/src/fribidi/lib/fribidi-mirroring.c
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1 | | /* fribidi-mirroring.c - get mirrored character |
2 | | * |
3 | | * Copyright (C) 2004 Sharif FarsiWeb, Inc |
4 | | * Copyright (C) 2001, 2002, 2004 Behdad Esfahbod |
5 | | * Copyright (C) 1999, 2000, 2017 Dov Grobgeld |
6 | | * |
7 | | * This file is part of GNU FriBidi. |
8 | | * |
9 | | * GNU FriBidi is free software; you can redistribute it and/or |
10 | | * modify it under the terms of the GNU Lesser General Public License |
11 | | * as published by the Free Software Foundation; either version 2.1 |
12 | | * of the License, or (at your option) any later version. |
13 | | * |
14 | | * GNU FriBidi is distributed in the hope that it will be useful, |
15 | | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
17 | | * GNU Lesser General Public License for more details. |
18 | | * |
19 | | * You should have received a copy of the GNU Lesser General Public License |
20 | | * along with GNU FriBidi; if not, write to the Free Software |
21 | | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
22 | | * |
23 | | * For licensing issues, contact <fribidi.license@gmail.com> or write to |
24 | | * Sharif FarsiWeb, Inc., PO Box 13445-389, Tehran, Iran. |
25 | | * |
26 | | * Author(s): |
27 | | * Behdad Esfahbod, 2001, 2002, 2004 |
28 | | * Dov Grobgeld, 1999, 2000 |
29 | | */ |
30 | | |
31 | | #include "common.h" |
32 | | |
33 | | #include <fribidi-mirroring.h> |
34 | | |
35 | | #include "mirroring.tab.i" |
36 | | |
37 | | FRIBIDI_ENTRY fribidi_boolean |
38 | | fribidi_get_mirror_char ( |
39 | | /* input */ |
40 | | FriBidiChar ch, |
41 | | /* output */ |
42 | | FriBidiChar *mirrored_ch |
43 | | ) |
44 | 0 | { |
45 | 0 | register FriBidiChar result; |
46 | 0 | result = FRIBIDI_GET_MIRRORING (ch); |
47 | 0 | if (mirrored_ch) |
48 | 0 | *mirrored_ch = result; |
49 | 0 | return ch != result ? true : false; |
50 | 0 | } |
51 | | |
52 | | |
53 | | FRIBIDI_ENTRY void |
54 | | fribidi_shape_mirroring ( |
55 | | /* input */ |
56 | | const FriBidiLevel *embedding_levels, |
57 | | const FriBidiStrIndex len, |
58 | | /* input and output */ |
59 | | FriBidiChar *str |
60 | | ) |
61 | 0 | { |
62 | 0 | register FriBidiStrIndex i; |
63 | |
|
64 | 0 | DBG ("in fribidi_shape_mirroring"); |
65 | |
|
66 | 0 | if UNLIKELY |
67 | 0 | (len == 0 || !str) return; |
68 | | |
69 | 0 | fribidi_assert (embedding_levels); |
70 | | |
71 | | /* L4. Mirror all characters that are in odd levels and have mirrors. */ |
72 | 0 | for (i = len - 1; i >= 0; i--) |
73 | 0 | if (FRIBIDI_LEVEL_IS_RTL (embedding_levels[i])) |
74 | 0 | { |
75 | 0 | FriBidiChar mirrored_ch; |
76 | |
|
77 | 0 | if (fribidi_get_mirror_char (str[i], &mirrored_ch)) |
78 | 0 | str[i] = mirrored_ch; |
79 | 0 | } |
80 | 0 | } |
81 | | |
82 | | /* Editor directions: |
83 | | * Local Variables: |
84 | | * mode: c |
85 | | * c-basic-offset: 2 |
86 | | * indent-tabs-mode: t |
87 | | * tab-width: 8 |
88 | | * End: |
89 | | * vim: textwidth=78: autoindent: cindent: shiftwidth=2: tabstop=8: |
90 | | */ |