 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
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 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
19
20#ifndef _ITOA_H
21#define _ITOA_H
22
23/* Convert VALUE into ASCII in base BASE (2..16).
24 Write backwards starting the character just before BUFLIM.
25 Return the address of the first (left-to-right) character in the number.
26 Use upper case letters iff UPPER_CASE is nonzero. */
27
28static const char _itoa_lower_digits[16] = "0123456789abcdef";
29static const char _itoa_upper_digits[16] = "0123456789ABCDEF";
30
31static inline char * __attribute__ ((unused, always_inline))
32_itoa_word (unsigned long value, char *buflim,
33 unsigned int base, int upper_case)
34{
35 const char *digits = (upper_case ? _itoa_upper_digits : _itoa_lower_digits);
36
37 switch (base)
38 {
39# define SPECIAL(Base) \
40 case Base: \
41 do \
42 *--buflim = digits[value % Base]; \
43 while ((value /= Base) != 0); \
44 break
45
46 SPECIAL (10);
47 SPECIAL (16);
48 SPECIAL (8);
49 default:
50 do
51 *--buflim = digits[value % base];
52 while ((value /= base) != 0);
53 }
54 return buflim;
55}
56
57static inline char * __attribute__ ((unused, always_inline))
58_itoa (uint64_t value, char *buflim,
59 unsigned int base, int upper_case)
60{
61 const char *digits = (upper_case ? _itoa_upper_digits : _itoa_lower_digits);
62
63 switch (base)
64 {
65 SPECIAL (10);
66 SPECIAL (16);
67 SPECIAL (8);
68 default:
69 do
70 *--buflim = digits[value % base];
71 while ((value /= base) != 0);
72 }
73 return buflim;
74}
75# undef SPECIAL
76
77#endif /* itoa.h */
78