/release/src/router/php/ext/mbstring/libmbfl/filters/mbfilter_utf16.c
C | 316 lines | 242 code | 31 blank | 43 comment | 60 complexity | 863e1969ad747e0906dd9bf867c9bb06 MD5 | raw file
- /*
- * "streamable kanji code filter and converter"
- * Copyright (c) 1998-2002 HappySize, Inc. All rights reserved.
- *
- * LICENSE NOTICES
- *
- * This file is part of "streamable kanji code filter and converter",
- * which is distributed under the terms of GNU Lesser General Public
- * License (version 2) as published by the Free Software Foundation.
- *
- * This software is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with "streamable kanji code filter and converter";
- * if not, write to the Free Software Foundation, Inc., 59 Temple Place,
- * Suite 330, Boston, MA 02111-1307 USA
- *
- * The author of this file:
- *
- */
- /*
- * The source code included in this files was separated from mbfilter.c
- * by moriyoshi koizumi <moriyoshi@php.net> on 4 dec 2002.
- *
- */
- #ifdef HAVE_CONFIG_H
- #include "config.h"
- #endif
- #include "mbfilter.h"
- #include "mbfilter_utf16.h"
- static const char *mbfl_encoding_utf16_aliases[] = {"utf16", NULL};
- const mbfl_encoding mbfl_encoding_utf16 = {
- mbfl_no_encoding_utf16,
- "UTF-16",
- "UTF-16",
- (const char *(*)[])&mbfl_encoding_utf16_aliases,
- NULL,
- MBFL_ENCTYPE_MWC2BE
- };
- const mbfl_encoding mbfl_encoding_utf16be = {
- mbfl_no_encoding_utf16be,
- "UTF-16BE",
- "UTF-16BE",
- NULL,
- NULL,
- MBFL_ENCTYPE_MWC2BE
- };
- const mbfl_encoding mbfl_encoding_utf16le = {
- mbfl_no_encoding_utf16le,
- "UTF-16LE",
- "UTF-16LE",
- NULL,
- NULL,
- MBFL_ENCTYPE_MWC2LE
- };
- const struct mbfl_convert_vtbl vtbl_utf16_wchar = {
- mbfl_no_encoding_utf16,
- mbfl_no_encoding_wchar,
- mbfl_filt_conv_common_ctor,
- mbfl_filt_conv_common_dtor,
- mbfl_filt_conv_utf16_wchar,
- mbfl_filt_conv_common_flush
- };
- const struct mbfl_convert_vtbl vtbl_wchar_utf16 = {
- mbfl_no_encoding_wchar,
- mbfl_no_encoding_utf16,
- mbfl_filt_conv_common_ctor,
- mbfl_filt_conv_common_dtor,
- mbfl_filt_conv_wchar_utf16be,
- mbfl_filt_conv_common_flush
- };
- const struct mbfl_convert_vtbl vtbl_utf16be_wchar = {
- mbfl_no_encoding_utf16be,
- mbfl_no_encoding_wchar,
- mbfl_filt_conv_common_ctor,
- mbfl_filt_conv_common_dtor,
- mbfl_filt_conv_utf16be_wchar,
- mbfl_filt_conv_common_flush
- };
- const struct mbfl_convert_vtbl vtbl_wchar_utf16be = {
- mbfl_no_encoding_wchar,
- mbfl_no_encoding_utf16be,
- mbfl_filt_conv_common_ctor,
- mbfl_filt_conv_common_dtor,
- mbfl_filt_conv_wchar_utf16be,
- mbfl_filt_conv_common_flush
- };
- const struct mbfl_convert_vtbl vtbl_utf16le_wchar = {
- mbfl_no_encoding_utf16le,
- mbfl_no_encoding_wchar,
- mbfl_filt_conv_common_ctor,
- mbfl_filt_conv_common_dtor,
- mbfl_filt_conv_utf16le_wchar,
- mbfl_filt_conv_common_flush
- };
- const struct mbfl_convert_vtbl vtbl_wchar_utf16le = {
- mbfl_no_encoding_wchar,
- mbfl_no_encoding_utf16le,
- mbfl_filt_conv_common_ctor,
- mbfl_filt_conv_common_dtor,
- mbfl_filt_conv_wchar_utf16le,
- mbfl_filt_conv_common_flush
- };
- #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
- /*
- * UTF-16 => wchar
- */
- int mbfl_filt_conv_utf16_wchar(int c, mbfl_convert_filter *filter)
- {
- int n, endian;
- endian = filter->status & 0xff00;
- switch (filter->status & 0x0f) {
- case 0:
- if (endian) {
- n = c & 0xff;
- } else {
- n = (c & 0xff) << 8;
- }
- filter->cache |= n;
- filter->status++;
- break;
- default:
- if (endian) {
- n = (c & 0xff) << 8;
- } else {
- n = c & 0xff;
- }
- n |= filter->cache & 0xffff;
- filter->status &= ~0x0f;
- if (n >= 0xd800 && n < 0xdc00) {
- filter->cache = ((n & 0x3ff) << 16) + 0x400000;
- } else if (n >= 0xdc00 && n < 0xe000) {
- n &= 0x3ff;
- n |= (filter->cache & 0xfff0000) >> 6;
- filter->cache = 0;
- if (n >= MBFL_WCSPLANE_SUPMIN && n < MBFL_WCSPLANE_SUPMAX) {
- CK((*filter->output_function)(n, filter->data));
- } else { /* illegal character */
