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.
61 c = (C | Ra); # is_consonant
62 n = ((ZWNJ?.RS)? (N.N?)?); # is_consonant_modifier
63 z = ZWJ|ZWNJ; # is_joiner
64 h = H | Coeng; # is_halant_or_coeng
65 reph = (Ra H | Repha); # possible reph
68 forced_rakar = ZWJ H ZWJ Ra;
70 matra_group = z{0,3}.M.N?.(H | forced_rakar)?;
71 syllable_tail = (z?.SM.SM?.ZWNJ?)? A{0,3}? VD{0,2};
72 place_holder = PLACEHOLDER | DOTTEDCIRCLE;
73 halant_group = (z?.h.(ZWJ.N?)?);
74 final_halant_group = halant_group | h.ZWNJ;
76 halant_or_matra_group = (final_halant_group | (h.ZWJ)? matra_group{0,4}) (Coeng (cn|V))?;
79 consonant_syllable = Repha? (cn.halant_group){0,4} cn medial_group halant_or_matra_group syllable_tail;
80 vowel_syllable = reph? V.n? (ZWJ | (halant_group.cn){0,4} medial_group halant_or_matra_group syllable_tail);
81 standalone_cluster = (Repha? PLACEHOLDER | reph? DOTTEDCIRCLE).n? (halant_group.cn){0,4} medial_group halant_or_matra_group syllable_tail;
82 symbol_cluster = symbol syllable_tail;
83 broken_cluster = reph? n? (halant_group.cn){0,4} medial_group halant_or_matra_group syllable_tail;
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); };
98 #define found_syllable(syllable_type) \
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; \
105 if (unlikely (syllable_serial == 16)) syllable_serial = 1; \
109 find_syllables (hb_buffer_t *buffer)
111 unsigned int p, pe, eof, ts HB_UNUSED, te HB_UNUSED, act HB_UNUSED;
113 hb_glyph_info_t *info = buffer->info;
116 getkey info[p].indic_category();
120 pe = eof = buffer->len;
122 unsigned int last = 0;
123 unsigned int syllable_serial = 1;
129 #endif /* HB_OT_SHAPE_COMPLEX_INDIC_MACHINE_HH */