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 file: Hayk Chamyan <hamshen@gmail.com>
22 *
23 */
24
25 /*
26 * "armenian code filter and converter"
27 */
28
29 #ifdef HAVE_CONFIG_H
30 #include "config.h"
31 #endif
32
33 #include "mbfilter.h"
34 #include "mbfilter_armscii8.h"
35 #include "unicode_table_armscii8.h"
36
37 static int mbfl_filt_ident_armscii8(int c, mbfl_identify_filter *filter);
38
39 static const char *mbfl_encoding_armscii8_aliases[] = {"ArmSCII-8", "ArmSCII8", "ARMSCII-8", "ARMSCII8", NULL};
40
41 const mbfl_encoding mbfl_encoding_armscii8 = {
42 mbfl_no_encoding_armscii8,
43 "ArmSCII-8",
44 "ArmSCII-8",
45 (const char *(*)[])&mbfl_encoding_armscii8_aliases,
46 NULL,
47 MBFL_ENCTYPE_SBCS
48 };
49
50 const struct mbfl_identify_vtbl vtbl_identify_armscii8 = {
51 mbfl_no_encoding_armscii8,
52 mbfl_filt_ident_common_ctor,
53 mbfl_filt_ident_common_dtor,
54 mbfl_filt_ident_armscii8
55 };
56
57 const struct mbfl_convert_vtbl vtbl_wchar_armscii8 = {
58 mbfl_no_encoding_wchar,
59 mbfl_no_encoding_armscii8,
60 mbfl_filt_conv_common_ctor,
61 mbfl_filt_conv_common_dtor,
62 mbfl_filt_conv_wchar_armscii8,
63 mbfl_filt_conv_common_flush
64 };
65
66 const struct mbfl_convert_vtbl vtbl_armscii8_wchar = {
67 mbfl_no_encoding_armscii8,
68 mbfl_no_encoding_wchar,
69 mbfl_filt_conv_common_ctor,
70 mbfl_filt_conv_common_dtor,
71 mbfl_filt_conv_armscii8_wchar,
72 mbfl_filt_conv_common_flush
73 };
74
75 #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
76
77 /*
78 * armscii8 => wchar
79 */
mbfl_filt_conv_armscii8_wchar(int c,mbfl_convert_filter * filter)80 int mbfl_filt_conv_armscii8_wchar(int c, mbfl_convert_filter *filter)
81 {
82 int s;
83
84 if (c >= 0 && c < armscii8_ucs_table_min) {
85 s = c;
86 } else if (c >= armscii8_ucs_table_min && c < 0x100) {
87 s = armscii8_ucs_table[c - armscii8_ucs_table_min];
88 if (s <= 0) {
89 s = c;
90 s &= MBFL_WCSPLANE_MASK;
91 s |= MBFL_WCSPLANE_ARMSCII8;
92 }
93 } else {
94 s = c;
95 s &= MBFL_WCSGROUP_MASK;
96 s |= MBFL_WCSGROUP_THROUGH;
97 }
98
99 CK((*filter->output_function)(s, filter->data));
100
101 return c;
102 }
103
104 /*
105 * wchar => armscii8
106 */
mbfl_filt_conv_wchar_armscii8(int c,mbfl_convert_filter * filter)107 int mbfl_filt_conv_wchar_armscii8(int c, mbfl_convert_filter *filter)
108 {
109
110 int s, n;
111
112 if (c >= 0x28 && c < 0x30) {
113 s = ucs_armscii8_table[c-0x28];
114 } else if (c < armscii8_ucs_table_min) {
115 s = c;
116 } else {
117 s = -1;
118 n = armscii8_ucs_table_len-1;
119 while (n >= 0) {
120 if (c == armscii8_ucs_table[n]) {
121 s = armscii8_ucs_table_min + n;
122 break;
123 }
124 n--;
125 }
126 if (s <= 0 && (c & ~MBFL_WCSPLANE_MASK) == MBFL_WCSPLANE_ARMSCII8) {
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
mbfl_filt_ident_armscii8(int c,mbfl_identify_filter * filter)142 static int mbfl_filt_ident_armscii8(int c, mbfl_identify_filter *filter)
143 {
144 if (c >= armscii8_ucs_table_min && c <= 0xff)
145 filter->flag = 0;
146 else
147 filter->flag = 1; /* not it */
148 return c;
149 }
150
