The Tor Browser: gfx/harfbuzz/src/hb-ot-shape-complex-sea-machine.rl@925c144e1f1f

     1 /*

     2  * Copyright © 2011,2012,2013  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  */

    27 #ifndef HB_OT_SHAPE_COMPLEX_SEA_MACHINE_HH

    28 #define HB_OT_SHAPE_COMPLEX_SEA_MACHINE_HH

    30 #include "hb-private.hh"

    32 %%{

    33   machine sea_syllable_machine;

    34   alphtype unsigned char;

    35   write data;

    36 }%%

    38 %%{

    40 # Same order as enum sea_category_t.  Not sure how to avoid duplication.

    41 C    = 1;

    42 GB   = 12; # Generic Base

    43 H    = 4;  # Halant

    44 IV   = 2;  # Independent Vowel

    45 MR   = 22; # Medial Ra

    46 CM   = 17; # Consonant Medial

    47 VAbv = 26;

    48 VBlw = 27;

    49 VPre = 28;

    50 VPst = 29;

    51 T    = 3;  # Tone Marks

    52 A    = 10; # Anusvara

    54 syllable_tail = (VPre|VAbv|VBlw|VPst|H.C|CM|MR|T|A)*;

    56 consonant_syllable =	(C|IV|GB) syllable_tail;

    57 broken_cluster =	syllable_tail;

    58 other =			any;

    60 main := |*

    61 	consonant_syllable	=> { found_syllable (consonant_syllable); };

    62 	broken_cluster		=> { found_syllable (broken_cluster); };

    63 	other			=> { found_syllable (non_sea_cluster); };

    64 *|;

    67 }%%

    69 #define found_syllable(syllable_type) \

    70   HB_STMT_START { \

    71     if (0) fprintf (stderr, "syllable %d..%d %s\n", last, p+1, #syllable_type); \

    72     for (unsigned int i = last; i < p+1; i++) \

    73       info[i].syllable() = (syllable_serial << 4) | syllable_type; \

    74     last = p+1; \

    75     syllable_serial++; \

    76     if (unlikely (syllable_serial == 16)) syllable_serial = 1; \

    77   } HB_STMT_END

    79 static void

    80 find_syllables (hb_buffer_t *buffer)

    81 {

    82   unsigned int p, pe, eof, ts HB_UNUSED, te HB_UNUSED, act HB_UNUSED;

    83   int cs;

    84   hb_glyph_info_t *info = buffer->info;

    85   %%{

    86     write init;

    87     getkey info[p].sea_category();

    88   }%%

    90   p = 0;

    91   pe = eof = buffer->len;

    93   unsigned int last = 0;

    94   unsigned int syllable_serial = 1;

    95   %%{

    96     write exec;

    97   }%%

    98 }

   100 #undef found_syllable

   102 #endif /* HB_OT_SHAPE_COMPLEX_SEA_MACHINE_HH */

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