root/ext/mbstring/libmbfl/filters/mbfilter_ascii.c

DEFINITIONS

1. mbfl_filt_conv_ascii_wchar
2. mbfl_filt_conv_wchar_ascii
3. mbfl_filt_ident_ascii

   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", "IBM-367", "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 }