Text::Query::SolveSimpleString - Apply query expression on strings

Text-Query documentation Contained in the Text-Query distribution.

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NAME

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Text::Query::SolveSimpleString - Apply query expression on strings

SYNOPSIS

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  use Text::Query;
  my $q=new Text::Query('+hello +world',
                        -parse => 'Text::Query::ParseSimple',
                        -solve => 'Text::Query::SolveSimpleString',
                        -build => 'Text::Query::BuildSimpleString');

  $q->match('this hello is a world')

DESCRIPTION

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Applies an expression built by Text::Query::BuildSimpleString to a list of strings.

METHODS

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match ([TARGET])

If TARGET is a scalar, match returns a true value if the string specified by TARGET matches the query object's query expression. If TARGET is not given, the match is made against $_.

If TARGET is an array, match returns a (possibly empty) list of all matching elements. If the elements of the array are references to sub- arrays, the match is done against the first element of each sub-array. This allows arbitrary information (e.g. filenames) to be associated with each string to match.

If TARGET is a reference to an array, match returns a reference to a (possibly empty) list of all matching elements.

matchscalar ([TARGET])

Behaves just like MATCH when TARGET is a scalar or is not given. Slightly faster than MATCH under these circumstances.

AUTHORS

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Eric Bohlman (ebohlman@netcom.com)

Loic Dachary (loic@senga.org)

Text-Query documentation Contained in the Text-Query distribution. 
#
#   Copyright (C) 1999 Eric Bohlman, Loic Dachary
#
#   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, or (at your option) any
#   later version.  You may also use, redistribute and/or modify it
#   under the terms of the Artistic License supplied with your Perl
#   distribution
#
#   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, 675 Mass Ave, Cambridge, MA 02139, USA. 
#
# 
# $Header: /usr/local/cvsroot/Text-Query/lib/Text/Query/SolveSimpleString.pm,v 1.1.1.1 1999/06/14 11:26:50 loic Exp $
#
package Text::Query::SolveSimpleString;

BEGIN {
  require 5.005;
}

use strict;

use Text::Query::Solve;

use vars qw(@ISA);

@ISA = qw(Text::Query::Solve);

sub initialize {
}

sub match {
  my($self) = shift;
  my($expr) = shift;
  return $self->matchscalar($expr, shift || $_) if(@_ <= 1 && ref($_[0]) ne 'ARRAY');
  my($pa) = (@_ == 1 && ref($_[0]) eq 'ARRAY') ? shift : \@_;

  my(@ra);
  if(ref($pa->[0]) eq 'ARRAY') {
    @ra = map { [ @$_, $self->matchscalar($expr, $_->[0]) ] } @$pa;
  } else {
    @ra = map { [ $_, $self->matchscalar($expr, $_) ] } @$pa;
  }
  @ra = sort { $b->[$#{@$b}] <=> $a->[$#{@$a}] } @ra;
  return wantarray ? @ra : \@ra;
}

sub matchscalar {
  my($self) = shift;
  my($expr) = shift;

  my($target) = (shift || $_);
  my($cnt) = 0;
  my($re, $ws) = @$expr;

  while($target =~ /$re/g) {
    return 0 if(!$^R->[0]);
    $cnt += $^R->[1];
    $ws &= $^R->[0];
  }
  
  return $ws ? 0 : $cnt;
}

1;

__END__


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