1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
##---------------------------------------------------------------------------##
## File:
## $Id: Char.pm,v 1.4 2010/12/31 20:34:00 ehood Exp $
## Author:
## Earl Hood earl@earlhood.com
## Description:
## POD after __END__
##---------------------------------------------------------------------------##
## Copyright (C) 1997-2002 Earl Hood, earl@earlhood.com
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2 of the License, or
## (at your option) any later version.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program; if not, write to the Free Software
## Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
## 02111-1307, USA
##---------------------------------------------------------------------------##
package MHonArc::Char;
our $VERSION = '2.6.24';
###############################################################################
## Routines
###############################################################################
##---------------------------------------------------------------------------##
## map_conv converts a string encoded by $charset to a string
## defined by a given mapping table.
##
sub map_conv {
my $data_r = shift; # Reference to text
my $charset = shift; # encoding (should be in lowercase
my $char_maps = shift; # MHonArc::CharMaps instance
my @maps = shift || (); # Additional maps to use
# Pre-processing checks
if ($charset eq 'iso-2022-jp') {
# iso-2022-jp, convert to euc-jp first
require MHonArc::Char::JP;
MHonArc::Char::JP::jp_2022_to_euc($data_r);
$charset = 'euc-jp';
} elsif ($charset eq 'iso-2022-kr') {
# if iso-2022-kr, convert to euc-kr first
require MHonArc::Char::KR;
MHonArc::Char::KR::kr_2022_to_euc($data_r);
$charset = 'cp949';
}
# Get mapping
unshift(@maps, $char_maps->get_map($charset));
# Convert text
if ($charset eq 'euc-jp') {
# Japanese
_euc_jp_conv($data_r, \@maps);
return $$data_r;
}
if ($charset eq 'cp932') {
# Japanese ShiftJIS
_shiftjis_conv($data_r, \@maps);
return $$data_r;
}
if ($charset eq 'cp949') {
# Korean
_euc_kr_conv($data_r, \@maps);
return $$data_r;
}
if ( $charset eq 'cp950'
|| $charset eq 'cp936'
|| $charset eq 'gb2312'
|| $charset eq 'big5-eten'
|| $charset eq 'big5-hkscs') {
# Chinese
_chinese_conv($data_r, \@maps);
return $$data_r;
}
# Single byte charset
# Bug #14747: Performance and memory improvement for single byte
# charsets. A regex is dynamically built, specific
# to the map(s) provided, so replacement is done
# directly by regex engine.
# Patch provided by Andrew Shirrayev.
my ($map, $char, $code, %summap, $summap);
for ($code = 0x00; $code <= 0xFF; $code++) {
foreach $map (@maps) {
$char = $map->{chr($code)};
last if defined($char);
}
unless (defined($char)) {
next if ($code <= 0x7F);
$char = '?';
}
$summap{chr($code)} = $char;
$summap .= chr($code);
}
# DO NOT use /o here since we need to recompile each time.
$$data_r =~ s/([$summap])/$summap{$1}/ge;
$$data_r;
}
sub _euc_jp_conv {
my $data_r = shift;
my $maps = shift;
my ($map, $char);
$$data_r =~ s{
([\x00-\x7E]|
[\x8E][\xA1-\xDF]|
[\xA1-\xFE][\xA1-\xFE]|
\x8F[\xA2-\xFE][\xA1-\xFE])
}{
foreach $map (@$maps) {
$char = $map->{$1};
last if defined($char);
}
$char = (length($1) > 1 ? '?' : $1) unless defined($char);
$char;
}gxe;
}
sub _shiftjis_conv {
my $data_r = shift;
my $maps = shift;
my ($map, $char);
$$data_r =~ s{
([\x00-\x7E]|
[\xA1-\xDF]|
[\x81-\x9F\xE0-\xEF][\x40-\x7E\x80-\xFC])
}{
foreach $map (@$maps) {
$char = $map->{$1};
last if defined($char);
}
$char = (length($1) > 1 ? '?' : $1) unless defined($char);
$char;
}gxe;
}
sub _euc_kr_conv {
my $data_r = shift;
my $maps = shift;
my ($map, $char);
$$data_r =~ s{
([\x00-\x80]|
[\x81-\xFE][\xA1-\xFE])
}{
foreach $map (@$maps) {
$char = $map->{$1};
last if defined($char);
}
$char = (length($1) > 1 ? '?' : $1) unless defined($char);
$char;
}gxe;
}
sub _chinese_conv {
my $data_r = shift;
my $maps = shift;
my ($map, $char);
$$data_r =~ s{
([\x00-\x80]|
[\x81-\xFF][\x00-\xFF])
}{
foreach $map (@$maps) {
$char = $map->{$1};
last if defined($char);
}
$char = (length($1) > 1 ? '?' : $1) unless defined($char);
$char;
}gxe;
}
##---------------------------------------------------------------------------##
1;
__END__
=head1 NAME
MHonArc::Char - Character related utilties for MHonArc.
=head1 SYNOPSIS
use MHonArc::Char;
=head1 DESCRIPTION
MHonArc::Char provides character related utilities.
=head1 VERSION
$Id: Char.pm,v 1.4 2010/12/31 20:34:00 ehood Exp $
=head1 AUTHOR
Earl Hood, earl@earlhood.com
MHonArc comes with ABSOLUTELY NO WARRANTY and MHonArc may be copied only
under the terms of the GNU General Public License, which may be found in
the MHonArc distribution.
=cut
|
