line |
stmt |
bran |
cond |
sub |
pod |
time |
code |
1
|
|
|
|
|
|
|
package IsUTF8; |
2
|
|
|
|
|
|
|
|
3
|
|
|
|
|
|
|
# $Id: IsUTF8.pm 2011 2006-06-21 08:23:10Z heiko $ |
4
|
|
|
|
|
|
|
# $URL: https://svn.schlittermann.de/pub/perl-unicode-detect/trunk/lib/IsUTF8.pm $ |
5
|
|
|
|
|
|
|
# © 2006 |
6
|
|
|
|
|
|
|
# |
7
|
|
|
|
|
|
|
|
8
|
|
|
|
|
|
|
=head1 NAME |
9
|
|
|
|
|
|
|
|
10
|
|
|
|
|
|
|
IsUTF8 - detects if UTF8 characters are present |
11
|
|
|
|
|
|
|
|
12
|
|
|
|
|
|
|
=cut |
13
|
|
|
|
|
|
|
|
14
|
1
|
|
|
1
|
|
28448
|
use strict; |
|
1
|
|
|
|
|
3
|
|
|
1
|
|
|
|
|
43
|
|
15
|
1
|
|
|
1
|
|
6
|
use warnings; |
|
1
|
|
|
|
|
1
|
|
|
1
|
|
|
|
|
45
|
|
16
|
|
|
|
|
|
|
|
17
|
|
|
|
|
|
|
our $VERSION = '0.2'; |
18
|
|
|
|
|
|
|
|
19
|
1
|
|
|
1
|
|
6
|
use Exporter; |
|
1
|
|
|
|
|
6
|
|
|
1
|
|
|
|
|
646
|
|
20
|
|
|
|
|
|
|
our @ISA = qw/Exporter/; |
21
|
|
|
|
|
|
|
our @EXPORT_OK = qw/&isUTF8/; |
22
|
|
|
|
|
|
|
|
23
|
|
|
|
|
|
|
=head1 SYNOPSIS |
24
|
|
|
|
|
|
|
|
25
|
|
|
|
|
|
|
use IsUTF8; |
26
|
|
|
|
|
|
|
$result = IsUTF8::isUTF8; |
27
|
|
|
|
|
|
|
$result = IsUTF8::isUTF8($line); |
28
|
|
|
|
|
|
|
|
29
|
|
|
|
|
|
|
use IsUTF8 qw(isUTF8); |
30
|
|
|
|
|
|
|
$result = isUTF8; |
31
|
|
|
|
|
|
|
$result = isUTF8($line); |
32
|
|
|
|
|
|
|
|
33
|
|
|
|
|
|
|
use IsUTF8 qw(isUTF8 debug); |
34
|
|
|
|
|
|
|
$result = isUTF8; |
35
|
|
|
|
|
|
|
$result = isUTF8($line); |
36
|
|
|
|
|
|
|
|
37
|
|
|
|
|
|
|
if (not defined $result) { |
38
|
|
|
|
|
|
|
print "Contains some characters with 8th bit set!"; |
39
|
|
|
|
|
|
|
} |
40
|
|
|
|
|
|
|
if ($result == 0) { |
41
|
|
|
|
|
|
|
print "Plain ASCII (0..127)"; |
42
|
|
|
|
|
|
|
} |
43
|
|
|
|
|
|
|
if ($result) { |
44
|
|
|
|
|
|
|
print "Contains UTF8"; |
45
|
|
|
|
|
|
|
} |
46
|
|
|
|
|
|
|
|
47
|
|
|
|
|
|
|
=cut |
48
|
|
|
|
|
|
|
|
49
|
|
|
|
|
|
|
my $debug = 0; |
50
|
|
|
|
|
|
|
|
51
|
|
|
|
|
|
|
sub import(@) { |
52
|
1
|
|
|
1
|
|
18
|
$debug = grep /^debug$/, @_; |
53
|
1
|
|
|
|
|
7
|
@_ = grep !/^debug$/, @_; |
54
|
1
|
|
|
|
|
170
|
goto &Exporter::import; |
55
|
|
|
|
|
|
|
} |
56
|
|
|
|
|
|
|
|
57
|
|
|
|
|
|
|
sub isUTF8(;$) { |
58
|
8
|
100
|
|
8
|
0
|
15518
|
my $data = @_ ? $_[0] : $_; |
59
|
|
|
|
|
|
|
|
60
|
8
|
50
|
|
|
|
26
|
$data =~ s/\s*$// if $debug; |
61
|
8
|
50
|
|
|
|
18
|
print STDERR "test: $data\n" if $debug > 2; |
62
|
|
|
|
|
|
|
|
63
|
8
|
100
|
|
|
|
85
|
