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: Maksym Veremeyenko <verem@m1.tv>
22 *
23 * Based on mbfilter_koi8r.c code
24 *
25 */
26
27 #ifdef HAVE_CONFIG_H
28 #include "config.h"
29 #endif
30
31 #include "mbfilter.h"
32 #include "mbfilter_koi8u.h"
33 #include "unicode_table_koi8u.h"
34
35 static int mbfl_filt_ident_koi8u(int c, mbfl_identify_filter *filter);
36
37 static const char *mbfl_encoding_koi8u_aliases[] = {"KOI8-U", "KOI8U", NULL};
38
39 const mbfl_encoding mbfl_encoding_koi8u = {
40 mbfl_no_encoding_koi8u,
41 "KOI8-U",
42 "KOI8-U",
43 (const char *(*)[])&mbfl_encoding_koi8u_aliases,
44 NULL,
45 MBFL_ENCTYPE_SBCS
46 };
47
48 const struct mbfl_identify_vtbl vtbl_identify_koi8u = {
49 mbfl_no_encoding_koi8u,
50 mbfl_filt_ident_common_ctor,
51 mbfl_filt_ident_common_dtor,
52 mbfl_filt_ident_koi8u
53 };
54
55 const struct mbfl_convert_vtbl vtbl_wchar_koi8u = {
56 mbfl_no_encoding_wchar,
57 mbfl_no_encoding_koi8u,
58 mbfl_filt_conv_common_ctor,
59 mbfl_filt_conv_common_dtor,
60 mbfl_filt_conv_wchar_koi8u,
61 mbfl_filt_conv_common_flush
62 };
63
64 const struct mbfl_convert_vtbl vtbl_koi8u_wchar = {
65 mbfl_no_encoding_koi8u,
66 mbfl_no_encoding_wchar,
67 mbfl_filt_conv_common_ctor,
68 mbfl_filt_conv_common_dtor,
69 mbfl_filt_conv_koi8u_wchar,
70 mbfl_filt_conv_common_flush
71 };
72
73 #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
74
75 /*
76 * koi8u => wchar
77 */
78 int
mbfl_filt_conv_koi8u_wchar(int c,mbfl_convert_filter * filter)79 mbfl_filt_conv_koi8u_wchar(int c, mbfl_convert_filter *filter)
80 {
81 int s;
82
83 if (c >= 0 && c < koi8u_ucs_table_min) {
84 s = c;
85 } else if (c >= koi8u_ucs_table_min && c < 0x100) {
86 s = koi8u_ucs_table[c - koi8u_ucs_table_min];
87 if (s <= 0) {
88 s = c;
89 s &= MBFL_WCSPLANE_MASK;
90 s |= MBFL_WCSPLANE_KOI8U;
91 }
92 } else {
93 s = c;
94 s &= MBFL_WCSGROUP_MASK;
95 s |= MBFL_WCSGROUP_THROUGH;
96 }
97
98 CK((*filter->output_function)(s, filter->data));
99
100 return c;
101 }
102
103 /*
104 * wchar => koi8u
105 */
106 int
mbfl_filt_conv_wchar_koi8u(int c,mbfl_convert_filter * filter)107 mbfl_filt_conv_wchar_koi8u(int c, mbfl_convert_filter *filter)
108 {
109 int s, n;
110
111 if (c < 0x80) {
112 s = c;
113 } else {
114 s = -1;
115 n = koi8u_ucs_table_len-1;
116 while (n >= 0) {
117 if (c == koi8u_ucs_table[n]) {
118 s = koi8u_ucs_table_min + n;
119 break;
120 }
121 n--;
122 }
123 if (s <= 0 && (c & ~MBFL_WCSPLANE_MASK) == MBFL_WCSPLANE_KOI8U) {
124 s = c & MBFL_WCSPLANE_MASK;
125 }
126 }
127
128 if (s >= 0) {
129 CK((*filter->output_function)(s, filter->data));
130 } else {
131 if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
132 CK(mbfl_filt_conv_illegal_output(c, filter));
133 }
134 }
135
136 return c;
137 }
138
mbfl_filt_ident_koi8u(int c,mbfl_identify_filter * filter)139 static int mbfl_filt_ident_koi8u(int c, mbfl_identify_filter *filter)
140 {
141 if (c >= 0x80 && c < 0xff)
142 filter->flag = 0;
143 else
144 filter->flag = 1; /* not it */
145 return c;
146 }
147
