root/ext/mbstring/libmbfl/filters/mbfilter_armscii8.c

DEFINITIONS

1. mbfl_filt_conv_armscii8_wchar
2. mbfl_filt_conv_wchar_armscii8
3. mbfl_filt_ident_armscii8

   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: Hayk Chamyan <hamshen@gmail.com>
  22  *
  23  */
  24 
  25 /*
  26  * "armenian code filter and converter"
  27  */
  28 
  29 #ifdef HAVE_CONFIG_H
  30 #include "config.h"
  31 #endif
  32 
  33 #include "mbfilter.h"
  34 #include "mbfilter_armscii8.h"
  35 #include "unicode_table_armscii8.h"
  36 
  37 static int mbfl_filt_ident_armscii8(int c, mbfl_identify_filter *filter);
  38 
  39 static const char *mbfl_encoding_armscii8_aliases[] = {"ArmSCII-8", "ArmSCII8", "ARMSCII-8", "ARMSCII8", NULL};
  40 
  41 const mbfl_encoding mbfl_encoding_armscii8 = {
  42         mbfl_no_encoding_armscii8,
  43         "ArmSCII-8",
  44         "ArmSCII-8",
  45         (const char *(*)[])&mbfl_encoding_armscii8_aliases,
  46         NULL,
  47         MBFL_ENCTYPE_SBCS
  48 };
  49 
  50 const struct mbfl_identify_vtbl vtbl_identify_armscii8 = {
  51         mbfl_no_encoding_armscii8,
  52         mbfl_filt_ident_common_ctor,
  53         mbfl_filt_ident_common_dtor,
  54         mbfl_filt_ident_armscii8
  55 };
  56 
  57 const struct mbfl_convert_vtbl vtbl_wchar_armscii8 = {
  58         mbfl_no_encoding_wchar,
  59         mbfl_no_encoding_armscii8,
  60         mbfl_filt_conv_common_ctor,
  61         mbfl_filt_conv_common_dtor,
  62         mbfl_filt_conv_wchar_armscii8,
  63         mbfl_filt_conv_common_flush
  64 };
  65 
  66 const struct mbfl_convert_vtbl vtbl_armscii8_wchar = {
  67         mbfl_no_encoding_armscii8,
  68         mbfl_no_encoding_wchar,
  69         mbfl_filt_conv_common_ctor,
  70         mbfl_filt_conv_common_dtor,
  71         mbfl_filt_conv_armscii8_wchar,
  72         mbfl_filt_conv_common_flush
  73 };
  74 
  75 #define CK(statement)   do { if ((statement) < 0) return (-1); } while (0)
  76 
  77 /*
  78  * armscii8 => wchar
  79  */
  80 int mbfl_filt_conv_armscii8_wchar(int c, mbfl_convert_filter *filter)
  81 {
  82         int s;
  83 
  84         if (c >= 0 && c < armscii8_ucs_table_min) {
  85                 s = c;
  86         } else if (c >= armscii8_ucs_table_min && c < 0x100) {
  87                 s = armscii8_ucs_table[c - armscii8_ucs_table_min];
  88                 if (s <= 0) {
  89                         s = c;
  90                         s &= MBFL_WCSPLANE_MASK;
  91                         s |= MBFL_WCSPLANE_ARMSCII8;
  92                 }
  93         } else {
  94                 s = c;
  95                 s &= MBFL_WCSGROUP_MASK;
  96                 s |= MBFL_WCSGROUP_THROUGH;
  97         }
  98 
  99         CK((*filter->output_function)(s, filter->data));
 100 
 101         return c;
 102 }
 103 
 104 /*
 105  * wchar => armscii8
 106  */
 107 int mbfl_filt_conv_wchar_armscii8(int c, mbfl_convert_filter *filter)
 108 {
 109 
 110         int s, n;
 111 
 112         if (c >= 0x28 && c < 0x30) {
 113                 s = ucs_armscii8_table[c-0x28];
 114         } else if (c < armscii8_ucs_table_min) {
 115                 s = c;
 116         } else {
 117                 s = -1;
 118                 n = armscii8_ucs_table_len-1;
 119                 while (n >= 0) {
 120                         if (c == armscii8_ucs_table[n]) {
 121                                 s = armscii8_ucs_table_min + n;
 122                                 break;
 123                         }
 124                         n--;
 125                 }
 126                 if (s <= 0 && (c & ~MBFL_WCSPLANE_MASK) == MBFL_WCSPLANE_ARMSCII8) {
 127                         s = c & MBFL_WCSPLANE_MASK;
 128                 }
 129         }
 130 
 131         if (s >= 0) {
 132                 CK((*filter->output_function)(s, filter->data));
 133         } else {
 134                 if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
 135                         CK(mbfl_filt_conv_illegal_output(c, filter));
 136                 }
 137         }
 138 
 139         return c;
 140 }
 141 
 142 static int mbfl_filt_ident_armscii8(int c, mbfl_identify_filter *filter)
 143 {
 144         if (c >= armscii8_ucs_table_min && c <= 0xff)
 145                 filter->flag = 0;
 146         else
 147                 filter->flag = 1; /* not it */
 148         return c;
 149 }