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Diffstat (limited to 'utf8proc.h')
| -rw-r--r-- | utf8proc.h | 385 |
1 files changed, 385 insertions, 0 deletions
diff --git a/utf8proc.h b/utf8proc.h new file mode 100644 index 0000000..24a891b --- /dev/null +++ b/utf8proc.h @@ -0,0 +1,385 @@ +/* + * Copyright (c) 2009 Public Software Group e. V., Berlin, Germany + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + + +/* + * File name: utf8proc.h + * + * Description: + * Header files for libutf8proc, which is a mapping tool for UTF-8 strings + * with following features: + * - decomposing and composing of strings + * - replacing compatibility characters with their equivalents + * - stripping of "default ignorable characters" + * like SOFT-HYPHEN or ZERO-WIDTH-SPACE + * - folding of certain characters for string comparison + * (e.g. HYPHEN U+2010 and MINUS U+2212 to ASCII "-") + * (see "LUMP" option) + * - optional rejection of strings containing non-assigned code points + * - stripping of control characters + * - stripping of character marks (accents, etc.) + * - transformation of LF, CRLF, CR and NEL to line-feed (LF) + * or to the unicode chararacters for paragraph separation (PS) + * or line separation (LS). + * - unicode case folding (for case insensitive string comparisons) + * - rejection of illegal UTF-8 data + * (i.e. UTF-8 encoded UTF-16 surrogates) + * - support for korean hangul characters + * Unicode Version 5.0.0 is supported. + */ + + +#ifndef UTF8PROC_H +#define UTF8PROC_H + + +#include <stdlib.h> +#include <sys/types.h> +#ifdef _MSC_VER +typedef signed char int8_t; +typedef unsigned char uint8_t; +typedef short int16_t; +typedef unsigned short uint16_t; +typedef int int32_t; +#ifdef _WIN64 +#define ssize_t __int64 +#else +#define ssize_t int +#endif +typedef unsigned char bool; +enum {false, true}; +#else +#include <stdbool.h> +#include <inttypes.h> +#endif +#include <limits.h> + +#ifdef __cplusplus +extern "C" { +#endif + +#ifndef SSIZE_MAX +#define SSIZE_MAX ((size_t)SIZE_MAX/2) +#endif + +#define UTF8PROC_NULLTERM (1<<0) +#define UTF8PROC_STABLE (1<<1) +#define UTF8PROC_COMPAT (1<<2) +#define UTF8PROC_COMPOSE (1<<3) +#define UTF8PROC_DECOMPOSE (1<<4) +#define UTF8PROC_IGNORE (1<<5) +#define UTF8PROC_REJECTNA (1<<6) +#define UTF8PROC_NLF2LS (1<<7) +#define UTF8PROC_NLF2PS (1<<8) +#define UTF8PROC_NLF2LF (UTF8PROC_NLF2LS | UTF8PROC_NLF2PS) +#define UTF8PROC_STRIPCC (1<<9) +#define UTF8PROC_CASEFOLD (1<<10) +#define UTF8PROC_CHARBOUND (1<<11) +#define UTF8PROC_LUMP (1<<12) +#define UTF8PROC_STRIPMARK (1<<13) +/* + * Flags being regarded by several functions in the library: + * NULLTERM: The given UTF-8 input is NULL terminated. + * STABLE: Unicode Versioning Stability has to be respected. + * COMPAT: Compatiblity decomposition + * (i.e. formatting information is lost) + * COMPOSE: Return a result with composed characters. + * DECOMPOSE: Return a result with decomposed characters. + * IGNORE: Strip "default ignorable characters" + * REJECTNA: Return an error, if the input contains unassigned + * code points. + * NLF2LS: Indicating that NLF-sequences (LF, CRLF, CR, NEL) are + * representing a line break, and should be converted to the + * unicode character for line separation (LS). + * NLF2PS: Indicating that NLF-sequences are representing a paragraph + * break, and should be converted to the unicode character for + * paragraph separation (PS). + * NLF2LF: Indicating that the meaning of NLF-sequences is unknown. + * STRIPCC: Strips and/or convers control characters. + * NLF-sequences are transformed into space, except if one of + * the NLF2LS/PS/LF options is given. + * HorizontalTab (HT) and FormFeed (FF) are treated as a + * NLF-sequence in this case. + * All other control characters are simply removed. + * CASEFOLD: Performs unicode case folding, to be able to do a + * case-insensitive string comparison. + * CHARBOUND: Inserts 0xFF bytes at the beginning of each sequence which + * is representing a single grapheme cluster (see UAX#29). + * LUMP: Lumps certain characters together + * (e.g. HYPHEN U+2010 and MINUS U+2212 to ASCII "-"). + * (See lump.txt for details.) + * If NLF2LF is set, this includes a transformation of + * paragraph and line separators to ASCII line-feed (LF). + * STRIPMARK: Strips all character markings + * (non-spacing, spacing and enclosing) (i.e. accents) + * NOTE: this option works only with COMPOSE or DECOMPOSE + */ + +#define UTF8PROC_ERROR_NOMEM -1 +#define UTF8PROC_ERROR_OVERFLOW -2 +#define UTF8PROC_ERROR_INVALIDUTF8 -3 +#define UTF8PROC_ERROR_NOTASSIGNED -4 +#define UTF8PROC_ERROR_INVALIDOPTS -5 +/* + * Error codes being returned by almost all functions: + * ERROR_NOMEM: Memory could not be allocated. + * ERROR_OVERFLOW: The given string is too long to be processed. + * ERROR_INVALIDUTF8: The given string is not a legal UTF-8 string. + * ERROR_NOTASSIGNED: The REJECTNA flag was set, + * and an unassigned code point was found. + * ERROR_INVALIDOPTS: Invalid options have been used. + */ + +typedef int16_t utf8proc_propval_t; +typedef struct utf8proc_property_struct { + utf8proc_propval_t category; + utf8proc_propval_t combining_class; + utf8proc_propval_t bidi_class; + utf8proc_propval_t decomp_type; + const int32_t *decomp_mapping; + unsigned bidi_mirrored:1; + int32_t uppercase_mapping; + int32_t lowercase_mapping; + int32_t titlecase_mapping; + int32_t comb1st_index; + int32_t comb2nd_index; + unsigned comp_exclusion:1; + unsigned ignorable:1; + unsigned control_boundary:1; + unsigned extend:1; + const int32_t *casefold_mapping; +} utf8proc_property_t; + +#define UTF8PROC_CATEGORY_LU 1 +#define UTF8PROC_CATEGORY_LL 2 +#define UTF8PROC_CATEGORY_LT 3 +#define UTF8PROC_CATEGORY_LM 4 +#define UTF8PROC_CATEGORY_LO 5 +#define UTF8PROC_CATEGORY_MN 6 +#define UTF8PROC_CATEGORY_MC 7 +#define UTF8PROC_CATEGORY_ME 8 +#define UTF8PROC_CATEGORY_ND 9 +#define UTF8PROC_CATEGORY_NL 10 +#define UTF8PROC_CATEGORY_NO 11 +#define UTF8PROC_CATEGORY_PC 12 +#define UTF8PROC_CATEGORY_PD 13 +#define UTF8PROC_CATEGORY_PS 14 +#define UTF8PROC_CATEGORY_PE 15 +#define UTF8PROC_CATEGORY_PI 16 +#define UTF8PROC_CATEGORY_PF 17 +#define UTF8PROC_CATEGORY_PO 18 +#define UTF8PROC_CATEGORY_SM 19 +#define UTF8PROC_CATEGORY_SC 20 +#define UTF8PROC_CATEGORY_SK 21 +#define UTF8PROC_CATEGORY_SO 22 +#define UTF8PROC_CATEGORY_ZS 23 +#define UTF8PROC_CATEGORY_ZL 24 +#define UTF8PROC_CATEGORY_ZP 25 +#define UTF8PROC_CATEGORY_CC 26 +#define UTF8PROC_CATEGORY_CF 27 +#define UTF8PROC_CATEGORY_CS 28 +#define UTF8PROC_CATEGORY_CO 29 +#define UTF8PROC_CATEGORY_CN 30 +#define UTF8PROC_BIDI_CLASS_L 1 +#define UTF8PROC_BIDI_CLASS_LRE 2 +#define UTF8PROC_BIDI_CLASS_LRO 3 +#define UTF8PROC_BIDI_CLASS_R 4 +#define UTF8PROC_BIDI_CLASS_AL 5 +#define UTF8PROC_BIDI_CLASS_RLE 6 +#define UTF8PROC_BIDI_CLASS_RLO 7 +#define