source: trunk/essentials/dev-lang/perl/lib/abbrev.pl

;# Usage:
;#      %foo = ();
;#      &abbrev(*foo,LIST);
;#      ...
;#      $long = $foo{$short};

#
# This library is no longer being maintained, and is included for backward
# compatibility with Perl 4 programs which may require it.
#
# In particular, this should not be used as an example of modern Perl
# programming techniques.
#
# Suggested alternative: Text::Abbrev
#

package abbrev;

sub main'abbrev {
    local(*domain) = @_;
    shift(@_);
    @cmp = @_;
    local($[) = 0;
    foreach $name (@_) {
        @extra = split(//,$name);
        $abbrev = shift(@extra);
        $len = 1;
        foreach $cmp (@cmp) {
            next if $cmp eq $name;
            while (@extra && substr($cmp,0,$len) eq $abbrev) {
                $abbrev .= shift(@extra);
                ++$len;
            }
        }
        $domain{$abbrev} = $name;
        while ($#extra >= 0) {
            $abbrev .= shift(@extra);
            $domain{$abbrev} = $name;
        }
    }
}

1;