# NOTE: Derived from DynaLoader.pm.  Changes made here will be lost.
package DynaLoader;

sub dl_findfile {
    # Read ext/DynaLoader/DynaLoader.doc for detailed information.
    # This function does not automatically consider the architecture
    # or the perl library auto directories.
    my (@args) = @_;
    my (@dirs,  $dir);   # which directories to search
    my (@found);         # full paths to real files we have found
    my $dl_ext= $Config::Config{'dlext'}; # suffix for perl extensions
    my $dl_so = $Config::Config{'so'};	# suffix for shared libraries

    print STDERR "dl_findfile(@args)\n" if $dl_debug;

    # accumulate directories but process files as they appear
    arg: foreach(@args) {
        #  Special fast case: full filepath requires no search
        if ($Is_VMS && m%[:>/\]]% && -f $_) {
	    push(@found,dl_expandspec(VMS::Filespec::vmsify($_)));
	    last arg unless wantarray;
	    next;
        }
	elsif ($Is_MacOS && m/:/ && -f $_) {
	    push(@found,$_);
	    last arg unless wantarray;
	    next;
	}
        elsif (m:/: && -f $_ && !$do_expand) {
	    push(@found,$_);
	    last arg unless wantarray;
	    next;
	}

        # Deal with directories first:
        #  Using a -L prefix is the preferred option (faster and more robust)
        if (m:^-L:) { s/^-L//; push(@dirs, $_); next; }

	if ($Is_MacOS) {
	     #  Otherwise we try to try to spot directories by a heuristic
             #  (this is a more complicated issue than it first appears)
             if (m/:/ && -d $_) {   push(@dirs, $_); next; }

            #  Only files should get this far...
            my(@names, $name);    # what filenames to look for
            if (m:-l: ) {          # convert -lname to appropriate library name
		s/-l//;
		push(@names,"$_");
            } else {                # Umm, a bare name. Try various alternatives:
            	push(@names, $_);
            }
            foreach $dir (@dirs, @dl_library_path) {
            	next unless -d $dir;
		$dir =~ s/:$//;
		$dir =~ s/^([^:]+)$/:$1/;
            	foreach $name (@names) {
		    my($file) = "$dir:$name";
                    print STDERR " checking in $dir for $name\n" if $dl_debug;
		    if (-f $file) {
                    	push(@found, $file);
                    	next arg; # no need to look any further
                    }
                }
            }
	} else {
	     #  Otherwise we try to try to spot directories by a heuristic
             #  (this is a more complicated issue than it first appears)
             if (m:/: && -d $_) {   push(@dirs, $_); next; }

            # VMS: we may be using native VMS directry syntax instead of
            # Unix emulation, so check this as well
            if ($Is_VMS && /[:>\]]/ && -d $_) {   push(@dirs, $_); next; }

            #  Only files should get this far...
            my(@names, $name);    # what filenames to look for
            if (m:-l: ) {          # convert -lname to appropriate library name
		s/-l//;
		push(@names,"lib$_.$dl_so");
		push(@names,"lib$_.a");
            } else {                # Umm, a bare name. Try various alternatives:
            	# these should be ordered with the most likely first
            	push(@names,"$_.$dl_ext")    unless m/\.$dl_ext$/o;
            	push(@names,"$_.$dl_so")     unless m/\.$dl_so$/o;
            	push(@names,"lib$_.$dl_so")  unless m:/:;
            	push(@names,"$_.a")          if !m/\.a$/ and $dlsrc eq "dl_dld.xs";
            	push(@names, $_);
            }
            foreach $dir (@dirs, @dl_library_path) {
            	next unless -d $dir;
            	chop($dir = VMS::Filespec::unixpath($dir)) if $Is_VMS;
            	foreach $name (@names) {
		    my($file) = "$dir/$name";
                    print STDERR " checking in $dir for $name\n" if $dl_debug;
		    $file = _check_file($file);
		    if ($file) {
                    	push(@found, $file);
                    	next arg; # no need to look any further
                    }
                }
            }
	}
    }
    if ($dl_debug) {
        foreach(@dirs) {
            print STDERR " dl_findfile ignored non-existent directory: $_\n" unless -d $_;
        }
        print STDERR "dl_findfile found: @found\n";
    }
    return $found[0] unless wantarray;
    @found;
}


1;