Annotation of embedaddon/php/ext/mbstring/libmbfl/filters/mbfilter_cp936.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_cn.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_cp936.h"
1.1.1.2 ! misho 36: #define UNICODE_TABLE_CP936_DEF
1.1 misho 37: #include "unicode_table_cp936.h"
38:
39: static int mbfl_filt_ident_cp936(int c, mbfl_identify_filter *filter);
40:
41: static const unsigned char mblen_table_cp936[] = { /* 0x81-0xFE */
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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
51: 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
52: 2, 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: static const char *mbfl_encoding_cp936_aliases[] = {"CP-936", "GBK", NULL};
61:
62: const mbfl_encoding mbfl_encoding_cp936 = {
63: mbfl_no_encoding_cp936,
64: "CP936",
65: "CP936",
66: (const char *(*)[])&mbfl_encoding_cp936_aliases,
67: mblen_table_cp936,
1.1.1.2 ! misho 68: MBFL_ENCTYPE_MBCS | MBFL_ENCTYPE_GL_UNSAFE
1.1 misho 69: };
70:
71: const struct mbfl_identify_vtbl vtbl_identify_cp936 = {
72: mbfl_no_encoding_cp936,
73: mbfl_filt_ident_common_ctor,
74: mbfl_filt_ident_common_dtor,
75: mbfl_filt_ident_cp936
76: };
77:
78: const struct mbfl_convert_vtbl vtbl_cp936_wchar = {
79: mbfl_no_encoding_cp936,
80: mbfl_no_encoding_wchar,
81: mbfl_filt_conv_common_ctor,
82: mbfl_filt_conv_common_dtor,
83: mbfl_filt_conv_cp936_wchar,
84: mbfl_filt_conv_common_flush
85: };
86:
87: const struct mbfl_convert_vtbl vtbl_wchar_cp936 = {
88: mbfl_no_encoding_wchar,
89: mbfl_no_encoding_cp936,
90: mbfl_filt_conv_common_ctor,
91: mbfl_filt_conv_common_dtor,
92: mbfl_filt_conv_wchar_cp936,
93: mbfl_filt_conv_common_flush
94: };
95:
96:
97: #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
98:
99: /*
100: * CP936 => wchar
101: */
102: int
103: mbfl_filt_conv_cp936_wchar(int c, mbfl_convert_filter *filter)
104: {
1.1.1.2 ! misho 105: int k;
! 106: int c1, c2, w = -1;
1.1 misho 107:
108: switch (filter->status) {
109: case 0:
110: if (c >= 0 && c < 0x80) { /* latin */
111: CK((*filter->output_function)(c, filter->data));
112: } else if (c == 0x80) { /* euro sign */
113: CK((*filter->output_function)(0x20ac, filter->data));
1.1.1.2 ! misho 114: } else if (c < 0xff) { /* dbcs lead byte */
1.1 misho 115: filter->status = 1;
116: filter->cache = c;
1.1.1.2 ! misho 117: } else { /* 0xff */
! 118: CK((*filter->output_function)(0xf8f5, filter->data));
1.1 misho 119: }
120: break;
121:
122: case 1: /* dbcs second byte */
123: filter->status = 0;
124: c1 = filter->cache;
1.1.1.2 ! misho 125:
! 126: if (((c1 >= 0xaa && c1 <= 0xaf) || (c1 >= 0xf8 && c1 <= 0xfe)) &&
! 127: (c >= 0xa1 && c <= 0xfe)) {
! 128: /* UDA part1,2: U+E000-U+E4C5 */
! 129: w = 94*(c1 >= 0xf8 ? c1 - 0xf2 : c1 - 0xaa) + (c - 0xa1) + 0xe000;
! 130: CK((*filter->output_function)(w, filter->data));
! 131: } else if (c1 >= 0xa1 && c1 <= 0xa7 && c >= 0x40 && c < 0xa1 && c != 0x7f) {
