88 lines
2.8 KiB
C
88 lines
2.8 KiB
C
/* vim: set tabstop=4 shiftwidth=4: */
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/*
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* Line breaking in a Unicode sequence. Designed to be used in a
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* generic text renderer.
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*
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* Copyright (C) 2008-2010 Wu Yongwei <wuyongwei at gmail dot com>
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the author be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute
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* it freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must
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* not claim that you wrote the original software. If you use this
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* software in a product, an acknowledgement in the product
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* documentation would be appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must
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* not be misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source
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* distribution.
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*
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* The main reference is Unicode Standard Annex 14 (UAX #14):
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* <URL:http://www.unicode.org/reports/tr14/>
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*
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* When this library was designed, this annex was at Revision 19, for
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* Unicode 5.0.0:
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* <URL:http://www.unicode.org/reports/tr14/tr14-19.html>
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*
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* This library has been updated according to Revision 24, for
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* Unicode 5.2.0:
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* <URL:http://www.unicode.org/reports/tr14/tr14-24.html>
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*
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* The Unicode Terms of Use are available at
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* <URL:http://www.unicode.org/copyright.html>
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*/
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/**
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* @file linebreak.h
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*
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* Header file for the line breaking algorithm.
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*
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* @version 2.0, 2010/01/03
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* @author Wu Yongwei
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*/
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#ifndef LINEBREAK_H
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#define LINEBREAK_H
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#include <stddef.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define LINEBREAK_VERSION 0x0200 /**< Version of the library linebreak */
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extern const int linebreak_version;
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#ifndef LINEBREAK_UTF_TYPES_DEFINED
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#define LINEBREAK_UTF_TYPES_DEFINED
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typedef unsigned char utf8_t; /**< Type for UTF-8 data points */
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typedef unsigned short utf16_t; /**< Type for UTF-16 data points */
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typedef unsigned int utf32_t; /**< Type for UTF-32 data points */
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#endif
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#define LINEBREAK_MUSTBREAK 0 /**< Break is mandatory */
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#define LINEBREAK_ALLOWBREAK 1 /**< Break is allowed */
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#define LINEBREAK_NOBREAK 2 /**< No break is possible */
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#define LINEBREAK_INSIDEACHAR 3 /**< A UTF-8/16 sequence is unfinished */
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void init_linebreak(void);
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void set_linebreaks_utf8(
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const utf8_t *s, size_t len, const char* lang, char *brks);
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void set_linebreaks_utf16(
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const utf16_t *s, size_t len, const char* lang, char *brks);
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void set_linebreaks_utf32(
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const utf32_t *s, size_t len, const char* lang, char *brks);
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int is_line_breakable(utf32_t char1, utf32_t char2, const char* lang);
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#ifdef __cplusplus
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}
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#endif
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#endif /* LINEBREAK_H */
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