1/* Copyright (C) 2011-2023 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18/*
19 * ISO C11 Standard: 7.28
20 * Unicode utilities <uchar.h>
21 */
22
23#ifndef _UCHAR_H
24#define _UCHAR_H 1
25
26#include <features.h>
27
28#define __need_size_t
29#include <stddef.h>
30
31#include <bits/types.h>
32#include <bits/types/mbstate_t.h>
33
34/* Declare the C2x char8_t typedef in C2x modes, but only if the C++
35 __cpp_char8_t feature test macro is not defined. */
36#if __GLIBC_USE (ISOC2X) && !defined __cpp_char8_t
37#if __GNUC_PREREQ (10, 0) && defined __cplusplus
38/* Suppress the diagnostic regarding char8_t being a keyword in C++20. */
39# pragma GCC diagnostic push
40# pragma GCC diagnostic ignored "-Wc++20-compat"
41#endif
42/* Define the 8-bit character type. */
43typedef unsigned char char8_t;
44#if __GNUC_PREREQ (10, 0) && defined __cplusplus
45# pragma GCC diagnostic pop
46#endif
47#endif
48
49#ifndef __USE_ISOCXX11
50/* Define the 16-bit and 32-bit character types. */
51typedef __uint_least16_t char16_t;
52typedef __uint_least32_t char32_t;
53#endif
54
55
56__BEGIN_DECLS
57
58/* Declare the C2x mbrtoc8() and c8rtomb() functions in C2x modes or if
59 the C++ __cpp_char8_t feature test macro is defined. */
60#if __GLIBC_USE (ISOC2X) || defined __cpp_char8_t
61/* Write char8_t representation of multibyte character pointed
62 to by S to PC8. */
63extern size_t mbrtoc8 (char8_t *__restrict __pc8,
64 const char *__restrict __s, size_t __n,
65 mbstate_t *__restrict __p) __THROW;
66
67/* Write multibyte representation of char8_t C8 to S. */
68extern size_t c8rtomb (char *__restrict __s, char8_t __c8,
69 mbstate_t *__restrict __ps) __THROW;
70#endif
71
72/* Write char16_t representation of multibyte character pointed
73 to by S to PC16. */
74extern size_t mbrtoc16 (char16_t *__restrict __pc16,
75 const char *__restrict __s, size_t __n,
76 mbstate_t *__restrict __p) __THROW;
77
78/* Write multibyte representation of char16_t C16 to S. */
79extern size_t c16rtomb (char *__restrict __s, char16_t __c16,
80 mbstate_t *__restrict __ps) __THROW;
81
82
83
84/* Write char32_t representation of multibyte character pointed
85 to by S to PC32. */
86extern size_t mbrtoc32 (char32_t *__restrict __pc32,
87 const char *__restrict __s, size_t __n,
88 mbstate_t *__restrict __p) __THROW;
89
90/* Write multibyte representation of char32_t C32 to S. */
91extern size_t c32rtomb (char *__restrict __s, char32_t __c32,
92 mbstate_t *__restrict __ps) __THROW;
93
94__END_DECLS
95
96#endif /* uchar.h */
97