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729 lines
30 KiB
C
729 lines
30 KiB
C
/*
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* Copyright (c) 2014-2021 Steven G. Johnson, Jiahao Chen, Peter Colberg, Tony Kelman, Scott P. Jones, and other contributors.
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* Copyright (c) 2009 Public Software Group e. V., Berlin, Germany
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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/**
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* @mainpage
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*
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* utf8proc is a free/open-source (MIT/expat licensed) C library
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* providing Unicode normalization, case-folding, and other operations
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* for strings in the UTF-8 encoding, supporting up-to-date Unicode versions.
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* See the utf8proc home page (http://julialang.org/utf8proc/)
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* for downloads and other information, or the source code on github
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* (https://github.com/JuliaLang/utf8proc).
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*
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* For the utf8proc API documentation, see: @ref utf8proc.h
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*
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* The features of utf8proc include:
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*
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* - Transformation of strings (utf8proc_map()) to:
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* - decompose (@ref UTF8PROC_DECOMPOSE) or compose (@ref UTF8PROC_COMPOSE) Unicode combining characters (http://en.wikipedia.org/wiki/Combining_character)
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* - canonicalize Unicode compatibility characters (@ref UTF8PROC_COMPAT)
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* - strip "ignorable" (@ref UTF8PROC_IGNORE) characters, control characters (@ref UTF8PROC_STRIPCC), or combining characters such as accents (@ref UTF8PROC_STRIPMARK)
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* - case-folding (@ref UTF8PROC_CASEFOLD)
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* - Unicode normalization: utf8proc_NFD(), utf8proc_NFC(), utf8proc_NFKD(), utf8proc_NFKC()
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* - Detecting grapheme boundaries (utf8proc_grapheme_break() and @ref UTF8PROC_CHARBOUND)
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* - Character-width computation: utf8proc_charwidth()
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* - Classification of characters by Unicode category: utf8proc_category() and utf8proc_category_string()
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* - Encode (utf8proc_encode_char()) and decode (utf8proc_iterate()) Unicode codepoints to/from UTF-8.
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*/
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/** @file */
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#ifndef UTF8PROC_H
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#define UTF8PROC_H
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/** @name API version
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*
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* The utf8proc API version MAJOR.MINOR.PATCH, following
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* semantic-versioning rules (http://semver.org) based on API
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* compatibility.
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*
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* This is also returned at runtime by utf8proc_version(); however, the
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* runtime version may append a string like "-dev" to the version number
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* for prerelease versions.
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*
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* @note The shared-library version number in the Makefile
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* (and CMakeLists.txt, and MANIFEST) may be different,
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* being based on ABI compatibility rather than API compatibility.
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*/
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/** @{ */
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/** The MAJOR version number (increased when backwards API compatibility is broken). */
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#define UTF8PROC_VERSION_MAJOR 2
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/** The MINOR version number (increased when new functionality is added in a backwards-compatible manner). */
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#define UTF8PROC_VERSION_MINOR 9
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/** The PATCH version (increased for fixes that do not change the API). */
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#define UTF8PROC_VERSION_PATCH 0
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/** @} */
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#include <stdlib.h>
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#include "ncexternl.h"
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#if defined(_MSC_VER) && _MSC_VER < 1800
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// MSVC prior to 2013 lacked stdbool.h and stdint.h
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typedef signed char nc_utf8proc_int8_t;
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typedef unsigned char nc_utf8proc_uint8_t;
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typedef short nc_utf8proc_int16_t;
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typedef unsigned short nc_utf8proc_uint16_t;
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typedef int nc_utf8proc_int32_t;
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typedef unsigned int nc_utf8proc_uint32_t;
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# ifdef _WIN64
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typedef __int64 nc_utf8proc_ssize_t;
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typedef unsigned __int64 nc_utf8proc_size_t;
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# else
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typedef int nc_utf8proc_ssize_t;
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typedef unsigned int nc_utf8proc_size_t;
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# endif
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# ifndef __cplusplus
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// emulate C99 bool
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typedef unsigned char nc_utf8proc_bool;
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# ifndef __bool_true_false_are_defined
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# define false 0
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# define true 1
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# define __bool_true_false_are_defined 1
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# endif
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# else
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typedef bool nc_utf8proc_bool;
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# endif
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#else
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# include <stddef.h>
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# include <stdbool.h>
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# include <stdint.h>
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typedef int8_t nc_utf8proc_int8_t;
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typedef uint8_t nc_utf8proc_uint8_t;
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typedef int16_t nc_utf8proc_int16_t;
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typedef uint16_t nc_utf8proc_uint16_t;
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typedef int32_t nc_utf8proc_int32_t;
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typedef uint32_t nc_utf8proc_uint32_t;
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typedef size_t nc_utf8proc_size_t;
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typedef ptrdiff_t nc_utf8proc_ssize_t;
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typedef bool nc_utf8proc_bool;
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#endif
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#include <limits.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Option flags used by several functions in the library.