- n &= MBFL_WCSGROUP_MASK;
- n |= MBFL_WCSGROUP_THROUGH;
- CK((*filter->output_function)(n, filter->data));
- }
- } else {
- int is_first = filter->status & 0x10;
- filter->cache = 0;
- filter->status |= 0x10;
- if (!is_first) {
- if (n == 0xfffe) {
- if (endian) {
- filter->status &= ~0x100; /* big-endian */
- } else {
- filter->status |= 0x100; /* little-endian */
- }
- break;
- } else if (n == 0xfeff) {
- break;
- }
- }
- CK((*filter->output_function)(n, filter->data));
- }
- break;
- }
- return c;
- }
- /*
- * UTF-16BE => wchar
- */
- int mbfl_filt_conv_utf16be_wchar(int c, mbfl_convert_filter *filter)
- {
- int n;
- switch (filter->status) {
- case 0:
- filter->status = 1;
- n = (c & 0xff) << 8;
- filter->cache |= n;
- break;
- default:
- filter->status = 0;
- n = (filter->cache & 0xff00) | (c & 0xff);
- if (n >= 0xd800 && n < 0xdc00) {
- filter->cache = ((n & 0x3ff) << 16) + 0x400000;
- } else if (n >= 0xdc00 && n < 0xe000) {
- n &= 0x3ff;
- n |= (filter->cache & 0xfff0000) >> 6;
- filter->cache = 0;
- if (n >= MBFL_WCSPLANE_SUPMIN && n < MBFL_WCSPLANE_SUPMAX) {
- CK((*filter->output_function)(n, filter->data));
- } else { /* illegal character */
- n &= MBFL_WCSGROUP_MASK;
- n |= MBFL_WCSGROUP_THROUGH;
- CK((*filter->output_function)(n, filter->data));
- }
- } else {
- filter->cache = 0;
- CK((*filter->output_function)(n, filter->data));
- }
- break;
- }
- return c;
- }
- /*
- * wchar => UTF-16BE
- */
- int mbfl_filt_conv_wchar_utf16be(int c, mbfl_convert_filter *filter)
- {
- int n;
- if (c >= 0 && c < MBFL_WCSPLANE_UCS2MAX) {
- CK((*filter->output_function)((c >> 8) & 0xff, filter->data));
- CK((*filter->output_function)(c & 0xff, filter->data));
- } else if (c >= MBFL_WCSPLANE_SUPMIN && c < MBFL_WCSPLANE_SUPMAX) {
- n = ((c >> 10) - 0x40) | 0xd800;
- CK((*filter->output_function)((n >> 8) & 0xff, filter->data));
- CK((*filter->output_function)(n & 0xff, filter->data));
- n = (c & 0x3ff) | 0xdc00;
- CK((*filter->output_function)((n >> 8) & 0xff, filter->data));
- CK((*filter->output_function)(n & 0xff, filter->data));
- } else {
- if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
- CK(mbfl_filt_conv_illegal_output(c, filter));
- }
- }
- return c;
- }
- /*
- * UTF-16LE => wchar
- */
- int mbfl_filt_conv_utf16le_wchar(int c, mbfl_convert_filter *filter)
- {
- int n;
- switch (filter->status) {
- case 0:
- filter->status = 1;
- n = c & 0xff;
- filter->cache |= n;
- break;
- default:
- filter->status = 0;
- n = (filter->cache & 0xff) | ((c & 0xff) << 8);
- if (n >= 0xd800 && n < 0xdc00) {
- filter->cache = ((n & 0x3ff) << 16) + 0x400000;
- } else if (n >= 0xdc00 && n < 0xe000) {
- n &= 0x3ff;
- n |= (filter->cache & 0xfff0000) >> 6;
- filter->cache = 0;
- if (n >= MBFL_WCSPLANE_SUPMIN && n < MBFL_WCSPLANE_SUPMAX) {
- CK((*filter->output_function)(n, filter->data));
- } else { /* illegal character */
- n &= MBFL_WCSGROUP_MASK;
- n |= MBFL_WCSGROUP_THROUGH;
- CK((*filter->output_function)(n, filter->data));
- }
- } else {
- filter->cache = 0;
- CK((*filter->output_function)(n, filter->data));
- }
- break;
- }
- return c;
- }
- /*
- * wchar => UTF-16LE
- */
- int mbfl_filt_conv_wchar_utf16le(int c, mbfl_convert_filter *filter)
- {
- int n;
- if (c >= 0 && c < MBFL_WCSPLANE_UCS2MAX) {
- CK((*filter->output_function)(c & 0xff, filter->data));
- CK((*filter->output_function)((c >> 8) & 0xff, filter->data));
- } else if (c >= MBFL_WCSPLANE_SUPMIN && c < MBFL_WCSPLANE_SUPMAX) {
- n = ((c >> 10) - 0x40) | 0xd800;
- CK((*filter->output_function)(n & 0xff, filter->data));
- CK((*filter->output_function)((n >> 8) & 0xff, filter->data));
- n = (c & 0x3ff) | 0xdc00;
- CK((*filter->output_function)(n & 0xff, filter->data));
- CK((*filter->output_function)((n >> 8) & 0xff, filter->data));
- } else {
- if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
- CK(mbfl_filt_conv_illegal_output(c, filter));
- }
- }
- return c;
- }