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php5  5.3.10
mbfilter_iso8859_4.c
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00001 /*
00002  * "streamable kanji code filter and converter"
00003  * Copyright (c) 1998-2002 HappySize, Inc. All rights reserved.
00004  *
00005  * LICENSE NOTICES
00006  *
00007  * This file is part of "streamable kanji code filter and converter",
00008  * which is distributed under the terms of GNU Lesser General Public 
00009  * License (version 2) as published by the Free Software Foundation.
00010  *
00011  * This software is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  * GNU Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public
00017  * License along with "streamable kanji code filter and converter";
00018  * if not, write to the Free Software Foundation, Inc., 59 Temple Place,
00019  * Suite 330, Boston, MA  02111-1307  USA
00020  *
00021  * The author of this file:
00022  *
00023  */
00024 /*
00025  * The source code included in this files was separated from mbfilter.c
00026  * by moriyoshi koizumi <moriyoshi@php.net> on 4 dec 2002.
00027  * 
00028  */
00029 
00030 #ifdef HAVE_CONFIG_H
00031 #include "config.h"
00032 #endif
00033 
00034 #include "mbfilter.h"
00035 #include "mbfilter_iso8859_4.h"
00036 #include "unicode_table_iso8859_4.h"
00037 
00038 static const char *mbfl_encoding_8859_4_aliases[] = {"ISO_8859-4", "latin4", NULL};
00039 
00040 const mbfl_encoding mbfl_encoding_8859_4 = {
00041        mbfl_no_encoding_8859_4,
00042        "ISO-8859-4",
00043        "ISO-8859-4",
00044        (const char *(*)[])&mbfl_encoding_8859_4_aliases,
00045        NULL,
00046        MBFL_ENCTYPE_SBCS
00047 };
00048 
00049 const struct mbfl_identify_vtbl vtbl_identify_8859_4 = {
00050        mbfl_no_encoding_8859_4,
00051        mbfl_filt_ident_common_ctor,
00052        mbfl_filt_ident_common_dtor,
00053        mbfl_filt_ident_true };
00054 
00055 const struct mbfl_convert_vtbl vtbl_8859_4_wchar = {
00056        mbfl_no_encoding_8859_4,
00057        mbfl_no_encoding_wchar,
00058        mbfl_filt_conv_common_ctor,
00059        mbfl_filt_conv_common_dtor,
00060        mbfl_filt_conv_8859_4_wchar,
00061        mbfl_filt_conv_common_flush
00062 };
00063 
00064 const struct mbfl_convert_vtbl vtbl_wchar_8859_4 = {
00065        mbfl_no_encoding_wchar,
00066        mbfl_no_encoding_8859_4,
00067        mbfl_filt_conv_common_ctor,
00068        mbfl_filt_conv_common_dtor,
00069        mbfl_filt_conv_wchar_8859_4,
00070        mbfl_filt_conv_common_flush
00071 };
00072 
00073 #define CK(statement)       do { if ((statement) < 0) return (-1); } while (0)
00074 
00075 /*
00076  * ISO-8859-4 => wchar
00077  */
00078 int mbfl_filt_conv_8859_4_wchar(int c, mbfl_convert_filter *filter)
00079 {
00080        int s;
00081 
00082        if (c >= 0 && c < 0xa0) {
00083               s = c;
00084        } else if (c >= 0xa0 && c < 0x100) {
00085               s = iso8859_4_ucs_table[c - 0xa0];
00086               if (s <= 0) {
00087                      s = c;
00088                      s &= MBFL_WCSPLANE_MASK;
00089                      s |= MBFL_WCSPLANE_8859_4;
00090               }
00091        } else {
00092               s = c;
00093               s &= MBFL_WCSGROUP_MASK;
00094               s |= MBFL_WCSGROUP_THROUGH;
00095        }
00096 
00097        CK((*filter->output_function)(s, filter->data));
00098 
00099        return c;
00100 }
00101 
00102 /*
00103  * wchar => ISO-8859-4
00104  */
00105 int mbfl_filt_conv_wchar_8859_4(int c, mbfl_convert_filter *filter)
00106 {
00107        int s, n;
00108 
00109        if (c >= 0 && c < 0xa0) {
00110               s = c;
00111        } else {
00112               s = -1;
00113               n = 95;
00114               while (n >= 0) {
00115                      if (c == iso8859_4_ucs_table[n]) {
00116                             s = 0xa0 + n;
00117                             break;
00118                      }
00119                      n--;
00120               }
00121               if (s <= 0 && (c & ~MBFL_WCSPLANE_MASK) == MBFL_WCSPLANE_8859_4) {
00122                      s = c & MBFL_WCSPLANE_MASK;
00123               }
00124        }
00125 
00126        if (s >= 0) {
00127               CK((*filter->output_function)(s, filter->data));
00128        } else {
00129               if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
00130                      CK(mbfl_filt_conv_illegal_output(c, filter));
00131               }
00132        }
00133 
00134        return c;
00135 }
00136 
00137