indic-ot-class-tables.c

GTK+-2.0源码之pango-1.15.6.tar.gz

/* Pango
 * indic-ot-class-tables.c:
 *
 * Copyright (C) 2001, 2002 IBM Corporation.  All Rights Reserved.
 * Author: Eric Mader <[e-mail]>
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use, copy,
 * modify, merge, publish, distribute, and/or sell copies of the
 * Software, and to permit persons to whom the Software is furnished
 * to do so, provided that the above copyright notice(s) and this
 * permission notice appear in all copies of the Software and that
 * both the above copyright notice(s) and this permission notice
 * appear in supporting documentation.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR
 * ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY
 * DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
 * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
 * OF THIS SOFTWARE.
 *
 * Except as contained in this notice, the name of a copyright holder
 * shall not be used in advertising or otherwise to promote the sale,
 * use or other dealings in this Software without prior written
 * authorization of the copyright holder.
 */

#include <config.h>

#include "indic-ot.h"


/*
 * Split matra table indices
 */
#define _x1 (1 << CF_INDEX_SHIFT)
#define _x2 (2 << CF_INDEX_SHIFT)
#define _x3 (3 << CF_INDEX_SHIFT)
#define _x4 (4 << CF_INDEX_SHIFT)
#define _x5 (5 << CF_INDEX_SHIFT)
#define _x6 (6 << CF_INDEX_SHIFT)
#define _x7 (7 << CF_INDEX_SHIFT)
#define _x8 (8 << CF_INDEX_SHIFT)
#define _x9 (9 << CF_INDEX_SHIFT)

/*
 * Simple classes
 */
#define _xx (CC_RESERVED)
#define _ma (CC_MODIFYING_MARK_ABOVE)
#define _mp (CC_MODIFYING_MARK_POST)
#define _iv (CC_INDEPENDENT_VOWEL)
#define _ct (CC_CONSONANT | CF_CONSONANT)
#define _cn (CC_CONSONANT_WITH_NUKTA | CF_CONSONANT)
#define _nu (CC_NUKTA)
#define _dv (CC_DEPENDENT_VOWEL)
#define _dl (_dv | CF_MATRA_PRE)
#define _db (_dv | CF_MATRA_BELOW)
#define _da (_dv | CF_MATRA_ABOVE)
#define _dr (_dv | CF_MATRA_POST)
#define _lm (_dv | CF_LENGTH_MARK)
#define _vr (CC_VIRAMA)
#define _al (CC_AL_LAKUNA)

/*
 * Split matras
 */
#define _s1 (_dv | _x1)
#define _s2 (_dv | _x2)
#define _s3 (_dv | _x3)
#define _s4 (_dv | _x4)
#define _s5 (_dv | _x5)
#define _s6 (_dv | _x6)
#define _s7 (_dv | _x7)
#define _s8 (_dv | _x8)
#define _s9 (_dv | _x9)

/*
 * consonants with special forms
 * NOTE: this assumes that no consonants with nukta have
 * special forms... (Bengali RA?)
 */
#define _bb (_ct | CF_BELOW_BASE)
#define _pb (_ct | CF_POST_BASE)
#define _vt (_bb | CF_VATTU)
#define _rv (_vt | CF_REPH)
#define _rp (_pb | CF_REPH)
#define _rb (_bb | CF_REPH)


/*
 * Character class tables
 */
static const IndicOTCharClass devaCharClasses[] =
{
    _xx, _ma, _ma, _mp, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, /* 0900 - 090F */
    _iv, _iv, _iv, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, /* 0910 - 091F */
    _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _cn, _ct, _ct, _ct, _ct, _ct, _ct, /* 0920 - 092F */
    _rv, _cn, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _dr, _dl, /* 0930 - 093F */
    _dr, _db, _db, _db, _db, _da, _da, _da, _da, _dr, _dr, _dr, _dr, _vr, _xx, _xx, /* 0940 - 094F */
    _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _cn, _cn, _cn, _cn, _cn, _cn, _cn, _cn, /* 0950 - 095F */
    _iv, _iv, _db, _db, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, /* 0960 - 096F */
    _xx                                                                             /* 0970        */
};

/* As a hack, BENGALI LETTER A (U+0985) and BENGALI LETTER E (U+098F)
 * are marked as consonants below; this gives approximately the
 * right behavior for the sequences "a halant ya aa" and
 * "e halant ya aa".
 */
static const IndicOTCharClass bengCharClasses[] =
{
    _xx, _ma, _mp, _mp, _xx, _ct, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _ct, /* 0980 - 098F */
    _iv, _xx, _xx, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, /* 0990 - 099F */
    _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _bb, _ct, _ct, _pb, /* 09A0 - 09AF */
    _rv, _xx, _ct, _xx, _xx, _xx, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _dr, _dl, /* 09B0 - 09BF */
    _dr, _db, _db, _db, _db, _xx, _xx, _dl, _dl, _xx, _xx, _s1, _s2, _vr, _xx, _xx, /* 09C0 - 09CF */
    _xx, _xx, _xx, _xx, _xx, _xx, _xx, _dr, _xx, _xx, _xx, _xx, _cn, _cn, _xx, _cn, /* 09D0 - 09DF */
    _iv, _iv, _dv, _dv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, /* 09E0 - 09EF */
    _rv, _ct, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx                           /* 09F0 - 09FA */
};

