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: Rui Hirokawa <hirokawa@php.net>
22 : *
23 : */
24 : /*
25 : * The source code included in this files was separated from mbfilter_tw.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_euc_tw.h"
36 :
37 : #include "unicode_table_cns11643.h"
38 :
39 : static int mbfl_filt_ident_euctw(int c, mbfl_identify_filter *filter);
40 :
41 : static const unsigned char mblen_table_euctw[] = { /* 0xA1-0xFE */
42 : 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
43 : 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
44 : 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
45 : 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
46 : 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
47 : 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
48 : 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
49 : 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
50 : 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 1,
51 : 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
52 : 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
53 : 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
54 : 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
55 : 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
56 : 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
57 : 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1
58 : };
59 :
60 :
61 : static const char *mbfl_encoding_euc_tw_aliases[] = {"EUC_TW", "eucTW", "x-euc-tw", NULL};
62 :
63 : const mbfl_encoding mbfl_encoding_euc_tw = {
64 : mbfl_no_encoding_euc_tw,
65 : "EUC-TW",
66 : "EUC-TW",
67 : (const char *(*)[])&mbfl_encoding_euc_tw_aliases,
68 : mblen_table_euctw,
69 : MBFL_ENCTYPE_MBCS
70 : };
71 :
72 : const struct mbfl_identify_vtbl vtbl_identify_euctw = {
73 : mbfl_no_encoding_euc_tw,
74 : mbfl_filt_ident_common_ctor,
75 : mbfl_filt_ident_common_dtor,
76 : mbfl_filt_ident_euctw
77 : };
78 :
79 : const struct mbfl_convert_vtbl vtbl_euctw_wchar = {
80 : mbfl_no_encoding_euc_tw,
81 : mbfl_no_encoding_wchar,
82 : mbfl_filt_conv_common_ctor,
83 : mbfl_filt_conv_common_dtor,
84 : mbfl_filt_conv_euctw_wchar,
85 : mbfl_filt_conv_common_flush
86 : };
87 :
88 : const struct mbfl_convert_vtbl vtbl_wchar_euctw = {
89 : mbfl_no_encoding_wchar,
90 : mbfl_no_encoding_euc_tw,
91 : mbfl_filt_conv_common_ctor,
92 : mbfl_filt_conv_common_dtor,
93 : mbfl_filt_conv_wchar_euctw,
94 : mbfl_filt_conv_common_flush
95 : };
96 :
97 : #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
98 :
99 : /*
100 : * EUC-TW => wchar
101 : */
102 : int
103 : mbfl_filt_conv_euctw_wchar(int c, mbfl_convert_filter *filter)
104 0 : {
105 : int c1, s, w, plane;
106 :
107 0 : switch (filter->status) {
108 : case 0:
109 0 : if (c >= 0 && c < 0x80) { /* latin */
110 0 : CK((*filter->output_function)(c, filter->data));
111 0 : } else if (c > 0xa0 && c < 0xff) { /* dbcs first byte */
112 0 : filter->status = 1;
113 0 : filter->cache = c;
114 0 : } else if (c == 0x8e) { /* mbcs first byte */
115 0 : filter->status = 2;
116 0 : filter->cache = c;
117 : } else {
118 0 : w = c & MBFL_WCSGROUP_MASK;
119 0 : w |= MBFL_WCSGROUP_THROUGH;
120 0 : CK((*filter->output_function)(w, filter->data));
