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 &vtbl_armscii8_wchar,
49 &vtbl_wchar_armscii8
50 };
51
52 const struct mbfl_identify_vtbl vtbl_identify_armscii8 = {
53 mbfl_no_encoding_armscii8,
54 mbfl_filt_ident_common_ctor,
55 mbfl_filt_ident_common_dtor,
56 mbfl_filt_ident_armscii8
57 };
58
59 const struct mbfl_convert_vtbl vtbl_wchar_armscii8 = {
60 mbfl_no_encoding_wchar,
61 mbfl_no_encoding_armscii8,
62 mbfl_filt_conv_common_ctor,
63 mbfl_filt_conv_common_dtor,
64 mbfl_filt_conv_wchar_armscii8,
65 mbfl_filt_conv_common_flush
66 };
67
68 const struct mbfl_convert_vtbl vtbl_armscii8_wchar = {
69 mbfl_no_encoding_armscii8,
70 mbfl_no_encoding_wchar,
71 mbfl_filt_conv_common_ctor,
72 mbfl_filt_conv_common_dtor,
73 mbfl_filt_conv_armscii8_wchar,
74 mbfl_filt_conv_common_flush
75 };
76
77 #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
78
79 /*
80 * armscii8 => wchar
81 */
mbfl_filt_conv_armscii8_wchar(int c,mbfl_convert_filter * filter)82 int mbfl_filt_conv_armscii8_wchar(int c, mbfl_convert_filter *filter)
83 {
84 int s;
85
86 if (c >= 0 && c < armscii8_ucs_table_min) {
87 s = c;
88 } else if (c >= armscii8_ucs_table_min && c < 0x100) {
89 s = armscii8_ucs_table[c - armscii8_ucs_table_min];
90 if (s <= 0) {
91 s = c;
92 s &= MBFL_WCSPLANE_MASK;
93 s |= MBFL_WCSPLANE_ARMSCII8;
94 }
95 } else {
96 s = c;
97 s &= MBFL_WCSGROUP_MASK;
98 s |= MBFL_WCSGROUP_THROUGH;
99 }
100
101 CK((*filter->output_function)(s, filter->data));
102
103 return c;
104 }
105
106 /*
107 * wchar => armscii8
108 */
mbfl_filt_conv_wchar_armscii8(int c,mbfl_convert_filter * filter)109 int mbfl_filt_conv_wchar_armscii8(int c, mbfl_convert_filter *filter)
110 {
111
112 int s, n;
113
114 if (c >= 0x28 && c < 0x30) {
115 s = ucs_armscii8_table[c-0x28];
116 } else if (c < armscii8_ucs_table_min) {
117 s = c;
118 } else {
119 s = -1;
120 n = armscii8_ucs_table_len-1;
121 while (n >= 0) {
122 if (c == armscii8_ucs_table[n]) {
123 s = armscii8_ucs_table_min + n;
124 break;
125 }
126 n--;
127 }
128 if (s <= 0 && (c & ~MBFL_WCSPLANE_MASK) == MBFL_WCSPLANE_ARMSCII8) {
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_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
