root/ext/mbstring/libmbfl/filters/mbfilter_byte2.c

DEFINITIONS

1. mbfl_filt_conv_byte2be_wchar
2. mbfl_filt_conv_wchar_byte2be
3. mbfl_filt_conv_byte2le_wchar
4. mbfl_filt_conv_wchar_byte2le

   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_byte2.h"
  37 
  38 const mbfl_encoding mbfl_encoding_byte2be = {
  39         mbfl_no_encoding_byte2be,
  40         "byte2be",
  41         NULL,
  42         NULL,
  43         NULL,
  44         MBFL_ENCTYPE_SBCS
  45 };
  46 
  47 const mbfl_encoding mbfl_encoding_byte2le = {
  48         mbfl_no_encoding_byte2le,
  49         "byte2le",
  50         NULL,
  51         NULL,
  52         NULL,
  53         MBFL_ENCTYPE_SBCS
  54 };
  55 
  56 const struct mbfl_convert_vtbl vtbl_byte2be_wchar = {
  57         mbfl_no_encoding_byte2be,
  58         mbfl_no_encoding_wchar,
  59         mbfl_filt_conv_common_ctor,
  60         mbfl_filt_conv_common_dtor,
  61         mbfl_filt_conv_byte2be_wchar,
  62         mbfl_filt_conv_common_flush
  63 };
  64 
  65 const struct mbfl_convert_vtbl vtbl_wchar_byte2be = {
  66         mbfl_no_encoding_wchar,
  67         mbfl_no_encoding_byte2be,
  68         mbfl_filt_conv_common_ctor,
  69         mbfl_filt_conv_common_dtor,
  70         mbfl_filt_conv_wchar_byte2be,
  71         mbfl_filt_conv_common_flush };
  72 
  73 const struct mbfl_convert_vtbl vtbl_byte2le_wchar = {
  74         mbfl_no_encoding_byte2le,
  75         mbfl_no_encoding_wchar,
  76         mbfl_filt_conv_common_ctor,
  77         mbfl_filt_conv_common_dtor,
  78         mbfl_filt_conv_byte2le_wchar,
  79         mbfl_filt_conv_common_flush };
  80 
  81 const struct mbfl_convert_vtbl vtbl_wchar_byte2le = {
  82         mbfl_no_encoding_wchar,
  83         mbfl_no_encoding_byte2le,
  84         mbfl_filt_conv_common_ctor,
  85         mbfl_filt_conv_common_dtor,
  86         mbfl_filt_conv_wchar_byte2le,
  87         mbfl_filt_conv_common_flush };
  88 
  89 #define CK(statement)   do { if ((statement) < 0) return (-1); } while (0)
  90 
  91 int mbfl_filt_conv_byte2be_wchar(int c, mbfl_convert_filter *filter)
  92 {
  93         int n;
  94 
  95         if (filter->status == 0) {
  96                 filter->status = 1;
  97                 n = (c & 0xff) << 8;
  98                 filter->cache = n;
  99         } else {
 100                 filter->status = 0;
 101                 n = (c & 0xff) | filter->cache;
 102                 CK((*filter->output_function)(n, filter->data));
 103         }
 104         return c;
 105 }
 106 
 107 int mbfl_filt_conv_wchar_byte2be(int c, mbfl_convert_filter *filter)
 108 {
 109         CK((*filter->output_function)((c >> 8) & 0xff, filter->data));
 110         CK((*filter->output_function)(c & 0xff, filter->data));
 111         return c;
 112 }
 113 
 114 int mbfl_filt_conv_byte2le_wchar(int c, mbfl_convert_filter *filter)
 115 {
 116         int n;
 117 
 118         if (filter->status == 0) {
 119                 filter->status = 1;
 120                 n = c & 0xff;
 121                 filter->cache = n;
 122         } else {
 123                 filter->status = 0;
 124                 n = ((c & 0xff) << 8) | filter->cache;
 125                 CK((*filter->output_function)(n, filter->data));
 126         }
 127         return c;
 128 }
 129 
 130 int mbfl_filt_conv_wchar_byte2le(int c, mbfl_convert_filter *filter)
 131 {
 132         CK((*filter->output_function)(c & 0xff, filter->data));
 133         CK((*filter->output_function)((c >> 8) & 0xff, filter->data));
 134         return c;
 135 }
 136 
 137