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Annotation of embedaddon/php/ext/mbstring/libmbfl/filters/mbfilter_cp850.c, revision 1.1.1.2

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: Den V. Tsopa <tdv@edisoft.ru>
                     22:  * Adaption for CP850: D. Giffeler <dg@artegic.de>
                     23:  *
                     24:  */
                     25: 
                     26: #ifdef HAVE_CONFIG_H
                     27: #include "config.h"
                     28: #endif
                     29: 
                     30: #include "mbfilter.h"
                     31: #include "mbfilter_cp850.h"
                     32: #include "unicode_table_cp850.h"
                     33: 
                     34: static int mbfl_filt_ident_cp850(int c, mbfl_identify_filter *filter);
                     35: 
1.1.1.2 ! misho      36: static const char *mbfl_encoding_cp850_aliases[] = {"CP850", "CP-850", "IBM850", "IBM-850", NULL};
1.1       misho      37: 
                     38: const mbfl_encoding mbfl_encoding_cp850 = {
                     39:        mbfl_no_encoding_cp850,
                     40:        "CP850",
                     41:        "CP850",
                     42:        (const char *(*)[])&mbfl_encoding_cp850_aliases,
                     43:        NULL,
                     44:        MBFL_ENCTYPE_SBCS
                     45: };
                     46: 
                     47: const struct mbfl_identify_vtbl vtbl_identify_cp850 = {
                     48:        mbfl_no_encoding_cp850,
                     49:        mbfl_filt_ident_common_ctor,
                     50:        mbfl_filt_ident_common_dtor,
                     51:        mbfl_filt_ident_cp850
                     52: };
                     53: 
                     54: const struct mbfl_convert_vtbl vtbl_wchar_cp850 = {
                     55:        mbfl_no_encoding_wchar,
                     56:        mbfl_no_encoding_cp850,
                     57:        mbfl_filt_conv_common_ctor,
                     58:        mbfl_filt_conv_common_dtor,
                     59:        mbfl_filt_conv_wchar_cp850,
                     60:        mbfl_filt_conv_common_flush
                     61: };
                     62: 
                     63: const struct mbfl_convert_vtbl vtbl_cp850_wchar = {
                     64:        mbfl_no_encoding_cp850,
                     65:        mbfl_no_encoding_wchar,
                     66:        mbfl_filt_conv_common_ctor,
                     67:        mbfl_filt_conv_common_dtor,
                     68:        mbfl_filt_conv_cp850_wchar,
                     69:        mbfl_filt_conv_common_flush
                     70: };
                     71: 
                     72: #define CK(statement)  do { if ((statement) < 0) return (-1); } while (0)
                     73: 
                     74: /*
                     75:  * cp850 => wchar
                     76:  */
                     77: int
                     78: mbfl_filt_conv_cp850_wchar(int c, mbfl_convert_filter *filter)
                     79: {
                     80:        int s;
                     81: 
                     82:        if (c >= 0 && c < cp850_ucs_table_min) {
                     83:                s = c;
                     84:        } else if (c >= cp850_ucs_table_min && c < 0x100) {
                     85:                s = cp850_ucs_table[c - cp850_ucs_table_min];
                     86:                if (s <= 0) {
                     87:                        s = c;
                     88:                        s &= MBFL_WCSPLANE_MASK;
                     89:                        s |= MBFL_WCSPLANE_CP850;
                     90:                }
                     91:        } else {
                     92:                s = c;
                     93:                s &= MBFL_WCSGROUP_MASK;
                     94:                s |= MBFL_WCSGROUP_THROUGH;
                     95:        }
                     96: 
                     97:        CK((*filter->output_function)(s, filter->data));
                     98: 
                     99:        return c;
                    100: }
                    101: 
                    102: /*
                    103:  * wchar => cp850
                    104:  */
                    105: int
                    106: mbfl_filt_conv_wchar_cp850(int c, mbfl_convert_filter *filter)
                    107: {
                    108:        int s, n;
                    109: 
                    110:        if (c < 0x80) {
                    111:                s = c;
                    112:        } else {
                    113:                s = -1;
                    114:                n = cp850_ucs_table_len-1;
                    115:                while (n >= 0) {
                    116:                        if (c == cp850_ucs_table[n]) {
                    117:                                s = cp850_ucs_table_min + n;
                    118:                                break;
                    119:                        }
                    120:                        n--;
                    121:                }
                    122:                if (s <= 0 && (c & ~MBFL_WCSPLANE_MASK) == MBFL_WCSPLANE_CP850) {
                    123:                        s = c & MBFL_WCSPLANE_MASK;
                    124:                }
                    125:        }
                    126: 
                    127:        if (s >= 0) {
                    128:                CK((*filter->output_function)(s, filter->data));
                    129:        } else {
                    130:                if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
                    131:                        CK(mbfl_filt_conv_illegal_output(c, filter));
                    132:                }
                    133:        }
                    134: 
                    135:        return c;
                    136: }
                    137: 
                    138: static int mbfl_filt_ident_cp850(int c, mbfl_identify_filter *filter)
                    139: {
                    140:        if (c >= 0x80 && c < 0xff)
                    141:                filter->flag = 0;
                    142:        else
                    143:                filter->flag = 1; /* not it */
                    144:        return c;       
                    145: }
                    146: 
                    147: