97 lines
3.6 KiB
C
97 lines
3.6 KiB
C
/*
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* Unicode joining algorithms for QEmacs.
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*
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* Copyright (c) 2000 Fabrice Bellard.
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* Copyright (c) 2000-2024 Charlie Gordon.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef UNICODE_JOIN_H
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#define UNICODE_JOIN_H
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int load_ligatures(const char *filename);
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void unload_ligatures(void);
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int combine_accent(char32_t *buf, char32_t c, char32_t accent);
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int expand_ligature(char32_t *buf, char32_t c);
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int unicode_to_glyphs(char32_t *dst, unsigned int *char_to_glyph_pos,
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int dst_size, char32_t *src, int src_size,
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int reverse);
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char32_t get_mirror_char(char32_t c);
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// XXX: should rewrite this part
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typedef enum {
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BIDIR_TYPE_LTR, /* Strong Left-to-Right */
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BIDIR_TYPE_RTL, /* Right-to-left characters */
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BIDIR_TYPE_WL, /* Weak left to right */
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BIDIR_TYPE_WR, /* Weak right to left */
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BIDIR_TYPE_EN, /* European Numeral */
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BIDIR_TYPE_ES, /* European number Separator */
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BIDIR_TYPE_ET, /* European number Terminator */
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BIDIR_TYPE_AN, /* Arabic Numeral */
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BIDIR_TYPE_CS, /* Common Separator */
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BIDIR_TYPE_BS, /* Block Separator */
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BIDIR_TYPE_SS, /* Segment Separator */
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BIDIR_TYPE_WS, /* Whitespace */
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BIDIR_TYPE_AL, /* Arabic Letter */
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BIDIR_TYPE_NSM, /* Non Spacing Mark */
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BIDIR_TYPE_BN, /* Boundary Neutral */
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BIDIR_TYPE_ON, /* Other Neutral */
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BIDIR_TYPE_LRE, /* Left-to-Right Embedding */
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BIDIR_TYPE_RLE, /* Right-to-Left Embedding */
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BIDIR_TYPE_PDF, /* Pop Directional Flag */
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BIDIR_TYPE_LRO, /* Left-to-Right Override */
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BIDIR_TYPE_RLO, /* Right-to-Left Override */
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/* The following are only used internally */
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BIDIR_TYPE_SOT,
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BIDIR_TYPE_EOT,
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BIDIR_TYPE_N,
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BIDIR_TYPE_E,
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BIDIR_TYPE_CTL, /* Control units */
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BIDIR_TYPE_EO, /* Control units */
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BIDIR_TYPE_DEL, /* type record is to be deleted */
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BIDIR_TYPE_L = BIDIR_TYPE_LTR,
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BIDIR_TYPE_R = BIDIR_TYPE_RTL,
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BIDIR_TYPE_CM = BIDIR_TYPE_ON + 2,
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} BidirCharType;
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typedef struct BidirTypeLink {
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BidirCharType type;
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int pos;
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int len;
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int level;
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} BidirTypeLink;
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BidirCharType bidir_get_type(char32_t ch);
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BidirCharType bidir_get_type_test(char32_t ch);
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void bidir_analyze_string(BidirTypeLink *type_rl_list,
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BidirCharType *pbase_dir,
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int *pmax_level);
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/* arabic.c */
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int arabic_join(char32_t *line, unsigned int *ctog, int len);
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/* indic.c */
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int devanagari_log2vis(char32_t *str, unsigned int *ctog, int len);
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#endif /* UNICODE_JOIN_H */
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