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Annotation of embedaddon/php/ext/mbstring/libmbfl/filters/mbfilter_ascii.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 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. The file
                     27:  * mbfilter.c is included in this package .
                     28:  *
                     29:  */
                     30: 
                     31: #ifdef HAVE_CONFIG_H
                     32: #include "config.h"
                     33: #endif
                     34: 
                     35: #include "mbfilter.h"
                     36: #include "mbfilter_ascii.h"
                     37: 
                     38: static int mbfl_filt_ident_ascii(int c, mbfl_identify_filter *filter);
                     39: 
                     40: static const char *mbfl_encoding_ascii_aliases[] = {"ANSI_X3.4-1968", "iso-ir-6", "ANSI_X3.4-1986", "ISO_646.irv:1991", "US-ASCII", "ISO646-US", "us", "IBM367", "cp367", "csASCII", NULL};
                     41: 
                     42: const mbfl_encoding mbfl_encoding_ascii = {
                     43:        mbfl_no_encoding_ascii,
                     44:        "ASCII",
                     45:        "US-ASCII", /* preferred MIME name */
                     46:        (const char *(*)[])&mbfl_encoding_ascii_aliases,
                     47:        NULL,
                     48:        MBFL_ENCTYPE_SBCS
                     49: };
                     50: 
                     51: const struct mbfl_identify_vtbl vtbl_identify_ascii = {
                     52:        mbfl_no_encoding_ascii,
                     53:        mbfl_filt_ident_common_ctor,
                     54:        mbfl_filt_ident_common_dtor,
                     55:        mbfl_filt_ident_ascii
                     56: };
                     57: 
                     58: const struct mbfl_convert_vtbl vtbl_ascii_wchar = {
                     59:        mbfl_no_encoding_ascii,
                     60:        mbfl_no_encoding_wchar,
                     61:        mbfl_filt_conv_common_ctor,
                     62:        mbfl_filt_conv_common_dtor,
                     63:        mbfl_filt_conv_ascii_wchar,
                     64:        mbfl_filt_conv_common_flush
                     65: };
                     66: 
                     67: const struct mbfl_convert_vtbl vtbl_wchar_ascii = {
                     68:        mbfl_no_encoding_wchar,
                     69:        mbfl_no_encoding_ascii,
                     70:        mbfl_filt_conv_common_ctor,
                     71:        mbfl_filt_conv_common_dtor,
                     72:        mbfl_filt_conv_wchar_ascii,
                     73:        mbfl_filt_conv_common_flush
                     74: };
                     75: 
                     76: #define CK(statement)  do { if ((statement) < 0) return (-1); } while (0)
                     77: 
                     78: /*
                     79:  * ASCII => wchar
                     80:  */
                     81: int mbfl_filt_conv_ascii_wchar(int c, mbfl_convert_filter *filter)
                     82: {
                     83:        return (*filter->output_function)(c, filter->data);
                     84: }
                     85: 
                     86: 
                     87: /*
                     88:  * wchar => ASCII
                     89:  */
                     90: int mbfl_filt_conv_wchar_ascii(int c, mbfl_convert_filter *filter)
                     91: {
                     92:        if (c >= 0 && c < 0x80) {
                     93:                CK((*filter->output_function)(c, filter->data));
                     94:        } else {
                     95:                if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
                     96:                        CK(mbfl_filt_conv_illegal_output(c, filter));
                     97:                }
                     98:        }
                     99: 
                    100:        return c;
                    101: }
                    102: 
                    103: static int mbfl_filt_ident_ascii(int c, mbfl_identify_filter *filter)
                    104: {
                    105:        if (c >= 0x20 && c < 0x80) {
                    106:                ;
                    107:        } else if (c == 0x0d || c == 0x0a || c == 0x09 || c == 0) {     /* CR or LF or HTAB or null */
                    108:                ;
                    109:        } else {
                    110:                filter->flag = 1;
                    111:        }
                    112: 
                    113:        return c;
                    114: }