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package SWIFT::Factory::Tag::Tag20; |
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use strict; |
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use warnings; |
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########################################################################################################### |
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# Provide a SWIFT TAG 20. |
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# |
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# Use this class to provide a Senders Reference. |
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# |
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########################################################################################################### |
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BEGIN{ |
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*provide=*string; |
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*borken=*invalid; |
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} |
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use vars qw($VERSION); |
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$VERSION='0.01'; |
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use constant REF_MAX_LEN=>16; |
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########################################################################################################### |
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sub new { |
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my$self={}; |
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bless($self,shift())->_init(@_); |
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} |
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########################################################################################################### |
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# The class cannot guarantee that the TAG will be valid in the SWIFT network. |
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# It can point out that it's found some invalid data, though. |
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# Return number of problems detected. |
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sub invalid { |
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my$self=shift; |
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# Implement verifications here! |
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0; |
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} |
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########################################################################################################### |
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sub ref_max_len { |
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REF_MAX_LEN; |
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} |
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########################################################################################################### |
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# If a new Reference is provided, store it for future use. |
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# If requested, return the stored Reference to the caller. |
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sub reference { |
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my($self,$reference)=@_; |
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defined($reference)&&$self->_store_reference($reference); |
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return(defined(wantarray)?wantarray?($self->{REFERENCE}):$self->{REFERENCE}:undef); |
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} |
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########################################################################################################### |
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sub string { |
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my$self=shift; |
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':20:'. |
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$self->{REFERENCE}. |
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chr(13). # CR |
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chr(10); # LF |
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} |
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########################################################################################################### |
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########################################################################################################### |
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# |
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# 'Internal' subs. Don't call these since they may, and will, change without notice. |
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# |
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########################################################################################################### |
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########################################################################################################### |
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########################################################################################################### |
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sub _init { |
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my$self=shift(); |
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my%args=( |
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DO_CLEANUP=>0, |
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REFERENCE=>'', |
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@_); |
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$self->{DO_CLEANUP}=defined($args{DO_CLEANUP})?$args{DO_CLEANUP}?1:0:0; |
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$self->_store_reference($args{REFERENCE}); |
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$self; |
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} |
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########################################################################################################### |
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# If Reference is defined, store it together with some simple cleanup applied. |
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sub _store_reference { |
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my($self,$reference)=@_; |
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0
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defined($reference)||return; |
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$self->{DO_CLEANUP}&&length($reference)>REF_MAX_LEN&&do{ |
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# Apply conditional warnings here! |
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0
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$reference=substr($reference,0,REF_MAX_LEN); |
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}; |
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$self->{REFERENCE}=$reference; |
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} |
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########################################################################################################### |
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'Choppers rule'; |
100
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__END__ |