Annotation of embedaddon/php/ext/mbstring/libmbfl/filters/mbfilter_gb18030.c, revision 1.1
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_cp936.c
! 26: * by rui hirokawa <hirokawa@php.net> on 11 Aug 2011.
! 27: *
! 28: */
! 29:
! 30: #ifdef HAVE_CONFIG_H
! 31: #include "config.h"
! 32: #endif
! 33:
! 34: #include "mbfilter.h"
! 35: #include "mbfilter_gb18030.h"
! 36:
! 37: #include "unicode_table_cp936.h"
! 38: #include "unicode_table_gb18030.h"
! 39:
! 40: static int mbfl_filt_ident_gb18030(int c, mbfl_identify_filter *filter);
! 41:
! 42: static const char *mbfl_encoding_gb18030_aliases[] = {"gb-18030", "gb-18030-2000", NULL};
! 43:
! 44: const mbfl_encoding mbfl_encoding_gb18030 = {
! 45: mbfl_no_encoding_gb18030,
! 46: "GB18030",
! 47: "GB18030",
! 48: (const char *(*)[])&mbfl_encoding_gb18030_aliases,
! 49: NULL,
! 50: MBFL_ENCTYPE_MBCS | MBFL_ENCTYPE_GL_UNSAFE
! 51: };
! 52:
! 53: const struct mbfl_identify_vtbl vtbl_identify_gb18030 = {
! 54: mbfl_no_encoding_gb18030,
! 55: mbfl_filt_ident_common_ctor,
! 56: mbfl_filt_ident_common_dtor,
! 57: mbfl_filt_ident_gb18030
! 58: };
! 59:
! 60: const struct mbfl_convert_vtbl vtbl_gb18030_wchar = {
! 61: mbfl_no_encoding_gb18030,
! 62: mbfl_no_encoding_wchar,
! 63: mbfl_filt_conv_common_ctor,
! 64: mbfl_filt_conv_common_dtor,
! 65: mbfl_filt_conv_gb18030_wchar,
! 66: mbfl_filt_conv_common_flush
! 67: };
! 68:
! 69: const struct mbfl_convert_vtbl vtbl_wchar_gb18030 = {
! 70: mbfl_no_encoding_wchar,
! 71: mbfl_no_encoding_gb18030,
! 72: mbfl_filt_conv_common_ctor,
! 73: mbfl_filt_conv_common_dtor,
! 74: mbfl_filt_conv_wchar_gb18030,
! 75: mbfl_filt_conv_common_flush
! 76: };
! 77:
! 78: #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
! 79:
! 80:
! 81: int
! 82: mbfl_bisec_srch(int w, const unsigned short *tbl, int n)
! 83: {
! 84: int k, k1 = 0, k2 = n-1;
! 85:
! 86: while (k1 < k2) {
! 87: k = (k1+k2) >> 1;
! 88: if (w <= tbl[2*k+1]) {
! 89: k2 = k;
! 90: } else if (w >= tbl[2*k+2]) {
! 91: k1 = k + 1;
! 92: } else {
! 93: return -1;
! 94: }
! 95: }
! 96: return k1;
! 97: }
! 98:
! 99: int
! 100: mbfl_bisec_srch2(int w, const unsigned short tbl[], int n)
! 101: {
! 102: int k, k1 = 0, k2 = n;
! 103:
! 104: if (w == tbl[0]) {
! 105: return 0;
! 106: }
! 107:
! 108: while (k2 - k1 > 1) {
! 109: k = (k1 + k2) >> 1;
! 110: if (w < tbl[k]) {
! 111: k2 = k;
! 112: } else if (w > tbl[k]) {
! 113: k1 = k;
! 114: } else {
! 115: return k;
! 116: }
! 117: }
! 118: return -1;
! 119: }
! 120:
! 121: /*
! 122: * GB18030 => wchar
! 123: */
! 124: int
! 125: mbfl_filt_conv_gb18030_wchar(int c, mbfl_convert_filter *filter)
! 126: {
! 127: int k;
! 128: int c1, c2, c3, w = -1;
! 129:
! 130: switch (filter->status) {
! 131: case 0:
! 132: if (c >= 0 && c < 0x80) { /* latin */
! 133: CK((*filter->output_function)(c, filter->data));
! 134: } else if (c == 0x80) { /* euro sign */
! 135: CK((*filter->output_function)(0x20ac, filter->data));
! 136: } else if (c == 0xff) {
! 137: CK((*filter->output_function)(0x00ff, filter->data));
! 138: } else if (c > 0x80 && c < 0xff) { /* dbcs/qbcs lead byte */
! 139: filter->status = 1;
! 140: filter->cache = c;
! 141: } else {
! 142: w = c & MBFL_WCSGROUP_MASK;
! 143: w |= MBFL_WCSGROUP_THROUGH;
! 144: CK((*filter->output_function)(w, filter->data));
! 145: }
! 146: break;
! 147:
! 148: case 1: /* dbcs/qbcs second byte */
! 149: c1 = filter->cache;
! 150: filter->status = 0;
! 151:
! 152: if (c1 >= 0x81 && c1 <= 0x84 && c >= 0x30 && c <= 0x39) { /* 4 byte range: Unicode BMP */
! 153: filter->status = 2;
! 154: filter->cache = (c1 << 8) | c;
! 155: return c;
! 156: } else if (c1 >= 0x90 && c1 <= 0xe3 && c >= 0x30 && c <= 0x39) {
! 157: /* 4 byte range: Unicode 16 planes */
! 158: filter->status = 2;
! 159: filter->cache = (c1 << 8) | c;
! 160: return c;
! 161: } else if (((c1 >= 0xaa && c1 <= 0xaf) || (c1 >= 0xf8 && c1 <= 0xfe)) &&
! 162: (c >= 0xa1 && c <= 0xfe)) { /* UDA part1,2: U+E000-U+E4C5 */
! 163: w = 94*(c1 >= 0xf8 ? c1 - 0xf2 : c1 - 0xaa) + (c - 0xa1) + 0xe000;
! 164: CK((*filter->output_function)(w, filter->data));
! 165: } else if (c1 >= 0xa1 && c1 <= 0xa7 && c >= 0x40 && c < 0xa1 && c != 0x7f) {
! 166: /* UDA part3 : U+E4C6-U+E765*/
! 167: w = 96*(c1 - 0xa1) + c - (c >= 0x80 ? 0x41 : 0x40) + 0xe4c6;
! 168: CK((*filter->output_function)(w, filter->data));
! 169: }
! 170:
! 171: c2 = (c1 << 8) | c;
! 172:
! 173: if (w <= 0 &&
! 174: ((c2 >= 0xa2ab && c2 <= 0xa9f0 + (0xe80f-0xe801)) ||
! 175: (c2 >= 0xd7fa && c2 <= 0xd7fa + (0xe814-0xe810)) ||
! 176: (c2 >= 0xfe50 && c2 <= 0xfe80 + (0xe864-0xe844)))) {
! 177: for (k = 0; k < mbfl_gb18030_pua_tbl_max; k++) {
! 178: if (c2 >= mbfl_gb18030_pua_tbl[k][2] &&
! 179: c2 <= mbfl_gb18030_pua_tbl[k][2] + mbfl_gb18030_pua_tbl[k][1]
! 180: - mbfl_gb18030_pua_tbl[k][0]) {
! 181: w = c2 - mbfl_gb18030_pua_tbl[k][2] + mbfl_gb18030_pua_tbl[k][0];
! 182: CK((*filter->output_function)(w, filter->data));
! 183: break;
! 184: }
! 185: }
! 186: }
! 187:
! 188: if (w <= 0) {
! 189: if ((c1 >= 0xa1 && c1 <= 0xa9 && c >= 0xa1 && c <= 0xfe) ||
! 190: (c1 >= 0xb0 && c1 <= 0xf7 && c >= 0xa1 && c <= 0xfe) ||
! 191: (c1 >= 0x81 && c1 <= 0xa0 && c >= 0x40 && c <= 0xfe && c != 0x7f) ||
! 192: (c1 >= 0xaa && c1 <= 0xfe && c >= 0x40 && c <= 0xa0 && c != 0x7f) ||
! 193: (c1 >= 0xa8 && c1 <= 0xa9 && c >= 0x40 && c <= 0xa0 && c != 0x7f)) {
! 194: w = (c1 - 0x81)*192 + (c - 0x40);
! 195: if (w >= 0 && w < cp936_ucs_table_size) {
! 196: w = cp936_ucs_table[w];
! 197: } else {
! 198: w = 0;
! 199: }
! 200: if (w <= 0) {
! 201: w = (c1 << 8) | c;
! 202: w &= MBFL_WCSPLANE_MASK;
! 203: w |= MBFL_WCSPLANE_GB18030;
! 204: }
! 205: CK((*filter->output_function)(w, filter->data));
! 206: } else if ((c >= 0 && c < 0x21) || c == 0x7f) { /* CTLs */
! 207: CK((*filter->output_function)(c, filter->data));
! 208: } else {
! 209: w = (c1 << 8) | c;
! 210: w &= MBFL_WCSGROUP_MASK;
! 211: w |= MBFL_WCSGROUP_THROUGH;
! 212: CK((*filter->output_function)(w, filter->data));
! 213: }
! 214: }
! 215: break;
! 216: case 2: /* qbcs third byte */
! 217: c1 = (filter->cache >> 8) & 0xff;
! 218: c2 = filter->cache & 0xff;
! 219: filter->status = 0;
! 220: filter->cache = 0;
! 221: if (((c1 >= 0x81 && c1 <= 0x84) || (c1 >= 0x90 && c1 <= 0xe3)) &&
! 222: c2 >= 0x30 && c2 <= 0x39 && c >= 0x81 && c <= 0xfe) {
! 223: filter->cache = (c1 << 16) | (c2 << 8) | c;
! 224: filter->status = 3;
! 225: } else {
! 226: w = (c1 << 16) | (c2 << 8) | c;
! 227: w &= MBFL_WCSGROUP_MASK;
! 228: w |= MBFL_WCSGROUP_THROUGH;
! 229: CK((*filter->output_function)(w, filter->data));
! 230: }
! 231: break;
! 232:
! 233: case 3: /* qbcs fourth byte */
! 234: c1 = (filter->cache >> 16) & 0xff;
! 235: c2 = (filter->cache >> 8) & 0xff;
! 236: c3 = filter->cache & 0xff;
! 237: filter->status = 0;
! 238: filter->cache = 0;
! 239: if (((c1 >= 0x81 && c1 <= 0x84) || (c1 >= 0x90 && c1 <= 0xe3)) &&
! 240: c2 >= 0x30 && c2 <= 0x39 && c3 >= 0x81 && c3 <= 0xfe && c >= 0x30 && c <= 0x39) {
! 241: if (c1 >= 0x90 && c1 <= 0xe3) {
! 242: w = ((c1 - 0x90)*10 + (c2 - 0x30)*126 + (c3 - 0x81))*10 + (c - 0x30) + 0x10000;
! 243: } else { /* Unicode BMP */
! 244: w = (((c1 - 0x81)*10 + (c2 - 0x30))*126 + (c3 - 0x81))*10 + (c - 0x30);
! 245: if (w >= 0 && w <= 39419) {
! 246: k = mbfl_bisec_srch(w, mbfl_gb2uni_tbl, mbfl_gb_uni_max);
! 247: if (k<0) {
! 248: /* error */
! 249: w = (c1 << 24) | (c2 << 16) | (c3 << 8) | c;
! 250: w &= MBFL_WCSGROUP_MASK;
! 251: w |= MBFL_WCSGROUP_THROUGH;