static const IndicOTCharClass guruCharClasses[] =
{
    _xx, _ma, _ma, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _xx, _xx, _iv, /* 0A00 - 0A0F */
    _iv, _xx, _xx, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, /* 0A10 - 0A1F */
    _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _bb, /* 0A20 - 0A2F */
    _vt, _xx, _ct, _cn, _xx, _bb, _cn, _xx, _ct, _bb, _xx, _xx, _nu, _xx, _dr, _dl, /* 0A30 - 0A3F */
    _dr, _db, _db, _xx, _xx, _xx, _xx, _da, _da, _xx, _xx, _da, _da, _vr, _xx, _xx, /* 0A40 - 0A4F */
    _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _cn, _cn, _cn, _ct, _xx, _cn, _xx, /* 0A50 - 0A5F */
    _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, /* 0A60 - 0A6F */
    _ma, _ma, _ct, _ct, _xx                                                         /* 0A70 - 0A74 */
};

static const IndicOTCharClass gujrCharClasses[] =
{
    _xx, _ma, _ma, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _xx, _iv, /* 0A80 - 0A8F */
    _iv, _iv, _xx, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, /* 0A90 - 0A9F */
    _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _ct, /* 0AA0 - 0AAF */
    _rv, _xx, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _xx, _xx, _nu, _xx, _dr, _dl, /* 0AB0 - 0ABF */
    _dr, _db, _db, _db, _db, _da, _xx, _da, _da, _dr, _xx, _dr, _dr, _vr, _xx, _xx, /* 0AC0 - 0ACF */
    _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, /* 0AD0 - 0ADF */
    _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx  /* 0AE0 - 0AEF */
};

static const IndicOTCharClass oryaCharClasses[] =
{
    _xx, _ma, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _iv, /* 0B00 - 0B0F */
    _iv, _xx, _xx, _iv, _iv, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _ct, _bb, /* 0B10 - 0B1F */
    _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _pb, /* 0B20 - 0B2F */
    _rb, _xx, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _xx, _xx, _nu, _xx, _dr, _da, /* 0B30 - 0B3F */
    _dr, _db, _db, _db, _xx, _xx, _xx, _dl, _s1, _xx, _xx, _s2, _s3, _vr, _xx, _xx, /* 0B40 - 0B4F */
    _xx, _xx, _xx, _xx, _xx, _xx, _da, _dr, _xx, _xx, _xx, _xx, _cn, _cn, _xx, _pb, /* 0B50 - 0B5F */
    _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, /* 0B60 - 0B6F */
    _xx, _bb                                                                        /* 0B70 - 0B71 */
};

static const IndicOTCharClass tamlCharClasses[] =
{
    _xx, _xx, _ma, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _xx, _iv, _iv, /* 0B80 - 0B8F */
    _iv, _xx, _iv, _iv, _iv, _ct, _xx, _xx, _xx, _ct, _ct, _xx, _ct, _xx, _ct, _ct, /* 0B90 - 0B9F */
    _xx, _xx, _xx, _ct, _ct, _xx, _xx, _xx, _ct, _ct, _ct, _xx, _xx, _xx, _ct, _ct, /* 0BA0 - 0BAF */
    _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _ct, _xx, _xx, _xx, _xx, _dr, _dr, /* 0BB0 - 0BBF */
    _da, _dr, _dr, _xx, _xx, _xx, _dl, _dl, _dl, _xx, _s1, _s2, _s3, _vr, _xx, _xx, /* 0BC0 - 0BCF */
    _xx, _xx, _xx, _xx, _xx, _xx, _xx, _dr, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, /* 0BD0 - 0BDF */
    _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, /* 0BE0 - 0BEF */
    _xx, _xx, _xx                                                                   /* 0BF0 - 0BF2 */
};

/* FIXME: Should some of the bb's be pb's? (KA, NA, MA, YA, VA, etc. (approx 13)) */
static const IndicOTCharClass teluCharClasses[] =
{
    _xx, _mp, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _iv, /* 0C00 - 0C0F */
    _iv, _xx, _iv, _iv, _iv, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, /* 0C10 - 0C1F */
    _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _bb, /* 0C20 - 0C2F */
    _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _xx, _xx, _xx, _xx, _da, _da, /* 0C30 - 0C3F */
    _da, _dr, _dr, _dr, _dr, _xx, _da, _da, _s1, _xx, _da, _da, _da, _vr, _xx, _xx, /* 0C40 - 0C4F */
    _xx, _xx, _xx, _xx, _xx, _da, _db, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, /* 0C50 - 0C5F */
    _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx  /* 0C60 - 0C6F */
};