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*/
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typedef enum {
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/** The given UTF-8 input is NULL terminated. */
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UTF8PROC_NULLTERM = (1<<0),
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/** Unicode Versioning Stability has to be respected. */
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UTF8PROC_STABLE = (1<<1),
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/** Compatibility decomposition (i.e. formatting information is lost). */
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UTF8PROC_COMPAT = (1<<2),
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/** Return a result with decomposed characters. */
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UTF8PROC_COMPOSE = (1<<3),
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/** Return a result with decomposed characters. */
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UTF8PROC_DECOMPOSE = (1<<4),
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/** Strip "default ignorable characters" such as SOFT-HYPHEN or ZERO-WIDTH-SPACE. */
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UTF8PROC_IGNORE = (1<<5),
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/** Return an error, if the input contains unassigned codepoints. */
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UTF8PROC_REJECTNA = (1<<6),
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/**
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* Indicating that NLF-sequences (LF, CRLF, CR, NEL) are representing a
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* line break, and should be converted to the codepoint for line
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* separation (LS).
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*/
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UTF8PROC_NLF2LS = (1<<7),
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/**
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* Indicating that NLF-sequences are representing a paragraph break, and
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* should be converted to the codepoint for paragraph separation
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* (PS).
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*/
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UTF8PROC_NLF2PS = (1<<8),
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/** Indicating that the meaning of NLF-sequences is unknown. */
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UTF8PROC_NLF2LF = (UTF8PROC_NLF2LS | UTF8PROC_NLF2PS),
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/** Strips and/or convers control characters.
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*
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* NLF-sequences are transformed into space, except if one of the
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* NLF2LS/PS/LF options is given. HorizontalTab (HT) and FormFeed (FF)
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* are treated as a NLF-sequence in this case. All other control
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* characters are simply removed.
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*/
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UTF8PROC_STRIPCC = (1<<9),
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/**
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* Performs unicode case folding, to be able to do a case-insensitive
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* string comparison.
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*/
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UTF8PROC_CASEFOLD = (1<<10),
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/**
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* Inserts 0xFF bytes at the beginning of each sequence which is
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* representing a single grapheme cluster (see UAX#29).
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*/
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UTF8PROC_CHARBOUND = (1<<11),
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/** Lumps certain characters together.
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*
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* E.g. HYPHEN U+2010 and MINUS U+2212 to ASCII "-". See lump.md for details.
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*
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* If NLF2LF is set, this includes a transformation of paragraph and
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* line separators to ASCII line-feed (LF).
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*/
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UTF8PROC_LUMP = (1<<12),
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/** Strips all character markings.
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*
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* This includes non-spacing, spacing and enclosing (i.e. accents).
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* @note This option works only with @ref UTF8PROC_COMPOSE or
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* @ref UTF8PROC_DECOMPOSE
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*/
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UTF8PROC_STRIPMARK = (1<<13),
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/**
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* Strip unassigned codepoints.
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*/
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UTF8PROC_STRIPNA = (1<<14),
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} nc_utf8proc_option_t;
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/** @name Error codes
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* Error codes being returned by almost all functions.
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*/
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/** @{ */
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/** Memory could not be allocated. */
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#define UTF8PROC_ERROR_NOMEM -1
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/** The given string is too long to be processed. */
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#define UTF8PROC_ERROR_OVERFLOW -2
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/** The given string is not a legal UTF-8 string. */
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#define UTF8PROC_ERROR_INVALIDUTF8 -3
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/** The @ref UTF8PROC_REJECTNA flag was set and an unassigned codepoint was found. */
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#define UTF8PROC_ERROR_NOTASSIGNED -4
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/** Invalid options have been used. */
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#define UTF8PROC_ERROR_INVALIDOPTS -5
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/** @} */
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/* @name Types */
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/** Holds the value of a property. */
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typedef nc_utf8proc_int16_t nc_utf8proc_propval_t;
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/** Struct containing information about a codepoint. */
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typedef struct nc_utf8proc_property_struct {
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/**
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* Unicode category.
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* @see nc_utf8proc_category_t.
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*/
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nc_utf8proc_propval_t category;
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nc_utf8proc_propval_t combining_class;
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/**
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* Bidirectional class.
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* @see nc_utf8proc_bidi_class_t.
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*/
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nc_utf8proc_propval_t bidi_class;
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/**
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* @anchor Decomposition type.
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* @see nc_utf8proc_decomp_type_t.
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*/
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nc_utf8proc_propval_t decomp_type;
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nc_utf8proc_uint16_t decomp_seqindex;
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nc_utf8proc_uint16_t casefold_seqindex;
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nc_utf8proc_uint16_t uppercase_seqindex;
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nc_utf8proc_uint16_t lowercase_seqindex;
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nc_utf8proc_uint16_t titlecase_seqindex;
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nc_utf8proc_uint16_t comb_index;
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unsigned bidi_mirrored:1;
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unsigned comp_exclusion:1;
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/**
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* Can this codepoint be ignored?
