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comparison: gfx/harfbuzz/src/hb-ot-shape-complex-sea-machine.rl
gfx/harfbuzz/src/hb-ot-shape-complex-sea-machine.rl
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| 1 /* | |
| 2 * Copyright © 2011,2012,2013 Google, Inc. | |
| 3 * | |
| 4 * This is part of HarfBuzz, a text shaping library. | |
| 5 * | |
| 6 * Permission is hereby granted, without written agreement and without | |
| 7 * license or royalty fees, to use, copy, modify, and distribute this | |
| 8 * software and its documentation for any purpose, provided that the | |
| 9 * above copyright notice and the following two paragraphs appear in | |
| 10 * all copies of this software. | |
| 11 * | |
| 12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR | |
| 13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES | |
| 14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN | |
| 15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH | |
| 16 * DAMAGE. | |
| 17 * | |
| 18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, | |
| 19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
| 20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS | |
| 21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO | |
| 22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. | |
| 23 * | |
| 24 * Google Author(s): Behdad Esfahbod | |
| 25 */ | |
| 26 | |
| 27 #ifndef HB_OT_SHAPE_COMPLEX_SEA_MACHINE_HH | |
| 28 #define HB_OT_SHAPE_COMPLEX_SEA_MACHINE_HH | |
| 29 | |
| 30 #include "hb-private.hh" | |
| 31 | |
| 32 %%{ | |
| 33 machine sea_syllable_machine; | |
| 34 alphtype unsigned char; | |
| 35 write data; | |
| 36 }%% | |
| 37 | |
| 38 %%{ | |
| 39 | |
| 40 # Same order as enum sea_category_t. Not sure how to avoid duplication. | |
| 41 C = 1; | |
| 42 GB = 12; # Generic Base | |
| 43 H = 4; # Halant | |
| 44 IV = 2; # Independent Vowel | |
| 45 MR = 22; # Medial Ra | |
| 46 CM = 17; # Consonant Medial | |
| 47 VAbv = 26; | |
| 48 VBlw = 27; | |
| 49 VPre = 28; | |
| 50 VPst = 29; | |
| 51 T = 3; # Tone Marks | |
| 52 A = 10; # Anusvara | |
| 53 | |
| 54 syllable_tail = (VPre|VAbv|VBlw|VPst|H.C|CM|MR|T|A)*; | |
| 55 | |
| 56 consonant_syllable = (C|IV|GB) syllable_tail; | |
| 57 broken_cluster = syllable_tail; | |
| 58 other = any; | |
| 59 | |
| 60 main := |* | |
| 61 consonant_syllable => { found_syllable (consonant_syllable); }; | |
| 62 broken_cluster => { found_syllable (broken_cluster); }; | |
| 63 other => { found_syllable (non_sea_cluster); }; | |
| 64 *|; | |
| 65 | |
| 66 | |
| 67 }%% | |
| 68 | |
| 69 #define found_syllable(syllable_type) \ | |
| 70 HB_STMT_START { \ | |
| 71 if (0) fprintf (stderr, "syllable %d..%d %s\n", last, p+1, #syllable_type); \ | |
| 72 for (unsigned int i = last; i < p+1; i++) \ | |
| 73 info[i].syllable() = (syllable_serial << 4) | syllable_type; \ | |
| 74 last = p+1; \ | |
| 75 syllable_serial++; \ | |
| 76 if (unlikely (syllable_serial == 16)) syllable_serial = 1; \ | |
| 77 } HB_STMT_END | |
| 78 | |
| 79 static void | |
| 80 find_syllables (hb_buffer_t *buffer) | |
| 81 { | |
| 82 unsigned int p, pe, eof, ts HB_UNUSED, te HB_UNUSED, act HB_UNUSED; | |
| 83 int cs; | |
| 84 hb_glyph_info_t *info = buffer->info; | |
| 85 %%{ | |
| 86 write init; | |
| 87 getkey info[p].sea_category(); | |
| 88 }%% | |
| 89 | |
| 90 p = 0; | |
| 91 pe = eof = buffer->len; | |
| 92 | |
| 93 unsigned int last = 0; | |
| 94 unsigned int syllable_serial = 1; | |
| 95 %%{ | |
| 96 write exec; | |
| 97 }%% | |
| 98 } | |
| 99 | |
| 100 #undef found_syllable | |
| 101 | |
| 102 #endif /* HB_OT_SHAPE_COMPLEX_SEA_MACHINE_HH */ |