UTF8PROC_BIDI_CLASS_PDF 8 +#define UTF8PROC_BIDI_CLASS_EN 9 +#define UTF8PROC_BIDI_CLASS_ES 10 +#define UTF8PROC_BIDI_CLASS_ET 11 +#define UTF8PROC_BIDI_CLASS_AN 12 +#define UTF8PROC_BIDI_CLASS_CS 13 +#define UTF8PROC_BIDI_CLASS_NSM 14 +#define UTF8PROC_BIDI_CLASS_BN 15 +#define UTF8PROC_BIDI_CLASS_B 16 +#define UTF8PROC_BIDI_CLASS_S 17 +#define UTF8PROC_BIDI_CLASS_WS 18 +#define UTF8PROC_BIDI_CLASS_ON 19 +#define UTF8PROC_DECOMP_TYPE_FONT 1 +#define UTF8PROC_DECOMP_TYPE_NOBREAK 2 +#define UTF8PROC_DECOMP_TYPE_INITIAL 3 +#define UTF8PROC_DECOMP_TYPE_MEDIAL 4 +#define UTF8PROC_DECOMP_TYPE_FINAL 5 +#define UTF8PROC_DECOMP_TYPE_ISOLATED 6 +#define UTF8PROC_DECOMP_TYPE_CIRCLE 7 +#define UTF8PROC_DECOMP_TYPE_SUPER 8 +#define UTF8PROC_DECOMP_TYPE_SUB 9 +#define UTF8PROC_DECOMP_TYPE_VERTICAL 10 +#define UTF8PROC_DECOMP_TYPE_WIDE 11 +#define UTF8PROC_DECOMP_TYPE_NARROW 12 +#define UTF8PROC_DECOMP_TYPE_SMALL 13 +#define UTF8PROC_DECOMP_TYPE_SQUARE 14 +#define UTF8PROC_DECOMP_TYPE_FRACTION 15 +#define UTF8PROC_DECOMP_TYPE_COMPAT 16 + +extern const int8_t utf8proc_utf8class[256]; + +const char *utf8proc_version(void); + +const char *utf8proc_errmsg(ssize_t errcode); +/* + * Returns a static error string for the given error code. + */ + +ssize_t utf8proc_iterate(const uint8_t *str, ssize_t strlen, int32_t *dst); +/* + * Reads a single char from the UTF-8 sequence being pointed to by 'str'. + * The maximum number of bytes read is 'strlen', unless 'strlen' is + * negative. + * If a valid unicode char could be read, it is stored in the variable + * being pointed to by 'dst', 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. + */ + +bool utf8proc_codepoint_valid(int32_t uc); +/* + * Returns 1, if the given unicode code-point is valid, otherwise 0. + */ + +ssize_t utf8proc_encode_char(int32_t uc, uint8_t *dst); +/* + * Encodes the unicode char with the code point 'uc' as an UTF-8 string in + * the byte array being pointed to by 'dst'. This array has to be at least + * 4 bytes long. + * In case of success the number of bytes written is returned, + * otherwise 0. + * This function does not check if 'uc' is a valid unicode code point. + */ + +const utf8proc_property_t *utf8proc_get_property(int32_t uc); +/* + * Returns a pointer to a (constant) struct containing information about + * the unicode char with the given code point 'uc'. + * If the character is not existent a pointer to a special struct is + * returned, where 'category' is a NULL pointer. + * WARNING: The parameter 'uc' has to be in the range of 0x0000 to + * 0x10FFFF, otherwise the program might crash! + */ + +ssize_t utf8proc_decompose_char( + int32_t uc, int32_t *dst, ssize_t bufsize, + int options, int *last_boundclass +); +/* + * Writes a decomposition of the unicode char 'uc' into the array being + * pointed to by 'dst'. + * Following flags in the 'options' field are regarded: + * REJECTNA: an unassigned unicode code point leads to an error + * IGNORE: "default ignorable" chars are stripped + * CASEFOLD: unicode casefolding is applied + * COMPAT: replace certain characters with their + * compatibility decomposition + * CHARBOUND: Inserts 0xFF bytes before each grapheme cluster + * LUMP: lumps certain different characters together + * STRIPMARK: removes all character marks + * The pointer 'last_boundclass' has to point to an integer variable which + * is storing the last character boundary class, if the CHARBOUND option + * is used. + * In case of success the number of chars written is returned, + * in case of an error, a negative error code is returned. + * If the number of written chars would be bigger than 'bufsize', + * the buffer (up to 'bufsize') has inpredictable data, and the needed + * buffer size is returned. + * WARNING: The parameter 'uc' has to be in the range of 0x0000 to + * 0x10FFFF, otherwise the program might crash! + */ + +ssize_t utf8proc_decompose( + const uint8_t *str, ssize_t strlen, + int32_t *buffer, ssize_t bufsize, int options +); +/* + * Does the same as 'utf8proc_decompose_char', but acts on a whole UTF-8 + * string, and orders the decomposed sequences correctly. + * If the NULLTERM flag in 'options' is set, processing will be stopped, + * when a NULL byte is encounted, otherwise 'strlen' bytes are processed. + * The result in form of unicode code points is written into the buffer + * being pointed to by 'buffer', having the length of 'bufsize' entries. + * In case of success the number of chars written is returned, + * in case of an error, a negative error code is returned. + * If the number of written chars would be bigger than 'bufsize', + * the buffer (up to 'bufsize') has inpredictable data, and the needed + * buffer size is returned. + */ + +ssize_t utf8proc_reencode(int32_t *buffer, ssize_t length, int options); +/* + * Reencodes the sequence of unicode characters given by the pointer + * 'buffer' and 'length' as UTF-8. + * The result is stored in the same memory area where the data is read. + * Following flags in the 'options' field are regarded: + * NLF2LS: converts LF, CRLF, CR and NEL into LS + * NLF2PS: converts LF, CRLF, CR and NEL into PS + * NLF2LF: converts LF, CRLF, CR and NEL into LF + * STRIPCC: strips or converts all non-affected control characters + * COMPOSE: tries to combine decomposed characters into composite + * characters + * STABLE: prohibits combining characters which would violate + * the unicode versioning stability + * In case of success the length of the resulting UTF-8 string is + * returned, otherwise a negative error code is returned. + * WARNING: The amount of free space being pointed to by 'buffer', has to + * 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 of 0x0000 to 0x10FFFF, otherwise the program might + * crash! + */ + +ssize_t utf8proc_map( + const uint8_t *str, ssize_t strlen, uint8_t **dstptr, int options +); +/* + * Maps the given UTF-8 string being pointed to by 'str' to a new UTF-8 + * string, which is allocated dynamically, and afterwards pointed to by + * the pointer being pointed to by 'dstptr'. + * If the 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 + * before). Other flags in the 'options' field are passed to the functions + * defined above, and regarded as described. + * In case of success the length of the new string is returned, + * otherwise a negative error code is returned. + * NOTICE: The memory of the new UTF-8 string will have been allocated with + * 'malloc', and has theirfore to be freed with 'free'. + */ + +uint8_t *utf8proc_NFD(const uint8_t *str); +uint8_t *utf8proc_NFC(const uint8_t *str); +uint8_t *utf8proc_NFKD(const uint8_t *str); +uint8_t *utf8proc_NFKC(const uint8_t *str); +/* + * Returns a pointer to newly allocated memory of a NFD, NFC, NFKD or NFKC + * normalized version of the null-terminated string 'str'. + */ + +#ifdef __cplusplus +} +#endif + +#endif + |