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*
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* Used by nc_utf8proc_decompose_char() when @ref UTF8PROC_IGNORE is
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* passed as an option.
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*/
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unsigned ignorable:1;
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unsigned control_boundary:1;
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/** The width of the codepoint. */
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unsigned charwidth:2;
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unsigned pad:2;
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/**
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* Boundclass.
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* @see nc_utf8proc_boundclass_t.
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*/
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unsigned boundclass:6;
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unsigned indic_conjunct_break:2;
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} nc_utf8proc_property_t;
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/** Unicode categories. */
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typedef enum {
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UTF8PROC_CATEGORY_CN = 0, /**< Other, not assigned */
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UTF8PROC_CATEGORY_LU = 1, /**< Letter, uppercase */
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UTF8PROC_CATEGORY_LL = 2, /**< Letter, lowercase */
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UTF8PROC_CATEGORY_LT = 3, /**< Letter, titlecase */
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UTF8PROC_CATEGORY_LM = 4, /**< Letter, modifier */
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UTF8PROC_CATEGORY_LO = 5, /**< Letter, other */
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UTF8PROC_CATEGORY_MN = 6, /**< Mark, nonspacing */
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UTF8PROC_CATEGORY_MC = 7, /**< Mark, spacing combining */
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UTF8PROC_CATEGORY_ME = 8, /**< Mark, enclosing */
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UTF8PROC_CATEGORY_ND = 9, /**< Number, decimal digit */
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UTF8PROC_CATEGORY_NL = 10, /**< Number, letter */
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UTF8PROC_CATEGORY_NO = 11, /**< Number, other */
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UTF8PROC_CATEGORY_PC = 12, /**< Punctuation, connector */
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UTF8PROC_CATEGORY_PD = 13, /**< Punctuation, dash */
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UTF8PROC_CATEGORY_PS = 14, /**< Punctuation, open */
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UTF8PROC_CATEGORY_PE = 15, /**< Punctuation, close */
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UTF8PROC_CATEGORY_PI = 16, /**< Punctuation, initial quote */
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UTF8PROC_CATEGORY_PF = 17, /**< Punctuation, final quote */
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UTF8PROC_CATEGORY_PO = 18, /**< Punctuation, other */
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UTF8PROC_CATEGORY_SM = 19, /**< Symbol, math */
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UTF8PROC_CATEGORY_SC = 20, /**< Symbol, currency */
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UTF8PROC_CATEGORY_SK = 21, /**< Symbol, modifier */
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UTF8PROC_CATEGORY_SO = 22, /**< Symbol, other */
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UTF8PROC_CATEGORY_ZS = 23, /**< Separator, space */
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UTF8PROC_CATEGORY_ZL = 24, /**< Separator, line */
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UTF8PROC_CATEGORY_ZP = 25, /**< Separator, paragraph */
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UTF8PROC_CATEGORY_CC = 26, /**< Other, control */
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UTF8PROC_CATEGORY_CF = 27, /**< Other, format */
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UTF8PROC_CATEGORY_CS = 28, /**< Other, surrogate */
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UTF8PROC_CATEGORY_CO = 29, /**< Other, private use */
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} nc_utf8proc_category_t;
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/** Bidirectional character classes. */
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typedef enum {
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UTF8PROC_BIDI_CLASS_L = 1, /**< Left-to-Right */
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UTF8PROC_BIDI_CLASS_LRE = 2, /**< Left-to-Right Embedding */
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UTF8PROC_BIDI_CLASS_LRO = 3, /**< Left-to-Right Override */
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UTF8PROC_BIDI_CLASS_R = 4, /**< Right-to-Left */
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UTF8PROC_BIDI_CLASS_AL = 5, /**< Right-to-Left Arabic */
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UTF8PROC_BIDI_CLASS_RLE = 6, /**< Right-to-Left Embedding */
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UTF8PROC_BIDI_CLASS_RLO = 7, /**< Right-to-Left Override */
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UTF8PROC_BIDI_CLASS_PDF = 8, /**< Pop Directional Format */
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UTF8PROC_BIDI_CLASS_EN = 9, /**< European Number */
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UTF8PROC_BIDI_CLASS_ES = 10, /**< European Separator */
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UTF8PROC_BIDI_CLASS_ET = 11, /**< European Number Terminator */
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UTF8PROC_BIDI_CLASS_AN = 12, /**< Arabic Number */
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UTF8PROC_BIDI_CLASS_CS = 13, /**< Common Number Separator */
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UTF8PROC_BIDI_CLASS_NSM = 14, /**< Nonspacing Mark */
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UTF8PROC_BIDI_CLASS_BN = 15, /**< Boundary Neutral */
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UTF8PROC_BIDI_CLASS_B = 16, /**< Paragraph Separator */
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UTF8PROC_BIDI_CLASS_S = 17, /**< Segment Separator */
