1 /* 2 * Copyright (C) 2014 The Android Open Source Project 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 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #pragma once 30 31 /** 32 * @file uchar.h 33 * @brief Unicode functions. 34 */ 35 36 #include <sys/cdefs.h> 37 38 #include <stddef.h> 39 40 #include <bits/bionic_multibyte_result.h> 41 #include <bits/mbstate_t.h> 42 43 __BEGIN_DECLS 44 45 #if !defined(__cplusplus) 46 /** The UTF-16 character type. */ 47 typedef __CHAR16_TYPE__ char16_t; 48 /** The UTF-32 character type. */ 49 typedef __CHAR32_TYPE__ char32_t; 50 #endif 51 52 /** On Android, char16_t is UTF-16. */ 53 #define __STD_UTF_16__ 1 54 55 /** On Android, char32_t is UTF-32. */ 56 #define __STD_UTF_32__ 1 57 58 /** 59 * [c16rtomb(3)](https://man7.org/linux/man-pages/man3/c16rtomb.3.html) converts a single UTF-16 60 * character to UTF-8. 61 * 62 * Returns the number of bytes written to `__buf` on success, and returns -1 and sets `errno` 63 * on failure. 64 */ 65 size_t c16rtomb(char* _Nullable __buf, char16_t __ch16, mbstate_t* _Nullable __ps); 66 67 /** 68 * [c32rtomb(3)](https://man7.org/linux/man-pages/man3/c32rtomb.3.html) converts a single UTF-32 69 * character to UTF-8. 70 * 71 * Returns the number of bytes written to `__buf` on success, and returns -1 and sets `errno` 72 * on failure. 73 */ 74 size_t c32rtomb(char* _Nullable __buf, char32_t __ch32, mbstate_t* _Nullable __ps); 75 76 /** 77 * [mbrtoc16(3)](https://man7.org/linux/man-pages/man3/mbrtoc16.3.html) converts the next UTF-8 78 * sequence to a UTF-16 code point. 79 */ 80 size_t mbrtoc16(char16_t* _Nullable __ch16, const char* _Nullable __s, size_t __n, mbstate_t* _Nullable __ps); 81 82 /** 83 * [mbrtoc32(3)](https://man7.org/linux/man-pages/man3/mbrtoc32.3.html) converts the next UTF-8 84 * sequence to a UTF-32 code point. 85 */ 86 size_t mbrtoc32(char32_t* _Nullable __ch32, const char* _Nullable __s, size_t __n, mbstate_t* _Nullable __ps); 87 88 __END_DECLS 89