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
82 : mbfl_filt_conv_cp1251_wchar(int c, mbfl_convert_filter *filter)
83 0 : {
84 : int s;
85 :
86 0 : if (c >= 0 && c < cp1251_ucs_table_min) {
87 0 : s = c;
88 0 : } else if (c >= cp1251_ucs_table_min && c < 0x100) {
89 0 : s = cp1251_ucs_table[c - cp1251_ucs_table_min];
90 0 : if (s <= 0) {
91 0 : s = c;
92 0 : s &= MBFL_WCSPLANE_MASK;
93 0 : s |= MBFL_WCSPLANE_CP1251;
94 : }
95 : } else {
96 0 : s = c;
97 0 : s &= MBFL_WCSGROUP_MASK;
98 0 : s |= MBFL_WCSGROUP_THROUGH;
99 : }
100 :
101 0 : CK((*filter->output_function)(s, filter->data));
102 :
103 0 : return c;
104 : }
105 :
106 : /*
107 : * wchar => cp1251
108 : */
109 : int
110 : mbfl_filt_conv_wchar_cp1251(int c, mbfl_convert_filter *filter)
111 0 : {
112 : int s, n;
113 :
114 0 : if (c < 0x80) {
115 0 : s = c;
116 : } else {
117 0 : s = -1;
118 0 : n = cp1251_ucs_table_len-1;
119 0 : while (n >= 0) {
120 0 : if (c == cp1251_ucs_table[n]) {
121 0 : s = cp1251_ucs_table_min + n;
122 0 : break;
123 : }
124 0 : n--;
125 : }
126 0 : if (s <= 0 && (c & ~MBFL_WCSPLANE_MASK) == MBFL_WCSPLANE_CP1251) {
127 0 : s = c & MBFL_WCSPLANE_MASK;
128 : }
129 : }
130 :
131 0 : if (s >= 0) {
132 0 : CK((*filter->output_function)(s, filter->data));
133 : } else {
134 0 : if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
135 0 : CK(mbfl_filt_conv_illegal_output(c, filter));
136 : }
137 : }
138 :
139 0 : return c;
140 : }
141 :
142 : /* all of this is so ugly now! */
143 : static int mbfl_filt_ident_cp1251(int c, mbfl_identify_filter *filter)
144 0 : {
145 0 : if (c >= 0x80 && c < 0xff)
146 0 : filter->flag = 0;
147 : else
148 0 : filter->flag = 1; /* not it */
149 0 : return c;
150 : }
151 :
152 :
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