mirror of
https://github.com/reactos/reactos.git
synced 2024-08-21 10:53:15 +00:00
374 lines
12 KiB
C
374 lines
12 KiB
C
/*
|
|
* Implementation of Indic Syllables for the Uniscribe Script Processor
|
|
*
|
|
* Copyright 2011 CodeWeavers, Aric Stewart
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
|
|
*
|
|
*/
|
|
|
|
#include "usp10_internal.h"
|
|
|
|
WINE_DEFAULT_DEBUG_CHANNEL(uniscribe);
|
|
|
|
static void debug_output_string(const WCHAR *str, unsigned int char_count, lexical_function f)
|
|
{
|
|
int i;
|
|
if (TRACE_ON(uniscribe))
|
|
{
|
|
for (i = 0; i < char_count; ++i)
|
|
{
|
|
switch (f(str[i]))
|
|
{
|
|
case lex_Consonant: TRACE("C"); break;
|
|
case lex_Ra: TRACE("Ra"); break;
|
|
case lex_Vowel: TRACE("V"); break;
|
|
case lex_Nukta: TRACE("N"); break;
|
|
case lex_Halant: TRACE("H"); break;
|
|
case lex_ZWNJ: TRACE("Zwnj"); break;
|
|
case lex_ZWJ: TRACE("Zwj"); break;
|
|
case lex_Matra_post: TRACE("Mp");break;
|
|
case lex_Matra_above: TRACE("Ma");break;
|
|
case lex_Matra_below: TRACE("Mb");break;
|
|
case lex_Matra_pre: TRACE("Mm");break;
|
|
case lex_Modifier: TRACE("Sm"); break;
|
|
case lex_Vedic: TRACE("Vd"); break;
|
|
case lex_Anudatta: TRACE("A"); break;
|
|
case lex_Composed_Vowel: TRACE("t"); break;
|
|
default:
|
|
TRACE("X"); break;
|
|
}
|
|
}
|
|
TRACE("\n");
|
|
}
|
|
}
|
|
|
|
static inline BOOL is_matra( int type )
|
|
{
|
|
return (type == lex_Matra_above || type == lex_Matra_below ||
|
|
type == lex_Matra_pre || type == lex_Matra_post ||
|
|
type == lex_Composed_Vowel);
|
|
}
|
|
|
|
static inline BOOL is_joiner( int type )
|
|
{
|
|
return (type == lex_ZWJ || type == lex_ZWNJ);
|
|
}
|
|
|
|
static int consonant_header(const WCHAR *input, unsigned int cChar,
|
|
unsigned int start, unsigned int next, lexical_function lex)
|
|
{
|
|
if (!is_consonant( lex(input[next]) )) return -1;
|
|
next++;
|
|
if ((next < cChar) && lex(input[next]) == lex_Nukta)
|
|
next++;
|
|
if ((next < cChar) && lex(input[next])==lex_Halant)
|
|
{
|
|
next++;
|
|
if((next < cChar) && is_joiner( lex(input[next]) ))
|
|
next++;
|
|
if ((next < cChar) && is_consonant( lex(input[next]) ))
|
|
return next;
|
|
}
|
|
else if ((next < cChar) && is_joiner( lex(input[next]) ) && lex(input[next+1])==lex_Halant)
|
|
{
|
|
next+=2;
|
|
if ((next < cChar) && is_consonant( lex(input[next]) ))
|
|
return next;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static int parse_consonant_syllable(const WCHAR *input, unsigned int cChar,
|
|
unsigned int start, unsigned int *main, unsigned int next, lexical_function lex)
|
|
{
|
|
int check;
|
|
int headers = 0;
|
|
do
|
|
{
|
|
check = consonant_header(input,cChar,start,next,lex);
|
|
if (check != -1)
|
|
{
|
|
next = check;
|
|
headers++;
|
|
}
|
|
} while (check != -1);
|
|
if (headers || is_consonant( lex(input[next]) ))
|
|
{
|
|
*main = next;
