Annotation of embedaddon/php/ext/mbstring/libmbfl/filters/mbfilter_utf8.c, revision 1.1.1.3
1.1 misho 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_utf8.h"
36:
1.1.1.2 misho 37: int mbfl_filt_ident_utf8(int c, mbfl_identify_filter *filter);
1.1 misho 38:
1.1.1.2 misho 39: const unsigned char mblen_table_utf8[] = {
40: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
41: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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, 1, 1,
51: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
52: 1, 1, 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: 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
55: 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
1.1 misho 56: };
57:
58: static const char *mbfl_encoding_utf8_aliases[] = {"utf8", NULL};
59:
60: const mbfl_encoding mbfl_encoding_utf8 = {
61: mbfl_no_encoding_utf8,
62: "UTF-8",
63: "UTF-8",
64: (const char *(*)[])&mbfl_encoding_utf8_aliases,
65: mblen_table_utf8,
66: MBFL_ENCTYPE_MBCS
67: };
68:
69: const struct mbfl_identify_vtbl vtbl_identify_utf8 = {
70: mbfl_no_encoding_utf8,
71: mbfl_filt_ident_common_ctor,
72: mbfl_filt_ident_common_dtor,
73: mbfl_filt_ident_utf8
74: };
75:
76: const struct mbfl_convert_vtbl vtbl_utf8_wchar = {
77: mbfl_no_encoding_utf8,
78: mbfl_no_encoding_wchar,
79: mbfl_filt_conv_common_ctor,
80: mbfl_filt_conv_common_dtor,
81: mbfl_filt_conv_utf8_wchar,
1.1.1.3 ! misho 82: mbfl_filt_conv_utf8_wchar_flush
1.1 misho 83: };
84:
85: const struct mbfl_convert_vtbl vtbl_wchar_utf8 = {
86: mbfl_no_encoding_wchar,
87: mbfl_no_encoding_utf8,
88: mbfl_filt_conv_common_ctor,
89: mbfl_filt_conv_common_dtor,
90: mbfl_filt_conv_wchar_utf8,
91: mbfl_filt_conv_common_flush
92: };
93:
94: #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
95:
1.1.1.3 ! misho 96: int mbfl_filt_put_invalid_char(int c, mbfl_convert_filter *filter)
! 97: {
! 98: int w;
! 99: w = c & MBFL_WCSGROUP_MASK;
! 100: w |= MBFL_WCSGROUP_THROUGH;
! 101: filter->status = 0;
! 102: filter->cache = 0;
! 103: CK((*filter->output_function)(w, filter->data));
! 104: }
! 105:
! 106:
1.1 misho 107: /*
108: * UTF-8 => wchar
109: */
110: int mbfl_filt_conv_utf8_wchar(int c, mbfl_convert_filter *filter)
111: {
1.1.1.2 misho 112: int s, c1, w = 0, flag = 0;
1.1 misho 113:
1.1.1.3 ! misho 114: retry:
! 115: switch (filter->status & 0xff) {
! 116: case 0x00:
! 117: if (c < 0x80) {
1.1 misho 118: CK((*filter->output_function)(c, filter->data));
1.1.1.3 ! misho 119: } else if (c >= 0xc2 && c <= 0xdf) { /* 2byte code first char: 0xc2-0xdf */
! 120: filter->status = 0x10;
! 121: filter->cache = c & 0x1f;
! 122: } else if (c >= 0xe0 && c <= 0xef) { /* 3byte code first char: 0xe0-0xef */
! 123: filter->status = 0x20;
! 124: filter->cache = c & 0xf;
! 125: } else if (c >= 0xf0 && c <= 0xf4) { /* 3byte code first char: 0xf0-0xf4 */
! 126: filter->status = 0x30;
! 127: filter->cache = c & 0x7;
! 128: } else {
