Annotation of embedaddon/php/ext/mbstring/libmbfl/filters/mbfilter_utf8.c, revision 1.1.1.2
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,
82: mbfl_filt_conv_common_flush
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:
96: /*
97: * UTF-8 => wchar
98: */
99: int mbfl_filt_conv_utf8_wchar(int c, mbfl_convert_filter *filter)
100: {
1.1.1.2 ! misho 101: int s, c1, w = 0, flag = 0;
1.1 misho 102:
103: if (c < 0x80) {
1.1.1.2 ! misho 104: if (filter->status != 0) {
! 105: w = (filter->cache & MBFL_WCSGROUP_MASK) | MBFL_WCSGROUP_THROUGH;
! 106: CK((*filter->output_function)(w, filter->data));
! 107: filter->status = 0;
! 108: filter->cache = 0;
! 109: }
1.1 misho 110: if (c >= 0) {
111: CK((*filter->output_function)(c, filter->data));
112: }
113: } else if (c < 0xc0) {
114: int status = filter->status & 0xff;
115: switch (status) {
1.1.1.2 ! misho 116: case 0x10: /* 2byte code 2nd char: 0x80-0xbf */
! 117: case 0x21: /* 3byte code 3rd char: 0x80-0xbf */
! 118: case 0x32: /* 4byte code 4th char: 0x80-0xbf */
1.1 misho 119: filter->status = 0;
120: s = filter->cache | (c & 0x3f);
1.1.1.2 ! misho 121: filter->cache = 0;
1.1 misho 122: if ((status == 0x10 && s >= 0x80) ||
123: (status == 0x21 && s >= 0x800 && (s < 0xd800 || s > 0xdfff)) ||
1.1.1.2 ! misho 124: (status == 0x32 && s >= 0x10000 && s < 0x110000)) {
1.1 misho 125: CK((*filter->output_function)(s, filter->data));
1.1.1.2 ! misho 126: } else {
! 127: w = s & MBFL_WCSGROUP_MASK;
! 128: flag = 1;
1.1 misho 129: }
130: break;
1.1.1.2 ! misho 131: case 0x20: /* 3byte code 2nd char: 0:0xa0-0xbf,D:0x80-9F,1-C,E-F:0x80-0x9f */
! 132: s = filter->cache | ((c & 0x3f) << 6);
! 133: c1 = (s >> 12) & 0xf;
! 134: if ((c1 == 0x0 && c >= 0xa0) ||
! 135: (c1 == 0xd && c < 0xa0) ||
! 136: (c1 > 0x0 && c1 != 0xd)) {
! 137: filter->cache = s;
! 138: filter->status++;
! 139: } else {
! 140: w = s & MBFL_WCSGROUP_MASK;
! 141: flag = 1;
! 142: }
1.1 misho 143: break;
1.1.1.2 ! misho 144: case 0x31: /* 4byte code 3rd char: 0x80-0xbf */
! 145: filter->cache |= ((c & 0x3f) << 6);
1.1 misho 146: filter->status++;
147: break;
1.1.1.2 ! misho 148: case 0x30: /* 4byte code 2nd char: 0:0x90-0xbf,1-3:0x80-0xbf,4:0x80-0x8f */
! 149: s = filter->cache | ((c & 0x3f) << 12);
! 150: c1 = (s >> 18) & 0x7;
! 151: if ((c1 == 0x0 && c >= 0x90) ||
! 152: (c1 > 0x0 && c1 < 0x4) ||
! 153: (c1 == 0x4 && c < 0x90)) {
! 154: filter->cache = s;
! 155: filter->status++;
! 156: } else {
! 157: w = s & MBFL_WCSGROUP_MASK;
! 158: flag = 1;
! 159: }
1.1 misho 160: break;
161: default:
1.1.1.2 ! misho 162: w = c & MBFL_WCSGROUP_MASK;
! 163: flag = 1;
1.1 misho 164: break;
165: }
1.1.1.2 ! misho 166: } else if (c < 0xc2) { /* invalid: 0xc0,0xc1 */
! 167: w = c & MBFL_WCSGROUP_MASK;
! 168: flag = 1;
! 169: } else if (c < 0xe0) { /* 2byte code first char: 0xc2-0xdf */
! 170: if (filter->status == 0x0) {
! 171: filter->status = 0x10;
! 172: filter->cache = (c & 0x1f) << 6;
! 173: } else {
! 174: w = c & MBFL_WCSGROUP_MASK;
! 175: flag = 1;
! 176: }
! 177: } else if (c < 0xf0) { /* 3byte code first char: 0xe0-0xef */
! 178: if (filter->status == 0x0) {
! 179: filter->status = 0x20;
! 180: filter->cache = (c & 0xf) << 12;
! 181: } else {
! 182: w = c & MBFL_WCSGROUP_MASK;
! 183: flag = 1;
! 184: }
! 185: } else if (c < 0xf5) { /* 4byte code first char: 0xf0-0xf4 */
! 186: if (filter->status == 0x0) {
! 187: filter->status = 0x30;
! 188: filter->cache = (c & 0x7) << 18;
! 189: } else {
! 190: w = c & MBFL_WCSGROUP_MASK;
! 191: flag = 1;
! 192: }
1.1 misho 193: } else {
1.1.1.2 ! misho 194: w = c & MBFL_WCSGROUP_MASK;