! 252: CK((*filter->output_function)(w, filter->data));
! 253: return c;
! 254: }
! 255: w += mbfl_gb_uni_ofst[k];
! 256: } else {
! 257: w = (c1 << 24) | (c2 << 16) | (c3 << 8) | c;
! 258: w &= MBFL_WCSGROUP_MASK;
! 259: w |= MBFL_WCSGROUP_THROUGH;
! 260: CK((*filter->output_function)(w, filter->data));
! 261: return c;
! 262: }
! 263: }
! 264: CK((*filter->output_function)(w, filter->data));
! 265: } else {
! 266: w = (c1 << 24) | (c2 << 16) | (c3 << 8) | c;
! 267: w &= MBFL_WCSGROUP_MASK;
! 268: w |= MBFL_WCSGROUP_THROUGH;
! 269: CK((*filter->output_function)(w, filter->data));
! 270: }
! 271: break;
! 272:
! 273: default:
! 274: filter->status = 0;
! 275: break;
! 276: }
! 277:
! 278: return c;
! 279: }
! 280:
! 281: /*
! 282: * wchar => GB18030
! 283: */
! 284: int
! 285: mbfl_filt_conv_wchar_gb18030(int c, mbfl_convert_filter *filter)
! 286: {
! 287: int k, k1, k2;
! 288: int c1, s = 0, s1 = 0;
! 289:
! 290: if (c >= ucs_a1_cp936_table_min && c < ucs_a1_cp936_table_max) {
! 291: s = ucs_a1_cp936_table[c - ucs_a1_cp936_table_min];
! 292: } else if (c >= ucs_a2_cp936_table_min && c < ucs_a2_cp936_table_max) {
! 293: s = ucs_a2_cp936_table[c - ucs_a2_cp936_table_min];
! 294: } else if (c >= ucs_a3_cp936_table_min && c < ucs_a3_cp936_table_max) {
! 295: s = ucs_a3_cp936_table[c - ucs_a3_cp936_table_min];
! 296: } else if (c >= ucs_i_cp936_table_min && c < ucs_i_cp936_table_max) {
! 297: s = ucs_i_cp936_table[c - ucs_i_cp936_table_min];
! 298: } else if (c >= ucs_ci_cp936_table_min && c < ucs_ci_cp936_table_max) {
! 299: /* U+F900-FA2F CJK Compatibility Ideographs */
! 300: if (c == 0xf92c) {
! 301: s = 0xfd9c;
! 302: } else if (c == 0xf979) {
! 303: s = 0xfd9d;
! 304: } else if (c == 0xf995) {
! 305: s = 0xfd9e;
! 306: } else if (c == 0xf9e7) {
! 307: s = 0xfd9f;
! 308: } else if (c == 0xf9f1) {
! 309: s = 0xfda0;
! 310: } else if (c >= 0xfa0c && c <= 0xfa29) {
! 311: s = ucs_ci_s_cp936_table[c - 0xfa0c];
! 312: }
! 313: } else if (c >= ucs_cf_cp936_table_min && c < ucs_cf_cp936_table_max) {
! 314: /* FE30h CJK Compatibility Forms */
! 315: s = ucs_cf_cp936_table[c - ucs_cf_cp936_table_min];
! 316: } else if (c >= ucs_sfv_cp936_table_min && c < ucs_sfv_cp936_table_max) {
! 317: /* U+FE50-FE6F Small Form Variants */
! 318: s = ucs_sfv_cp936_table[c - ucs_sfv_cp936_table_min];
! 319: } else if (c >= ucs_hff_cp936_table_min && c < ucs_hff_cp936_table_max) {
! 320: /* U+FF00-FFFF HW/FW Forms */
! 321: if (c == 0xff04) {
! 322: s = 0xa1e7;
