michael@0: /*
michael@0:  * Copyright © 2011,2012  Google, Inc.
michael@0:  *
michael@0:  *  This is part of HarfBuzz, a text shaping library.
michael@0:  *
michael@0:  * Permission is hereby granted, without written agreement and without
michael@0:  * license or royalty fees, to use, copy, modify, and distribute this
michael@0:  * software and its documentation for any purpose, provided that the
michael@0:  * above copyright notice and the following two paragraphs appear in
michael@0:  * all copies of this software.
michael@0:  *
michael@0:  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
michael@0:  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
michael@0:  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
michael@0:  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
michael@0:  * DAMAGE.
michael@0:  *
michael@0:  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
michael@0:  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
michael@0:  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
michael@0:  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
michael@0:  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
michael@0:  *
michael@0:  * Google Author(s): Behdad Esfahbod
michael@0:  */
michael@0: 
michael@0: #ifndef HB_OT_SHAPE_COMPLEX_MYANMAR_MACHINE_HH
michael@0: #define HB_OT_SHAPE_COMPLEX_MYANMAR_MACHINE_HH
michael@0: 
michael@0: #include "hb-private.hh"
michael@0: 
michael@0: %%{
michael@0:   machine myanmar_syllable_machine;
michael@0:   alphtype unsigned char;
michael@0:   write data;
michael@0: }%%
michael@0: 
michael@0: %%{
michael@0: 
michael@0: # Same order as enum myanmar_category_t.  Not sure how to avoid duplication.
michael@0: A    = 10;
michael@0: As   = 18;
michael@0: C    = 1;
michael@0: D    = 19;
michael@0: D0   = 20;
michael@0: DB   = 3;
michael@0: GB   = 12;
michael@0: H    = 4;
michael@0: IV   = 2;
michael@0: MH   = 21;
michael@0: MR   = 22;
michael@0: MW   = 23;
michael@0: MY   = 24;
michael@0: PT   = 25;
michael@0: V    = 8;
michael@0: VAbv = 26;
michael@0: VBlw = 27;
michael@0: VPre = 28;
michael@0: VPst = 29;
michael@0: VS   = 30;
michael@0: ZWJ  = 6;
michael@0: ZWNJ = 5;
michael@0: Ra   = 16;
michael@0: P    = 31;
michael@0: 
michael@0: j = ZWJ|ZWNJ;			# Joiners
michael@0: k = (Ra As H);			# Kinzi
michael@0: 
michael@0: c = C|Ra;			# is_consonant
michael@0: 
michael@0: medial_group = MY? MR? ((MW MH? | MH) As?)?;
michael@0: main_vowel_group = VPre* VAbv* VBlw* A* (DB As?)?;
michael@0: post_vowel_group = VPst MH? As* VAbv* A* (DB As?)?;
michael@0: pwo_tone_group = PT A* DB? As?;
michael@0: 
michael@0: complex_syllable_tail = As* medial_group main_vowel_group post_vowel_group* pwo_tone_group* V* j?;
michael@0: syllable_tail = (H | complex_syllable_tail);
michael@0: 
michael@0: consonant_syllable =	k? (c|IV|D|GB).VS? (H (c|IV).VS?)* syllable_tail;
michael@0: punctuation_cluster = 	P V;
michael@0: broken_cluster =	k? VS? syllable_tail;
michael@0: other =			any;
michael@0: 
michael@0: main := |*
michael@0: 	consonant_syllable	=> { found_syllable (consonant_syllable); };
michael@0: 	j			=> { found_syllable (non_myanmar_cluster); };
michael@0: 	punctuation_cluster	=> { found_syllable (punctuation_cluster); };
michael@0: 	broken_cluster		=> { found_syllable (broken_cluster); };
michael@0: 	other			=> { found_syllable (non_myanmar_cluster); };
michael@0: *|;
michael@0: 
michael@0: 
michael@0: }%%
michael@0: 
michael@0: #define found_syllable(syllable_type) \
michael@0:   HB_STMT_START { \
michael@0:     if (0) fprintf (stderr, "syllable %d..%d %s\n", last, p+1, #syllable_type); \
michael@0:     for (unsigned int i = last; i < p+1; i++) \
michael@0:       info[i].syllable() = (syllable_serial << 4) | syllable_type; \
michael@0:     last = p+1; \
michael@0:     syllable_serial++; \
michael@0:     if (unlikely (syllable_serial == 16)) syllable_serial = 1; \
michael@0:   } HB_STMT_END
michael@0: 
michael@0: static void
michael@0: find_syllables (hb_buffer_t *buffer)
michael@0: {
michael@0:   unsigned int p, pe, eof, ts HB_UNUSED, te HB_UNUSED, act HB_UNUSED;
michael@0:   int cs;
michael@0:   hb_glyph_info_t *info = buffer->info;
michael@0:   %%{
michael@0:     write init;
michael@0:     getkey info[p].myanmar_category();
michael@0:   }%%
michael@0: 
michael@0:   p = 0;
michael@0:   pe = eof = buffer->len;
michael@0: 
michael@0:   unsigned int last = 0;
michael@0:   unsigned int syllable_serial = 1;
michael@0:   %%{
michael@0:     write exec;
michael@0:   }%%
michael@0: }
michael@0: 
michael@0: #undef found_syllable
michael@0: 
michael@0: #endif /* HB_OT_SHAPE_COMPLEX_MYANMAR_MACHINE_HH */