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 #include "mbfilter.h"
30 #include "mbfilter_armscii8.h"
31 #include "unicode_table_armscii8.h"
32
33 static int mbfl_filt_ident_armscii8(int c, mbfl_identify_filter *filter);
34
35 static const char *mbfl_encoding_armscii8_aliases[] = {"ArmSCII-8", "ArmSCII8", "ARMSCII-8", "ARMSCII8", NULL};
36
37 const mbfl_encoding mbfl_encoding_armscii8 = {
38 mbfl_no_encoding_armscii8,
39 "ArmSCII-8",
40 "ArmSCII-8",
41 (const char *(*)[])&mbfl_encoding_armscii8_aliases,
42 NULL,
43 MBFL_ENCTYPE_SBCS,
44 &vtbl_armscii8_wchar,
45 &vtbl_wchar_armscii8
46 };
47
48 const struct mbfl_identify_vtbl vtbl_identify_armscii8 = {
49 mbfl_no_encoding_armscii8,
50 mbfl_filt_ident_common_ctor,
51 mbfl_filt_ident_armscii8
52 };
53
54 const struct mbfl_convert_vtbl vtbl_wchar_armscii8 = {
55 mbfl_no_encoding_wchar,
56 mbfl_no_encoding_armscii8,
57 mbfl_filt_conv_common_ctor,
58 NULL,
59 mbfl_filt_conv_wchar_armscii8,
60 mbfl_filt_conv_common_flush,
61 NULL,
62 };
63
64 const struct mbfl_convert_vtbl vtbl_armscii8_wchar = {
65 mbfl_no_encoding_armscii8,
66 mbfl_no_encoding_wchar,
67 mbfl_filt_conv_common_ctor,
68 NULL,
69 mbfl_filt_conv_armscii8_wchar,
70 mbfl_filt_conv_common_flush,
71 NULL,
72 };
73
74 #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
75
76 /*
77 * armscii8 => wchar
78 */
mbfl_filt_conv_armscii8_wchar(int c,mbfl_convert_filter * filter)79 int mbfl_filt_conv_armscii8_wchar(int c, mbfl_convert_filter *filter)
80 {
81 int s;
82
83 if (c >= 0 && c < armscii8_ucs_table_min) {
84 s = c;
85 } else if (c >= armscii8_ucs_table_min && c < 0x100) {
86 s = armscii8_ucs_table[c - armscii8_ucs_table_min];
87 if (s <= 0) {
88 s = c;
89 s &= MBFL_WCSPLANE_MASK;
90 s |= MBFL_WCSPLANE_ARMSCII8;
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 => armscii8
105 */
mbfl_filt_conv_wchar_armscii8(int c,mbfl_convert_filter * filter)106 int mbfl_filt_conv_wchar_armscii8(int c, mbfl_convert_filter *filter)
107 {
108
109 int s, n;
110
111 if (c >= 0x28 && c < 0x30) {
112 s = ucs_armscii8_table[c-0x28];
113 } else if (c < armscii8_ucs_table_min) {
114 s = c;
115 } else {
116 s = -1;
117 n = armscii8_ucs_table_len-1;
118 while (n >= 0) {
119 if (c == armscii8_ucs_table[n]) {
120 s = armscii8_ucs_table_min + n;
121 break;
122 }
123 n--;
124 }
125 if (s <= 0 && (c & ~MBFL_WCSPLANE_MASK) == MBFL_WCSPLANE_ARMSCII8) {
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_armscii8(int c,mbfl_identify_filter * filter)139 static int mbfl_filt_ident_armscii8(int c, mbfl_identify_filter *filter)
140 {
141 if (c >= armscii8_ucs_table_min && c <= 0xff)
142 filter->flag = 0;
143 else
144 filter->flag = 1; /* not it */
145 return c;
146 }
147
