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 &vtbl_koi8u_wchar,
47 &vtbl_wchar_koi8u
48 };
49
50 const struct mbfl_identify_vtbl vtbl_identify_koi8u = {
51 mbfl_no_encoding_koi8u,
52 mbfl_filt_ident_common_ctor,
53 mbfl_filt_ident_common_dtor,
54 mbfl_filt_ident_koi8u
55 };
56
57 const struct mbfl_convert_vtbl vtbl_wchar_koi8u = {
58 mbfl_no_encoding_wchar,
59 mbfl_no_encoding_koi8u,
60 mbfl_filt_conv_common_ctor,
61 mbfl_filt_conv_common_dtor,
62 mbfl_filt_conv_wchar_koi8u,
63 mbfl_filt_conv_common_flush
64 };
65
66 const struct mbfl_convert_vtbl vtbl_koi8u_wchar = {
67 mbfl_no_encoding_koi8u,
68 mbfl_no_encoding_wchar,
69 mbfl_filt_conv_common_ctor,
70 mbfl_filt_conv_common_dtor,
71 mbfl_filt_conv_koi8u_wchar,
72 mbfl_filt_conv_common_flush
73 };
74
75 #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
76
77 /*
78 * koi8u => wchar
79 */
80 int
mbfl_filt_conv_koi8u_wchar(int c,mbfl_convert_filter * filter)81 mbfl_filt_conv_koi8u_wchar(int c, mbfl_convert_filter *filter)
82 {
83 int s;
84
85 if (c >= 0 && c < koi8u_ucs_table_min) {
86 s = c;
87 } else if (c >= koi8u_ucs_table_min && c < 0x100) {
88 s = koi8u_ucs_table[c - koi8u_ucs_table_min];
89 if (s <= 0) {
90 s = c;
91 s &= MBFL_WCSPLANE_MASK;
92 s |= MBFL_WCSPLANE_KOI8U;
93 }
94 } else {
95 s = c;
96 s &= MBFL_WCSGROUP_MASK;
97 s |= MBFL_WCSGROUP_THROUGH;
98 }
99
100 CK((*filter->output_function)(s, filter->data));
101
102 return c;
103 }
104
105 /*
106 * wchar => koi8u
107 */
108 int
mbfl_filt_conv_wchar_koi8u(int c,mbfl_convert_filter * filter)109 mbfl_filt_conv_wchar_koi8u(int c, mbfl_convert_filter *filter)
110 {
111 int s, n;
112
113 if (c < 0x80) {
114 s = c;
115 } else {
116 s = -1;
117 n = koi8u_ucs_table_len-1;
118 while (n >= 0) {
119 if (c == koi8u_ucs_table[n]) {
120 s = koi8u_ucs_table_min + n;
121 break;
122 }
123 n--;
124 }
125 if (s <= 0 && (c & ~MBFL_WCSPLANE_MASK) == MBFL_WCSPLANE_KOI8U) {
126 s = c & MBFL_WCSPLANE_MASK;
127 }
128 }
129
130 if (s >= 0) {
131 CK((*filter->output_function)(s, filter->data));
132 } else {
133 CK(mbfl_filt_conv_illegal_output(c, filter));
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
