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_koi8r.h"
36 #include "unicode_table_koi8r.h"
37
38 static int mbfl_filt_ident_koi8r(int c, mbfl_identify_filter *filter);
39
40 static const char *mbfl_encoding_koi8r_aliases[] = {"KOI8-R", "KOI8R", NULL};
41
42 const mbfl_encoding mbfl_encoding_koi8r = {
43 mbfl_no_encoding_koi8r,
44 "KOI8-R",
45 "KOI8-R",
46 (const char *(*)[])&mbfl_encoding_koi8r_aliases,
47 NULL,
48 MBFL_ENCTYPE_SBCS,
49 &vtbl_koi8r_wchar,
50 &vtbl_wchar_koi8r
51 };
52
53 const struct mbfl_identify_vtbl vtbl_identify_koi8r = {
54 mbfl_no_encoding_koi8r,
55 mbfl_filt_ident_common_ctor,
56 mbfl_filt_ident_common_dtor,
57 mbfl_filt_ident_koi8r
58 };
59
60 const struct mbfl_convert_vtbl vtbl_wchar_koi8r = {
61 mbfl_no_encoding_wchar,
62 mbfl_no_encoding_koi8r,
63 mbfl_filt_conv_common_ctor,
64 mbfl_filt_conv_common_dtor,
65 mbfl_filt_conv_wchar_koi8r,
66 mbfl_filt_conv_common_flush
67 };
68
69 const struct mbfl_convert_vtbl vtbl_koi8r_wchar = {
70 mbfl_no_encoding_koi8r,
71 mbfl_no_encoding_wchar,
72 mbfl_filt_conv_common_ctor,
73 mbfl_filt_conv_common_dtor,
74 mbfl_filt_conv_koi8r_wchar,
75 mbfl_filt_conv_common_flush
76 };
77
78 #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
79
80 /*
81 * koi8r => wchar
82 */
83 int
mbfl_filt_conv_koi8r_wchar(int c,mbfl_convert_filter * filter)84 mbfl_filt_conv_koi8r_wchar(int c, mbfl_convert_filter *filter)
85 {
86 int s;
87
88 if (c >= 0 && c < koi8r_ucs_table_min) {
89 s = c;
90 } else if (c >= koi8r_ucs_table_min && c < 0x100) {
91 s = koi8r_ucs_table[c - koi8r_ucs_table_min];
92 if (s <= 0) {
93 s = c;
94 s &= MBFL_WCSPLANE_MASK;
95 s |= MBFL_WCSPLANE_KOI8R;
96 }
97 } else {
98 s = c;
99 s &= MBFL_WCSGROUP_MASK;
100 s |= MBFL_WCSGROUP_THROUGH;
101 }
102
103 CK((*filter->output_function)(s, filter->data));
104
105 return c;
106 }
107
108 /*
109 * wchar => koi8r
110 */
111 int
mbfl_filt_conv_wchar_koi8r(int c,mbfl_convert_filter * filter)112 mbfl_filt_conv_wchar_koi8r(int c, mbfl_convert_filter *filter)
113 {
114 int s, n;
115
116 if (c < 0x80) {
117 s = c;
118 } else {
119 s = -1;
120 n = koi8r_ucs_table_len-1;
121 while (n >= 0) {
122 if (c == koi8r_ucs_table[n]) {
123 s = koi8r_ucs_table_min + n;
124 break;
125 }
126 n--;
127 }
128 if (s <= 0 && (c & ~MBFL_WCSPLANE_MASK) == MBFL_WCSPLANE_KOI8R) {
129 s = c & MBFL_WCSPLANE_MASK;
130 }
131 }
132
133 if (s >= 0) {
134 CK((*filter->output_function)(s, filter->data));
135 } else {
136 CK(mbfl_filt_conv_illegal_output(c, filter));
137 }
138
139 return c;
140 }
141
mbfl_filt_ident_koi8r(int c,mbfl_identify_filter * filter)142 static int mbfl_filt_ident_koi8r(int c, mbfl_identify_filter *filter)
143 {
144 if (c >= 0x80 && c < 0xff)
145 filter->flag = 0;
146 else
147 filter->flag = 1; /* not it */
148 return c;
149 }
150
