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# $Revision: #4 $$Date: 2005/08/31 $$Author: jd150722 $ |
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###################################################################### |
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# |
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# This program is Copyright 2003-2005 by Jeff Dutton. |
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# |
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# This program is free software; you can redistribute it and/or modify |
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# it under the terms of either the GNU General Public License or the |
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# Perl Artistic License. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# If you do not have a copy of the GNU General Public License write to |
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# the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, |
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# MA 02139, USA. |
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###################################################################### |
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package Parse::RandGen::Subrule; |
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require 5.006_001; |
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use Carp; |
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use Parse::RandGen qw($Debug); |
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use strict; |
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use vars qw(@ISA $Debug); |
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@ISA = ('Parse::RandGen::Condition'); |
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sub _newDerived { } # Nothing to do |
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sub isSubrule { return 1; } |
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sub isTerminal { return 0; } |
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sub isQuantSupported { return 1; } |
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sub subrule { |
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404
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404
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my $self = shift or confess ("%Error: Cannot call without a valid object!"); |
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my $subrule = $self->element(); |
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if (ref($subrule)) { |
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UNIVERSAL::isa($subrule, "Parse::RandGen::Rule") or confess("subrule() contains a reference ($subrule), but it is not a Rule!"); |
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return($subrule); |
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} else { |
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defined($self->grammar()) or confess ("%Error: Parse::RandGen::Subrule::subrule() called, but the \"$subrule\" rule cannot be found, because grammar() is undef!"); |
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return($self->grammar()->rule($subrule)); |
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} |
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} |
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sub dump { |
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my $self = shift or confess ("%Error: Cannot call without a valid object!"); |
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my $subrule = $self->element(); |
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if (ref($subrule)) { |
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return ($subrule->dumpHeir() . $self->quant()); |
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} else { |
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# Named non-reference rule |
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my $output = $subrule; |
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if (defined($self->max()) && ($self->min() == $self->max())) { |
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$output .= "(" . $self->min() . ")" unless ($self->min() == 1); |
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} else { |
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my $max = defined($self->max()) ? $self->max() : ""; |
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$output .= "(" . $self->min() . ".." . $max . ")"; |
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} |
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return $output; |
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} |
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} |
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sub pick { |
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my $self = shift or confess ("%Error: Cannot call without a valid object!"); |
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my %args = ( match=>1, # Default is to pick matching data |
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@_ ); |
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my $rule = $self->subrule(); |
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my $ruleName = $self->element(); |
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defined($rule) or confess("Subrule::pick(): $ruleName subrule cannot be found in the grammar!\n"); |
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my %result = $self->pickRepetitions(%args); |
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my $matchCnt = $result{matchCnt}; |
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my $badOne = $result{badOne}; |
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my $val = ""; |
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for (my $i=0; $i<$matchCnt; $i++) { |
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my $matchThis = (defined($badOne) && ($i==$badOne))?0:1; # Only don't match for corrupted data |
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my $specifiedVals = ($matchThis && ($i==($matchCnt-1))) ? $args{vals} : { }; # Only specify rules for last capture value |
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$val .= $rule->pick(%args, match=>$matchThis, vals => $specifiedVals); |
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} |
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if ($Debug) { |
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print("Parse::RandGen::Subrule::pick(match=>$args{match}, matchCnt=>$matchCnt, badOne=>".(defined($badOne)?$badOne:"undef") |
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.") on the rule \"".$rule->dumpHeir()."\" has a value of ".$self->dumpVal($val)."\n"); |
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} |
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return ($val); |
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} |
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# Returns true (1) if this subrule contains any of the rules specified by the "vals" argument |
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sub containsVals { |
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my $self = shift or confess("%Error: Cannot call without a valid object!"); |
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my %args = ( vals => { }, # Hash of values of various hard-coded sub-rules (by name) |
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@_ ); |
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return $self->subrule()->containsVals(%args); |
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} |
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###################################################################### |
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#### Package return |
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1; |
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__END__ |