Annotation of embedaddon/php/ext/mbstring/libmbfl/filters/mbfilter_ucs2.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_ucs2.h"
! 36:
! 37: static const char *mbfl_encoding_ucs2_aliases[] = {"ISO-10646-UCS-2", "UCS2" , "UNICODE", NULL};
! 38:
! 39: const mbfl_encoding mbfl_encoding_ucs2 = {
! 40: mbfl_no_encoding_ucs2,
! 41: "UCS-2",
! 42: "UCS-2",
! 43: (const char *(*)[])&mbfl_encoding_ucs2_aliases,
! 44: NULL,
! 45: MBFL_ENCTYPE_WCS2BE
! 46: };
! 47:
! 48: const mbfl_encoding mbfl_encoding_ucs2be = {
! 49: mbfl_no_encoding_ucs2be,
! 50: "UCS-2BE",
! 51: "UCS-2BE",
! 52: NULL,
! 53: NULL,
! 54: MBFL_ENCTYPE_WCS2BE
! 55: };
! 56:
! 57: const mbfl_encoding mbfl_encoding_ucs2le = {
! 58: mbfl_no_encoding_ucs2le,
! 59: "UCS-2LE",
! 60: "UCS-2LE",
! 61: NULL,
! 62: NULL,
! 63: MBFL_ENCTYPE_WCS2LE
! 64: };
! 65:
! 66: const struct mbfl_convert_vtbl vtbl_ucs2_wchar = {
! 67: mbfl_no_encoding_ucs2,
! 68: mbfl_no_encoding_wchar,
! 69: mbfl_filt_conv_common_ctor,
! 70: mbfl_filt_conv_common_dtor,
! 71: mbfl_filt_conv_ucs2_wchar,
! 72: mbfl_filt_conv_common_flush
! 73: };
! 74:
! 75: const struct mbfl_convert_vtbl vtbl_wchar_ucs2 = {
! 76: mbfl_no_encoding_wchar,
! 77: mbfl_no_encoding_ucs2,
! 78: mbfl_filt_conv_common_ctor,
! 79: mbfl_filt_conv_common_dtor,
! 80: mbfl_filt_conv_wchar_ucs2be,
! 81: mbfl_filt_conv_common_flush
! 82: };
! 83:
! 84: const struct mbfl_convert_vtbl vtbl_ucs2be_wchar = {
! 85: mbfl_no_encoding_ucs2be,
! 86: mbfl_no_encoding_wchar,
! 87: mbfl_filt_conv_common_ctor,
! 88: mbfl_filt_conv_common_dtor,
! 89: mbfl_filt_conv_ucs2be_wchar,
! 90: mbfl_filt_conv_common_flush
! 91: };
! 92:
! 93: const struct mbfl_convert_vtbl vtbl_wchar_ucs2be = {
! 94: mbfl_no_encoding_wchar,
! 95: mbfl_no_encoding_ucs2be,
! 96: mbfl_filt_conv_common_ctor,
! 97: mbfl_filt_conv_common_dtor,
! 98: mbfl_filt_conv_wchar_ucs2be,
! 99: mbfl_filt_conv_common_flush
! 100: };
! 101:
! 102: const struct mbfl_convert_vtbl vtbl_ucs2le_wchar = {
! 103: mbfl_no_encoding_ucs2le,
! 104: mbfl_no_encoding_wchar,
! 105: mbfl_filt_conv_common_ctor,
! 106: mbfl_filt_conv_common_dtor,
! 107: mbfl_filt_conv_ucs2le_wchar,
! 108: mbfl_filt_conv_common_flush
! 109: };
! 110:
! 111: const struct mbfl_convert_vtbl vtbl_wchar_ucs2le = {
! 112: mbfl_no_encoding_wchar,
! 113: mbfl_no_encoding_ucs2le,
! 114: mbfl_filt_conv_common_ctor,
! 115: mbfl_filt_conv_common_dtor,
! 116: mbfl_filt_conv_wchar_ucs2le,
! 117: mbfl_filt_conv_common_flush
! 118: };
! 119:
! 120: #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
! 121:
! 122: /*
! 123: * UCS-2 => wchar
! 124: */
! 125: int mbfl_filt_conv_ucs2_wchar(int c, mbfl_convert_filter *filter)
! 126: {
! 127: int n, endian;
! 128:
! 129: endian = filter->status & 0xff00;
