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