Annotation of embedaddon/php/ext/mbstring/libmbfl/filters/mbfilter_ucs4.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.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_ucs4.h"
! 36:
! 37: static const char *mbfl_encoding_ucs4_aliases[] = {"ISO-10646-UCS-4", "UCS4", NULL};
! 38:
! 39: const mbfl_encoding mbfl_encoding_ucs4 = {
! 40: mbfl_no_encoding_ucs4,
! 41: "UCS-4",
! 42: "UCS-4",
! 43: (const char *(*)[])&mbfl_encoding_ucs4_aliases,
! 44: NULL,
! 45: MBFL_ENCTYPE_WCS4BE
! 46: };
! 47:
! 48: const mbfl_encoding mbfl_encoding_ucs4be = {
! 49: mbfl_no_encoding_ucs4be,
! 50: "UCS-4BE",
! 51: "UCS-4BE",
! 52: NULL,
! 53: NULL,
! 54: MBFL_ENCTYPE_WCS4BE
! 55: };
! 56:
! 57: const mbfl_encoding mbfl_encoding_ucs4le = {
! 58: mbfl_no_encoding_ucs4le,
! 59: "UCS-4LE",
! 60: "UCS-4LE",
! 61: NULL,
! 62: NULL,
! 63: MBFL_ENCTYPE_WCS4LE
! 64: };
! 65:
! 66: const struct mbfl_convert_vtbl vtbl_ucs4_wchar = {
! 67: mbfl_no_encoding_ucs4,
! 68: mbfl_no_encoding_wchar,
! 69: mbfl_filt_conv_common_ctor,
! 70: mbfl_filt_conv_common_dtor,
! 71: mbfl_filt_conv_ucs4_wchar,
! 72: mbfl_filt_conv_common_flush
! 73: };
! 74:
! 75: const struct mbfl_convert_vtbl vtbl_wchar_ucs4 = {
! 76: mbfl_no_encoding_wchar,
! 77: mbfl_no_encoding_ucs4,
! 78: mbfl_filt_conv_common_ctor,
! 79: mbfl_filt_conv_common_dtor,
! 80: mbfl_filt_conv_wchar_ucs4be,
! 81: mbfl_filt_conv_common_flush
! 82: };
! 83:
! 84: const struct mbfl_convert_vtbl vtbl_ucs4be_wchar = {
! 85: mbfl_no_encoding_ucs4be,
! 86: mbfl_no_encoding_wchar,
! 87: mbfl_filt_conv_common_ctor,
! 88: mbfl_filt_conv_common_dtor,
! 89: mbfl_filt_conv_ucs4be_wchar,
! 90: mbfl_filt_conv_common_flush
! 91: };
! 92:
! 93: const struct mbfl_convert_vtbl vtbl_wchar_ucs4be = {
! 94: mbfl_no_encoding_wchar,
! 95: mbfl_no_encoding_ucs4be,
! 96: mbfl_filt_conv_common_ctor,
! 97: mbfl_filt_conv_common_dtor,
! 98: mbfl_filt_conv_wchar_ucs4be,
! 99: mbfl_filt_conv_common_flush
! 100: };
! 101:
! 102: const struct mbfl_convert_vtbl vtbl_ucs4le_wchar = {
! 103: mbfl_no_encoding_ucs4le,
! 104: mbfl_no_encoding_wchar,
! 105: mbfl_filt_conv_common_ctor,
! 106: mbfl_filt_conv_common_dtor,
! 107: mbfl_filt_conv_ucs4le_wchar,
! 108: mbfl_filt_conv_common_flush
! 109: };
! 110:
! 111: const struct mbfl_convert_vtbl vtbl_wchar_ucs4le = {
! 112: mbfl_no_encoding_wchar,
! 113: mbfl_no_encoding_ucs4le,
! 114: mbfl_filt_conv_common_ctor,
! 115: mbfl_filt_conv_common_dtor,
! 116: mbfl_filt_conv_wchar_ucs4le,
! 117: mbfl_filt_conv_common_flush
! 118: };
! 119:
! 120:
! 121: #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
! 122:
! 123: /*
! 124: * UCS-4 => wchar
! 125: */
! 126: int mbfl_filt_conv_ucs4_wchar(int c, mbfl_convert_filter *filter)
! 127: {
! 128: int n, endian;
! 129:
! 130: endian = filter->status & 0xff00;
! 131: switch (filter->status & 0xff) {
! 132: case 0:
! 133: if (endian) {
! 134: n = c & 0xff;
! 135: } else {
! 136: n = (c & 0xff) << 24;
! 137: }
! 138: filter->cache = n;
! 139: filter->status++;
! 140: break;
! 141: case 1:
! 142: if (endian) {
! 143: n = (c & 0xff) << 8;
! 144: } else {
! 145: n = (c & 0xff) << 16;
! 146: }
! 147: filter->cache |= n;
! 148: filter->status++;
! 149: break;
! 150: case 2:
! 151: if (endian) {
! 152: n = (c & 0xff) << 16;
! 153: } else {
! 154: n = (c & 0xff) << 8;
! 155: }
! 156: filter->cache |= n;
! 157: filter->status++;
