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Annotation of embedaddon/php/ext/mbstring/libmbfl/filters/mbfilter_cp1254.c, revision 1.1.1.1

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 part: Haluk AKIN <halukakin@gmail.com>
                     22:  *
                     23:  */
                     24: /*
                     25:  * The source code included in this files was separated from mbfilter_ru.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_cp1254.h"
                     36: #include "unicode_table_cp1254.h"
                     37: 
                     38: static int mbfl_filt_ident_cp1254(int c, mbfl_identify_filter *filter);
                     39: 
                     40: static const char *mbfl_encoding_cp1254_aliases[] = {"CP1254", "CP-1254", "WINDOWS-1254", NULL};
                     41: 
                     42: const mbfl_encoding mbfl_encoding_cp1254 = {
                     43:        mbfl_no_encoding_cp1254,
                     44:        "Windows-1254",
                     45:        "Windows-1254",
                     46:        (const char *(*)[])&mbfl_encoding_cp1254_aliases,
                     47:        NULL,
                     48:        MBFL_ENCTYPE_SBCS
                     49: };
                     50: 
                     51: const struct mbfl_identify_vtbl vtbl_identify_cp1254 = {
                     52:        mbfl_no_encoding_cp1254,
                     53:        mbfl_filt_ident_common_ctor,
                     54:        mbfl_filt_ident_common_dtor,
                     55:        mbfl_filt_ident_cp1254
                     56: };
                     57: 
                     58: const struct mbfl_convert_vtbl vtbl_cp1254_wchar = {
                     59:        mbfl_no_encoding_cp1254,
                     60:        mbfl_no_encoding_wchar,
                     61:        mbfl_filt_conv_common_ctor,
                     62:        mbfl_filt_conv_common_dtor,
                     63:        mbfl_filt_conv_cp1254_wchar,
                     64:        mbfl_filt_conv_common_flush
                     65: };
                     66: 
                     67: const struct mbfl_convert_vtbl vtbl_wchar_cp1254 = {
                     68:        mbfl_no_encoding_wchar,
                     69:        mbfl_no_encoding_cp1254,
                     70:        mbfl_filt_conv_common_ctor,
                     71:        mbfl_filt_conv_common_dtor,
                     72:        mbfl_filt_conv_wchar_cp1254,
                     73:        mbfl_filt_conv_common_flush
                     74: };
                     75: 
                     76: #define CK(statement)  do { if ((statement) < 0) return (-1); } while (0)
                     77: 
                     78: /*
                     79:  * wchar => cp1254
                     80:  */
                     81: int
                     82: mbfl_filt_conv_wchar_cp1254(int c, mbfl_convert_filter *filter)
                     83: {
                     84:        int s, n;
                     85: 
                     86:        if (c < 0x80) {
                     87:                s = c;
                     88:        } else {
                     89:                s = -1;
                     90:                n = cp1254_ucs_table_len-1;
                     91:                while (n >= 0) {
                     92:                        if (c == cp1254_ucs_table[n] && c != 0xfffe) {
                     93:                                s = cp1254_ucs_table_min + n;
                     94:                                break;
                     95:                        }
                     96:                        n--;
                     97:                }
                     98:                if (s <= 0 && (c & ~MBFL_WCSPLANE_MASK) == MBFL_WCSPLANE_CP1254) {
                     99:                        s = c & MBFL_WCSPLANE_MASK;
                    100:                }
                    101:        }
                    102: 
                    103:        if (s >= 0) {
                    104:                CK((*filter->output_function)(s, filter->data));
                    105:        } else {
                    106:                if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
                    107:                        CK(mbfl_filt_conv_illegal_output(c, filter));
                    108:                }
                    109:        }
                    110: 
                    111:        return c;
                    112: }
                    113: 
                    114: /*
                    115:  * cp1254 => wchar
                    116:  */
                    117: int
                    118: mbfl_filt_conv_cp1254_wchar(int c, mbfl_convert_filter *filter)
                    119: {
                    120:        int s;
                    121: 
                    122:        if (c >= 0 && c < cp1254_ucs_table_min) {
                    123:                s = c;
                    124:        } else if (c >= cp1254_ucs_table_min && c < 0x100) {
                    125:                s = cp1254_ucs_table[c - cp1254_ucs_table_min];
                    126:                if (s <= 0) {
                    127:                        s = c;
                    128:                        s &= MBFL_WCSPLANE_MASK;
                    129:                        s |= MBFL_WCSPLANE_CP1254;
                    130:                }
                    131:        } else {
                    132:                s = c;
                    133:                s &= MBFL_WCSGROUP_MASK;
                    134:                s |= MBFL_WCSGROUP_THROUGH;
                    135:        }
                    136: 
                    137:        CK((*filter->output_function)(s, filter->data));
                    138: 
                    139:        return c;
                    140: }
                    141: 
                    142: /* We only distinguish the MS extensions to ISO-8859-1.
                    143:  * Actually, this is pretty much a NO-OP, since the identification
                    144:  * system doesn't allow us to discriminate between a positive match,
                    145:  * a possible match and a definite non-match.
                    146:  * The problem here is that cp1254 looks like SJIS for certain chars.
                    147:  * */
                    148: static int mbfl_filt_ident_cp1254(int c, mbfl_identify_filter *filter)
                    149: {
                    150:        if (c >= 0x80 && c < 0xff)
                    151:                filter->flag = 0;
                    152:        else
                    153:                filter->flag = 1; /* not it */
                    154:        return c;       
                    155: }
                    156: 
                    157: