1/*
2 * Copyright © 2011,2012,2013  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_SEA_MACHINE_HH
28#define HB_OT_SHAPE_COMPLEX_SEA_MACHINE_HH
29
30#include "hb-private.hh"
31
32%%{
33  machine sea_syllable_machine;
34  alphtype unsigned char;
35  write data;
36}%%
37
38%%{
39
40# Same order as enum sea_category_t.  Not sure how to avoid duplication.
41C    = 1;
42GB   = 12; # Generic Base
43H    = 4;  # Halant
44IV   = 2;  # Independent Vowel
45MR   = 22; # Medial Ra
46CM   = 17; # Consonant Medial
47VAbv = 26;
48VBlw = 27;
49VPre = 28;
50VPst = 29;
51T    = 3;  # Tone Marks
52A    = 10; # Anusvara
53
54syllable_tail = (VPre|VAbv|VBlw|VPst|H.C|CM|MR|T|A)*;
55
56consonant_syllable =	(C|IV|GB) syllable_tail;
57broken_cluster =	syllable_tail;
58other =			any;
59
60main := |*
61	consonant_syllable	=> { found_syllable (consonant_syllable); };
62	broken_cluster		=> { found_syllable (broken_cluster); };
63	other			=> { found_syllable (non_sea_cluster); };
64*|;
65
66
67}%%
68
69#define found_syllable(syllable_type) \
70  HB_STMT_START { \
71    if (0) fprintf (stderr, "syllable %d..%d %s\n", last, p+1, #syllable_type); \
72    for (unsigned int i = last; i < p+1; i++) \
73      info[i].syllable() = (syllable_serial << 4) | syllable_type; \
74    last = p+1; \
75    syllable_serial++; \
76    if (unlikely (syllable_serial == 16)) syllable_serial = 1; \
77  } HB_STMT_END
78
79static void
80find_syllables (hb_buffer_t *buffer)
81{
82  unsigned int p, pe, eof, ts HB_UNUSED, te HB_UNUSED, act HB_UNUSED;
83  int cs;
84  hb_glyph_info_t *info = buffer->info;
85  %%{
86    write init;
87    getkey info[p].sea_category();
88  }%%
89
90  p = 0;
91  pe = eof = buffer->len;
92
93  unsigned int last = 0;
94  unsigned int syllable_serial = 1;
95  %%{
96    write exec;
97  }%%
98}
99
100#undef found_syllable
101
102#endif /* HB_OT_SHAPE_COMPLEX_SEA_MACHINE_HH */
103