root/ext/mbstring/libmbfl/filters/mbfilter_iso8859_4.c

DEFINITIONS

1. mbfl_filt_conv_8859_4_wchar
2. mbfl_filt_conv_wchar_8859_4

   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.
  27  *
  28  */
  29 
  30 #ifdef HAVE_CONFIG_H
  31 #include "config.h"
  32 #endif
  33 
  34 #include "mbfilter.h"
  35 #include "mbfilter_iso8859_4.h"
  36 #include "unicode_table_iso8859_4.h"
  37 
  38 static const char *mbfl_encoding_8859_4_aliases[] = {"ISO_8859-4", "latin4", NULL};
  39 
  40 const mbfl_encoding mbfl_encoding_8859_4 = {
  41         mbfl_no_encoding_8859_4,
  42         "ISO-8859-4",
  43         "ISO-8859-4",
  44         (const char *(*)[])&mbfl_encoding_8859_4_aliases,
  45         NULL,
  46         MBFL_ENCTYPE_SBCS
  47 };
  48 
  49 const struct mbfl_identify_vtbl vtbl_identify_8859_4 = {
  50         mbfl_no_encoding_8859_4,
  51         mbfl_filt_ident_common_ctor,
  52         mbfl_filt_ident_common_dtor,
  53         mbfl_filt_ident_true };
  54 
  55 const struct mbfl_convert_vtbl vtbl_8859_4_wchar = {
  56         mbfl_no_encoding_8859_4,
  57         mbfl_no_encoding_wchar,
  58         mbfl_filt_conv_common_ctor,
  59         mbfl_filt_conv_common_dtor,
  60         mbfl_filt_conv_8859_4_wchar,
  61         mbfl_filt_conv_common_flush
  62 };
  63 
  64 const struct mbfl_convert_vtbl vtbl_wchar_8859_4 = {
  65         mbfl_no_encoding_wchar,
  66         mbfl_no_encoding_8859_4,
  67         mbfl_filt_conv_common_ctor,
  68         mbfl_filt_conv_common_dtor,
  69         mbfl_filt_conv_wchar_8859_4,
  70         mbfl_filt_conv_common_flush
  71 };
  72 
  73 #define CK(statement)   do { if ((statement) < 0) return (-1); } while (0)
  74 
  75 /*
  76  * ISO-8859-4 => wchar
  77  */
  78 int mbfl_filt_conv_8859_4_wchar(int c, mbfl_convert_filter *filter)
  79 {
  80         int s;
  81 
  82         if (c >= 0 && c < 0xa0) {
  83                 s = c;
  84         } else if (c >= 0xa0 && c < 0x100) {
  85                 s = iso8859_4_ucs_table[c - 0xa0];
  86                 if (s <= 0) {
  87                         s = c;
  88                         s &= MBFL_WCSPLANE_MASK;
  89                         s |= MBFL_WCSPLANE_8859_4;
  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 => ISO-8859-4
 104  */
 105 int mbfl_filt_conv_wchar_8859_4(int c, mbfl_convert_filter *filter)
 106 {
 107         int s, n;
 108 
 109         if (c >= 0 && c < 0xa0) {
 110                 s = c;
 111         } else {
 112                 s = -1;
 113                 n = 95;
 114                 while (n >= 0) {
 115                         if (c == iso8859_4_ucs_table[n]) {
 116                                 s = 0xa0 + n;
 117                                 break;
 118                         }
 119                         n--;
 120                 }
 121                 if (s <= 0 && (c & ~MBFL_WCSPLANE_MASK) == MBFL_WCSPLANE_8859_4) {
 122                         s = c & MBFL_WCSPLANE_MASK;
 123                 }
 124         }
 125 
 126         if (s >= 0) {
 127                 CK((*filter->output_function)(s, filter->data));
 128         } else {
 129                 if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
 130                         CK(mbfl_filt_conv_illegal_output(c, filter));
 131                 }
 132         }
 133 
 134         return c;
 135 }
 136 
 137