! 129: mbfl_filt_put_invalid_char(c, filter);
1.1 misho 130: }
1.1.1.3 ! misho 131: break;
! 132: case 0x10: /* 2byte code 2nd char: 0x80-0xbf */
! 133: case 0x21: /* 3byte code 3rd char: 0x80-0xbf */
! 134: case 0x32: /* 4byte code 4th char: 0x80-0xbf */
! 135: filter->status = 0;
! 136: if (c >= 0x80 && c <= 0xbf) {
! 137: s = (filter->cache<<6) | (c & 0x3f);
1.1.1.2 misho 138: filter->cache = 0;
1.1.1.3 ! misho 139: CK((*filter->output_function)(s, filter->data));
! 140: } else {
! 141: mbfl_filt_put_invalid_char(filter->cache, filter);
! 142: goto retry;
1.1 misho 143: }
1.1.1.3 ! misho 144: break;
! 145: case 0x20: /* 3byte code 2nd char: 0:0xa0-0xbf,D:0x80-9F,1-C,E-F:0x80-0x9f */
! 146: s = (filter->cache<<6) | (c & 0x3f);
! 147: c1 = filter->cache & 0xf;
! 148:
! 149: if ((c >= 0x80 && c <= 0xbf) &&
! 150: ((c1 == 0x0 && c >= 0xa0) ||
! 151: (c1 == 0xd && c < 0xa0) ||
! 152: (c1 > 0x0 && c1 != 0xd))) {
! 153: filter->cache = s;
! 154: filter->status++;
1.1.1.2 misho 155: } else {
1.1.1.3 ! misho 156: mbfl_filt_put_invalid_char(filter->cache, filter);
! 157: goto retry;
1.1.1.2 misho 158: }
1.1.1.3 ! misho 159: break;
! 160: case 0x30: /* 4byte code 2nd char: 0:0x90-0xbf,1-3:0x80-0xbf,4:0x80-0x8f */
! 161: s = (filter->cache<<6) | (c & 0x3f);
! 162: c1 = filter->cache & 0x7;
! 163:
! 164: if ((c >= 0x80 && c <= 0xbf) &&
! 165: ((c1 == 0x0 && c >= 0x90) ||
! 166: (c1 == 0x4 && c < 0x90) ||
! 167: (c1 > 0x0 && c1 != 0x4))) {
! 168: filter->cache = s;
! 169: filter->status++;
1.1.1.2 misho 170: } else {
1.1.1.3 ! misho 171: mbfl_filt_put_invalid_char(filter->cache, filter);
! 172: goto retry;
1.1.1.2 misho 173: }
1.1.1.3 ! misho 174: break;
! 175: case 0x31: /* 4byte code 3rd char: 0x80-0xbf */
! 176: if (c >= 0x80 && c <= 0xbf) {
! 177: filter->cache = (filter->cache<<6) | (c & 0x3f);
! 178: filter->status++;
1.1.1.2 misho 179: } else {
1.1.1.3 ! misho 180: mbfl_filt_put_invalid_char(filter->cache, filter);
! 181: goto retry;
1.1.1.2 misho 182: }
1.1.1.3 ! misho 183: break;
! 184: default:
1.1 misho 185: filter->status = 0;
1.1.1.3 ! misho 186: break;
1.1 misho 187: }
188:
189: return c;
190: }
191:
1.1.1.3 ! misho 192: int mbfl_filt_conv_utf8_wchar_flush(mbfl_convert_filter *filter)
! 193: {
! 194: int status, cache;
! 195:
! 196: status = filter->status;
! 197: cache = filter->cache;
! 198:
! 199: filter->status = 0;
! 200: filter->cache = 0;
! 201:
! 202: if (status != 0) {
! 203: mbfl_filt_put_invalid_char(cache, filter);
! 204: }
! 205:
! 206: if (filter->flush_function != NULL) {
! 207: (*filter->flush_function)(filter->data);
! 208: }
! 209: return 0;
! 210: }
! 211:
1.1 misho 212: /*
213: * wchar => UTF-8
214: */
215: int mbfl_filt_conv_wchar_utf8(int c, mbfl_convert_filter *filter)
216: {
1.1.1.2 misho 217: if (c >= 0 && c < 0x110000) {
1.1 misho 218: if (c < 0x80) {
219: CK((*filter->output_function)(c, filter->data));
220: } else if (c < 0x800) {
221: CK((*filter->output_function)(((c >> 6) & 0x1f) | 0xc0, filter->data));
