1 : /*
2 : * "streamable kanji code filter and converter"
3 : * Copyright (c) 1998-2002 HappySize, Inc. All rights reserved.
4 : *
5 : * LICENSE NOTICES
6 : *
7 : * This file is part of "streamable kanji code filter and converter",
8 : * which is distributed under the terms of GNU Lesser General Public
9 : * License (version 2) as published by the Free Software Foundation.
10 : *
11 : * This software is distributed in the hope that it will be useful,
12 : * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 : * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 : * GNU Lesser General Public License for more details.
15 : *
16 : * You should have received a copy of the GNU Lesser General Public
17 : * License along with "streamable kanji code filter and converter";
18 : * if not, write to the Free Software Foundation, Inc., 59 Temple Place,
19 : * Suite 330, Boston, MA 02111-1307 USA
20 : *
21 : * The author of this file:
22 : *
23 : */
24 : /*
25 : * The source code included in this files was separated from mbfilter.c
26 : * by moriyoshi koizumi <moriyoshi@php.net> on 4 dec 2002.
27 : *
28 : */
29 :
30 : #ifdef HAVE_CONFIG_H
31 : #include "config.h"
32 : #endif
33 :
34 : #include "mbfilter.h"
35 : #include "mbfilter_iso8859_4.h"
36 : #include "unicode_table_iso8859_4.h"
37 :
38 : static const char *mbfl_encoding_8859_4_aliases[] = {"ISO_8859-4", "latin4", NULL};
39 :
40 : const mbfl_encoding mbfl_encoding_8859_4 = {
41 : mbfl_no_encoding_8859_4,
42 : "ISO-8859-4",
43 : "ISO-8859-4",
44 : (const char *(*)[])&mbfl_encoding_8859_4_aliases,
45 : NULL,
46 : MBFL_ENCTYPE_SBCS
47 : };
48 :
49 : const struct mbfl_identify_vtbl vtbl_identify_8859_4 = {
50 : mbfl_no_encoding_8859_4,
51 : mbfl_filt_ident_common_ctor,
52 : mbfl_filt_ident_common_dtor,
53 : mbfl_filt_ident_true };
54 :
55 : const struct mbfl_convert_vtbl vtbl_8859_4_wchar = {
56 : mbfl_no_encoding_8859_4,
57 : mbfl_no_encoding_wchar,
58 : mbfl_filt_conv_common_ctor,
59 : mbfl_filt_conv_common_dtor,
60 : mbfl_filt_conv_8859_4_wchar,
61 : mbfl_filt_conv_common_flush
62 : };
63 :
64 : const struct mbfl_convert_vtbl vtbl_wchar_8859_4 = {
65 : mbfl_no_encoding_wchar,
66 : mbfl_no_encoding_8859_4,
67 : mbfl_filt_conv_common_ctor,
68 : mbfl_filt_conv_common_dtor,
69 : mbfl_filt_conv_wchar_8859_4,
70 : mbfl_filt_conv_common_flush
71 : };
72 :
73 : #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
74 :
75 : /*
76 : * ISO-8859-4 => wchar
77 : */
78 : int mbfl_filt_conv_8859_4_wchar(int c, mbfl_convert_filter *filter)
79 0 : {
80 : int s;
81 :
82 0 : if (c >= 0 && c < 0xa0) {
83 0 : s = c;
84 0 : } else if (c >= 0xa0 && c < 0x100) {
85 0 : s = iso8859_4_ucs_table[c - 0xa0];
86 0 : if (s <= 0) {
87 0 : s = c;
88 0 : s &= MBFL_WCSPLANE_MASK;
89 0 : s |= MBFL_WCSPLANE_8859_4;
90 : }
91 : } else {
92 0 : s = c;
93 0 : s &= MBFL_WCSGROUP_MASK;
94 0 : s |= MBFL_WCSGROUP_THROUGH;
95 : }
96 :
97 0 : CK((*filter->output_function)(s, filter->data));
98 :
99 0 : return c;
100 : }
101 :
102 : /*
103 : * wchar => ISO-8859-4
104 : */
105 : int mbfl_filt_conv_wchar_8859_4(int c, mbfl_convert_filter *filter)
106 0 : {
107 : int s, n;
108 :
109 0 : if (c >= 0 && c < 0xa0) {
110 0 : s = c;
111 : } else {
112 0 : s = -1;
113 0 : n = 95;
114 0 : while (n >= 0) {
115 0 : if (c == iso8859_4_ucs_table[n]) {
116 0 : s = 0xa0 + n;
117 0 : break;
118 : }
119 0 : n--;
120 : }
121 0 : if (s <= 0 && (c & ~MBFL_WCSPLANE_MASK) == MBFL_WCSPLANE_8859_4) {
122 0 : s = c & MBFL_WCSPLANE_MASK;
123 : }
124 : }
125 :
126 0 : if (s >= 0) {
127 0 : CK((*filter->output_function)(s, filter->data));
128 : } else {
129 0 : if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
130 0 : CK(mbfl_filt_conv_illegal_output(c, filter));
131 : }
132 : }
133 :
134 0 : return c;
135 : }
136 :
137 :
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