! 132: /* UDA part3 : U+E4C6-U+E765*/
! 133: w = 96*(c1 - 0xa1) + c - (c >= 0x80 ? 0x41 : 0x40) + 0xe4c6;
! 134: CK((*filter->output_function)(w, filter->data));
! 135: }
! 136:
! 137: c2 = (c1 << 8) | c;
! 138:
! 139: if (w <= 0 &&
! 140: ((c2 >= 0xa2ab && c2 <= 0xa9f0 + (0xe80f-0xe801)) ||
! 141: (c2 >= 0xd7fa && c2 <= 0xd7fa + (0xe814-0xe810)) ||
! 142: (c2 >= 0xfe50 && c2 <= 0xfe80 + (0xe864-0xe844)))) {
! 143: for (k = 0; k < mbfl_cp936_pua_tbl_max; k++) {
! 144: if (c2 >= mbfl_cp936_pua_tbl[k][2] &&
! 145: c2 <= mbfl_cp936_pua_tbl[k][2] +
! 146: mbfl_cp936_pua_tbl[k][1] - mbfl_cp936_pua_tbl[k][0]) {
! 147: w = c2 - mbfl_cp936_pua_tbl[k][2] + mbfl_cp936_pua_tbl[k][0];
! 148: CK((*filter->output_function)(w, filter->data));
! 149: break;
! 150: }
1.1 misho 151: }
1.1.1.2 ! misho 152: }
! 153:
! 154: if (w <= 0) {
! 155: if (c1 < 0xff && c1 > 0x80 && c > 0x39 && c < 0xff && c != 0x7f) {
! 156: w = (c1 - 0x81)*192 + (c - 0x40);
! 157: if (w >= 0 && w < cp936_ucs_table_size) {
! 158: w = cp936_ucs_table[w];
! 159: } else {
! 160: w = 0;
! 161: }
! 162: if (w <= 0) {
! 163: w = (c1 << 8) | c;
! 164: w &= MBFL_WCSPLANE_MASK;
! 165: w |= MBFL_WCSPLANE_WINCP936;
! 166: }
! 167: CK((*filter->output_function)(w, filter->data));
! 168: } else if ((c >= 0 && c < 0x21) || c == 0x7f) { /* CTLs */
! 169: CK((*filter->output_function)(c, filter->data));
! 170: } else {
1.1 misho 171: w = (c1 << 8) | c;
1.1.1.2 ! misho 172: w &= MBFL_WCSGROUP_MASK;
! 173: w |= MBFL_WCSGROUP_THROUGH;
! 174: CK((*filter->output_function)(w, filter->data));
1.1 misho 175: }
176: }
177: break;
178:
179: default:
180: filter->status = 0;
181: break;
182: }
183:
184: return c;
185: }
186:
187: /*
188: * wchar => CP936
189: */
190: int
191: mbfl_filt_conv_wchar_cp936(int c, mbfl_convert_filter *filter)
192: {
1.1.1.2 ! misho 193: int k, k1, k2;
! 194: int c1, s = 0;
1.1 misho 195:
196: if (c >= ucs_a1_cp936_table_min && c < ucs_a1_cp936_table_max) {
1.1.1.2 ! misho 197: /* U+0000 - U+0451 */
1.1 misho 198: s = ucs_a1_cp936_table[c - ucs_a1_cp936_table_min];
199: } else if (c >= ucs_a2_cp936_table_min && c < ucs_a2_cp936_table_max) {
1.1.1.2 ! misho 200: /* U+2000 - U+26FF */
! 201: if (c == 0x203e) {
! 202: s = 0xa3fe;
! 203: } else if (c == 0x2218) {
! 204: s = 0xa1e3;
! 205: } else if (c == 0x223c) {
! 206: s = 0xa1ab;
! 207: } else {
! 208: s = ucs_a2_cp936_table[c - ucs_a2_cp936_table_min];
! 209: }
1.1 misho 210: } else if (c >= ucs_a3_cp936_table_min && c < ucs_a3_cp936_table_max) {
1.1.1.2 ! misho 211: /* U+2F00 - U+33FF */
1.1 misho 212: s = ucs_a3_cp936_table[c - ucs_a3_cp936_table_min];
213: } else if (c >= ucs_i_cp936_table_min && c < ucs_i_cp936_table_max) {
1.1.1.2 ! misho 214: /* U+4D00-9FFF CJK Unified Ideographs (+ Extension A) */
1.1 misho 215: s = ucs_i_cp936_table[c - ucs_i_cp936_table_min];
1.1.1.2 ! misho 216: } else if (c >= 0xe000 && c <= 0xe864) { /* PUA */