! 323: } else if (c == 0xff5e) {
! 324: s = 0xa1ab;
! 325: } else if (c >= 0xff01 && c <= 0xff5d) {
! 326: s = c - 0xff01 + 0xa3a1;
! 327: } else if (c >= 0xffe0 && c <= 0xffe5) {
! 328: s = ucs_hff_s_cp936_table[c-0xffe0];
! 329: }
! 330: }
! 331:
! 332: if (c == 0x20ac) { /* euro-sign */
! 333: s = 0xa2e3;
! 334: }
! 335:
! 336: if (s <= 0 && c >= mbfl_gb18030_c_tbl_key[0] &&
! 337: c <= mbfl_gb18030_c_tbl_key[mbfl_gb18030_c_tbl_max-1]) {
! 338: k1 = mbfl_bisec_srch2(c, mbfl_gb18030_c_tbl_key, mbfl_gb18030_c_tbl_max);
! 339: if (k1 >= 0) {
! 340: s = mbfl_gb18030_c_tbl_val[k1];
! 341: }
! 342: }
! 343:
! 344: if (c >= 0xe000 && c <= 0xe864) { /* PUA */
! 345: if (c < 0xe766) {
! 346: if (c < 0xe4c6) {
! 347: c1 = c - 0xe000;
! 348: s = (c1 % 94) + 0xa1; c1 /= 94;
! 349: s |= (c1 < 0x06 ? c1 + 0xaa : c1 + 0xf2) << 8;
! 350: } else {
! 351: c1 = c - 0xe4c6;
! 352: s = ((c1 / 96) + 0xa1) << 8; c1 %= 96;
! 353: s |= c1 + (c1 >= 0x3f ? 0x41 : 0x40);
! 354: }
! 355: } else {
! 356: /* U+E766..U+E864 */
! 357: k1 = 0; k2 = mbfl_gb18030_pua_tbl_max;
! 358: while (k1 < k2) {
! 359: k = (k1 + k2) >> 1;
! 360: if (c < mbfl_gb18030_pua_tbl[k][0]) {
! 361: k2 = k;
! 362: } else if (c > mbfl_gb18030_pua_tbl[k][1]) {
! 363: k1 = k + 1;
! 364: } else {
! 365: s = c - mbfl_gb18030_pua_tbl[k][0] + mbfl_gb18030_pua_tbl[k][2];
! 366: break;
! 367: }
! 368: }
! 369: }
! 370: }
! 371:
! 372: if (s <= 0 && c >= 0x0080 && c <= 0xffff) { /* BMP */
! 373: s = mbfl_bisec_srch(c, mbfl_uni2gb_tbl, mbfl_gb_uni_max);
! 374: if (s >= 0) {
! 375: c1 = c - mbfl_gb_uni_ofst[s];
! 376: s = (c1 % 10) + 0x30; c1 /= 10;
! 377: s |= ((c1 % 126) + 0x81) << 8; c1 /= 126;
! 378: s |= ((c1 % 10) + 0x30) << 16; c1 /= 10;
! 379: s1 = c1 + 0x81;
! 380: }
! 381: } else if (c >= 0x10000 && c <= 0x10ffff) { /* Code set 3: Unicode U+10000..U+10FFFF */
! 382: c1 = c - 0x10000;
! 383: s = (c1 % 10) + 0x30; c1 /= 10;
! 384: s |= ((c1 % 126) + 0x81) << 8; c1 /= 126;
! 385: s |= ((c1 % 10) + 0x30) << 16; c1 /= 10;
! 386: s1 = c1 + 0x90;
! 387: }
! 388:
! 389: if (s <= 0) {
! 390: c1 = c & ~MBFL_WCSPLANE_MASK;
! 391: if (c1 == MBFL_WCSPLANE_WINCP936) {
! 392: s = c & MBFL_WCSPLANE_MASK;
! 393: }
! 394: if (c == 0) {
! 395: s = 0;
! 396: } else if (s <= 0) {
! 397: s = -1;
! 398: }
! 399: }
! 400: if (s >= 0) {
! 401: if (s <= 0x80) { /* latin */
! 402: CK((*filter->output_function)(s, filter->data));
! 403: } else if (s1 > 0) { /* qbcs */
! 404: CK((*filter->output_function)(s1 & 0xff, filter->data));
