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; 60 61c = (C | Ra); # is_consonant 62n = ((ZWNJ?.RS)? (N.N?)?); # is_consonant_modifier 63z = ZWJ|ZWNJ; # is_joiner 64h = H | Coeng; # is_halant_or_coeng 65reph = (Ra H | Repha); # possible reph 66 67cn = c.ZWJ?.n?; 68forced_rakar = ZWJ H ZWJ Ra; 69symbol = Symbol.N?; 70matra_group = z{0,3}.M.N?.(H | forced_rakar)?; 71syllable_tail = (z?.SM.SM?.ZWNJ?)? A{0,3}? VD{0,2}; 72place_holder = PLACEHOLDER | DOTTEDCIRCLE; 73halant_group = (z?.h.(ZWJ.N?)?); 74final_halant_group = halant_group | h.ZWNJ; 75medial_group = CM?; 76halant_or_matra_group = (final_halant_group | (h.ZWJ)? matra_group{0,4}) (Coeng (cn|V))?; 77 78 79consonant_syllable = Repha? (cn.halant_group){0,4} cn medial_group halant_or_matra_group syllable_tail; 80vowel_syllable = reph? V.n? (ZWJ | (halant_group.cn){0,4} medial_group halant_or_matra_group syllable_tail); 81standalone_cluster = (Repha? PLACEHOLDER | reph? DOTTEDCIRCLE).n? (halant_group.cn){0,4} medial_group halant_or_matra_group syllable_tail; 82symbol_cluster = symbol syllable_tail; 83broken_cluster = reph? n? (halant_group.cn){0,4} medial_group halant_or_matra_group syllable_tail; 84other = any; 85 86main := |* 87 consonant_syllable => { found_syllable (consonant_syllable); }; 88 vowel_syllable => { found_syllable (vowel_syllable); }; 89 standalone_cluster => { found_syllable (standalone_cluster); }; 90 symbol_cluster => { found_syllable (symbol_cluster); }; 91 broken_cluster => { found_syllable (broken_cluster); }; 92 other => { found_syllable (non_indic_cluster); }; 93*|; 94 95 96}%% 97 98#define found_syllable(syllable_type) \ 99 HB_STMT_START { \ 100 if (0) fprintf (stderr, "syllable %d..%d %s\n", last, p+1, #syllable_type); \ 101 for (unsigned int i = last; i < p+1; i++) \ 102 info[i].syllable() = (syllable_serial << 4) | syllable_type; \ 103 last = p+1; \ 104 syllable_serial++; \ 105 if (unlikely (syllable_serial == 16)) syllable_serial = 1; \ 106 } HB_STMT_END 107 108static void 109find_syllables (hb_buffer_t *buffer) 110{ 111 unsigned int p, pe, eof, ts HB_UNUSED, te HB_UNUSED, act HB_UNUSED; 112 int cs; 113 hb_glyph_info_t *info = buffer->info; 114 %%{ 115 write init; 116 getkey info[p].indic_category(); 117 }%% 118 119 p = 0; 120 pe = eof = buffer->len; 121 122 unsigned int last = 0; 123 unsigned int syllable_serial = 1; 124 %%{ 125 write exec; 126 }%% 127} 128 129#endif /* HB_OT_SHAPE_COMPLEX_INDIC_MACHINE_HH */ 130