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UTF8PROC_BIDI_CLASS_WS = 18, /**< Whitespace */
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UTF8PROC_BIDI_CLASS_ON = 19, /**< Other Neutrals */
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UTF8PROC_BIDI_CLASS_LRI = 20, /**< Left-to-Right Isolate */
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UTF8PROC_BIDI_CLASS_RLI = 21, /**< Right-to-Left Isolate */
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UTF8PROC_BIDI_CLASS_FSI = 22, /**< First Strong Isolate */
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UTF8PROC_BIDI_CLASS_PDI = 23, /**< Pop Directional Isolate */
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} nc_utf8proc_bidi_class_t;
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/** Decomposition type. */
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typedef enum {
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UTF8PROC_DECOMP_TYPE_FONT = 1, /**< Font */
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UTF8PROC_DECOMP_TYPE_NOBREAK = 2, /**< Nobreak */
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UTF8PROC_DECOMP_TYPE_INITIAL = 3, /**< Initial */
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UTF8PROC_DECOMP_TYPE_MEDIAL = 4, /**< Medial */
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UTF8PROC_DECOMP_TYPE_FINAL = 5, /**< Final */
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UTF8PROC_DECOMP_TYPE_ISOLATED = 6, /**< Isolated */
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UTF8PROC_DECOMP_TYPE_CIRCLE = 7, /**< Circle */
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UTF8PROC_DECOMP_TYPE_SUPER = 8, /**< Super */
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UTF8PROC_DECOMP_TYPE_SUB = 9, /**< Sub */
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UTF8PROC_DECOMP_TYPE_VERTICAL = 10, /**< Vertical */
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UTF8PROC_DECOMP_TYPE_WIDE = 11, /**< Wide */
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UTF8PROC_DECOMP_TYPE_NARROW = 12, /**< Narrow */
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UTF8PROC_DECOMP_TYPE_SMALL = 13, /**< Small */
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UTF8PROC_DECOMP_TYPE_SQUARE = 14, /**< Square */
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UTF8PROC_DECOMP_TYPE_FRACTION = 15, /**< Fraction */
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UTF8PROC_DECOMP_TYPE_COMPAT = 16, /**< Compat */
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} nc_utf8proc_decomp_type_t;
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/** Boundclass property. (TR29) */
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typedef enum {
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UTF8PROC_BOUNDCLASS_START = 0, /**< Start */
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UTF8PROC_BOUNDCLASS_OTHER = 1, /**< Other */
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UTF8PROC_BOUNDCLASS_CR = 2, /**< Cr */
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UTF8PROC_BOUNDCLASS_LF = 3, /**< Lf */
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UTF8PROC_BOUNDCLASS_CONTROL = 4, /**< Control */
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UTF8PROC_BOUNDCLASS_EXTEND = 5, /**< Extend */
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UTF8PROC_BOUNDCLASS_L = 6, /**< L */
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UTF8PROC_BOUNDCLASS_V = 7, /**< V */
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UTF8PROC_BOUNDCLASS_T = 8, /**< T */
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UTF8PROC_BOUNDCLASS_LV = 9, /**< Lv */
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UTF8PROC_BOUNDCLASS_LVT = 10, /**< Lvt */
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UTF8PROC_BOUNDCLASS_REGIONAL_INDICATOR = 11, /**< Regional indicator */
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UTF8PROC_BOUNDCLASS_SPACINGMARK = 12, /**< Spacingmark */
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UTF8PROC_BOUNDCLASS_PREPEND = 13, /**< Prepend */
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UTF8PROC_BOUNDCLASS_ZWJ = 14, /**< Zero Width Joiner */
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/* the following are no longer used in Unicode 11, but we keep
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the constants here for backward compatibility */
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UTF8PROC_BOUNDCLASS_E_BASE = 15, /**< Emoji Base */
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UTF8PROC_BOUNDCLASS_E_MODIFIER = 16, /**< Emoji Modifier */
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UTF8PROC_BOUNDCLASS_GLUE_AFTER_ZWJ = 17, /**< Glue_After_ZWJ */
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UTF8PROC_BOUNDCLASS_E_BASE_GAZ = 18, /**< E_BASE + GLUE_AFTER_ZJW */
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/* the Extended_Pictographic property is used in the Unicode 11
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grapheme-boundary rules, so we store it in the boundclass field */
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UTF8PROC_BOUNDCLASS_EXTENDED_PICTOGRAPHIC = 19,
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UTF8PROC_BOUNDCLASS_E_ZWG = 20, /* UTF8PROC_BOUNDCLASS_EXTENDED_PICTOGRAPHIC + ZWJ */
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} nc_utf8proc_boundclass_t;
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/** Indic_Conjunct_Break property. (TR44) */
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typedef enum {
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UTF8PROC_INDIC_CONJUNCT_BREAK_NONE = 0,
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UTF8PROC_INDIC_CONJUNCT_BREAK_LINKER = 1,
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UTF8PROC_INDIC_CONJUNCT_BREAK_CONSONANT = 2,
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UTF8PROC_INDIC_CONJUNCT_BREAK_EXTEND = 3,
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} nc_utf8proc_indic_conjunct_break_t;
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/**
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* Function pointer type passed to nc_utf8proc_map_custom() and
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* nc_utf8proc_decompose_custom(), which is used to specify a user-defined
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* mapping of codepoints to be applied in conjunction with other mappings.
