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/* FriBidi - Library of BiDi algorithm
* Copyright (C) 1999,2000 Dov Grobgeld, and
* Copyright (C) 2001 Behdad Esfahbod.
*
* 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, in a file named COPYING.LIB; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA
*
* For licensing issues, contact <dov@imagic.weizmann.ac.il> and
* <fwpg@sharif.edu>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <glib.h>
#include "pango/pango-utils.h"
#include "fribidi_types.h"
#include "fribidi_tables.i"
#ifdef MEM_OPTIMIZED
extern FriBidiCharType prop_to_type[];
#endif
/*======================================================================
* fribidi_get_type() returns the bidi type of a character.
*----------------------------------------------------------------------*/
FriBidiCharType
_pango_fribidi_get_type(FriBidiChar uch)
{
FriBidiPropCharType *block;
int i = uch % 256, j = uch / 256;
if (j >= 256)
return FRIBIDI_TYPE_LTR;
block = FriBidiPropertyBlocks[j];
if (block)
#ifdef MEM_OPTIMIZED
return prop_to_type[block[i]];
#else
return block[i];
#endif
else
{
switch (j)
{
case 0x05:
if (i >= 0x90)
return FRIBIDI_TYPE_RTL;
else
break;
case 0xFB:
if (i >= 0x50)
return FRIBIDI_TYPE_AL;
else if (i >= 0x1D)
return FRIBIDI_TYPE_RTL;
else
break;
case 0x06:
case 0xFC:
case 0xFD:
return FRIBIDI_TYPE_AL;
case 0x07:
if (i <= 0xBF)
return FRIBIDI_TYPE_AL;
else
break;
case 0xFE:
if (i >= 0x70)
return FRIBIDI_TYPE_AL;
else
break;
}
return FRIBIDI_TYPE_LTR;
}
}
gboolean
pango_get_mirror_char ( /* Input */
FriBidiChar ch,
/* Output */
FriBidiChar * mirrored_ch)
{
int pos, step;
gboolean found;
pos = step = (nFriBidiMirroredChars / 2) + 1;
while (step > 1)
{
FriBidiChar cmp_ch = FriBidiMirroredChars[pos].ch;
step = (step + 1) / 2;
if (cmp_ch < ch)
{
pos += step;
if (pos > nFriBidiMirroredChars - 1)
pos = nFriBidiMirroredChars - 1;
}
else if (cmp_ch > ch)
{
pos -= step;
if (pos < 0)
pos = 0;
}
else
break;
}
if (FriBidiMirroredChars[pos].ch == ch)
{
*mirrored_ch = FriBidiMirroredChars[pos].mirrored_ch;
found = TRUE;
}
else
{
*mirrored_ch = ch;
found = FALSE;
}
return found;
}
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