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 */ 103