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package BLOB; |
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use strict; |
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use Carp qw(carp); |
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use Exporter (); |
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# No "our" in Perl 5.0 |
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use vars qw(@ISA $VERSION @EXPORT); |
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$VERSION = '1.01'; |
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@ISA = qw(Exporter); |
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@EXPORT = qw(mark_blob is_blob); |
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# Fallback for Perl < 5.8 |
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*utf8::downgrade = sub { 1 } if not defined &utf8::downgrade; |
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# Class method |
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sub mark { |
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my $class = shift; |
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my $blob_ref = \shift; |
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if (not utf8::downgrade($$blob_ref, 1)) { |
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0
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carp "Wide character outside byte range in BLOB, encoding data with UTF-8"; |
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utf8::encode($$blob_ref); |
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} |
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bless $blob_ref, $class; |
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} |
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# Function |
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sub mark_blob { |
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BLOB->mark($_[0]); |
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} |
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# Function |
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sub is_blob { |
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my $blob_ref = \shift; |
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100
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return undef if not eval { $blob_ref->isa('BLOB') }; |
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if (not utf8::downgrade($$blob_ref, 1)) { |
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0
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carp "Wide character outside byte range in BLOB, encoding data with UTF-8"; |
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utf8::encode($$blob_ref); |
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} |
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return 1; |
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} |
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1; |
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__END__ |