|
|
next++;
|
|
}
|
|
else
|
|
return -1;
|
|
if ((next < cChar) && lex(input[next]) == lex_Nukta)
|
|
next++;
|
|
if ((next < cChar) && lex(input[next]) == lex_Anudatta)
|
|
next++;
|
|
|
|
if ((next < cChar) && lex(input[next]) == lex_Halant)
|
|
{
|
|
next++;
|
|
if((next < cChar) && is_joiner( lex(input[next]) ))
|
|
next++;
|
|
}
|
|
else if (next < cChar)
|
|
{
|
|
while((next < cChar) && is_matra( lex(input[next]) ))
|
|
next++;
|
|
if ((next < cChar) && lex(input[next]) == lex_Nukta)
|
|
next++;
|
|
if ((next < cChar) && lex(input[next]) == lex_Halant)
|
|
next++;
|
|
}
|
|
if ((next < cChar) && lex(input[next]) == lex_Modifier)
|
|
next++;
|
|
if ((next < cChar) && lex(input[next]) == lex_Vedic)
|
|
next++;
|
|
return next;
|
|
}
|
|
|
|
static int parse_vowel_syllable(const WCHAR *input, unsigned int cChar,
|
|
unsigned int start, unsigned int next, lexical_function lex)
|
|
{
|
|
if ((next < cChar) && lex(input[next]) == lex_Nukta)
|
|
next++;
|
|
if ((next < cChar) && is_joiner( lex(input[next]) ) && lex(input[next+1])==lex_Halant && is_consonant( lex(input[next+2]) ))
|
|
next+=3;
|
|
else if ((next < cChar) && lex(input[next])==lex_Halant && is_consonant( lex(input[next+1]) ))
|
|
next+=2;
|
|
else if ((next < cChar) && lex(input[next])==lex_ZWJ && is_consonant( lex(input[next+1]) ))
|
|
next+=2;
|
|
|
|
if ((next < cChar) && is_matra( lex(input[next]) ))
|
|
{
|
|
while((next < cChar) && is_matra( lex(input[next]) ))
|
|
next++;
|
|
if ((next < cChar) && lex(input[next]) == lex_Nukta)
|
|
next++;
|
|
if ((next < cChar) && lex(input[next]) == lex_Halant)
|
|
next++;
|
|
}
|
|
|
|
if ((next < cChar) && lex(input[next]) == lex_Modifier)
|
|
next++;
|
|
if ((next < cChar) && lex(input[next]) == lex_Vedic)
|
|
next++;
|
|
return next;
|
|
}
|
|
|
|
static int Indic_process_next_syllable(const WCHAR *input, unsigned int cChar,
|
|
unsigned int start, unsigned int *main, unsigned int next, lexical_function lex)
|
|
{
|
|
if (lex(input[next])==lex_Vowel)
|
|
{
|
|
*main = next;
|
|
return parse_vowel_syllable(input, cChar, start, next+1, lex);
|
|
}
|
|
else if ((cChar > next+3) && lex(input[next]) == lex_Ra && lex(input[next+1]) == lex_Halant && lex(input[next+2]) == lex_Vowel)
|
|
{
|
|
*main = next+2;
|
|
return parse_vowel_syllable(input, cChar, start, next+3, lex);
|
|
}
|
|
|
|
else if (start == next && lex(input[next])==lex_NBSP)
|
|
{
|
|
*main = next;
|
|
return parse_vowel_syllable(input, cChar, start, next+1, lex);
|
|
}
|
|
else if (start == next && (cChar > next+3) && lex(input[next]) == lex_Ra && lex(input[next+1]) == lex_Halant && lex(input[next+2]) == lex_NBSP)
|
|
{
|
|
*main = next+2;
|
|
return parse_vowel_syllable(input, cChar, start, next+3, lex);
|
|
}
|
|
|
|
return parse_consonant_syllable(input, cChar, start, main, next, lex);
|
|
}
|
|
|
|
