1/* Internal function for converting integers to ASCII.
2   Copyright (C) 1994,95,96,97,98,99,2002,2003 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 _ITOWA_H
21#define _ITOWA_H	1
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 wchar_t _itowa_lower_digits[16] = L_("0123456789abcdef");
29static const wchar_t _itowa_upper_digits[16] = L_("0123456789ABCDEF");
30
31static inline wchar_t *
32__attribute__ ((unused, always_inline))
33_itowa_word (unsigned long value, wchar_t *buflim,
34	     unsigned int base, int upper_case)
35{
36  const wchar_t *digits = (upper_case
37			   ? _itowa_upper_digits : _itowa_lower_digits);
38  wchar_t *bp = buflim;
39
40  switch (base)
41    {
42#define SPECIAL(Base)							      \
43    case Base:								      \
44      do								      \
45	*--bp = digits[value % Base];					      \
46      while ((value /= Base) != 0);					      \
47      break
48
49      SPECIAL (10);
50      SPECIAL (16);
51      SPECIAL (8);
52    default:
53      do
54	*--bp = digits[value % base];
55      while ((value /= base) != 0);
56    }
57  return bp;
58}
59
60static inline wchar_t *
61__attribute__ ((unused, always_inline))
62_itowa (uint64_t value, wchar_t *buflim,
63	unsigned int base, int upper_case)
64{
65  const wchar_t *digits = (upper_case
66			   ? _itowa_upper_digits : _itowa_lower_digits);
67  wchar_t *bp = buflim;
68
69  switch (base)
70    {
71      SPECIAL (10);
72      SPECIAL (16);
73      SPECIAL (8);
74    default:
75      do
76	*--bp = digits[value % base];
77      while ((value /= base) != 0);
78    }
79  return bp;
80}
81#undef SPECIAL
82
83#endif	/* itowa.h */
84