lib/perl5/5.6.1/abbrev.pl

   1 ;# Usage:
   2 ;#      %foo = ();
   3 ;#      &abbrev(*foo,LIST);
   4 ;#      ...
   5 ;#      $long = $foo{$short};
   6
   7 #
   8 # This library is no longer being maintained, and is included for backward
   9 # compatibility with Perl 4 programs which may require it.
  10 #
  11 # In particular, this should not be used as an example of modern Perl
  12 # programming techniques.
  13 #
  14 # Suggested alternative: Text::Abbrev
  15 #
  16
  17 package abbrev;
  18
  19 sub main'abbrev {
  20     local(*domain) = @_;
  21     shift(@_);
  22     @cmp = @_;
  23     local($[) = 0;
  24     foreach $name (@_) {
  25         @extra = split(//,$name);
  26         $abbrev = shift(@extra);
  27         $len = 1;
  28         foreach $cmp (@cmp) {
  29             next if $cmp eq $name;
  30             while (@extra && substr($cmp,0,$len) eq $abbrev) {
  31                 $abbrev .= shift(@extra);
  32                 ++$len;
  33             }
  34         }
  35         $domain{$abbrev} = $name;
  36         while ($#extra >= 0) {
  37             $abbrev .= shift(@extra);
  38             $domain{$abbrev} = $name;
  39         }
  40     }
  41 }
  42
  43 1;