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/*
* 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_SHAPER_MYANMAR_MACHINE_HH
#define HB_OT_SHAPER_MYANMAR_MACHINE_HH
#include "hb.hh"
#include "hb-ot-layout.hh"
#include "hb-ot-shaper-indic.hh"
/* buffer var allocations */
#define myanmar_category() ot_shaper_var_u8_category() /* myanmar_category_t */
#define myanmar_position() ot_shaper_var_u8_auxiliary() /* myanmar_position_t */
using myanmar_category_t = unsigned;
using myanmar_position_t = ot_position_t;
#define M_Cat(Cat) myanmar_syllable_machine_ex_##Cat
enum myanmar_syllable_type_t {
myanmar_consonant_syllable,
myanmar_broken_cluster,
myanmar_non_myanmar_cluster,
};
%%{
machine myanmar_syllable_machine;
alphtype unsigned char;
write exports;
write data;
}%%
%%{
# Spec category D is folded into GB; D0 is not implemented by Uniscribe and as such folded into D
# Spec category P is folded into GB
export C = 1;
export IV = 2;
export DB = 3; # Dot below = OT_N
export H = 4;
export ZWNJ = 5;
export ZWJ = 6;
export SM = 8; # Visarga and Shan tones
export GB = 10; # = OT_PLACEHOLDER
export DOTTEDCIRCLE = 11;
export A = 9;
export Ra = 15;
export CS = 18;
export VAbv = 20;
export VBlw = 21;
export VPre = 22;
export VPst = 23;
# 32+ are for Myanmar-specific values
export As = 32; # Asat
export MH = 35; # Medial Ha
export MR = 36; # Medial Ra
export MW = 37; # Medial Wa, Shan Wa
export MY = 38; # Medial Ya, Mon Na, Mon Ma
export PT = 39; # Pwo and other tones
export VS = 40; # Variation selectors
export ML = 41; # Medial Mon La
j = ZWJ|ZWNJ; # Joiners
k = (Ra As H); # Kinzi
c = C|Ra; # is_consonant
medial_group = MY? As? MR? ((MW MH? ML? | MH ML? | ML) As?)?;
main_vowel_group = (VPre.VS?)* VAbv* VBlw* A* (DB As?)?;
post_vowel_group = VPst MH? ML? As* VAbv* A* (DB As?)?;
pwo_tone_group = PT A* DB? As?;
complex_syllable_tail = As* medial_group main_vowel_group post_vowel_group* pwo_tone_group* SM* j?;
syllable_tail = (H (c|IV).VS?)* (H | complex_syllable_tail);
consonant_syllable = (k|CS)? (c|IV|GB|DOTTEDCIRCLE).VS? syllable_tail;
broken_cluster = k? VS? syllable_tail;
other = any;
main := |*
consonant_syllable => { found_syllable (myanmar_consonant_syllable); };
j => { found_syllable (myanmar_non_myanmar_cluster); };
broken_cluster => { found_syllable (myanmar_broken_cluster); buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_BROKEN_SYLLABLE; };
other => { found_syllable (myanmar_non_myanmar_cluster); };
*|;
}%%
#define found_syllable(syllable_type) \
HB_STMT_START { \
if (0) fprintf (stderr, "syllable %d..%d %s\n", ts, te, #syllable_type); \
for (unsigned int i = ts; i < te; i++) \
info[i].syllable() = (syllable_serial << 4) | syllable_type; \
syllable_serial++; \
if (syllable_serial == 16) syllable_serial = 1; \
} HB_STMT_END
inline void
find_syllables_myanmar (hb_buffer_t *buffer)
{
unsigned int p, pe, eof, ts, te, act HB_UNUSED;
int cs;
hb_glyph_info_t *info = buffer->info;
%%{
write init;
getkey info[p].myanmar_category();
}%%
p = 0;
pe = eof = buffer->len;
unsigned int syllable_serial = 1;
%%{
write exec;
}%%
}
#undef found_syllable
#endif /* HB_OT_SHAPER_MYANMAR_MACHINE_HH */
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