121 : }
122 0 : break;
123 :
124 : case 1: /* mbcs second byte */
125 0 : filter->status = 0;
126 0 : c1 = filter->cache;
127 0 : if (c > 0xa0 && c < 0xff) {
128 0 : w = (c1 - 0xa1)*94 + (c - 0xa1);
129 0 : if (w >= 0 && w < cns11643_1_ucs_table_size) {
130 0 : w = cns11643_1_ucs_table[w];
131 : } else {
132 0 : w = 0;
133 : }
134 0 : if (w <= 0) {
135 0 : w = (c1 << 8) | c;
136 0 : w &= MBFL_WCSPLANE_MASK;
137 0 : w |= MBFL_WCSPLANE_CNS11643;
138 : }
139 0 : CK((*filter->output_function)(w, filter->data));
140 0 : } else if ((c >= 0 && c < 0x21) || c == 0x7f) { /* CTLs */
141 0 : CK((*filter->output_function)(c, filter->data));
142 : } else {
143 0 : w = (c1 << 8) | c;
144 0 : w &= MBFL_WCSGROUP_MASK;
145 0 : w |= MBFL_WCSGROUP_THROUGH;
146 0 : CK((*filter->output_function)(w, filter->data));
147 : }
148 0 : break;
149 :
150 : case 2: /* got 0x8e, first char */
151 0 : c1 = filter->cache;
152 0 : if ((c >= 0 && c < 0x21) || c == 0x7f) { /* CTLs */
153 0 : CK((*filter->output_function)(c, filter->data));
154 0 : filter->status = 0;
155 0 : } else if (c > 0xa0 && c < 0xaf) {
156 0 : filter->status = 3;
157 0 : filter->cache = c - 0xa1;
158 : } else {
159 0 : w = (c1 << 8) | c;
160 0 : w &= MBFL_WCSGROUP_MASK;
161 0 : w |= MBFL_WCSGROUP_THROUGH;
162 0 : CK((*filter->output_function)(w, filter->data));
163 : }
164 0 : break;
165 :
166 : case 3: /* got 0x8e, third char */
167 0 : filter->status = 0;
168 0 : c1 = filter->cache;
169 0 : if ((c >= 0 && c < 0x21) || c == 0x7f) { /* CTLs */
170 0 : CK((*filter->output_function)(c, filter->data));
171 0 : filter->status = 0;
172 0 : } else if (c > 0xa0 && c < 0xff) {
173 0 : filter->status = 4;
174 0 : filter->cache = (c1 << 8) + c - 0xa1;
175 : } else {
176 0 : w = (c1 << 8) | c;
177 0 : w &= MBFL_WCSGROUP_MASK;
178 0 : w |= MBFL_WCSGROUP_THROUGH;
179 0 : CK((*filter->output_function)(w, filter->data));
180 : }
181 0 : break;
182 :
183 : case 4: /* mbcs fourth char */
184 0 : filter->status = 0;
185 0 : c1 = filter->cache;
186 0 : if (c1 >= 0x100 && c1 <= 0xdff && c > 0xa0 && c < 0xff) {
187 0 : plane = (c1 & 0xf00) >> 8;
188 0 : s = (c1 & 0xff)*94 + c - 0xa1;
189 0 : w = 0;
190 0 : if (s >= 0) {
191 0 : if (plane == 1 && s < cns11643_2_ucs_table_size) {
192 0 : w = cns11643_2_ucs_table[s];
193 : }
194 0 : if (plane == 13 && s < cns11643_14_ucs_table_size) {
195 0 : w = cns11643_14_ucs_table[s];
196 : }
197 : }
198 0 : if (w <= 0) {
199 0 : w = ((c1 & 0x7f) << 8) | (c & 0x7f);
200 0 : w &= MBFL_WCSPLANE_MASK;
201 0 : w |= MBFL_WCSPLANE_CNS11643;
202 : }
203 0 : CK((*filter->output_function)(w, filter->data));
204 0 : } else if ((c >= 0 && c < 0x21) || c == 0x7f) { /* CTLs */
205 0 : CK((*filter->output_function)(c, filter->data));
206 : } else {
207 0 : w = (c1 << 8) | c | 0x8e0000;
208 0 : w &= MBFL_WCSGROUP_MASK;
209 0 : w |= MBFL_WCSGROUP_THROUGH;
210 0 : CK((*filter->output_function)(w, filter->data));
211 : }
212 0 : break;
213 :
214 : default:
215 0 : filter->status = 0;
216 : break;
217 : }
218 :
219 0 : return c;
220 : }
221 :
222 : /*
223 : * wchar => EUC-TW
224 : */
225 : int
226 : mbfl_filt_conv_wchar_euctw(int c, mbfl_convert_filter *filter)
227 0 : {
228 : int c1, s, plane;
229 :
