Current File : //usr/lib/x86_64-linux-gnu/perl-base/AutoLoader.pm
package AutoLoader;
use strict;
use 5.006_001;
our($VERSION, $AUTOLOAD);
my $is_dosish;
my $is_epoc;
my $is_vms;
my $is_macos;
BEGIN {
$is_dosish = $^O eq 'dos' || $^O eq 'os2' || $^O eq 'MSWin32' || $^O eq 'NetWare';
$is_epoc = $^O eq 'epoc';
$is_vms = $^O eq 'VMS';
$is_macos = $^O eq 'MacOS';
$VERSION = '5.74';
}
AUTOLOAD {
my $sub = $AUTOLOAD;
autoload_sub($sub);
goto &$sub;
}
sub autoload_sub {
my $sub = shift;
my $filename = AutoLoader::find_filename( $sub );
my $save = $@;
local $!; # Do not munge the value.
eval { local $SIG{__DIE__}; require $filename };
if ($@) {
if (substr($sub,-9) eq '::DESTROY') {
no strict 'refs';
*$sub = sub {};
$@ = undef;
} elsif ($@ =~ /^Can't locate/) {
# The load might just have failed because the filename was too
# long for some old SVR3 systems which treat long names as errors.
# If we can successfully truncate a long name then it's worth a go.
# There is a slight risk that we could pick up the wrong file here
# but autosplit should have warned about that when splitting.
if ($filename =~ s/(\w{12,})\.al$/substr($1,0,11).".al"/e){
eval { local $SIG{__DIE__}; require $filename };
}
}
if ($@){
$@ =~ s/ at .*\n//;
my $error = $@;
require Carp;
Carp::croak($error);
}
}
$@ = $save;
return 1;
}
sub find_filename {
my $sub = shift;
my $filename;
# Braces used to preserve $1 et al.
{
# Try to find the autoloaded file from the package-qualified
# name of the sub. e.g., if the sub needed is
# Getopt::Long::GetOptions(), then $INC{Getopt/Long.pm} is
# something like '/usr/lib/perl5/Getopt/Long.pm', and the
# autoload file is '/usr/lib/perl5/auto/Getopt/Long/GetOptions.al'.
#
# However, if @INC is a relative path, this might not work. If,
# for example, @INC = ('lib'), then $INC{Getopt/Long.pm} is
# 'lib/Getopt/Long.pm', and we want to require
# 'auto/Getopt/Long/GetOptions.al' (without the leading 'lib').
# In this case, we simple prepend the 'auto/' and let the
# C<require> take care of the searching for us.
my ($pkg,$func) = ($sub =~ /(.*)::([^:]+)$/);
$pkg =~ s#::#/#g;
if (defined($filename = $INC{"$pkg.pm"})) {
if ($is_macos) {
$pkg =~ tr#/#:#;
$filename = undef
unless $filename =~ s#^(.*)$pkg\.pm\z#$1auto:$pkg:$func.al#s;
} else {
$filename = undef
unless $filename =~ s#^(.*)$pkg\.pm\z#$1auto/$pkg/$func.al#s;
}
# if the file exists, then make sure that it is a
# a fully anchored path (i.e either '/usr/lib/auto/foo/bar.al',
# or './lib/auto/foo/bar.al'. This avoids C<require> searching
# (and failing) to find the 'lib/auto/foo/bar.al' because it
# looked for 'lib/lib/auto/foo/bar.al', given @INC = ('lib').
if (defined $filename and -r $filename) {
unless ($filename =~ m|^/|s) {
if ($is_dosish) {
unless ($filename =~ m{^([a-z]:)?[\\/]}is) {
if ($^O ne 'NetWare') {
$filename = "./$filename";
} else {
$filename = "$filename";
}
}
}
elsif ($is_epoc) {
unless ($filename =~ m{^([a-z?]:)?[\\/]}is) {
$filename = "./$filename";
}
}
elsif ($is_vms) {
# XXX todo by VMSmiths
$filename = "./$filename";
}
elsif (!$is_macos) {
$filename = "./$filename";
}
}
}
else {
$filename = undef;
}
}
unless (defined $filename) {
# let C<require> do the searching
$filename = "auto/$sub.al";
$filename =~ s#::#/#g;
}
}
return $filename;
}
sub import {
my $pkg = shift;
my $callpkg = caller;
#
# Export symbols, but not by accident of inheritance.
#
if ($pkg eq 'AutoLoader') {
if ( @_ and $_[0] =~ /^&?AUTOLOAD$/ ) {
no strict 'refs';
*{ $callpkg . '::AUTOLOAD' } = \&AUTOLOAD;
}
}
#
# Try to find the autosplit index file. Eg., if the call package
# is POSIX, then $INC{POSIX.pm} is something like
# '/usr/local/lib/perl5/POSIX.pm', and the autosplit index file is in
# '/usr/local/lib/perl5/auto/POSIX/autosplit.ix', so we require that.
#
# However, if @INC is a relative path, this might not work. If,
# for example, @INC = ('lib'), then
# $INC{POSIX.pm} is 'lib/POSIX.pm', and we want to require
# 'auto/POSIX/autosplit.ix' (without the leading 'lib').
#
(my $calldir = $callpkg) =~ s#::#/#g;
my $path = $INC{$calldir . '.pm'};
if (defined($path)) {
# Try absolute path name, but only eval it if the
# transformation from module path to autosplit.ix path
# succeeded!
my $replaced_okay;
if ($is_macos) {
(my $malldir = $calldir) =~ tr#/#:#;
$replaced_okay = ($path =~ s#^(.*)$malldir\.pm\z#$1auto:$malldir:autosplit.ix#s);
} else {
$replaced_okay = ($path =~ s#^(.*)$calldir\.pm\z#$1auto/$calldir/autosplit.ix#);
}
eval { require $path; } if $replaced_okay;
# If that failed, try relative path with normal @INC searching.
if (!$replaced_okay or $@) {
$path ="auto/$calldir/autosplit.ix";
eval { require $path; };
}
if ($@) {
my $error = $@;
require Carp;
Carp::carp($error);
}
}
}
sub unimport {
my $callpkg = caller;
no strict 'refs';
for my $exported (qw( AUTOLOAD )) {
my $symname = $callpkg . '::' . $exported;
undef *{ $symname } if \&{ $symname } == \&{ $exported };
*{ $symname } = \&{ $symname };
}
}
1;
__END__
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