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 part: Marcus Boerger <helly@php.net>
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 #ifdef HAVE_STRING_H
35 #include <string.h>
36 #endif
37
38 #ifdef HAVE_STRINGS_H
39 #include <strings.h>
40 #endif
41
42 #include "mbfilter.h"
43 #include "mbfilter_htmlent.h"
44 #include "html_entities.h"
45
46 static const int htmlentitifieds[256] = {
47 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
48 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
49 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0,
50 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0,
51 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
52 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
53 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
54 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
55 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
56 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
57 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
58 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
59 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
60 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
61 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
62 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
63 };
64
65 static const char *mbfl_encoding_html_ent_aliases[] = {"HTML", "html", NULL};
66
67 const mbfl_encoding mbfl_encoding_html_ent = {
68 mbfl_no_encoding_html_ent,
69 "HTML-ENTITIES",
70 "HTML-ENTITIES",
71 (const char *(*)[])&mbfl_encoding_html_ent_aliases,
72 NULL,
73 MBFL_ENCTYPE_ENC_STRM | MBFL_ENCTYPE_GL_UNSAFE
74 };
75
76 const struct mbfl_convert_vtbl vtbl_wchar_html = {
77 mbfl_no_encoding_wchar,
78 mbfl_no_encoding_html_ent,
79 mbfl_filt_conv_common_ctor,
80 mbfl_filt_conv_common_dtor,
81 mbfl_filt_conv_html_enc,
82 mbfl_filt_conv_html_enc_flush
83 };
84
85 const struct mbfl_convert_vtbl vtbl_html_wchar = {
86 mbfl_no_encoding_html_ent,
87 mbfl_no_encoding_wchar,
88 mbfl_filt_conv_html_dec_ctor,
89 mbfl_filt_conv_html_dec_dtor,
90 mbfl_filt_conv_html_dec,
91 mbfl_filt_conv_html_dec_flush,
92 mbfl_filt_conv_html_dec_copy };
93
94
95 #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
96
97 /*
98 * any => HTML
99 */
mbfl_filt_conv_html_enc(int c,mbfl_convert_filter * filter)100 int mbfl_filt_conv_html_enc(int c, mbfl_convert_filter *filter)
101 {
102 int tmp[64];
103 int i;
104 unsigned int uc;
105 const mbfl_html_entity_entry *e;
106
107 if (c < sizeof(htmlentitifieds) / sizeof(htmlentitifieds[0]) &&
108 htmlentitifieds[c] != 1) {
109 CK((*filter->output_function)(c, filter->data));
110 } else {
111 CK((*filter->output_function)('&', filter->data));
112 for (i = 0; (e = &mbfl_html_entity_list[i])->name != NULL; i++) {
113 if (c == e->code) {
114 char *p;
115
116 for (p = e->name; *p != '\0'; p++) {
117 CK((*filter->output_function)((int)*p, filter->data));
118 }
119 goto last;
120 }
121 }
122
123 {
124 int *p = tmp + sizeof(tmp) / sizeof(tmp[0]);
125
126 CK((*filter->output_function)('#', filter->data));
127
128 uc = (unsigned int)c;
129
130 *(--p) = '\0';
131 do {
132 *(--p) = "0123456789"[uc % 10];
133 uc /= 10;
134 } while (uc);
135
136 for (; *p != '\0'; p++) {
137 CK((*filter->output_function)(*p, filter->data));
138 }
139 }
140 last:
141 CK((*filter->output_function)(';', filter->data));
142 }
143 return c;
144 }
145
mbfl_filt_conv_html_enc_flush(mbfl_convert_filter * filter)146 int mbfl_filt_conv_html_enc_flush(mbfl_convert_filter *filter)
147 {
148 filter->status = 0;
149 filter->opaque = NULL;
150
151 if (filter->flush_function != NULL) {
152 (*filter->flush_function)(filter->data);
153 }
154
155 return 0;
156 }
157
158 /*
159 * HTML => any
160 */
161 #define html_enc_buffer_size 16
162 static const char html_entity_chars[] = "#0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
163
mbfl_filt_conv_html_dec_ctor(mbfl_convert_filter * filter)164 void mbfl_filt_conv_html_dec_ctor(mbfl_convert_filter *filter)
165 {
166 filter->status = 0;
167 filter->opaque = mbfl_malloc(html_enc_buffer_size+1);
168 }
169
mbfl_filt_conv_html_dec_dtor(mbfl_convert_filter * filter)170 void mbfl_filt_conv_html_dec_dtor(mbfl_convert_filter *filter)
171 {
172 filter->status = 0;
173 if (filter->opaque)
174 {
175 mbfl_free((void*)filter->opaque);
176 }
177 filter->opaque = NULL;
178 }
179
mbfl_filt_conv_html_dec(int c,mbfl_convert_filter * filter)180 int mbfl_filt_conv_html_dec(int c, mbfl_convert_filter *filter)
181 {
182 int pos, ent = 0;
183 mbfl_html_entity_entry *entity;
184 char *buffer = (char*)filter->opaque;
185
186 if (!filter->status) {
187 if (c == '&' ) {
188 filter->status = 1;
189 buffer[0] = '&';
190 } else {
191 CK((*filter->output_function)(c, filter->data));
192 }
193 } else {
194 if (c == ';') {
195 if (buffer[1]=='#') {
196 if (filter->status > 2 && (buffer[2] == 'x' || buffer[2] == 'X')) {
197 if (filter->status > 3) {
198 /* numeric entity */
199 for (pos=3; pos<filter->status; pos++) {
200 int v = buffer[pos];
201 if (v >= '0' && v <= '9') {
202 v = v - '0';
203 } else if (v >= 'A' && v <= 'F') {
204 v = v - 'A' + 10;
205 } else if (v >= 'a' && v <= 'f') {
206 v = v - 'a' + 10;
207 } else {
208 ent = -1;
209 break;
210 }
211 ent = ent * 16 + v;
212 }
213 } else {
214 ent = -1;
215 }
216 } else {
217 /* numeric entity */
218 if (filter->status > 2) {
219 for (pos=2; pos<filter->status; pos++) {
220 int v = buffer[pos];
221 if (v >= '0' && v <= '9') {
222 v = v - '0';
223 } else {
224 ent = -1;
225 break;
226 }
227 ent = ent*10 + v;
228 }
229 } else {
230 ent = -1;
231 }
232 }
233 if (ent >= 0 && ent < 0x110000) {
234 CK((*filter->output_function)(ent, filter->data));
235 } else {
236 for (pos = 0; pos < filter->status; pos++) {
237 CK((*filter->output_function)(buffer[pos], filter->data));
238 }
239 CK((*filter->output_function)(c, filter->data));
240 }
241 filter->status = 0;
242 /*php_error_docref("ref.mbstring", E_NOTICE, "mbstring decoded '%s'=%d", buffer, ent);*/
243 } else {
244 /* named entity */
245 buffer[filter->status] = 0;
246 entity = (mbfl_html_entity_entry *)mbfl_html_entity_list;
247 while (entity->name) {
248 if (!strcmp(buffer+1, entity->name)) {
249 ent = entity->code;
250 break;
251 }
252 entity++;
253 }
254 if (ent) {
255 /* decoded */
256 CK((*filter->output_function)(ent, filter->data));
257 filter->status = 0;
258 /*php_error_docref("ref.mbstring", E_NOTICE,"mbstring decoded '%s'=%d", buffer, ent);*/
259 } else {
260 /* failure */
261 buffer[filter->status++] = ';';
262 buffer[filter->status] = 0;
263 /* php_error_docref("ref.mbstring", E_WARNING, "mbstring cannot decode '%s'", buffer); */
264 mbfl_filt_conv_html_dec_flush(filter);
265 }
266 }
267 } else {
268 /* add character */
269 buffer[filter->status++] = c;
270 /* add character and check */
271 if (!strchr(html_entity_chars, c) || filter->status+1==html_enc_buffer_size || (c=='#' && filter->status>2))
272 {
273 /* illegal character or end of buffer */
274 if (c=='&')
275 filter->status--;
276 buffer[filter->status] = 0;
277 /* php_error_docref("ref.mbstring", E_WARNING, "mbstring cannot decode '%s'", buffer)l */
278 mbfl_filt_conv_html_dec_flush(filter);
279 if (c=='&')
280 {
281 buffer[filter->status++] = '&';
282 }
283 }
284 }
285 }
286 return c;
287 }
288
mbfl_filt_conv_html_dec_flush(mbfl_convert_filter * filter)289 int mbfl_filt_conv_html_dec_flush(mbfl_convert_filter *filter)
290 {
291 int status, pos = 0;
292 unsigned char *buffer;
293 int err = 0;
294
295 buffer = (unsigned char*)filter->opaque;
296 status = filter->status;
297 filter->status = 0;
298
299 /* flush fragments */
300 while (status--) {
301 int e = (*filter->output_function)(buffer[pos++], filter->data);
302 if (e != 0)
303 err = e;
304 }
305
306 if (filter->flush_function != NULL) {
307 (*filter->flush_function)(filter->data);
308 }
309
310 return err;
311 }
312
mbfl_filt_conv_html_dec_copy(mbfl_convert_filter * src,mbfl_convert_filter * dest)313 void mbfl_filt_conv_html_dec_copy(mbfl_convert_filter *src, mbfl_convert_filter *dest)
314 {
315 *dest = *src;
316 dest->opaque = mbfl_malloc(html_enc_buffer_size+1);
317 memcpy(dest->opaque, src->opaque, html_enc_buffer_size+1);
318 }
319