static BOOL Consonant_is_post_base_form(HDC hdc, SCRIPT_ANALYSIS *psa, ScriptCache *psc,
|
|
const WCHAR *pwChar, const IndicSyllable *s, lexical_function lexical, BOOL modern)
|
|
{
|
|
if (is_consonant(lexical(pwChar[s->base])) && s->base > s->start && lexical(pwChar[s->base-1]) == lex_Halant)
|
|
{
|
|
if (modern)
|
|
return (SHAPE_does_GSUB_feature_apply_to_chars(hdc, psa, psc, &pwChar[s->base-1], 1, 2, "pstf") > 0);
|
|
else
|
|
{
|
|
WCHAR cc[2];
|
|
cc[0] = pwChar[s->base];
|
|
cc[1] = pwChar[s->base-1];
|
|
return (SHAPE_does_GSUB_feature_apply_to_chars(hdc, psa, psc, cc, 1, 2, "pstf") > 0);
|
|
}
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
static BOOL Consonant_is_below_base_form(HDC hdc, SCRIPT_ANALYSIS *psa, ScriptCache *psc,
|
|
const WCHAR *pwChar, const IndicSyllable *s, lexical_function lexical, BOOL modern)
|
|
{
|
|
if (is_consonant(lexical(pwChar[s->base])) && s->base > s->start && lexical(pwChar[s->base-1]) == lex_Halant)
|
|
{
|
|
if (modern)
|
|
return (SHAPE_does_GSUB_feature_apply_to_chars(hdc, psa, psc, &pwChar[s->base-1], 1, 2, "blwf") > 0);
|
|
else
|
|
{
|
|
WCHAR cc[2];
|
|
cc[0] = pwChar[s->base];
|
|
cc[1] = pwChar[s->base-1];
|
|
return (SHAPE_does_GSUB_feature_apply_to_chars(hdc, psa, psc, cc, 1, 2, "blwf") > 0);
|
|
}
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
static BOOL Consonant_is_pre_base_form(HDC hdc, SCRIPT_ANALYSIS *psa, ScriptCache *psc,
|
|
const WCHAR *pwChar, const IndicSyllable *s, lexical_function lexical, BOOL modern)
|
|
{
|
|
if (is_consonant(lexical(pwChar[s->base])) && s->base > s->start && lexical(pwChar[s->base-1]) == lex_Halant)
|
|
{
|
|
if (modern)
|
|
return (SHAPE_does_GSUB_feature_apply_to_chars(hdc, psa, psc, &pwChar[s->base-1], 1, 2, "pref") > 0);
|
|
else
|
|
{
|
|
WCHAR cc[2];
|
|
cc[0] = pwChar[s->base];
|
|
cc[1] = pwChar[s->base-1];
|
|
return (SHAPE_does_GSUB_feature_apply_to_chars(hdc, psa, psc, cc, 1, 2, "pref") > 0);
|
|
}
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
static BOOL Consonant_is_ralf(HDC hdc, SCRIPT_ANALYSIS *psa, ScriptCache *psc,
|
|
const WCHAR *pwChar, const IndicSyllable *s, lexical_function lexical)
|
|
{
|
|
if ((lexical(pwChar[s->start])==lex_Ra) && s->end > s->start && lexical(pwChar[s->start+1]) == lex_Halant)
|
|
return (SHAPE_does_GSUB_feature_apply_to_chars(hdc, psa, psc, &pwChar[s->start], 1, 2, "rphf") > 0);
|
|
return FALSE;
|
|
}
|
|
|
|
static int FindBaseConsonant(HDC hdc, SCRIPT_ANALYSIS *psa, ScriptCache *psc,
|
|
const WCHAR *input, IndicSyllable *s, lexical_function lex, BOOL modern)
|
|
{
|
|
int i;
|
|
BOOL blwf = FALSE;
|
|
BOOL pref = FALSE;
|
|
|
|
/* remove ralf from consideration */
|
|
if (Consonant_is_ralf(hdc, psa, psc, input, s, lex))
|
|
{
|
|
s->ralf = s->start;
|
|
s->start+=2;
|
|
}
|
|
|
|
/* try to find a base consonant */
|
|
if (!is_consonant( lex(input[s->base]) ))
|
|
{
|
|