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*/
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typedef nc_utf8proc_int32_t (*nc_utf8proc_custom_func)(nc_utf8proc_int32_t codepoint, void *data);
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/**
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* Array containing the byte lengths of a UTF-8 encoded codepoint based
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* on the first byte.
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*/
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extern const nc_utf8proc_int8_t nc_utf8proc_utf8class[256];
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/**
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* Returns the utf8proc API version as a string MAJOR.MINOR.PATCH
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* (http://semver.org format), possibly with a "-dev" suffix for
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* development versions.
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*/
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const char *nc_utf8proc_version(void);
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/**
|
|
* Returns the utf8proc supported Unicode version as a string MAJOR.MINOR.PATCH.
|
|
*/
|
|
const char *nc_utf8proc_unicode_version(void);
|
|
|
|
/**
|
|
* Returns an informative error string for the given utf8proc error code
|
|
* (e.g. the error codes returned by nc_utf8proc_map()).
|
|
*/
|
|
const char *nc_utf8proc_errmsg(nc_utf8proc_ssize_t errcode);
|
|
|
|
/**
|
|
* Reads a single codepoint from the UTF-8 sequence being pointed to by `str`.
|
|
* The maximum number of bytes read is `strlen`, unless `strlen` is
|
|
* negative (in which case up to 4 bytes are read).
|
|
*
|
|
* If a valid codepoint could be read, it is stored in the variable
|
|
* pointed to by `codepoint_ref`, otherwise that variable will be set to -1.
|
|
* In case of success, the number of bytes read is returned; otherwise, a
|
|
* negative error code is returned.
|
|
*/
|
|
EXTERNL nc_utf8proc_ssize_t nc_utf8proc_iterate(const nc_utf8proc_uint8_t *str, nc_utf8proc_ssize_t strlen, nc_utf8proc_int32_t *codepoint_ref);
|
|
|
|
/**
|
|
* Check if a codepoint is valid (regardless of whether it has been
|
|
* assigned a value by the current Unicode standard).
|
|
*
|
|
* @return 1 if the given `codepoint` is valid and otherwise return 0.
|
|
*/
|
|
nc_utf8proc_bool nc_utf8proc_codepoint_valid(nc_utf8proc_int32_t codepoint);
|
|
|
|
/**
|
|
* Encodes the codepoint as an UTF-8 string in the byte array pointed
|
|
* to by `dst`. This array must be at least 4 bytes long.
|
|
*
|
|
* In case of success the number of bytes written is returned, and
|
|
* otherwise 0 is returned.
|
|
*
|
|
* This function does not check whether `codepoint` is valid Unicode.
|
|
*/
|
|
nc_utf8proc_ssize_t nc_utf8proc_encode_char(nc_utf8proc_int32_t codepoint, nc_utf8proc_uint8_t *dst);
|
|
|
|
/**
|
|
* Look up the properties for a given codepoint.
|
|
*
|
|
* @param codepoint The Unicode codepoint.
|
|
*
|
|
* @returns
|
|
* A pointer to a (constant) struct containing information about
|
|
* the codepoint.
|
|
* @par
|
|
* If the codepoint is unassigned or invalid, a pointer to a special struct is
|
|
* returned in which `category` is 0 (@ref UTF8PROC_CATEGORY_CN).
|
|
*/
|
|
const nc_utf8proc_property_t *nc_utf8proc_get_property(nc_utf8proc_int32_t codepoint);
|
|
|
|
/** Decompose a codepoint into an array of codepoints.
|
|
*
|
|
* @param codepoint the codepoint.
|
|
* @param dst the destination buffer.
|
|
* @param bufsize the size of the destination buffer.
|
|
* @param options one or more of the following flags:
|
|
* - @ref UTF8PROC_REJECTNA - return an error `codepoint` is unassigned
|
|
* - @ref UTF8PROC_IGNORE - strip "default ignorable" codepoints
|
|
* - @ref UTF8PROC_CASEFOLD - apply Unicode casefolding
|
|
* - @ref UTF8PROC_COMPAT - replace certain codepoints with their
|
|
* compatibility decomposition
|
|
* - @ref UTF8PROC_CHARBOUND - insert 0xFF bytes before each grapheme cluster
|
|
* - @ref UTF8PROC_LUMP - lump certain different codepoints together
|
|
* - @ref UTF8PROC_STRIPMARK - remove all character marks
|
|
* - @ref UTF8PROC_STRIPNA - remove unassigned codepoints
|
|
* @param last_boundclass
|
|
* Pointer to an integer variable containing
|
|
* the previous codepoint's (boundclass + indic_conjunct_break << 1) if the @ref UTF8PROC_CHARBOUND
|
|
* option is used. If the string is being processed in order, this can be initialized to 0 for
|
|
* the beginning of the string, and is thereafter updated automatically. Otherwise, this parameter is ignored.
