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91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
/* fribidi-mirroring.c - get mirrored character
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*
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* Copyright (C) 2004 Sharif FarsiWeb, Inc
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* Copyright (C) 2001, 2002, 2004 Behdad Esfahbod
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* Copyright (C) 1999, 2000, 2017 Dov Grobgeld
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*
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* This file is part of GNU FriBidi.
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*
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* GNU FriBidi is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1
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* of the License, or (at your option) any later version.
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*
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* GNU FriBidi is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with GNU FriBidi; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* For licensing issues, contact <fribidi.license@gmail.com> or write to
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* Sharif FarsiWeb, Inc., PO Box 13445-389, Tehran, Iran.
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*
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* Author(s):
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* Behdad Esfahbod, 2001, 2002, 2004
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* Dov Grobgeld, 1999, 2000
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*/
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#include "common.h"
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#include <fribidi-mirroring.h>
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#include "mirroring.tab.i"
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FRIBIDI_ENTRY fribidi_boolean
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fribidi_get_mirror_char (
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/* input */
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FriBidiChar ch,
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/* output */
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FriBidiChar *mirrored_ch
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)
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{
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register FriBidiChar result;
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result = FRIBIDI_GET_MIRRORING (ch);
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if (mirrored_ch)
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*mirrored_ch = result;
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return ch != result ? true : false;
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}
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FRIBIDI_ENTRY void
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fribidi_shape_mirroring (
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/* input */
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const FriBidiLevel *embedding_levels,
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const FriBidiStrIndex len,
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/* input and output */
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FriBidiChar *str
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)
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{
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register FriBidiStrIndex i;
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DBG ("in fribidi_shape_mirroring");
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if UNLIKELY
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(len == 0 || !str) return;
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fribidi_assert (embedding_levels);
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/* L4. Mirror all characters that are in odd levels and have mirrors. */
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for (i = len - 1; i >= 0; i--)
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if (FRIBIDI_LEVEL_IS_RTL (embedding_levels[i]))
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{
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FriBidiChar mirrored_ch;
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if (fribidi_get_mirror_char (str[i], &mirrored_ch))
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str[i] = mirrored_ch;
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}
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}
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/* Editor directions:
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* Local Variables:
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* mode: c
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* c-basic-offset: 2
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* indent-tabs-mode: t
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* tab-width: 8
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* End:
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* vim: textwidth=78: autoindent: cindent: shiftwidth=2: tabstop=8:
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*/
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