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:
22 *
23 */
24 /*
25 * The source code included in this files was separated from mbfilter_jis.c
26 * by rui hirokawa <hirokawa@php.net> on 18 aug 2011.
27 *
28 */
29
30 #include "mbfilter.h"
31 #include "mbfilter_iso2022jp_2004.h"
32 #include "mbfilter_sjis_2004.h"
33
34 #include "unicode_table_jis.h"
35
36 extern int mbfl_filt_conv_any_jis_flush(mbfl_convert_filter *filter);
37 static int mbfl_filt_ident_2022jp_2004(int c, mbfl_identify_filter *filter);
38
39 const mbfl_encoding mbfl_encoding_2022jp_2004 = {
40 mbfl_no_encoding_2022jp_2004,
41 "ISO-2022-JP-2004",
42 "ISO-2022-JP-2004",
43 NULL,
44 NULL,
45 MBFL_ENCTYPE_MBCS | MBFL_ENCTYPE_GL_UNSAFE,
46 &vtbl_2022jp_2004_wchar,
47 &vtbl_wchar_2022jp_2004
48 };
49
50 const struct mbfl_identify_vtbl vtbl_identify_2022jp_2004 = {
51 mbfl_no_encoding_2022jp_2004,
52 mbfl_filt_ident_common_ctor,
53 mbfl_filt_ident_2022jp_2004
54 };
55
56 const struct mbfl_convert_vtbl vtbl_2022jp_2004_wchar = {
57 mbfl_no_encoding_2022jp_2004,
58 mbfl_no_encoding_wchar,
59 mbfl_filt_conv_common_ctor,
60 NULL,
61 mbfl_filt_conv_jis2004_wchar,
62 mbfl_filt_conv_common_flush,
63 NULL,
64 };
65
66 const struct mbfl_convert_vtbl vtbl_wchar_2022jp_2004 = {
67 mbfl_no_encoding_wchar,
68 mbfl_no_encoding_2022jp_2004,
69 mbfl_filt_conv_common_ctor,
70 NULL,
71 mbfl_filt_conv_wchar_jis2004,
72 mbfl_filt_conv_jis2004_flush,
73 NULL,
74 };
75
mbfl_filt_ident_2022jp_2004(int c,mbfl_identify_filter * filter)76 static int mbfl_filt_ident_2022jp_2004(int c, mbfl_identify_filter *filter)
77 {
78 retry:
79 switch (filter->status & 0xf) {
80 /* case 0x00: ASCII */
81 /* case 0x80: X 0212 */
82 /* case 0x90: X 0213 plane 1 */
83 /* case 0xa0: X 0213 plane 2 */
84 case 0:
85 if (c == 0x1b) {
86 filter->status += 2;
87 } else if (filter->status == 0x80 && c > 0x20 && c < 0x7f) { /* kanji first char */
88 filter->status += 1;
89 } else if (c >= 0 && c < 0x80) { /* latin, CTLs */
90 ;
91 } else {
92 filter->flag = 1; /* bad */
93 }
94 break;
95
96 /* case 0x81: X 0208 second char */
97 case 1:
98 if (c == 0x1b) {
99 filter->status++;
100 } else {
101 filter->status &= ~0xf;
102 if (c < 0x21 || c > 0x7e) { /* bad */
103 filter->flag = 1;
104 }
105 }
106 break;
107
108 /* ESC */
109 case 2:
110 if (c == 0x24) { /* '$' */
111 filter->status++;
112 } else if (c == 0x28) { /* '(' */
113 filter->status += 3;
114 } else {
115 filter->flag = 1; /* bad */
116 filter->status &= ~0xf;
117 goto retry;
118 }
119 break;
120
121 /* ESC $ */
122 case 3:
123 if (c == 0x42) { /* 'B' */
124 filter->status = 0x80;
125 } else if (c == 0x28) { /* '(' */
126 filter->status++;
127 } else {
128 filter->flag = 1; /* bad */
129 filter->status &= ~0xf;
130 goto retry;
131 }
132 break;
133
134 /* ESC $ ( */
135 case 4:
136 if (c == 0x51) { /* JIS X 0213 plane 1 */
137 filter->status = 0x90;
138 } else if (c == 0x50) { /* JIS X 0213 plane 2 */
139 filter->status = 0xa0;
140 } else {
141 filter->flag = 1; /* bad */
142 filter->status &= ~0xf;
143 goto retry;
144 }
145 break;
146
147 /* ESC ( */
148 case 5:
149 if (c == 0x42) { /* 'B' */
150 filter->status = 0;
151 } else {
152 filter->flag = 1; /* bad */
153 filter->status &= ~0xf;
154 goto retry;
155 }
156 break;
157
158 default:
159 filter->status = 0;
160 break;
161 }
162
163 return c;
164 }
165