for (i = s->end; i >= s->start; i--)
|
|
if (is_consonant( lex(input[i]) ))
|
|
{
|
|
s->base = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
while ((blwf = Consonant_is_below_base_form(hdc, psa, psc, input, s, lex, modern)) || Consonant_is_post_base_form(hdc, psa, psc, input, s, lex, modern) || (pref = Consonant_is_pre_base_form(hdc, psa, psc, input, s, lex, modern)))
|
|
{
|
|
if (blwf && s->blwf == -1)
|
|
s->blwf = s->base - 1;
|
|
if (pref && s->pref == -1)
|
|
s->pref = s->base - 1;
|
|
|
|
for (i = s->base-1; i >= s->start; i--)
|
|
if (is_consonant( lex(input[i]) ))
|
|
{
|
|
s->base = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (s->ralf >= 0)
|
|
s->start = s->ralf;
|
|
|
|
if (s->ralf == s->base)
|
|
s->ralf = -1;
|
|
|
|
return s->base;
|
|
}
|
|
|
|
void Indic_ParseSyllables(HDC hdc, SCRIPT_ANALYSIS *psa, ScriptCache *psc, const WCHAR *input, unsigned int cChar,
|
|
IndicSyllable **syllables, int *syllable_count, lexical_function lex, BOOL modern)
|
|
{
|
|
unsigned int center = 0;
|
|
int index = 0;
|
|
int next = 0;
|
|
|
|
*syllable_count = 0;
|
|
|
|
if (!lex)
|
|
{
|
|
ERR("Failure to have required functions\n");
|
|
return;
|
|
}
|
|
|
|
debug_output_string(input, cChar, lex);
|
|
while (next != -1)
|
|
{
|
|
while((next < cChar) && lex(input[next]) == lex_Generic)
|
|
next++;
|
|
index = next;
|
|
if (next >= cChar)
|
|
break;
|
|
next = Indic_process_next_syllable(input, cChar, 0, ¢er, index, lex);
|
|
if (next != -1)
|
|
{
|
|
if (*syllable_count)
|
|
*syllables = HeapReAlloc(GetProcessHeap(),0,*syllables, sizeof(IndicSyllable)*(*syllable_count+1));
|
|
else
|
|
*syllables = heap_alloc(sizeof(**syllables));
|
|
(*syllables)[*syllable_count].start = index;
|
|
(*syllables)[*syllable_count].base = center;
|
|
(*syllables)[*syllable_count].ralf = -1;
|
|
(*syllables)[*syllable_count].blwf = -1;
|
|
(*syllables)[*syllable_count].pref = -1;
|
|
(*syllables)[*syllable_count].end = next-1;
|
|
FindBaseConsonant(hdc, psa, psc, input, &(*syllables)[*syllable_count], lex, modern);
|
|
index = next;
|
|
*syllable_count = (*syllable_count)+1;
|
|
}
|
|
else if (index < cChar)
|
|
{
|
|
TRACE("Processing failed at %i\n",index);
|
|
next = ++index;
|
|
}
|
|
}
|
|
TRACE("Processed %i of %i characters into %i syllables\n",index,cChar,*syllable_count);
|
|
}
|
|
|
|
void Indic_ReorderCharacters(HDC hdc, SCRIPT_ANALYSIS *psa, ScriptCache *psc, WCHAR *input, unsigned int cChar,
|
|
IndicSyllable **syllables, int *syllable_count, lexical_function lex, reorder_function reorder_f, BOOL modern)
|
|
{
|
|
int i;
|
|
|
|
if (!reorder_f)
|
|
{
|
|
ERR("Failure to have required functions\n");
|
|
return;
|
|
}
|
|
|
|
Indic_ParseSyllables(hdc, psa, psc, input, cChar, syllables, syllable_count, lex, modern);
|
|
for (i = 0; i < *syllable_count; i++)
|
|
reorder_f(input, &(*syllables)[i], lex);
|
|
}
|