! 217: if (c < 0xe766) {
! 218: if (c < 0xe4c6) {
! 219: c1 = c - 0xe000;
! 220: s = (c1 % 94) + 0xa1; c1 /= 94;
! 221: s |= (c1 < 0x06 ? c1 + 0xaa : c1 + 0xf2) << 8;
! 222: } else {
! 223: c1 = c - 0xe4c6;
! 224: s = ((c1 / 96) + 0xa1) << 8; c1 %= 96;
! 225: s |= c1 + (c1 >= 0x3f ? 0x41 : 0x40);
! 226: }
! 227: } else {
! 228: /* U+E766..U+E864 */
! 229: k1 = 0; k2 = mbfl_cp936_pua_tbl_max;
! 230: while (k1 < k2) {
! 231: k = (k1 + k2) >> 1;
! 232: if (c < mbfl_cp936_pua_tbl[k][0]) {
! 233: k2 = k;
! 234: } else if (c > mbfl_cp936_pua_tbl[k][1]) {
! 235: k1 = k + 1;
! 236: } else {
! 237: s = c - mbfl_cp936_pua_tbl[k][0] + mbfl_cp936_pua_tbl[k][2];
! 238: break;
! 239: }
! 240: }
! 241: }
! 242: } else if (c == 0xf8f5) {
! 243: s = 0xff;
1.1 misho 244: } else if (c >= ucs_ci_cp936_table_min && c < ucs_ci_cp936_table_max) {
1.1.1.2 ! misho 245: /* U+F900-FA2F CJK Compatibility Ideographs */
1.1 misho 246: s = ucs_ci_cp936_table[c - ucs_ci_cp936_table_min];
247: } else if (c >= ucs_cf_cp936_table_min && c < ucs_cf_cp936_table_max) {
248: s = ucs_cf_cp936_table[c - ucs_cf_cp936_table_min];
249: } else if (c >= ucs_sfv_cp936_table_min && c < ucs_sfv_cp936_table_max) {
1.1.1.2 ! misho 250: s = ucs_sfv_cp936_table[c - ucs_sfv_cp936_table_min]; /* U+FE50-FE6F Small Form Variants */
! 251: } else if (c >= ucs_hff_cp936_table_min && c < ucs_hff_cp936_table_max) {
! 252: /* U+FF00-FFFF HW/FW Forms */
! 253: if (c == 0xff04) {
! 254: s = 0xa1e7;
! 255: } else if (c == 0xff5e) {
! 256: s = 0xa1ab;
! 257: } else if (c >= 0xff01 && c <= 0xff5d) {
! 258: s = c - 0xff01 + 0xa3a1;
! 259: } else if (c >= 0xffe0 && c <= 0xffe5) {
! 260: s = ucs_hff_s_cp936_table[c-0xffe0];
! 261: }
1.1 misho 262: }
263: if (s <= 0) {
264: c1 = c & ~MBFL_WCSPLANE_MASK;
265: if (c1 == MBFL_WCSPLANE_WINCP936) {
266: s = c & MBFL_WCSPLANE_MASK;
267: }
268: if (c == 0) {
269: s = 0;
270: } else if (s <= 0) {
271: s = -1;
272: }
273: }
274: if (s >= 0) {
1.1.1.2 ! misho 275: if (s <= 0x80 || s == 0xff) { /* latin */
1.1 misho 276: CK((*filter->output_function)(s, filter->data));
277: } else {
278: CK((*filter->output_function)((s >> 8) & 0xff, filter->data));
279: CK((*filter->output_function)(s & 0xff, filter->data));
280: }
281: } else {
282: if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
283: CK(mbfl_filt_conv_illegal_output(c, filter));
284: }
285: }
286:
287: return c;
288: }
289:
290: static int mbfl_filt_ident_cp936(int c, mbfl_identify_filter *filter)
291: {
292: if (filter->status) { /* kanji second char */
293: if (c < 0x40 || c > 0xfe || c == 0x7f) { /* bad */
294: filter->flag = 1;
295: }
296: filter->status = 0;
297: } else if (c >= 0 && c < 0x80) { /* latin ok */
298: ;
299: } else if (c > 0x80 && c < 0xff) { /* DBCS lead byte */
300: filter->status = 1;
301: } else { /* bad */
302: filter->flag = 1;
303: }
304:
305: return c;
306: }
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