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
28 static const wchar_t _itowa_lower_digits[16] = L_("0123456789abcdef");
29 static const wchar_t _itowa_upper_digits[16] = L_("0123456789ABCDEF");
30
31 static inline wchar_t *
32 __attribute__ ((unused, always_inline))
_itowa_word(unsigned long value,wchar_t * buflim,unsigned int base,int upper_case)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
60 static inline wchar_t *
61 __attribute__ ((unused, always_inline))
_itowa(uint64_t value,wchar_t * buflim,unsigned int base,int upper_case)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