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 part: Haluk AKIN <halukakin@gmail.com>
22 *
23 */
24 /*
25 * The source code included in this files was separated from mbfilter_ru.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_cp1254.h"
36 #include "unicode_table_cp1254.h"
37
38 static int mbfl_filt_ident_cp1254(int c, mbfl_identify_filter *filter);
39
40 static const char *mbfl_encoding_cp1254_aliases[] = {"CP1254", "CP-1254", "WINDOWS-1254", NULL};
41
42 const mbfl_encoding mbfl_encoding_cp1254 = {
43 mbfl_no_encoding_cp1254,
44 "Windows-1254",
45 "Windows-1254",
46 (const char *(*)[])&mbfl_encoding_cp1254_aliases,
47 NULL,
48 MBFL_ENCTYPE_SBCS,
49 &vtbl_cp1254_wchar,
50 &vtbl_wchar_cp1254
51 };
52
53 const struct mbfl_identify_vtbl vtbl_identify_cp1254 = {
54 mbfl_no_encoding_cp1254,
55 mbfl_filt_ident_common_ctor,
56 mbfl_filt_ident_common_dtor,
57 mbfl_filt_ident_cp1254
58 };
59
60 const struct mbfl_convert_vtbl vtbl_cp1254_wchar = {
61 mbfl_no_encoding_cp1254,
62 mbfl_no_encoding_wchar,
63 mbfl_filt_conv_common_ctor,
64 mbfl_filt_conv_common_dtor,
65 mbfl_filt_conv_cp1254_wchar,
66 mbfl_filt_conv_common_flush
67 };
68
69 const struct mbfl_convert_vtbl vtbl_wchar_cp1254 = {
70 mbfl_no_encoding_wchar,
71 mbfl_no_encoding_cp1254,
72 mbfl_filt_conv_common_ctor,
73 mbfl_filt_conv_common_dtor,
74 mbfl_filt_conv_wchar_cp1254,
75 mbfl_filt_conv_common_flush
76 };
77
78 #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
79
80 /*
81 * wchar => cp1254
82 */
83 int
mbfl_filt_conv_wchar_cp1254(int c,mbfl_convert_filter * filter)84 mbfl_filt_conv_wchar_cp1254(int c, mbfl_convert_filter *filter)
85 {
86 int s, n;
87
88 if (c < 0x80) {
89 s = c;
90 } else {
91 s = -1;
92 n = cp1254_ucs_table_len-1;
93 while (n >= 0) {
94 if (c == cp1254_ucs_table[n] && c != 0xfffe) {
95 s = cp1254_ucs_table_min + n;
96 break;
97 }
98 n--;
99 }
100 if (s <= 0 && (c & ~MBFL_WCSPLANE_MASK) == MBFL_WCSPLANE_CP1254) {
101 s = c & MBFL_WCSPLANE_MASK;
102 }
103 }
104
105 if (s >= 0) {
106 CK((*filter->output_function)(s, filter->data));
107 } else {
108 if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
109 CK(mbfl_filt_conv_illegal_output(c, filter));
110 }
111 }
112
113 return c;
114 }
115
116 /*
117 * cp1254 => wchar
118 */
119 int
mbfl_filt_conv_cp1254_wchar(int c,mbfl_convert_filter * filter)120 mbfl_filt_conv_cp1254_wchar(int c, mbfl_convert_filter *filter)
121 {
122 int s;
123
124 if (c >= 0 && c < cp1254_ucs_table_min) {
125 s = c;
126 } else if (c >= cp1254_ucs_table_min && c < 0x100) {
127 s = cp1254_ucs_table[c - cp1254_ucs_table_min];
128 if (s <= 0) {
129 s = c;
130 s &= MBFL_WCSPLANE_MASK;
131 s |= MBFL_WCSPLANE_CP1254;
132 }
133 } else {
134 s = c;
135 s &= MBFL_WCSGROUP_MASK;
136 s |= MBFL_WCSGROUP_THROUGH;
137 }
138
139 CK((*filter->output_function)(s, filter->data));
140
141 return c;
142 }
143
144 /* We only distinguish the MS extensions to ISO-8859-1.
145 * Actually, this is pretty much a NO-OP, since the identification
146 * system doesn't allow us to discriminate between a positive match,
147 * a possible match and a definite non-match.
148 * The problem here is that cp1254 looks like SJIS for certain chars.
149 * */
mbfl_filt_ident_cp1254(int c,mbfl_identify_filter * filter)150 static int mbfl_filt_ident_cp1254(int c, mbfl_identify_filter *filter)
151 {
152 if (c >= 0x80 && c < 0xff)
153 filter->flag = 0;
154 else
155 filter->flag = 1; /* not it */
156 return c;
157 }
158