|
|
*
|
|
* @return
|
|
* In case of success, the number of codepoints written is returned; in case
|
|
* of an error, a negative error code is returned (nc_utf8proc_errmsg()).
|
|
* @par
|
|
* If the number of written codepoints would be bigger than `bufsize`, the
|
|
* required buffer size is returned, while the buffer will be overwritten with
|
|
* undefined data.
|
|
*/
|
|
nc_utf8proc_ssize_t nc_utf8proc_decompose_char(
|
|
nc_utf8proc_int32_t codepoint, nc_utf8proc_int32_t *dst, nc_utf8proc_ssize_t bufsize,
|
|
nc_utf8proc_option_t options, int *last_boundclass
|
|
);
|
|
|
|
/**
|
|
* The same as nc_utf8proc_decompose_char(), but acts on a whole UTF-8
|
|
* string and orders the decomposed sequences correctly.
|
|
*
|
|
* If the @ref UTF8PROC_NULLTERM flag in `options` is set, processing
|
|
* will be stopped, when a NULL byte is encountered, otherwise `strlen`
|
|
* bytes are processed. The result (in the form of 32-bit unicode
|
|
* codepoints) is written into the buffer being pointed to by
|
|
* `buffer` (which must contain at least `bufsize` entries). In case of
|
|
* success, the number of codepoints written is returned; in case of an
|
|
* error, a negative error code is returned (nc_utf8proc_errmsg()).
|
|
* See nc_utf8proc_decompose_custom() to supply additional transformations.
|
|
*
|
|
* If the number of written codepoints would be bigger than `bufsize`, the
|
|
* required buffer size is returned, while the buffer will be overwritten with
|
|
* undefined data.
|
|
*/
|
|
nc_utf8proc_ssize_t nc_utf8proc_decompose(
|
|
const nc_utf8proc_uint8_t *str, nc_utf8proc_ssize_t strlen,
|
|
nc_utf8proc_int32_t *buffer, nc_utf8proc_ssize_t bufsize, nc_utf8proc_option_t options
|
|
);
|
|
|
|
/**
|
|
* The same as nc_utf8proc_decompose(), but also takes a `custom_func` mapping function
|
|
* that is called on each codepoint in `str` before any other transformations
|
|
* (along with a `custom_data` pointer that is passed through to `custom_func`).
|
|
* The `custom_func` argument is ignored if it is `NULL`. See also nc_utf8proc_map_custom().
|
|
*/
|
|
nc_utf8proc_ssize_t nc_utf8proc_decompose_custom(
|
|
const nc_utf8proc_uint8_t *str, nc_utf8proc_ssize_t strlen,
|
|
nc_utf8proc_int32_t *buffer, nc_utf8proc_ssize_t bufsize, nc_utf8proc_option_t options,
|
|
nc_utf8proc_custom_func custom_func, void *custom_data
|
|
);
|
|
|
|
/**
|
|
* Normalizes the sequence of `length` codepoints pointed to by `buffer`
|
|
* in-place (i.e., the result is also stored in `buffer`).
|
|
*
|
|
* @param buffer the (native-endian UTF-32) unicode codepoints to re-encode.
|
|
* @param length the length (in codepoints) of the buffer.
|
|
* @param options a bitwise or (`|`) of one or more of the following flags:
|
|
* - @ref UTF8PROC_NLF2LS - convert LF, CRLF, CR and NEL into LS
|
|
* - @ref UTF8PROC_NLF2PS - convert LF, CRLF, CR and NEL into PS
|
|
* - @ref UTF8PROC_NLF2LF - convert LF, CRLF, CR and NEL into LF
|
|
* - @ref UTF8PROC_STRIPCC - strip or convert all non-affected control characters
|
|
* - @ref UTF8PROC_COMPOSE - try to combine decomposed codepoints into composite
|
|
* codepoints
|
|
* - @ref UTF8PROC_STABLE - prohibit combining characters that would violate
|
|
* the unicode versioning stability
|
|
*
|
|
* @return
|
|
* In case of success, the length (in codepoints) of the normalized UTF-32 string is
|
|
* returned; otherwise, a negative error code is returned (nc_utf8proc_errmsg()).
|
|
*
|
|
* @warning The entries of the array pointed to by `str` have to be in the
|
|
* range `0x0000` to `0x10FFFF`. Otherwise, the program might crash!
|
|
*/
|
|
nc_utf8proc_ssize_t nc_utf8proc_normalize_utf32(nc_utf8proc_int32_t *buffer, nc_utf8proc_ssize_t length, nc_utf8proc_option_t options);
|
|
|
|
/**
|
|
* Reencodes the sequence of `length` codepoints pointed to by `buffer`
|
|
* UTF-8 data in-place (i.e., the result is also stored in `buffer`).
|
|
* Can optionally normalize the UTF-32 sequence prior to UTF-8 conversion.
|
|
*
|
|
* @param buffer the (native-endian UTF-32) unicode codepoints to re-encode.
|
|
* @param length the length (in codepoints) of the buffer.