/* U+CC3 and U+CC4 are _lm here not _dr since the Kannada rendering
 * rules want them below and to the right of the entire cluster. They
 * aren't, strictly speaking, length marks, however.
 *
 * There's some information about this in:
 *
 *  http://brahmi.sourceforge.net/docs/KannadaComputing.html
 */
static const IndicOTCharClass kndaCharClasses[] =
{
    _xx, _xx, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, /* 0C80 - 0C8F */
    _iv, _xx, _iv, _iv, _iv, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, /* 0C90 - 0C9F */
    _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _bb, /* 0CA0 - 0CAF */
    _rb, _ct, _bb, _bb, _xx, _bb, _bb, _bb, _bb, _bb, _xx, _xx, _xx, _xx, _dr, _da, /* 0CB0 - 0CBF */
    _s1, _dr, _dr, _lm, _lm, _xx, _da, _s2, _s3, _xx, _s4, _s5, _da, _vr, _xx, _xx, /* 0CC0 - 0CCF */
    _xx, _xx, _xx, _xx, _xx, _lm, _lm, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _ct, _xx, /* 0CD0 - 0CDF */
    _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx  /* 0CE0 - 0CEF */
};

/*
 * FIXME: this is correct for old-style Malayalam (MAL) but not for reformed Malayalam (MLR)
 * FIXME: should there be a REPH for old-style Malayalam?
 */
static const IndicOTCharClass mlymCharClasses[] =
{
    _xx, _xx, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _iv, _iv, /* 0D00 - 0D0F */
    _iv, _xx, _iv, _iv, _iv, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, /* 0D10 - 0D1F */
    _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _pb, /* 0D20 - 0D2F */
    _cn, _cn, _ct, _ct, _ct, _pb, _ct, _ct, _ct, _ct, _xx, _xx, _xx, _xx, _dr, _dr, /* 0D30 - 0D3F */
    _dr, _dr, _dr, _dr, _xx, _xx, _dl, _dl, _dl, _xx, _s1, _s2, _s3, _vr, _xx, _xx, /* 0D40 - 0D4F */
    _xx, _xx, _xx, _xx, _xx, _xx, _xx, _dr, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, /* 0D50 - 0D5F */
    _iv, _iv, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx  /* 0D60 - 0D6F */
};

static const IndicOTCharClass sinhCharClasses[] =
{
    _xx, _xx, _mp, _mp, _xx, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, _iv, /* 0D80 - 0D8F */
    _iv, _iv, _iv, _iv, _iv, _iv, _iv, _xx, _xx, _xx, _ct, _ct, _ct, _ct, _ct, _ct, /* 0D90 - 0D9F */
    _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, /* 0DA0 - 0DAF */
    _ct, _ct, _xx, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _ct, _xx, _xx, /* 0DB0 - 0DBF */
    _ct, _ct, _ct, _ct, _ct, _ct, _ct, _xx, _xx, _xx, _al, _xx, _xx, _xx, _xx, _dr, /* 0DC0 - 0DCF */
    _dr, _dr, _da, _da, _db, _xx, _db, _xx, _dr, _dl, _s1, _dl, _s2, _s3, _s4, _dr, /* 0DD0 - 0DDF */
    _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, _xx, /* 0DE0 - 0DEF */
    _xx, _xx, _dr, _dr, _xx                                                         /* 0DF0 - 0DF4 */
};


/*
 * Split matra tables
 */
static const IndicOTSplitMatra bengSplitTable[] = {{0x09C7, 0x09BE}, {0x09C7, 0x09D7}};

static const IndicOTSplitMatra oryaSplitTable[] = {{0x0B47, 0x0B56}, {0x0B47, 0x0B3E}, {0x0B47, 0x0B57}};

static const IndicOTSplitMatra tamlSplitTable[] = {{0x0BC6, 0x0BBE}, {0x0BC7, 0x0BBE}, {0x0BC6, 0x0BD7}};

static const IndicOTSplitMatra teluSplitTable[] = {{0x0C46, 0x0C56}};

static const IndicOTSplitMatra kndaSplitTable[] = {{0x0CBF, 0x0CD5}, {0x0CC6, 0x0CD5}, {0x0CC6, 0x0CD6}, {0x0CC6, 0x0CC2},
				      {0x0CC6, 0x0CC2, 0x0CD5}};

static const IndicOTSplitMatra mlymSplitTable[] = {{0x0D46, 0x0D3E}, {0x0D47, 0x0D3E}, {0x0D46, 0x0D57}};

static const IndicOTSplitMatra sinhSplitTable[] = {{0x0DD9, 0x0DCA}, {0x0DD9, 0x0DCF}, {0x0DD9, 0x0DCF, 0x0DCA},
						   {0x0DD9, 0x0DDF} };


/*
 * Script Flags
 */

/*
 * FIXME: post 'GSUB' reordering of MATRA_PRE's for Malayalam and Tamil
 * FIXME: reformed Malayalam needs to reorder VATTU to before base glyph...