222: CK((*filter->output_function)((c & 0x3f) | 0x80, filter->data));
223: } else if (c < 0x10000) {
224: CK((*filter->output_function)(((c >> 12) & 0x0f) | 0xe0, filter->data));
225: CK((*filter->output_function)(((c >> 6) & 0x3f) | 0x80, filter->data));
226: CK((*filter->output_function)((c & 0x3f) | 0x80, filter->data));
227: } else {
1.1.1.2 misho 228: CK((*filter->output_function)(((c >> 18) & 0x07) | 0xf0, filter->data));
1.1 misho 229: CK((*filter->output_function)(((c >> 12) & 0x3f) | 0x80, filter->data));
230: CK((*filter->output_function)(((c >> 6) & 0x3f) | 0x80, filter->data));
231: CK((*filter->output_function)((c & 0x3f) | 0x80, filter->data));
232: }
233: } else {
234: if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
235: CK(mbfl_filt_conv_illegal_output(c, filter));
236: }
237: }
238:
239: return c;
240: }
241:
1.1.1.2 misho 242: int mbfl_filt_ident_utf8(int c, mbfl_identify_filter *filter)
1.1 misho 243: {
1.1.1.2 misho 244: int c1;
245:
246: c1 = (filter->status >> 8) & 0xff;
247: filter->status &= 0xff;
248:
1.1 misho 249: if (c < 0x80) {
250: if (c < 0) {
251: filter->flag = 1; /* bad */
252: } else if (filter->status) {
253: filter->flag = 1; /* bad */
254: }
255: filter->status = 0;
256: } else if (c < 0xc0) {
257: switch (filter->status) {
258: case 0x20: /* 3 byte code 2nd char */
1.1.1.2 misho 259: if ((c1 == 0x0 && c >= 0xa0) ||
260: (c1 == 0xd && c < 0xa0) ||
261: (c1 > 0x0 && c1 != 0xd)) {
262: filter->status++;
263: } else {
264: filter->flag = 1; /* bad */
265: filter->status = 0;
266: }
267: break;
1.1 misho 268: case 0x30: /* 4 byte code 2nd char */
1.1.1.2 misho 269: if ((c1 == 0x0 && c >= 0x90) ||
270: (c1 > 0x0 && c1 < 0x4) ||
271: (c1 == 0x4 && c < 0x90)) {
272: filter->status++;
273: } else {
274: filter->flag = 1; /* bad */
275: filter->status = 0;
276: }
277: break;
1.1 misho 278: case 0x31: /* 4 byte code 3rd char */
279: filter->status++;
280: break;
281: case 0x10: /* 2 byte code 2nd char */
282: case 0x21: /* 3 byte code 3rd char */
283: case 0x32: /* 4 byte code 4th char */
284: filter->status = 0;
285: break;
286: default:
287: filter->flag = 1; /* bad */
288: filter->status = 0;
289: break;
290: }
1.1.1.2 misho 291: } else if (c < 0xc2) { /* 0xc0,0xc1 */
292: filter->flag = 1; /* bad */
293: filter->status = 0;
1.1 misho 294: } else {
295: if (filter->status) {
296: filter->flag = 1; /* bad */
297: }
298: filter->status = 0;
299: if (c < 0xe0) { /* 2 byte code first char */
300: filter->status = 0x10;
301: } else if (c < 0xf0) { /* 3 byte code 1st char */
302: filter->status = 0x20;
1.1.1.2 misho 303: filter->status |= (c & 0xf) << 8;
304: } else if (c < 0xf5) { /* 4 byte code 1st char */
1.1 misho 305: filter->status = 0x30;
1.1.1.2 misho 306: filter->status |= (c & 0x7) << 8;
1.1 misho 307: } else {
308: filter->flag = 1; /* bad */
309: }
310: }
311:
312: return c;
313: }
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