|
|
* @param options a bitwise or (`|`) of one or more of the following flags:
|
|
* - @ref UTF8PROC_NLF2LS - convert LF, CRLF, CR and NEL into LS
|
|
* - @ref UTF8PROC_NLF2PS - convert LF, CRLF, CR and NEL into PS
|
|
* - @ref UTF8PROC_NLF2LF - convert LF, CRLF, CR and NEL into LF
|
|
* - @ref UTF8PROC_STRIPCC - strip or convert all non-affected control characters
|
|
* - @ref UTF8PROC_COMPOSE - try to combine decomposed codepoints into composite
|
|
* codepoints
|
|
* - @ref UTF8PROC_STABLE - prohibit combining characters that would violate
|
|
* the unicode versioning stability
|
|
* - @ref UTF8PROC_CHARBOUND - insert 0xFF bytes before each grapheme cluster
|
|
*
|
|
* @return
|
|
* In case of success, the length (in bytes) of the resulting nul-terminated
|
|
* UTF-8 string is returned; otherwise, a negative error code is returned
|
|
* (nc_utf8proc_errmsg()).
|
|
*
|
|
* @warning The amount of free space pointed to by `buffer` must
|
|
* exceed the amount of the input data by one byte, and the
|
|
* entries of the array pointed to by `str` have to be in the
|
|
* range `0x0000` to `0x10FFFF`. Otherwise, the program might crash!
|
|
*/
|
|
nc_utf8proc_ssize_t nc_utf8proc_reencode(nc_utf8proc_int32_t *buffer, nc_utf8proc_ssize_t length, nc_utf8proc_option_t options);
|
|
|
|
/**
|
|
* Given a pair of consecutive codepoints, return whether a grapheme break is
|
|
* permitted between them (as defined by the extended grapheme clusters in UAX#29).
|
|
*
|
|
* @param codepoint1 The first codepoint.
|
|
* @param codepoint2 The second codepoint, occurring consecutively after `codepoint1`.
|
|
* @param state Beginning with Version 29 (Unicode 9.0.0), this algorithm requires
|
|
* state to break graphemes. This state can be passed in as a pointer
|
|
* in the `state` argument and should initially be set to 0. If the
|
|
* state is not passed in (i.e. a null pointer is passed), UAX#29 rules
|
|
* GB10/12/13 which require this state will not be applied, essentially
|
|
* matching the rules in Unicode 8.0.0.
|
|
*
|
|
* @warning If the state parameter is used, `nc_utf8proc_grapheme_break_stateful` must
|
|
* be called IN ORDER on ALL potential breaks in a string. However, it
|
|
* is safe to reset the state to zero after a grapheme break.
|
|
*/
|
|
nc_utf8proc_bool nc_utf8proc_grapheme_break_stateful(
|
|
nc_utf8proc_int32_t codepoint1, nc_utf8proc_int32_t codepoint2, nc_utf8proc_int32_t *state);
|
|
|
|
/**
|
|
* Same as nc_utf8proc_grapheme_break_stateful(), except without support for the
|
|
* Unicode 9 additions to the algorithm. Supported for legacy reasons.
|
|
*/
|
|
nc_utf8proc_bool nc_utf8proc_grapheme_break(
|
|
nc_utf8proc_int32_t codepoint1, nc_utf8proc_int32_t codepoint2);
|
|
|
|
|
|
/**
|
|
* Given a codepoint `c`, return the codepoint of the corresponding
|
|
* lower-case character, if any; otherwise (if there is no lower-case
|
|
* variant, or if `c` is not a valid codepoint) return `c`.
|
|
*/
|
|
nc_utf8proc_int32_t nc_utf8proc_tolower(nc_utf8proc_int32_t c);
|
|
|
|
/**
|
|
* Given a codepoint `c`, return the codepoint of the corresponding
|
|
* upper-case character, if any; otherwise (if there is no upper-case
|
|
* variant, or if `c` is not a valid codepoint) return `c`.
|
|
*/
|
|
nc_utf8proc_int32_t nc_utf8proc_toupper(nc_utf8proc_int32_t c);
|
|
|
|
/**
|
|
* Given a codepoint `c`, return the codepoint of the corresponding
|
|
* title-case character, if any; otherwise (if there is no title-case
|
|
* variant, or if `c` is not a valid codepoint) return `c`.
|
|
*/
|
|
nc_utf8proc_int32_t nc_utf8proc_totitle(nc_utf8proc_int32_t c);
|
|
|
|
/**
|
|
* Given a codepoint `c`, return `1` if the codepoint corresponds to a lower-case character
|
|
* and `0` otherwise.
|
|
*/
|
|
int nc_utf8proc_islower(nc_utf8proc_int32_t c);
|
|
|
|
/**
|
|
* Given a codepoint `c`, return `1` if the codepoint corresponds to an upper-case character
|
|
* and `0` otherwise.