230 0 : s = 0;
231 0 : if (c >= ucs_a1_cns11643_table_min && c < ucs_a1_cns11643_table_max) {
232 0 : s = ucs_a1_cns11643_table[c - ucs_a1_cns11643_table_min];
233 0 : } else if (c >= ucs_a2_cns11643_table_min && c < ucs_a2_cns11643_table_max) {
234 0 : s = ucs_a2_cns11643_table[c - ucs_a2_cns11643_table_min];
235 0 : } else if (c >= ucs_a3_cns11643_table_min && c < ucs_a3_cns11643_table_max) {
236 0 : s = ucs_a3_cns11643_table[c - ucs_a3_cns11643_table_min];
237 0 : } else if (c >= ucs_i_cns11643_table_min && c < ucs_i_cns11643_table_max) {
238 0 : s = ucs_i_cns11643_table[c - ucs_i_cns11643_table_min];
239 0 : } else if (c >= ucs_r_cns11643_table_min && c < ucs_r_cns11643_table_max) {
240 0 : s = ucs_r_cns11643_table[c - ucs_r_cns11643_table_min];
241 : }
242 0 : if (s <= 0) {
243 0 : c1 = c & ~MBFL_WCSPLANE_MASK;
244 0 : if (c1 == MBFL_WCSPLANE_CNS11643) {
245 0 : s = c & MBFL_WCSPLANE_MASK;
246 : }
247 0 : if (c == 0) {
248 0 : s = 0;
249 0 : } else if (s <= 0) {
250 0 : s = -1;
251 : }
252 : }
253 0 : if (s >= 0) {
254 0 : plane = (s & 0x1f0000) >> 16;
255 0 : if (plane <= 1){
256 0 : if (s < 0x80) { /* latin */
257 0 : CK((*filter->output_function)(s, filter->data));
258 : } else {
259 0 : s = (s & 0xffff) | 0x8080;
260 0 : CK((*filter->output_function)((s >> 8) & 0xff, filter->data));
261 0 : CK((*filter->output_function)(s & 0xff, filter->data));
262 : }
263 : } else {
264 0 : s = (0x8ea00000 + (plane << 16)) | ((s & 0xffff) | 0x8080);
265 0 : CK((*filter->output_function)(0x8e , filter->data));
266 0 : CK((*filter->output_function)((s >> 16) & 0xff, filter->data));
267 0 : CK((*filter->output_function)((s >> 8) & 0xff, filter->data));
268 0 : CK((*filter->output_function)(s & 0xff, filter->data));
269 : }
270 : } else {
271 0 : if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
272 0 : CK(mbfl_filt_conv_illegal_output(c, filter));
273 : }
274 : }
275 0 : return c;
276 : }
277 :
278 : static int mbfl_filt_ident_euctw(int c, mbfl_identify_filter *filter)
279 0 : {
280 0 : switch (filter->status) {
281 : case 0: /* latin */
282 0 : if (c >= 0 && c < 0x80) { /* ok */
283 : ;
284 0 : } else if (c > 0xa0 && c < 0xff) { /* DBCS lead byte */
285 0 : filter->status = 1;
286 0 : } else if (c == 0x8e) { /* DBCS lead byte */
287 0 : filter->status = 2;
288 : } else { /* bad */
289 0 : filter->flag = 1;
290 : }
291 0 : break;
292 :
293 : case 1: /* got lead byte */
294 0 : if (c < 0xa1 || c > 0xfe) { /* bad */
295 0 : filter->flag = 1;
296 : }
297 0 : filter->status = 0;
298 0 : break;
299 :
300 : case 2: /* got lead byte */
301 0 : if (c >= 0xa1 && c < 0xaf) { /* ok */
302 0 : filter->status = 3;
303 : } else {
304 0 : filter->flag = 1; /* bad */
305 : }
306 0 : break;
307 :
308 : case 3: /* got lead byte */
309 0 : if (c < 0xa1 || c > 0xfe) { /* bad */
310 0 : filter->flag = 1;
311 : }
312 0 : filter->status = 4;
313 0 : break;
314 :
315 : case 4: /* got lead byte */
316 0 : if (c < 0xa1 || c > 0xfe) { /* bad */
317 0 : filter->flag = 1;
318 : }
319 0 : filter->status = 0;
320 0 : break;
321 :
322 : default:
323 0 : filter->status = 0;
324 : break;
325 : }
326 :
327 0 : return c;
328 : }
329 :
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