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/* fribidi-mirroring.c - get mirrored character
*
* Copyright (C) 2004 Sharif FarsiWeb, Inc
* Copyright (C) 2001, 2002, 2004 Behdad Esfahbod
* Copyright (C) 1999, 2000, 2017 Dov Grobgeld
*
* This file is part of GNU FriBidi.
*
* GNU FriBidi 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.
*
* GNU FriBidi 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 GNU FriBidi; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* For licensing issues, contact <fribidi.license@gmail.com> or write to
* Sharif FarsiWeb, Inc., PO Box 13445-389, Tehran, Iran.
*
* Author(s):
* Behdad Esfahbod, 2001, 2002, 2004
* Dov Grobgeld, 1999, 2000
*/
#include "common.h"
#include <fribidi-mirroring.h>
#include "mirroring.tab.i"
FRIBIDI_ENTRY fribidi_boolean
fribidi_get_mirror_char (
/* input */
FriBidiChar ch,
/* output */
FriBidiChar *mirrored_ch
)
{
register FriBidiChar result;
result = FRIBIDI_GET_MIRRORING (ch);
if (mirrored_ch)
*mirrored_ch = result;
return ch != result ? true : false;
}
FRIBIDI_ENTRY void
fribidi_shape_mirroring (
/* input */
const FriBidiLevel *embedding_levels,
const FriBidiStrIndex len,
/* input and output */
FriBidiChar *str
)
{
register FriBidiStrIndex i;
DBG ("in fribidi_shape_mirroring");
if UNLIKELY
(len == 0 || !str) return;
fribidi_assert (embedding_levels);
/* L4. Mirror all characters that are in odd levels and have mirrors. */
for (i = len - 1; i >= 0; i--)
if (FRIBIDI_LEVEL_IS_RTL (embedding_levels[i]))
{
FriBidiChar mirrored_ch;
if (fribidi_get_mirror_char (str[i], &mirrored_ch))
str[i] = mirrored_ch;
}
}
/* Editor directions:
* Local Variables:
* mode: c
* c-basic-offset: 2
* indent-tabs-mode: t
* tab-width: 8
* End:
* vim: textwidth=78: autoindent: cindent: shiftwidth=2: tabstop=8:
*/
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