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Diffstat (limited to 'src/static_libs/liblinebreak/linebreakdef.h')
| -rw-r--r-- | src/static_libs/liblinebreak/linebreakdef.h | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/src/static_libs/liblinebreak/linebreakdef.h b/src/static_libs/liblinebreak/linebreakdef.h new file mode 100644 index 0000000000..bc4eee2e82 --- /dev/null +++ b/src/static_libs/liblinebreak/linebreakdef.h @@ -0,0 +1,149 @@ +/* vim: set tabstop=4 shiftwidth=4: */ + +/* + * Line breaking in a Unicode sequence. Designed to be used in a + * generic text renderer. + * + * Copyright (C) 2008-2010 Wu Yongwei <wuyongwei at gmail dot com> + * + * This software is provided 'as-is', without any express or implied + * warranty. In no event will the author be held liable for any damages + * arising from the use of this software. + * + * Permission is granted to anyone to use this software for any purpose, + * including commercial applications, and to alter it and redistribute + * it freely, subject to the following restrictions: + * + * 1. The origin of this software must not be misrepresented; you must + * not claim that you wrote the original software. If you use this + * software in a product, an acknowledgement in the product + * documentation would be appreciated but is not required. + * 2. Altered source versions must be plainly marked as such, and must + * not be misrepresented as being the original software. + * 3. This notice may not be removed or altered from any source + * distribution. + * + * The main reference is Unicode Standard Annex 14 (UAX #14): + * <URL:http://www.unicode.org/reports/tr14/> + * + * When this library was designed, this annex was at Revision 19, for + * Unicode 5.0.0: + * <URL:http://www.unicode.org/reports/tr14/tr14-19.html> + * + * This library has been updated according to Revision 24, for + * Unicode 5.2.0: + * <URL:http://www.unicode.org/reports/tr14/tr14-24.html> + * + * The Unicode Terms of Use are available at + * <URL:http://www.unicode.org/copyright.html> + */ + +/** + * @file linebreakdef.h + * + * Definitions of internal data structures, declarations of global + * variables, and function prototypes for the line breaking algorithm. + * + * @version 2.0, 2010/01/03 + * @author Wu Yongwei + */ + +/** + * Constant value to mark the end of string. It is not a valid Unicode + * character. + */ +#define EOS 0xFFFF + +/** + * Line break classes. This is a direct mapping of Table 1 of Unicode + * Standard Annex 14, Revision 19. + */ +enum LineBreakClass +{ + /* This is used to signal an error condition. */ + LBP_Undefined, /**< Undefined */ + + /* The following break classes are treated in the pair table. */ + LBP_OP, /**< Opening punctuation */ + LBP_CL, /**< Closing punctuation */ + LBP_CP, /**< Closing parenthesis */ + LBP_QU, /**< Ambiguous quotation */ + LBP_GL, /**< Glue */ + LBP_NS, /**< Non-starters */ + LBP_EX, /**< Exclamation/Interrogation */ + LBP_SY, /**< Symbols allowing break after */ + LBP_IS, /**< Infix separator */ + LBP_PR, /**< Prefix */ + LBP_PO, /**< Postfix */ + LBP_NU, /**< Numeric */ + LBP_AL, /**< Alphabetic */ + LBP_ID, /**< Ideographic */ + LBP_IN, /**< Inseparable characters */ + LBP_HY, /**< Hyphen */ + LBP_BA, /**< Break after */ + LBP_BB, /**< Break before */ + LBP_B2, /**< Break on either side (but not pair) */ + LBP_ZW, /**< Zero-width space */ + LBP_CM, /**< Combining marks */ + LBP_WJ, /**< Word joiner */ + LBP_H2, /**< Hangul LV */ + LBP_H3, /**< Hangul LVT */ + LBP_JL, /**< Hangul L Jamo */ + LBP_JV, /**< Hangul V Jamo */ + LBP_JT, /**< Hangul T Jamo */ + + /* The following break classes are not treated in the pair table */ + LBP_AI, /**< Ambiguous (alphabetic or ideograph) */ + LBP_BK, /**< Break (mandatory) */ + LBP_CB, /**< Contingent break */ + LBP_CR, /**< Carriage return */ + LBP_LF, /**< Line feed */ + LBP_NL, /**< Next line */ + LBP_SA, /**< South-East Asian */ + LBP_SG, /**< Surrogates */ + LBP_SP, /**< Space */ + LBP_XX /**< Unknown */ +}; + +/** + * Struct for entries of line break properties. The array of the + * entries \e must be sorted. + */ +struct LineBreakProperties +{ + utf32_t start; /**< Starting coding point */ + utf32_t end; /**< End coding point */ + enum LineBreakClass prop; /**< The line breaking property */ +}; + +/** + * Struct for association of language-specific line breaking properties + * with language names. + */ +struct LineBreakPropertiesLang +{ + const char *lang; /**< Language name */ + size_t namelen; /**< Length of name to match */ + struct LineBreakProperties *lbp; /**< Pointer to associated data */ +}; + +/** + * Abstract function interface for #lb_get_next_char_utf8, + * #lb_get_next_char_utf16, and #lb_get_next_char_utf32. + */ +typedef utf32_t (*get_next_char_t)(const void *, size_t, size_t *); + +/* Declarations */ +extern struct LineBreakProperties lb_prop_default[]; +extern struct LineBreakPropertiesLang lb_prop_lang_map[]; + +/* Function Prototype */ +utf32_t lb_get_next_char_utf8(const utf8_t *s, size_t len, size_t *ip); +utf32_t lb_get_next_char_utf16(const utf16_t *s, size_t len, size_t *ip); +utf32_t lb_get_next_char_utf32(const utf32_t *s, size_t len, size_t *ip); +void set_linebreaks( + const void *s, + size_t len, + const char *lang, + char *brks, + get_next_char_t get_next_char); |