! 195: flag = 1;
! 196: }
! 197:
! 198: if (flag) {
! 199: w |= MBFL_WCSGROUP_THROUGH;
! 200: CK((*filter->output_function)(w, filter->data));
1.1 misho 201: filter->status = 0;
202: filter->cache = 0;
203: }
204:
205: return c;
206: }
207:
208: /*
209: * wchar => UTF-8
210: */
211: int mbfl_filt_conv_wchar_utf8(int c, mbfl_convert_filter *filter)
212: {
1.1.1.2 ! misho 213: if (c >= 0 && c < 0x110000) {
1.1 misho 214: if (c < 0x80) {
215: CK((*filter->output_function)(c, filter->data));
216: } else if (c < 0x800) {
217: CK((*filter->output_function)(((c >> 6) & 0x1f) | 0xc0, filter->data));
218: CK((*filter->output_function)((c & 0x3f) | 0x80, filter->data));
219: } else if (c < 0x10000) {
220: CK((*filter->output_function)(((c >> 12) & 0x0f) | 0xe0, filter->data));
221: CK((*filter->output_function)(((c >> 6) & 0x3f) | 0x80, filter->data));
222: CK((*filter->output_function)((c & 0x3f) | 0x80, filter->data));
223: } else {
1.1.1.2 ! misho 224: CK((*filter->output_function)(((c >> 18) & 0x07) | 0xf0, filter->data));
1.1 misho 225: CK((*filter->output_function)(((c >> 12) & 0x3f) | 0x80, filter->data));
226: CK((*filter->output_function)(((c >> 6) & 0x3f) | 0x80, filter->data));
227: CK((*filter->output_function)((c & 0x3f) | 0x80, filter->data));
228: }
229: } else {
230: if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
231: CK(mbfl_filt_conv_illegal_output(c, filter));
232: }
233: }
234:
235: return c;
236: }
237:
1.1.1.2 ! misho 238: int mbfl_filt_ident_utf8(int c, mbfl_identify_filter *filter)
1.1 misho 239: {
1.1.1.2 ! misho 240: int c1;
! 241:
! 242: c1 = (filter->status >> 8) & 0xff;
! 243: filter->status &= 0xff;
! 244:
1.1 misho 245: if (c < 0x80) {
246: if (c < 0) {
247: filter->flag = 1; /* bad */
248: } else if (filter->status) {
249: filter->flag = 1; /* bad */
250: }
251: filter->status = 0;
252: } else if (c < 0xc0) {
253: switch (filter->status) {
254: case 0x20: /* 3 byte code 2nd char */
1.1.1.2 ! misho 255: if ((c1 == 0x0 && c >= 0xa0) ||
! 256: (c1 == 0xd && c < 0xa0) ||
! 257: (c1 > 0x0 && c1 != 0xd)) {
! 258: filter->status++;
! 259: } else {
! 260: filter->flag = 1; /* bad */
! 261: filter->status = 0;
! 262: }
! 263: break;
1.1 misho 264: case 0x30: /* 4 byte code 2nd char */
1.1.1.2 ! misho 265: if ((c1 == 0x0 && c >= 0x90) ||
! 266: (c1 > 0x0 && c1 < 0x4) ||
! 267: (c1 == 0x4 && c < 0x90)) {
! 268: filter->status++;
! 269: } else {
! 270: filter->flag = 1; /* bad */
! 271: filter->status = 0;
! 272: }
! 273: break;
1.1 misho 274: case 0x31: /* 4 byte code 3rd char */
275: filter->status++;
276: break;
277: case 0x10: /* 2 byte code 2nd char */
278: case 0x21: /* 3 byte code 3rd char */
279: case 0x32: /* 4 byte code 4th char */
280: filter->status = 0;
281: break;
282: default:
283: filter->flag = 1; /* bad */
284: filter->status = 0;
285: break;
286: }
1.1.1.2 ! misho 287: } else if (c < 0xc2) { /* 0xc0,0xc1 */
! 288: filter->flag = 1; /* bad */
! 289: filter->status = 0;
1.1 misho 290: } else {
291: if (filter->status) {
292: filter->flag = 1; /* bad */
293: }
294: filter->status = 0;
295: if (c < 0xe0) { /* 2 byte code first char */
296: filter->status = 0x10;
297: } else if (c < 0xf0) { /* 3 byte code 1st char */
298: filter->status = 0x20;
1.1.1.2 ! misho 299: filter->status |= (c & 0xf) << 8;
! 300: } else if (c < 0xf5) { /* 4 byte code 1st char */
1.1 misho 301: filter->status = 0x30;
1.1.1.2 ! misho 302: filter->status |= (c & 0x7) << 8;
1.1 misho 303: } else {
304: filter->flag = 1; /* bad */
305: }
306: }
307:
308: return c;
309: }
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