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_KHMER_MACHINE_HH
28 #define HB_OT_SHAPE_COMPLEX_KHMER_MACHINE_HH
30 #include "hb-private.hh"
33 machine khmer_syllable_machine;
34 alphtype unsigned char;
40 # Same order as enum khmer_category_t. Not sure how to avoid duplication.
54 c = (C | Ra | V); # is_consonant
55 n = ((ZWNJ?.RS)? (N.N?)?); # is_consonant_modifier
56 z = ZWJ|ZWNJ; # is_joiner
59 matra_group = z?.M.N?;
60 syllable_tail = (SM.SM?)?;
63 broken_cluster = n? (Coeng.cn)* matra_group* (Coeng.cn)? syllable_tail;
64 consonant_syllable = (c|PLACEHOLDER|DOTTEDCIRCLE) broken_cluster;
68 consonant_syllable => { found_syllable (consonant_syllable); };
69 broken_cluster => { found_syllable (broken_cluster); };
70 other => { found_syllable (non_khmer_cluster); };
76 #define found_syllable(syllable_type) \
78 if (0) fprintf (stderr, "syllable %d..%d %s\n", last, p+1, #syllable_type); \
79 for (unsigned int i = last; i < p+1; i++) \
80 info[i].syllable() = (syllable_serial << 4) | syllable_type; \
83 if (unlikely (syllable_serial == 16)) syllable_serial = 1; \
87 find_syllables (hb_buffer_t *buffer)
89 unsigned int p, pe, eof, ts HB_UNUSED, te HB_UNUSED, act HB_UNUSED;
91 hb_glyph_info_t *info = buffer->info;
94 getkey info[p].khmer_category();
98 pe = eof = buffer->len;
100 unsigned int last = 0;
101 unsigned int syllable_serial = 1;
107 #endif /* HB_OT_SHAPE_COMPLEX_KHMER_MACHINE_HH */