share/automake-1.10/Automake/General.pm

   1 # Copyright (C) 2001, 2003  Free Software Foundation, Inc.
   2
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU General Public License as published by
   5 # the Free Software Foundation; either version 2, or (at your option)
   6 # any later version.
   7
   8 # This program is distributed in the hope that it will be useful,
   9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 # GNU General Public License for more details.
  12
  13 # You should have received a copy of the GNU General Public License
  14 # along with this program; if not, write to the Free Software
  15 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  16 # 02110-1301, USA.
  17
  18 package Automake::General;
  19
  20 use 5.005;
  21 use strict;
  22 use Exporter;
  23 use File::Basename;
  24
  25 use vars qw (@ISA @EXPORT);
  26
  27 @ISA = qw (Exporter);
  28 @EXPORT = qw (&uniq $me);
  29
  30 # Variable we share with the main package.  Be sure to have a single
  31 # copy of them: using `my' together with multiple inclusion of this
  32 # package would introduce several copies.
  33 use vars qw ($me);
  34 $me = basename ($0);
  35
  36 # END
  37 # ---
  38 # Exit nonzero whenever closing STDOUT fails.
  39 sub END
  40 {
  41   # This is required if the code might send any output to stdout
  42   # E.g., even --version or --help.  So it's best to do it unconditionally.
  43   if (! close STDOUT)
  44     {
  45       print STDERR "$me: closing standard output: $!\n";
  46       $? = 74; # EX_IOERR
  47       return;
  48     }
  49 }
  50
  51
  52 # @RES
  53 # uniq (@LIST)
  54 # ------------
  55 # Return LIST with no duplicates.
  56 sub uniq (@)
  57 {
  58    my @res = ();
  59    my %seen = ();
  60    foreach my $item (@_)
  61      {
  62        if (! exists $seen{$item})
  63          {
  64            $seen{$item} = 1;
  65            push (@res, $item);
  66          }
  67      }
  68    return wantarray ? @res : "@res";
  69 }
  70
  71
  72 1; # for require
  73
  74 ### Setup "GNU" style for perl-mode and cperl-mode.
  75 ## Local Variables:
  76 ## perl-indent-level: 2
  77 ## perl-continued-statement-offset: 2
  78 ## perl-continued-brace-offset: 0
  79 ## perl-brace-offset: 0
  80 ## perl-brace-imaginary-offset: 0
  81 ## perl-label-offset: -2
  82 ## cperl-indent-level: 2
  83 ## cperl-brace-offset: 0
  84 ## cperl-continued-brace-offset: 0
  85 ## cperl-label-offset: -2
  86 ## cperl-extra-newline-before-brace: t
  87 ## cperl-merge-trailing-else: nil
  88 ## cperl-continued-statement-offset: 2
  89 ## End: