summaryrefslogtreecommitdiff
path: root/Build/source/libs/harfbuzz/harfbuzz-1.0.1/src/hb-ot-shape-complex-indic-machine.rl
blob: 694b235d1d1cb9bb14a104b90b548944a30c16ca (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
/*
 * Copyright © 2011,2012  Google, Inc.
 *
 *  This is part of HarfBuzz, a text shaping library.
 *
 * Permission is hereby granted, without written agreement and without
 * license or royalty fees, to use, copy, modify, and distribute this
 * software and its documentation for any purpose, provided that the
 * above copyright notice and the following two paragraphs appear in
 * all copies of this software.
 *
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 *
 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 *
 * Google Author(s): Behdad Esfahbod
 */

#ifndef HB_OT_SHAPE_COMPLEX_INDIC_MACHINE_HH
#define HB_OT_SHAPE_COMPLEX_INDIC_MACHINE_HH

#include "hb-private.hh"

%%{
  machine indic_syllable_machine;
  alphtype unsigned char;
  write data;
}%%

%%{

# Same order as enum indic_category_t.  Not sure how to avoid duplication.
X    = 0;
C    = 1;
V    = 2;
N    = 3;
H    = 4;
ZWNJ = 5;
ZWJ  = 6;
M    = 7;
SM   = 8;
VD   = 9;
A    = 10;
PLACEHOLDER = 11;
DOTTEDCIRCLE = 12;
RS    = 13;
Coeng = 14;
Repha = 15;
Ra    = 16;
CM    = 17;
Symbol= 18;
CM2   = 31;

c = (C | Ra);			# is_consonant
n = ((ZWNJ?.RS)? (N.N?)?);	# is_consonant_modifier
z = ZWJ|ZWNJ;			# is_joiner
h = H | Coeng;			# is_halant_or_coeng
reph = (Ra H | Repha);		# possible reph

cn = c.ZWJ?.n?;
forced_rakar = ZWJ H ZWJ Ra;
symbol = Symbol.N?;
matra_group = z{0,3}.M.N?.(H | forced_rakar)?;
syllable_tail = (z?.SM.SM?.ZWNJ?)? A{0,3}? VD{0,2};
place_holder = PLACEHOLDER | DOTTEDCIRCLE;
halant_group = (z?.h.(ZWJ.N?)?);
final_halant_group = halant_group | h.ZWNJ;
medial_group = CM?.CM2?;
halant_or_matra_group = (final_halant_group | (h.ZWJ)? matra_group{0,4}) (Coeng (cn|V))?;


consonant_syllable =	Repha? (cn.halant_group){0,4} cn medial_group halant_or_matra_group syllable_tail;
vowel_syllable =	reph? V.n? (ZWJ | (halant_group.cn){0,4} medial_group halant_or_matra_group syllable_tail);
standalone_cluster =	(Repha? PLACEHOLDER | reph? DOTTEDCIRCLE).n? (halant_group.cn){0,4} medial_group halant_or_matra_group syllable_tail;
symbol_cluster = 	symbol syllable_tail;
broken_cluster =	reph? n? (halant_group.cn){0,4} medial_group halant_or_matra_group syllable_tail;
other =			any;

main := |*
	consonant_syllable	=> { found_syllable (consonant_syllable); };
	vowel_syllable		=> { found_syllable (vowel_syllable); };
	standalone_cluster	=> { found_syllable (standalone_cluster); };
	symbol_cluster		=> { found_syllable (symbol_cluster); };
	broken_cluster		=> { found_syllable (broken_cluster); };
	other			=> { found_syllable (non_indic_cluster); };
*|;


}%%

#define found_syllable(syllable_type) \
  HB_STMT_START { \
    if (0) fprintf (stderr, "syllable %d..%d %s\n", last, p+1, #syllable_type); \
    for (unsigned int i = last; i < p+1; i++) \
      info[i].syllable() = (syllable_serial << 4) | syllable_type; \
    last = p+1; \
    syllable_serial++; \
    if (unlikely (syllable_serial == 16)) syllable_serial = 1; \
  } HB_STMT_END

static void
find_syllables (hb_buffer_t *buffer)
{
  unsigned int p, pe, eof, ts HB_UNUSED, te HB_UNUSED, act HB_UNUSED;
  int cs;
  hb_glyph_info_t *info = buffer->info;
  %%{
    write init;
    getkey info[p].indic_category();
  }%%

  p = 0;
  pe = eof = buffer->len;

  unsigned int last = 0;
  unsigned int syllable_serial = 1;
  %%{
    write exec;
  }%%
}

#endif /* HB_OT_SHAPE_COMPLEX_INDIC_MACHINE_HH */