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.c
26 * by moriyoshi koizumi <moriyoshi@php.net> on 4 dec 2002.
27 *
28 */
29
30 #ifdef HAVE_CONFIG_H
31 #include "config.h"
32 #endif
33
34 #include "mbfilter.h"
35 #include "mbfilter_ucs2.h"
36
37 static const char *mbfl_encoding_ucs2_aliases[] = {"ISO-10646-UCS-2", "UCS2" , "UNICODE", NULL};
38
39 const mbfl_encoding mbfl_encoding_ucs2 = {
40 mbfl_no_encoding_ucs2,
41 "UCS-2",
42 "UCS-2",
43 (const char *(*)[])&mbfl_encoding_ucs2_aliases,
44 NULL,
45 MBFL_ENCTYPE_WCS2BE
46 };
47
48 const mbfl_encoding mbfl_encoding_ucs2be = {
49 mbfl_no_encoding_ucs2be,
50 "UCS-2BE",
51 "UCS-2BE",
52 NULL,
53 NULL,
54 MBFL_ENCTYPE_WCS2BE
55 };
56
57 const mbfl_encoding mbfl_encoding_ucs2le = {
58 mbfl_no_encoding_ucs2le,
59 "UCS-2LE",
60 "UCS-2LE",
61 NULL,
62 NULL,
63 MBFL_ENCTYPE_WCS2LE
64 };
65
66 const struct mbfl_convert_vtbl vtbl_ucs2_wchar = {
67 mbfl_no_encoding_ucs2,
68 mbfl_no_encoding_wchar,
69 mbfl_filt_conv_common_ctor,
70 mbfl_filt_conv_common_dtor,
71 mbfl_filt_conv_ucs2_wchar,
72 mbfl_filt_conv_common_flush
73 };
74
75 const struct mbfl_convert_vtbl vtbl_wchar_ucs2 = {
76 mbfl_no_encoding_wchar,
77 mbfl_no_encoding_ucs2,
78 mbfl_filt_conv_common_ctor,
79 mbfl_filt_conv_common_dtor,
80 mbfl_filt_conv_wchar_ucs2be,
81 mbfl_filt_conv_common_flush
82 };
83
84 const struct mbfl_convert_vtbl vtbl_ucs2be_wchar = {
85 mbfl_no_encoding_ucs2be,
86 mbfl_no_encoding_wchar,
87 mbfl_filt_conv_common_ctor,
88 mbfl_filt_conv_common_dtor,
89 mbfl_filt_conv_ucs2be_wchar,
90 mbfl_filt_conv_common_flush
91 };
92
93 const struct mbfl_convert_vtbl vtbl_wchar_ucs2be = {
94 mbfl_no_encoding_wchar,
95 mbfl_no_encoding_ucs2be,
96 mbfl_filt_conv_common_ctor,
97 mbfl_filt_conv_common_dtor,
98 mbfl_filt_conv_wchar_ucs2be,
99 mbfl_filt_conv_common_flush
100 };
101
102 const struct mbfl_convert_vtbl vtbl_ucs2le_wchar = {
103 mbfl_no_encoding_ucs2le,
104 mbfl_no_encoding_wchar,
105 mbfl_filt_conv_common_ctor,
106 mbfl_filt_conv_common_dtor,
107 mbfl_filt_conv_ucs2le_wchar,
108 mbfl_filt_conv_common_flush
109 };
110
111 const struct mbfl_convert_vtbl vtbl_wchar_ucs2le = {
112 mbfl_no_encoding_wchar,
113 mbfl_no_encoding_ucs2le,
114 mbfl_filt_conv_common_ctor,
115 mbfl_filt_conv_common_dtor,
116 mbfl_filt_conv_wchar_ucs2le,
117 mbfl_filt_conv_common_flush
118 };
119
120 #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
121
122 /*
123 * UCS-2 => wchar
124 */
mbfl_filt_conv_ucs2_wchar(int c,mbfl_convert_filter * filter)125 int mbfl_filt_conv_ucs2_wchar(int c, mbfl_convert_filter *filter)
126 {
127 int n, endian;
128
129 endian = filter->status & 0xff00;
130 switch (filter->status & 0xff) {
131 case 0:
132 if (endian) {
133 n = c & 0xff;
134 } else {
135 n = (c & 0xff) << 8;
136 }
137 filter->cache = n;
138 filter->status++;
139 break;
140 default:
141 if (endian) {
142 n = (c & 0xff) << 8;
143 } else {
144 n = c & 0xff;
145 }
146 n |= filter->cache;
147 if (n == 0xfffe) {
148 if (endian) {
149 filter->status = 0; /* big-endian */
150 } else {
151 filter->status = 0x100; /* little-endian */
152 }
153 CK((*filter->output_function)(0xfeff, filter->data));
154 } else {
155 filter->status &= ~0xff;
156 CK((*filter->output_function)(n, filter->data));
157 }
158 break;
159 }
160
161 return c;
162 }
163
164 /*
165 * UCS-2BE => wchar
166 */
mbfl_filt_conv_ucs2be_wchar(int c,mbfl_convert_filter * filter)167 int mbfl_filt_conv_ucs2be_wchar(int c, mbfl_convert_filter *filter)
168 {
169 int n;
170
171 if (filter->status == 0) {
172 filter->status = 1;
173 n = (c & 0xff) << 8;
174 filter->cache = n;
175 } else {
176 filter->status = 0;
177 n = (c & 0xff) | filter->cache;
178 CK((*filter->output_function)(n, filter->data));
179 }
180 return c;
181 }
182
183 /*
184 * wchar => UCS-2BE
185 */
mbfl_filt_conv_wchar_ucs2be(int c,mbfl_convert_filter * filter)186 int mbfl_filt_conv_wchar_ucs2be(int c, mbfl_convert_filter *filter)
187 {
188 if (c >= 0 && c < MBFL_WCSPLANE_UCS2MAX) {
189 CK((*filter->output_function)((c >> 8) & 0xff, filter->data));
190 CK((*filter->output_function)(c & 0xff, filter->data));
191 } else {
192 if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
193 CK(mbfl_filt_conv_illegal_output(c, filter));
194 }
195 }
196
197 return c;
198 }
199
200 /*
201 * UCS-2LE => wchar
202 */
mbfl_filt_conv_ucs2le_wchar(int c,mbfl_convert_filter * filter)203 int mbfl_filt_conv_ucs2le_wchar(int c, mbfl_convert_filter *filter)
204 {
205 int n;
206
207 if (filter->status == 0) {
208 filter->status = 1;
209 n = c & 0xff;
210 filter->cache = n;
211 } else {
212 filter->status = 0;
213 n = ((c & 0xff) << 8) | filter->cache;
214 CK((*filter->output_function)(n, filter->data));
215 }
216 return c;
217 }
218
219
220 /*
221 * wchar => UCS-2LE
222 */
mbfl_filt_conv_wchar_ucs2le(int c,mbfl_convert_filter * filter)223 int mbfl_filt_conv_wchar_ucs2le(int c, mbfl_convert_filter *filter)
224 {
225 if (c >= 0 && c < MBFL_WCSPLANE_UCS2MAX) {
226 CK((*filter->output_function)(c & 0xff, filter->data));
227 CK((*filter->output_function)((c >> 8) & 0xff, filter->data));
228 } else {
229 if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
230 CK(mbfl_filt_conv_illegal_output(c, filter));
231 }
232 }
233
234 return c;
235 }
236
