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: Den V. Tsopa <tdv@edisoft.ru>
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_cp1251.h"
36 #include "unicode_table_cp1251.h"
37
38 static int mbfl_filt_ident_cp1251(int c, mbfl_identify_filter *filter);
39
40 static const char *mbfl_encoding_cp1251_aliases[] = {"CP1251", "CP-1251", "WINDOWS-1251", NULL};
41
42 const mbfl_encoding mbfl_encoding_cp1251 = {
43 mbfl_no_encoding_cp1251,
44 "Windows-1251",
45 "Windows-1251",
46 (const char *(*)[])&mbfl_encoding_cp1251_aliases,
47 NULL,
48 MBFL_ENCTYPE_SBCS
49 };
50
51 const struct mbfl_identify_vtbl vtbl_identify_cp1251 = {
52 mbfl_no_encoding_cp1251,
53 mbfl_filt_ident_common_ctor,
54 mbfl_filt_ident_common_dtor,
55 mbfl_filt_ident_cp1251
56 };
57
58 const struct mbfl_convert_vtbl vtbl_wchar_cp1251 = {
59 mbfl_no_encoding_wchar,
60 mbfl_no_encoding_cp1251,
61 mbfl_filt_conv_common_ctor,
62 mbfl_filt_conv_common_dtor,
63 mbfl_filt_conv_wchar_cp1251,
64 mbfl_filt_conv_common_flush
65 };
66
67 const struct mbfl_convert_vtbl vtbl_cp1251_wchar = {
68 mbfl_no_encoding_cp1251,
69 mbfl_no_encoding_wchar,
70 mbfl_filt_conv_common_ctor,
71 mbfl_filt_conv_common_dtor,
72 mbfl_filt_conv_cp1251_wchar,
73 mbfl_filt_conv_common_flush
74 };
75
76 #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
77
78 /*
79 * cp1251 => wchar
80 */
81 int
mbfl_filt_conv_cp1251_wchar(int c,mbfl_convert_filter * filter)82 mbfl_filt_conv_cp1251_wchar(int c, mbfl_convert_filter *filter)
83 {
84 int s;
85
86 if (c >= 0 && c < cp1251_ucs_table_min) {
87 s = c;
88 } else if (c >= cp1251_ucs_table_min && c < 0x100) {
89 s = cp1251_ucs_table[c - cp1251_ucs_table_min];
90 if (s <= 0) {
91 s = c;
92 s &= MBFL_WCSPLANE_MASK;
93 s |= MBFL_WCSPLANE_CP1251;
94 }
95 } else {
96 s = c;
97 s &= MBFL_WCSGROUP_MASK;
98 s |= MBFL_WCSGROUP_THROUGH;
99 }
100
101 CK((*filter->output_function)(s, filter->data));
102
103 return c;
104 }
105
106 /*
107 * wchar => cp1251
108 */
109 int
mbfl_filt_conv_wchar_cp1251(int c,mbfl_convert_filter * filter)110 mbfl_filt_conv_wchar_cp1251(int c, mbfl_convert_filter *filter)
111 {
112 int s, n;
113
114 if (c < 0x80) {
115 s = c;
116 } else {
117 s = -1;
118 n = cp1251_ucs_table_len-1;
119 while (n >= 0) {
120 if (c == cp1251_ucs_table[n]) {
121 s = cp1251_ucs_table_min + n;
122 break;
123 }
124 n--;
125 }
126 if (s <= 0 && (c & ~MBFL_WCSPLANE_MASK) == MBFL_WCSPLANE_CP1251) {
127 s = c & MBFL_WCSPLANE_MASK;
128 }
129 }
130
131 if (s >= 0) {
132 CK((*filter->output_function)(s, filter->data));
133 } else {
134 if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
135 CK(mbfl_filt_conv_illegal_output(c, filter));
136 }
137 }
138
139 return c;
140 }
141
142 /* all of this is so ugly now! */
mbfl_filt_ident_cp1251(int c,mbfl_identify_filter * filter)143 static int mbfl_filt_ident_cp1251(int c, mbfl_identify_filter *filter)
144 {
145 if (c >= 0x80 && c <= 0xff)
146 filter->flag = 0;
147 else
148 filter->flag = 1; /* not it */
149 return c;
150 }
151
