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UNICODE_GRAPHEME_BRE(3) Courier Unicode Library UNICODE_GRAPHEME_BRE(3) NAME unicode_grapheme_break, unicode_grapheme_break_init, uni- code_grapheme_break_next, unicode_grapheme_break_deinit - unicode grapheme cluster boundary rules SYNOPSIS #include <courier-unicode.h> unicode_grapheme_break_info_t unicode_grapheme_break_init(void); int unicode_grapheme_next(unicode_grapheme_break_info_t handle, char32_t c); void unicode_grapheme_deinit(unicode_grapheme_break_info_t handle); int unicode_grapheme_break(char32_t a, char32_t b); DESCRIPTION These functions implement the unicode grapheme cluster breaking algorithm. Invoke unicode_grapheme_break_init() to initialize the grapheme cluster breaking algorithm. unicode_grapheme_break_init() returns an opaque han- dle. Each subsequent call to unicode_grapheme_break_next() passes this han- dle, and the next character. unicode_grapheme_break_next() returns a non-0 value if there's a grapheme break before the character, in a sequence of Unicode characters. unicode_grapheme_break_deinit() releases all resources used by the grapheme breaking handle, and the unicode_grapheme_break_info_t handle is no longer valid after this call. The first call to unicode_grapheme_break_next() always returns non-0, as per the GB1 rule. unicode_grapheme_break() is a simplified interface that returns non-zero if there is a grapheme break between two unicode characters a and b. This is is equivalent to calling unicode_grapheme_break_init(), followed by two calls to unicode_grapheme_break_next(), and finally uni- code_grapheme_break_deinit(), then returning the result of the second call to unicode_grapheme_break_next(). SEE ALSO TR-29[1], courier-unicode(7), unicode_convert_tocase(3), uni- code_line_break(3), unicode_word_break(3). AUTHOR Sam Varshavchik Author NOTES 1. TR-29 https://www.unicode.org/reports/tr29/tr29-47.html Courier Unicode Library 04/12/2026 UNICODE_GRAPHEME_BRE(3)
NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | AUTHOR | NOTES
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