if ($data =~ /( |
64
|
|
|
|
|
|
|
[\xc0-\xdf][\x80-\xbf] |
65
|
|
|
|
|
|
|
| [\xe0-\xef][\x80-\xbf]{2} |
66
|
|
|
|
|
|
|
| [\xf0-\xf7][\x80-\xbf]{3} ) /x |
67
|
|
|
|
|
|
|
) { |
68
|
4
|
50
|
|
|
|
10
|
if ($debug) { |
69
|
0
|
|
|
|
|
0
|
print STDERR "$data\n" |
70
|
|
|
|
|
|
|
. " " x index($data, $1) |
71
|
|
|
|
|
|
|
. "^\n"; |
72
|
|
|
|
|
|
|
} |
73
|
|
|
|
|
|
|
|
74
|
4
|
|
|
|
|
12
|
return 1; |
75
|
|
|
|
|
|
|
|
76
|
|
|
|
|
|
|
} |
77
|
|
|
|
|
|
|
|
78
|
4
|
100
|
|
|
|
17
|
if ($data =~ /([\x80-\xff])/) { |
79
|
2
|
50
|
|
|
|
8
|
if ($debug) { |
80
|
0
|
|
|
|
|
0
|
print STDERR "$data\n", |
81
|
|
|
|
|
|
|
. " " x index($data, $1) |
82
|
|
|
|
|
|
|
. "^\n"; |
83
|
|
|
|
|
|
|
} |
84
|
|
|
|
|
|
|
|
85
|
2
|
|
|
|
|
8
|
return undef; |
86
|
|
|
|
|
|
|
} |
87
|
|
|
|
|
|
|
|
88
|
2
|
|
|
|
|
5
|
return 0; |
89
|
|
|
|
|
|
|
} |
90
|
|
|
|
|
|
|
|
91
|
|
|
|
|
|
|
=head1 DESCRIPTION |
92
|
|
|
|
|
|
|
|
93
|
|
|
|
|
|
|
This tests the given line and returns true if there is at least one |
94
|
|
|
|
|
|
|
UTF8 character sequence. (Actually the tests returns after the first |
95
|
|
|
|
|
|
|
sequence found.) C is returned if there is some other character |
96
|
|
|
|
|
|
|
with the 8th bit set. C<0> is returned if there are only characters |
97
|
|
|
|
|
|
|
from C<0x00> to C<0x7f>. |
98
|
|
|
|
|
|
|
|
99
|
|
|
|
|
|
|
=head1 BACKGROUND |
100
|
|
|
|
|
|
|
|
101
|
|
|
|
|
|
|
UTF8-Encoding looks like this: |
102
|
|
|
|
|
|
|
|
103
|
|
|
|
|
|
|
1111.0x: 1111.0000-1111.0111 0xF0 - 0xF7, followed by 3 bytes |
104
|
|
|
|
|
|
|
1110.xx: 1110.0000-1110.1111 0xE0 - 0xEF, followed by 2 bytes |
105
|
|
|
|
|
|
|
110x.xx: 1100.0000-1101.1111 0xC0 - 0xDF, followed by 1 byte |
106
|
|
|
|
|
|
|
10xx.xx: 1000.0000-1011.1111 0x80 - 0xBF (following byte as above) |
107
|
|
|
|
|
|
|
|
108
|
|
|
|
|
|
|
=head1 SEE ALSO |
109
|
|
|
|
|
|
|
|
110
|
|
|
|
|
|
|
L and L |
111
|
|
|
|
|
|
|
|
112
|
|
|
|
|
|
|
=head1 BUGS |
113
|
|
|
|
|
|
|
|
114
|
|
|
|
|
|
|
First release. Please do not rely on a stable API yet. If you're interested |
115
|
|
|
|
|
|
|
in stabilizing, please tell me. |
116
|
|
|
|
|
|
|
|
117
|
|
|
|
|
|
|
Probably. Not tested a lot! |
118
|
|
|
|
|
|
|
|
119
|
|
|
|
|
|
|
=head1 AUTHOR |
120
|
|
|
|
|
|
|
|
121
|
|
|
|
|
|
|
Heiko Schlittermann |
122
|
|
|
|
|
|
|
|
123
|
|
|
|
|
|
|
=cut |
124
|
|
|
|
|
|
|
|
125
|
|
|
|
|
|
|
|
126
|
|
|
|
|
|
|
1; |