|
|
*/
|
|
int nc_utf8proc_isupper(nc_utf8proc_int32_t c);
|
|
|
|
/**
|
|
* Given a codepoint, return a character width analogous to `wcwidth(codepoint)`,
|
|
* except that a width of 0 is returned for non-printable codepoints
|
|
* instead of -1 as in `wcwidth`.
|
|
*
|
|
* @note
|
|
* If you want to check for particular types of non-printable characters,
|
|
* (analogous to `isprint` or `iscntrl`), use nc_utf8proc_category(). */
|
|
int nc_utf8proc_charwidth(nc_utf8proc_int32_t codepoint);
|
|
|
|
/**
|
|
* Return the Unicode category for the codepoint (one of the
|
|
* @ref nc_utf8proc_category_t constants.)
|
|
*/
|
|
nc_utf8proc_category_t nc_utf8proc_category(nc_utf8proc_int32_t codepoint);
|
|
|
|
/**
|
|
* Return the two-letter (nul-terminated) Unicode category string for
|
|
* the codepoint (e.g. `"Lu"` or `"Co"`).
|
|
*/
|
|
const char *nc_utf8proc_category_string(nc_utf8proc_int32_t codepoint);
|
|
|
|
/**
|
|
* Maps the given UTF-8 string pointed to by `str` to a new UTF-8
|
|
* string, allocated dynamically by `malloc` and returned via `dstptr`.
|
|
*
|
|
* If the @ref UTF8PROC_NULLTERM flag in the `options` field is set,
|
|
* the length is determined by a NULL terminator, otherwise the
|
|
* parameter `strlen` is evaluated to determine the string length, but
|
|
* in any case the result will be NULL terminated (though it might
|
|
* contain NULL characters with the string if `str` contained NULL
|
|
* characters). Other flags in the `options` field are passed to the
|
|
* functions defined above, and regarded as described. See also
|
|
* nc_utf8proc_map_custom() to supply a custom codepoint transformation.
|
|
*
|
|
* In case of success the length of the new string is returned,
|
|
* otherwise a negative error code is returned.
|
|
*
|
|
* @note The memory of the new UTF-8 string will have been allocated
|
|
* with `malloc`, and should therefore be deallocated with `free`.
|
|
*/
|
|
nc_utf8proc_ssize_t nc_utf8proc_map(
|
|
const nc_utf8proc_uint8_t *str, nc_utf8proc_ssize_t strlen, nc_utf8proc_uint8_t **dstptr, nc_utf8proc_option_t options
|
|
);
|
|
|
|
/**
|
|
* Like nc_utf8proc_map(), but also takes a `custom_func` mapping function
|
|
* that is called on each codepoint in `str` before any other transformations
|
|
* (along with a `custom_data` pointer that is passed through to `custom_func`).
|
|
* The `custom_func` argument is ignored if it is `NULL`.
|
|
*/
|
|
nc_utf8proc_ssize_t nc_utf8proc_map_custom(
|
|
const nc_utf8proc_uint8_t *str, nc_utf8proc_ssize_t strlen, nc_utf8proc_uint8_t **dstptr, nc_utf8proc_option_t options,
|
|
nc_utf8proc_custom_func custom_func, void *custom_data
|
|
);
|
|
|
|
/** @name Unicode normalization
|
|
*
|
|
* Returns a pointer to newly allocated memory of a NFD, NFC, NFKD, NFKC or
|
|
* NFKC_Casefold normalized version of the null-terminated string `str`. These
|
|
* are shortcuts to calling nc_utf8proc_map() with @ref UTF8PROC_NULLTERM
|
|
* combined with @ref UTF8PROC_STABLE and flags indicating the normalization.
|
|
*/
|
|
/** @{ */
|
|
/** NFD normalization (@ref UTF8PROC_DECOMPOSE). */
|
|
nc_utf8proc_uint8_t *nc_utf8proc_NFD(const nc_utf8proc_uint8_t *str);
|
|
/** NFC normalization (@ref UTF8PROC_COMPOSE). */
|
|
nc_utf8proc_uint8_t *nc_utf8proc_NFC(const nc_utf8proc_uint8_t *str);
|
|
/** NFKD normalization (@ref UTF8PROC_DECOMPOSE and @ref UTF8PROC_COMPAT). */
|
|
nc_utf8proc_uint8_t *nc_utf8proc_NFKD(const nc_utf8proc_uint8_t *str);
|
|
/** NFKC normalization (@ref UTF8PROC_COMPOSE and @ref UTF8PROC_COMPAT). */
|
|
nc_utf8proc_uint8_t *nc_utf8proc_NFKC(const nc_utf8proc_uint8_t *str);
|
|
/**
|
|
* NFKC_Casefold normalization (@ref UTF8PROC_COMPOSE and @ref UTF8PROC_COMPAT
|
|
* and @ref UTF8PROC_CASEFOLD and @ref UTF8PROC_IGNORE).
|
|
**/
|
|
nc_utf8proc_uint8_t *nc_utf8proc_NFKC_Casefold(const nc_utf8proc_uint8_t *str);
|
|
/** @} */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|