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114 lines
4.2 KiB
C
114 lines
4.2 KiB
C
/*
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* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
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* Copyright (C) 2005-2014, Anthony Minessale II <anthm@freeswitch.org>
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*
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* Version: MPL 1.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
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*
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* The Initial Developer of the Original Code is
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* Seven Du <dujinfang@gmail.com>
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* Portions created by the Initial Developer are Copyright (C)
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Anthony Minessale II <anthm@freeswitch.org>
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*
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*
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* switch_utf8.h UTf8
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*
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*/
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/*
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Basic UTF-8 manipulation routines
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by Jeff Bezanson
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placed in the public domain Fall 2005
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This code is designed to provide the utilities you need to manipulate
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UTF-8 as an internal string encoding. These functions do not perform the
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error checking normally needed when handling UTF-8 data, so if you happen
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to be from the Unicode Consortium you will want to flay me alive.
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I do this because error checking can be performed at the boundaries (I/O),
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with these routines reserved for higher performance on data known to be
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valid.
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*/
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#include <switch.h>
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/* is c the start of a utf8 sequence? */
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#define isutf(c) (((c)&0xC0)!=0x80)
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/* convert UTF-8 data to wide character */
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SWITCH_DECLARE(int) switch_u8_toucs(uint32_t *dest, int sz, char *src, int srcsz);
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/* the opposite conversion */
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SWITCH_DECLARE(int) switch_u8_toutf8(char *dest, int sz, uint32_t *src, int srcsz);
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/* single character to UTF-8 */
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SWITCH_DECLARE(int) switch_u8_wc_toutf8(char *dest, uint32_t ch);
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/* character number to byte offset */
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SWITCH_DECLARE(int) switch_u8_offset(char *str, int charnum);
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/* byte offset to character number */
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SWITCH_DECLARE(int) switch_u8_charnum(char *s, int offset);
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/* return next character, updating an index variable */
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SWITCH_DECLARE(uint32_t) switch_u8_nextchar(char *s, int *i);
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/* move to next character */
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SWITCH_DECLARE(void) switch_u8_inc(char *s, int *i);
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/* move to previous character */
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SWITCH_DECLARE(void) switch_u8_dec(char *s, int *i);
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/* returns length of next utf-8 sequence */
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SWITCH_DECLARE(int) switch_u8_seqlen(char *s);
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/* assuming src points to the character after a backslash, read an
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escape sequence, storing the result in dest and returning the number of
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input characters processed */
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SWITCH_DECLARE(int) switch_u8_read_escape_sequence(char *src, uint32_t *dest);
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/* given a wide character, convert it to an ASCII escape sequence stored in
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buf, where buf is "sz" bytes. returns the number of characters output.*/
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SWITCH_DECLARE(int) switch_u8_escape_wchar(char *buf, int sz, uint32_t ch);
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/* convert a string "src" containing escape sequences to UTF-8 */
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SWITCH_DECLARE(int) switch_u8_unescape(char *buf, int sz, char *src);
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/* convert UTF-8 "src" to ASCII with escape sequences.
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if escape_quotes is nonzero, quote characters will be preceded by
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backslashes as well. */
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SWITCH_DECLARE(int) switch_u8_escape(char *buf, int sz, char *src, int escape_quotes);
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/* utility predicates used by the above */
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SWITCH_DECLARE(int) octal_digit(char c);
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SWITCH_DECLARE(int) hex_digit(char c);
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/* return a pointer to the first occurrence of ch in s, or NULL if not
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found. character index of found character returned in *charn. */
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SWITCH_DECLARE(char *) switch_u8_strchr(char *s, uint32_t ch, int *charn);
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/* same as the above, but searches a buffer of a given size instead of
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a NUL-terminated string. */
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SWITCH_DECLARE(char *) switch_u8_memchr(char *s, uint32_t ch, size_t sz, int *charn);
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/* count the number of characters in a UTF-8 string */
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SWITCH_DECLARE(int) switch_u8_strlen(char *s);
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SWITCH_DECLARE(int) switch_u8_is_locale_utf8(char *locale);
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SWITCH_DECLARE(uint32_t) switch_u8_get_char(char *s, int *i);
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