! 130: switch (filter->status & 0xff) {
! 131: case 0:
! 132: if (endian) {
! 133: n = c & 0xff;
! 134: } else {
! 135: n = (c & 0xff) << 8;
! 136: }
! 137: filter->cache = n;
! 138: filter->status++;
! 139: break;
! 140: default:
! 141: if (endian) {
! 142: n = (c & 0xff) << 8;
! 143: } else {
! 144: n = c & 0xff;
! 145: }
! 146: n |= filter->cache;
! 147: if (n == 0xfffe) {
! 148: if (endian) {
! 149: filter->status = 0; /* big-endian */
! 150: } else {
! 151: filter->status = 0x100; /* little-endian */
! 152: }
! 153: CK((*filter->output_function)(0xfeff, filter->data));
! 154: } else {
! 155: filter->status &= ~0xff;
! 156: CK((*filter->output_function)(n, filter->data));
! 157: }
! 158: break;
! 159: }
! 160:
! 161: return c;
! 162: }
! 163:
! 164: /*
! 165: * UCS-2BE => wchar
! 166: */
! 167: int mbfl_filt_conv_ucs2be_wchar(int c, mbfl_convert_filter *filter)
! 168: {
! 169: int n;
! 170:
! 171: if (filter->status == 0) {
! 172: filter->status = 1;
! 173: n = (c & 0xff) << 8;
! 174: filter->cache = n;
! 175: } else {
! 176: filter->status = 0;
! 177: n = (c & 0xff) | filter->cache;
! 178: CK((*filter->output_function)(n, filter->data));
! 179: }
! 180: return c;
! 181: }
! 182:
! 183: /*
! 184: * wchar => UCS-2BE
! 185: */
! 186: int mbfl_filt_conv_wchar_ucs2be(int c, mbfl_convert_filter *filter)
! 187: {
! 188: if (c >= 0 && c < MBFL_WCSPLANE_UCS2MAX) {
! 189: CK((*filter->output_function)((c >> 8) & 0xff, filter->data));
! 190: CK((*filter->output_function)(c & 0xff, filter->data));
! 191: } else {
! 192: if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
! 193: CK(mbfl_filt_conv_illegal_output(c, filter));
! 194: }
! 195: }
! 196:
! 197: return c;
! 198: }
! 199:
! 200: /*
! 201: * UCS-2LE => wchar
! 202: */
! 203: int mbfl_filt_conv_ucs2le_wchar(int c, mbfl_convert_filter *filter)
! 204: {
! 205: int n;
! 206:
! 207: if (filter->status == 0) {
! 208: filter->status = 1;
! 209: n = c & 0xff;
! 210: filter->cache = n;
! 211: } else {
! 212: filter->status = 0;
! 213: n = ((c & 0xff) << 8) | filter->cache;
! 214: CK((*filter->output_function)(n, filter->data));
! 215: }
! 216: return c;
! 217: }
! 218:
! 219:
! 220: /*
! 221: * wchar => UCS-2LE
! 222: */
! 223: int mbfl_filt_conv_wchar_ucs2le(int c, mbfl_convert_filter *filter)
! 224: {
! 225: if (c >= 0 && c < MBFL_WCSPLANE_UCS2MAX) {
! 226: CK((*filter->output_function)(c & 0xff, filter->data));
! 227: CK((*filter->output_function)((c >> 8) & 0xff, filter->data));
! 228: } else {
! 229: if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
! 230: CK(mbfl_filt_conv_illegal_output(c, filter));
! 231: }
! 232: }
! 233:
! 234: return c;
! 235: }
! 236:
! 237:
! 238:
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