2 * Copyright © 2011,2012 Google, Inc.
4 * This is part of HarfBuzz, a text shaping library.
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.
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
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.
24 * Google Author(s): Behdad Esfahbod
27 #ifndef HB_OT_SHAPE_COMPLEX_INDIC_MACHINE_HH
28 #define HB_OT_SHAPE_COMPLEX_INDIC_MACHINE_HH
30 #include "hb-private.hh"
33 machine indic_syllable_machine;
34 alphtype unsigned char;
40 # Same order as enum indic_category_t. Not sure how to avoid duplication.
59 c = (C | Ra); # is_consonant
60 n = ((ZWNJ?.RS)? (N.N?)?); # is_consonant_modifier
61 z = ZWJ|ZWNJ; # is_joiner
62 h = H | Coeng; # is_halant_or_coeng
63 reph = (Ra H | Repha); # possible reph
66 forced_rakar = ZWJ H ZWJ Ra;
67 matra_group = z{0,3}.M.N?.(H | forced_rakar)?;
68 syllable_tail = (SM.ZWNJ?)? (Coeng (cn|V))? (VD VD?)?;
69 place_holder = NBSP | DOTTEDCIRCLE;
70 halant_group = (z?.h.ZWJ?);
71 final_halant_group = halant_group | h.ZWNJ;
72 halant_or_matra_group = (final_halant_group | matra_group{0,4});
75 consonant_syllable = Repha? (cn.halant_group){0,4} cn A? halant_or_matra_group? syllable_tail;
76 vowel_syllable = reph? V.n? (ZWJ | (halant_group.cn){0,4} halant_or_matra_group? syllable_tail);
77 standalone_cluster = reph? place_holder.n? (halant_group.cn){0,4} halant_or_matra_group? syllable_tail;
81 consonant_syllable => { process_syllable (consonant_syllable); };
82 vowel_syllable => { process_syllable (vowel_syllable); };
83 standalone_cluster => { process_syllable (standalone_cluster); };
84 other => { process_syllable (non_indic); };
90 #define process_syllable(func) \
92 if (0) fprintf (stderr, "syllable %d..%d %s\n", last, p+1, #func); \
93 for (unsigned int i = last; i < p+1; i++) \
94 info[i].syllable() = syllable_serial; \
95 PASTE (initial_reordering_, func) (plan, buffer, last, p+1); \
98 if (unlikely (!syllable_serial)) syllable_serial++; \
102 find_syllables (const hb_ot_shape_plan_t *plan, hb_buffer_t *buffer)
104 unsigned int p, pe, eof, ts, te, act;
106 hb_glyph_info_t *info = buffer->info;
109 getkey info[p].indic_category();
113 pe = eof = buffer->len;
115 unsigned int last = 0;
116 uint8_t syllable_serial = 1;
122 #endif /* HB_OT_SHAPE_COMPLEX_INDIC_MACHINE_HH */