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_MYANMAR_MACHINE_HH
28#define HB_OT_SHAPE_COMPLEX_MYANMAR_MACHINE_HH
29
30#include "hb-private.hh"
31
32%%{
33  machine myanmar_syllable_machine;
34  alphtype unsigned char;
35  write data;
36}%%
37
38%%{
39
40# Same order as enum myanmar_category_t.  Not sure how to avoid duplication.
41A    = 10;
42As   = 18;
43C    = 1;
44D    = 19;
45D0   = 20;
46DB   = 3;
47GB   = 12;
48H    = 4;
49IV   = 2;
50MH   = 21;
51MR   = 22;
52MW   = 23;
53MY   = 24;
54PT   = 25;
55V    = 8;
56VAbv = 26;
57VBlw = 27;
58VPre = 28;
59VPst = 29;
60VS   = 30;
61ZWJ  = 6;
62ZWNJ = 5;
63Ra   = 16;
64
65j = ZWJ|ZWNJ;			# Joiners
66k = (Ra As H);			# Kinzi
67
68c = C|Ra;			# is_consonant
69
70medial_group = MY? MR? ((MW MH? | MH) As?)?;
71main_vowel_group = VPre* VAbv* VBlw* A* (DB As?)?;
72post_vowel_group = VPst MH? As* VAbv* A* (DB As?)?;
73pwo_tone_group = PT A* (DB As?)?;
74
75complex_syllable_tail = As* medial_group main_vowel_group post_vowel_group* pwo_tone_group* V* j?;
76syllable_tail = (H | complex_syllable_tail);
77
78consonant_syllable =	k? (c|IV|D|GB).VS? (H (c|IV).VS?)* syllable_tail;
79broken_cluster =	k? VS? syllable_tail;
80other =			any;
81
82main := |*
83	consonant_syllable	=> { found_syllable (consonant_syllable); };
84	j			=> { found_syllable (non_myanmar_cluster); };
85	broken_cluster		=> { found_syllable (broken_cluster); };
86	other			=> { found_syllable (non_myanmar_cluster); };
87*|;
88
89
90}%%
91
92#define found_syllable(syllable_type) \
93  HB_STMT_START { \
94    if (0) fprintf (stderr, "syllable %d..%d %s\n", last, p+1, #syllable_type); \
95    for (unsigned int i = last; i < p+1; i++) \
96      info[i].syllable() = (syllable_serial << 4) | syllable_type; \
97    last = p+1; \
98    syllable_serial++; \
99    if (unlikely (syllable_serial == 16)) syllable_serial = 1; \
100  } HB_STMT_END
101
102static void
103find_syllables (hb_buffer_t *buffer)
104{
105  unsigned int p, pe, eof, ts HB_UNUSED, te HB_UNUSED, act HB_UNUSED;
106  int cs;
107  hb_glyph_info_t *info = buffer->info;
108  %%{
109    write init;
110    getkey info[p].myanmar_category();
111  }%%
112
113  p = 0;
114  pe = eof = buffer->len;
115
116  unsigned int last = 0;
117  unsigned int syllable_serial = 1;
118  %%{
119    write exec;
120  }%%
121}
122
123#undef found_syllable
124
125#endif /* HB_OT_SHAPE_COMPLEX_MYANMAR_MACHINE_HH */
126