Initial commit of OpenSPARC T2 architecture model.

[OpenSPARC-T2-SAM] / sam-t2 / devtools / amd64 / lib / perl5 / 5.8.8 / fastcwd.pl

# By John Bazik
#
# 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: Cwd
#
# Usage: $cwd = &fastcwd;
#
# This is a faster version of getcwd.  It's also more dangerous because
# you might chdir out of a directory that you can't chdir back into.

sub fastcwd {
       local($odev, $oino, $cdev, $cino, $tdev, $tino);
       local(@path, $path);
       local(*DIR);

       ($cdev, $cino) = stat('.');
       for (;;) {
               ($odev, $oino) = ($cdev, $cino);
               chdir('..');
               ($cdev, $cino) = stat('.');
               last if $odev == $cdev && $oino == $cino;
               opendir(DIR, '.');
               for (;;) {
                       $_ = readdir(DIR);
                       next if $_ eq '.';
                       next if $_ eq '..';

                       last unless $_;
                       ($tdev, $tino) = lstat($_);
                       last unless $tdev != $odev || $tino != $oino;
               }
               closedir(DIR);
               unshift(@path, $_);
       }
       chdir($path = '/' . join('/', @path));
       $path;
}
1;