glibc (2.38)
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. */
43 typedef 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. */
51 typedef __uint_least16_t char16_t;
52 typedef __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. */
63 extern 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. */
68 extern 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. */
74 extern 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. */
79 extern 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. */
86 extern 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. */
91 extern size_t c32rtomb (char *__restrict __s, char32_t __c32,
92 mbstate_t *__restrict __ps) __THROW;
93
94 __END_DECLS
95
96 #endif /* uchar.h */
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