source: mainline/abi/include/_bits/wchar_limits.h

Last change on this file was 28a5ebd, checked in by Martin Decky <martin@…>, 5 years ago

Use char32_t instead of wchat_t to represent UTF-32 strings

The intention of the native HelenOS string API has been always to
support Unicode in the UTF-8 and UTF-32 encodings as the sole character
representations and ignore the obsolete mess of older single-byte and
multibyte character encodings. Before C11, the wchar_t type has been
slightly misused for the purpose of the UTF-32 strings. The newer
char32_t type is obviously a much more suitable option. The standard
defines char32_t as uint_least32_t, thus we can take the liberty to fix
it to uint32_t.

To maintain compatilibity with the C Standard, the putwchar(wchar_t)
functions has been replaced by our custom putuchar(char32_t) functions
where appropriate.

  • Property mode set to 100644
File size: 2.0 KB
Line 
1/*
2 * Copyright (c) 2017 CZ.NIC, z.s.p.o.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/*
30 * Authors:
31 * Jiří Zárevúcky (jzr) <zarevucky.jiri@gmail.com>
32 */
33
34/** @addtogroup bits
35 * @{
36 */
37/** @file
38 */
39
40#ifndef _BITS_WCHAR_LIMITS_H_
41#define _BITS_WCHAR_LIMITS_H_
42
43/* wchar_t should always be int32_t in HelenOS. */
44
45#include <_bits/wchar_t.h>
46
47#ifndef __cplusplus
48_Static_assert(((wchar_t) -1) < 0, "wchar_t is not int32_t");
49_Static_assert(sizeof(wchar_t) == 4, "wchar_t is not int32_t");
50#endif
51
52#ifndef WCHAR_MAX
53#define WCHAR_MAX 0x7fffffff
54#endif
55#ifndef WCHAR_MIN
56#define WCHAR_MIN (-WCHAR_MIN - 1)
57#endif
58
59#endif
60
61/** @}
62 */
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