! 158: break;
! 159: default:
! 160: if (endian) {
! 161: n = (c & 0xff) << 24;
! 162: } else {
! 163: n = c & 0xff;
! 164: }
! 165: n |= filter->cache;
! 166: if ((n & 0xffff) == 0 && ((n >> 16) & 0xffff) == 0xfffe) {
! 167: if (endian) {
! 168: filter->status = 0; /* big-endian */
! 169: } else {
! 170: filter->status = 0x100; /* little-endian */
! 171: }
! 172: CK((*filter->output_function)(0xfeff, filter->data));
! 173: } else {
! 174: filter->status &= ~0xff;
! 175: CK((*filter->output_function)(n, filter->data));
! 176: }
! 177: break;
! 178: }
! 179:
! 180: return c;
! 181: }
! 182:
! 183: /*
! 184: * UCS-4BE => wchar
! 185: */
! 186: int mbfl_filt_conv_ucs4be_wchar(int c, mbfl_convert_filter *filter)
! 187: {
! 188: int n;
! 189:
! 190: if (filter->status == 0) {
! 191: filter->status = 1;
! 192: n = (c & 0xff) << 24;
! 193: filter->cache = n;
! 194: } else if (filter->status == 1) {
! 195: filter->status = 2;
! 196: n = (c & 0xff) << 16;
! 197: filter->cache |= n;
! 198: } else if (filter->status == 2) {
! 199: filter->status = 3;
! 200: n = (c & 0xff) << 8;
! 201: filter->cache |= n;
! 202: } else {
! 203: filter->status = 0;
! 204: n = (c & 0xff) | filter->cache;
! 205: CK((*filter->output_function)(n, filter->data));
! 206: }
! 207: return c;
! 208: }
! 209:
! 210: /*
! 211: * wchar => UCS-4BE
! 212: */
! 213: int mbfl_filt_conv_wchar_ucs4be(int c, mbfl_convert_filter *filter)
! 214: {
! 215: if (c >= 0 && c < MBFL_WCSGROUP_UCS4MAX) {
! 216: CK((*filter->output_function)((c >> 24) & 0xff, filter->data));
! 217: CK((*filter->output_function)((c >> 16) & 0xff, filter->data));
! 218: CK((*filter->output_function)((c >> 8) & 0xff, filter->data));
! 219: CK((*filter->output_function)(c & 0xff, filter->data));
! 220: } else {
! 221: if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
! 222: CK(mbfl_filt_conv_illegal_output(c, filter));
! 223: }
! 224: }
! 225:
! 226: return c;
! 227: }
! 228:
! 229: /*
! 230: * UCS-4LE => wchar
! 231: */
! 232: int mbfl_filt_conv_ucs4le_wchar(int c, mbfl_convert_filter *filter)
! 233: {
! 234: int n;
! 235:
! 236: if (filter->status == 0) {
! 237: filter->status = 1;
! 238: n = (c & 0xff);
! 239: filter->cache = n;
! 240: } else if (filter->status == 1) {
! 241: filter->status = 2;
! 242: n = (c & 0xff) << 8;
! 243: filter->cache |= n;
! 244: } else if (filter->status == 2) {
! 245: filter->status = 3;
! 246: n = (c & 0xff) << 16;
! 247: filter->cache |= n;
! 248: } else {
! 249: filter->status = 0;
! 250: n = ((c & 0xff) << 24) | filter->cache;
! 251: CK((*filter->output_function)(n, filter->data));
! 252: }
! 253: return c;
! 254: }
! 255:
! 256: /*
! 257: * wchar => UCS-4LE
! 258: */
! 259: int mbfl_filt_conv_wchar_ucs4le(int c, mbfl_convert_filter *filter)
! 260: {
! 261: if (c >= 0 && c < MBFL_WCSGROUP_UCS4MAX) {
! 262: CK((*filter->output_function)(c & 0xff, filter->data));
! 263: CK((*filter->output_function)((c >> 8) & 0xff, filter->data));
! 264: CK((*filter->output_function)((c >> 16) & 0xff, filter->data));
! 265: CK((*filter->output_function)((c >> 24) & 0xff, filter->data));
! 266: } else {
! 267: if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
! 268: CK(mbfl_filt_conv_illegal_output(c, filter));
! 269: }
! 270: }
! 271:
! 272: return c;
! 273: }
! 274:
! 275:
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