! 405: CK((*filter->output_function)((s >> 16) & 0xff, filter->data));
! 406: CK((*filter->output_function)((s >> 8) & 0xff, filter->data));
! 407: CK((*filter->output_function)(s & 0xff, filter->data));
! 408: } else { /* dbcs */
! 409: CK((*filter->output_function)((s >> 8) & 0xff, filter->data));
! 410: CK((*filter->output_function)(s & 0xff, filter->data));
! 411: }
! 412: } else {
! 413: if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
! 414: CK(mbfl_filt_conv_illegal_output(c, filter));
! 415: }
! 416: }
! 417:
! 418: return c;
! 419: }
! 420:
! 421: static int mbfl_filt_ident_gb18030(int c, mbfl_identify_filter *filter)
! 422: {
! 423: int c1;
! 424:
! 425: c1 = (filter->status >> 8) & 0xff;
! 426: filter->status &= 0xff;
! 427:
! 428: if (filter->status == 0) {
! 429: if (c <= 0x80 || c == 0xff) {
! 430: filter->status = 0;
! 431: } else {
! 432: filter->status = 1;
! 433: filter->status |= (c << 8);
! 434: }
! 435: } else if (filter->status == 1) { /* dbcs/qbcs 2nd byte */
! 436: if (((c1 >= 0x81 && c1 <= 0x84) || (c1 >= 0x90 && c1 <= 0xe3)) && c >= 0x30 && c <= 0x39) { /* qbcs */
! 437: filter->status = 2;
! 438: } else if (((c1 >= 0xaa && c1 <= 0xaf) || (c1 >= 0xf8 && c1 <= 0xfe)) && (c >= 0xa1 && c <= 0xfe)) {
! 439: filter->status = 0; /* UDA part 1,2 */
! 440: } else if (c1 >= 0xa1 && c1 <= 0xa7 && c >= 0x40 && c < 0xa1 && c != 0x7f) {
! 441: filter->status = 0; /* UDA part 3 */
! 442: } else if ((c1 >= 0xa1 && c1 <= 0xa9 && c >= 0xa1 && c <= 0xfe) ||
! 443: (c1 >= 0xb0 && c1 <= 0xf7 && c >= 0xa1 && c <= 0xfe) ||
! 444: (c1 >= 0x81 && c1 <= 0xa0 && c >= 0x40 && c <= 0xfe && c != 0x7f) ||
! 445: (c1 >= 0xaa && c1 <= 0xfe && c >= 0x40 && c <= 0xa0 && c != 0x7f) ||
! 446: (c1 >= 0xa8 && c1 <= 0xa9 && c >= 0x40 && c <= 0xa0 && c != 0x7f)) {
! 447: filter->status = 0; /* DBCS */
! 448: } else {
! 449: filter->flag = 1; /* bad */
! 450: filter->status = 0;
! 451: }
! 452: } else if (filter->status == 2) { /* qbcs 3rd byte */
! 453: if (c > 0x80 && c < 0xff) {
! 454: filter->status = 3;
! 455: } else {
! 456: filter->flag = 1; /* bad */
! 457: filter->status = 0;
! 458: }
! 459: } else if (filter->status == 3) { /* qbcs 4th byte */
! 460: if (c >= 0x30 && c < 0x40) {
! 461: filter->status = 0;
! 462: } else {
! 463: filter->flag = 1; /* bad */
! 464: filter->status = 0;
! 465: }
! 466: } else { /* bad */
! 467: filter->flag = 1;
! 468: }
! 469:
! 470: return c;
! 471: }
! 472:
! 473:
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