michael@0: /*
michael@0:  * Copyright © 2011,2012,2013  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_SEA_MACHINE_HH
michael@0: #define HB_OT_SHAPE_COMPLEX_SEA_MACHINE_HH
michael@0: 
michael@0: #include "hb-private.hh"
michael@0: 
michael@0: %%{
michael@0:   machine sea_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 sea_category_t.  Not sure how to avoid duplication.
michael@0: C    = 1;
michael@0: GB   = 12; # Generic Base
michael@0: H    = 4;  # Halant
michael@0: IV   = 2;  # Independent Vowel
michael@0: MR   = 22; # Medial Ra
michael@0: CM   = 17; # Consonant Medial
michael@0: VAbv = 26;
michael@0: VBlw = 27;
michael@0: VPre = 28;
michael@0: VPst = 29;
michael@0: T    = 3;  # Tone Marks
michael@0: A    = 10; # Anusvara
michael@0: 
michael@0: syllable_tail = (VPre|VAbv|VBlw|VPst|H.C|CM|MR|T|A)*;
michael@0: 
michael@0: consonant_syllable =	(C|IV|GB) syllable_tail;
michael@0: broken_cluster =	syllable_tail;
michael@0: other =			any;
michael@0: 
michael@0: main := |*
michael@0: 	consonant_syllable	=> { found_syllable (consonant_syllable); };
michael@0: 	broken_cluster		=> { found_syllable (broken_cluster); };
michael@0: 	other			=> { found_syllable (non_sea_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].sea_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_SEA_MACHINE_HH */