1/* 2 * Copyright © 2011,2012 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_INDIC_MACHINE_HH 28#define HB_OT_SHAPE_COMPLEX_INDIC_MACHINE_HH 29 30#include "hb-private.hh" 31 32%%{ 33 machine indic_syllable_machine; 34 alphtype unsigned char; 35 write data; 36}%% 37 38%%{ 39 40# Same order as enum indic_category_t. Not sure how to avoid duplication. 41X = 0; 42C = 1; 43V = 2; 44N = 3; 45H = 4; 46ZWNJ = 5; 47ZWJ = 6; 48M = 7; 49SM = 8; 50VD = 9; 51A = 10; 52PLACEHOLDER = 11; 53DOTTEDCIRCLE = 12; 54RS = 13; 55Coeng = 14; 56Repha = 15; 57Ra = 16; 58CM = 17; 59Symbol= 18; 60CM2 = 31; 61 62c = (C | Ra); # is_consonant 63n = ((ZWNJ?.RS)? (N.N?)?); # is_consonant_modifier 64z = ZWJ|ZWNJ; # is_joiner 65h = H | Coeng; # is_halant_or_coeng 66reph = (Ra H | Repha); # possible reph 67 68cn = c.ZWJ?.n?; 69forced_rakar = ZWJ H ZWJ Ra; 70symbol = Symbol.N?; 71matra_group = z{0,3}.M.N?.(H | forced_rakar)?; 72syllable_tail = (z?.SM.SM?.ZWNJ?)? A{0,3}? VD{0,2}; 73place_holder = PLACEHOLDER | DOTTEDCIRCLE; 74halant_group = (z?.h.(ZWJ.N?)?); 75final_halant_group = halant_group | h.ZWNJ; 76medial_group = CM?.CM2?; 77halant_or_matra_group = (final_halant_group | (h.ZWJ)? matra_group{0,4}) (Coeng (cn|V))?; 78 79 80consonant_syllable = Repha? (cn.halant_group){0,4} cn medial_group halant_or_matra_group syllable_tail; 81vowel_syllable = reph? V.n? (ZWJ | (halant_group.cn){0,4} medial_group halant_or_matra_group syllable_tail); 82standalone_cluster = (Repha? PLACEHOLDER | reph? DOTTEDCIRCLE).n? (halant_group.cn){0,4} medial_group halant_or_matra_group syllable_tail; 83symbol_cluster = symbol syllable_tail; 84broken_cluster = reph? n? (halant_group.cn){0,4} medial_group halant_or_matra_group syllable_tail; 85other = any; 86 87main := |* 88 consonant_syllable => { found_syllable (consonant_syllable); }; 89 vowel_syllable => { found_syllable (vowel_syllable); }; 90 standalone_cluster => { found_syllable (standalone_cluster); }; 91 symbol_cluster => { found_syllable (symbol_cluster); }; 92 broken_cluster => { found_syllable (broken_cluster); }; 93 other => { found_syllable (non_indic_cluster); }; 94*|; 95 96 97}%% 98 99#define found_syllable(syllable_type) \ 100 HB_STMT_START { \ 101 if (0) fprintf (stderr, "syllable %d..%d %s\n", last, p+1, #syllable_type); \ 102 for (unsigned int i = last; i < p+1; i++) \ 103 info[i].syllable() = (syllable_serial << 4) | syllable_type; \ 104 last = p+1; \ 105 syllable_serial++; \ 106 if (unlikely (syllable_serial == 16)) syllable_serial = 1; \ 107 } HB_STMT_END 108 109static void 110find_syllables (hb_buffer_t *buffer) 111{ 112 unsigned int p, pe, eof, ts HB_UNUSED, te HB_UNUSED, act HB_UNUSED; 113 int cs; 114 hb_glyph_info_t *info = buffer->info; 115 %%{ 116 write init; 117 getkey info[p].indic_category(); 118 }%% 119 120 p = 0; 121 pe = eof = buffer->len; 122 123 unsigned int last = 0; 124 unsigned int syllable_serial = 1; 125 %%{ 126 write exec; 127 }%% 128} 129 130#endif /* HB_OT_SHAPE_COMPLEX_INDIC_MACHINE_HH */ 131