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package Text::Abbrev;
require 5.000;
require Exporter;
=head1 NAME
abbrev - create an abbreviation table from a list
=head1 SYNOPSIS
use Abbrev;
abbrev *HASH, LIST
=head1 DESCRIPTION
Stores all unambiguous truncations of each element of LIST
as keys key in the associative array indicated by C<*hash>.
The values are the original list elements.
=head1 EXAMPLE
abbrev(*hash,qw("list edit send abort gripe"));
=cut
@ISA = qw(Exporter);
@EXPORT = qw(abbrev);
# Usage:
# &abbrev(*foo,LIST);
# ...
# $long = $foo{$short};
sub abbrev {
local(*domain) = shift;
@cmp = @_;
%domain = ();
foreach $name (@_) {
@extra = split(//,$name);
$abbrev = shift(@extra);
$len = 1;
foreach $cmp (@cmp) {
next if $cmp eq $name;
while (substr($cmp,0,$len) eq $abbrev) {
$abbrev .= shift(@extra);
++$len;
}
}
$domain{$abbrev} = $name;
while (@extra) {
$abbrev .= shift(@extra);
$domain{$abbrev} = $name;
}
}
}
1;
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