package File::Spec::Epoc; use strict; use Cwd; use vars qw(@ISA); require File::Spec::Unix; @ISA = qw(File::Spec::Unix); =head1 NAME File::Spec::Epoc - methods for Epoc file specs =head1 SYNOPSIS require File::Spec::Epoc; # Done internally by File::Spec if needed =head1 DESCRIPTION See File::Spec::Unix for a documentation of the methods provided there. This package overrides the implementation of these methods, not the semantics. This package is still work in progress ;-) o.flebbe@gmx.de =over =item devnull Returns a string representation of the null device. =cut sub devnull { return "nul:"; } =item tmpdir Returns a string representation of a temporay directory: =cut my $tmpdir; sub tmpdir { return "C:/System/temp"; } sub case_tolerant { return 1; } sub file_name_is_absolute { my ($self,$file) = @_; return scalar($file =~ m{^([a-z?]:)?[\\/]}is); } =item path Takes no argument, returns the environment variable PATH as an array. Since there is no search path supported, it returns undef, sorry. =cut sub path { return undef; } =item canonpath No physical check on the filesystem, but a logical cleanup of a path. On UNIX eliminated successive slashes and successive "/.". =cut sub canonpath { my ($self,$path) = @_; $path =~ s/^([a-z]:)/\u$1/s; $path =~ s|/+|/|g unless($^O eq 'cygwin'); # xx////xx -> xx/xx $path =~ s|(/\.)+/|/|g; # xx/././xx -> xx/xx $path =~ s|^(\./)+||s unless $path eq "./"; # ./xx -> xx $path =~ s|^/(\.\./)+|/|s; # /../../xx -> xx $path =~ s|/\z|| unless $path eq "/"; # xx/ -> xx return $path; } =item splitpath ($volume,$directories,$file) = File::Spec->splitpath( $path ); ($volume,$directories,$file) = File::Spec->splitpath( $path, $no_file ); Splits a path in to volume, directory, and filename portions. Assumes that the last file is a path unless the path ends in '\\', '\\.', '\\..' or $no_file is true. On Win32 this means that $no_file true makes this return ( $volume, $path, undef ). Separators accepted are \ and /. The results can be passed to L to get back a path equivalent to (usually identical to) the original path. =cut sub splitpath { my ($self,$path, $nofile) = @_; my ($volume,$directory,$file) = ('','',''); if ( $nofile ) { $path =~ m{^( (?:[a-zA-Z?]:|(?:\\\\|//)[^\\/]+[\\/][^\\/]+)? ) (.*) }xs; $volume = $1; $directory = $2; } else { $path =~ m{^ ( (?: [a-zA-Z?]: | (?:\\\\|//)[^\\/]+[\\/][^\\/]+ )? ) ( (?:.*[\\\\/](?:\.\.?\z)?)? ) (.*) }xs; $volume = $1; $directory = $2; $file = $3; } return ($volume,$directory,$file); } =item splitdir The opposite of L. @dirs = File::Spec->splitdir( $directories ); $directories must be only the directory portion of the path on systems that have the concept of a volume or that have path syntax that differentiates files from directories. Unlike just splitting the directories on the separator, leading empty and trailing directory entries can be returned, because these are significant on some OSs. So, File::Spec->splitdir( "/a/b/c" ); Yields: ( '', 'a', 'b', '', 'c', '' ) =cut sub splitdir { my ($self,$directories) = @_ ; # # split() likes to forget about trailing null fields, so here we # check to be sure that there will not be any before handling the # simple case. # if ( $directories !~ m|[\\/]\z| ) { return split( m|[\\/]|, $directories ); } else { # # since there was a trailing separator, add a file name to the end, # then do the split, then replace it with ''. # my( @directories )= split( m|[\\/]|, "${directories}dummy" ) ; $directories[ $#directories ]= '' ; return @directories ; } } =item catpath Takes volume, directory and file portions and returns an entire path. Under Unix, $volume is ignored, and this is just like catfile(). On other OSs, the $volume become significant. =cut sub catpath { my ($self,$volume,$directory,$file) = @_; # If it's UNC, make sure the glue separator is there, reusing # whatever separator is first in the $volume $volume .= $1 if ( $volume =~ m@^([\\/])[\\/][^\\/]+[\\/][^\\/]+\z@s && $directory =~ m@^[^\\/]@s ) ; $volume .= $directory ; # If the volume is not just A:, make sure the glue separator is # there, reusing whatever separator is first in the $volume if possible. if ( $volume !~ m@^[a-zA-Z]:\z@s && $volume =~ m@[^\\/]\z@ && $file =~ m@[^\\/]@ ) { $volume =~ m@([\\/])@ ; my $sep = $1 ? $1 : '\\' ; $volume .= $sep ; } $volume .= $file ; return $volume ; } =item abs2rel Takes a destination path and an optional base path returns a relative path from the base path to the destination path: $rel_path = File::Spec->abs2rel( $destination ) ; $rel_path = File::Spec->abs2rel( $destination, $base ) ; If $base is not present or '', then L is used. If $base is relative, then it is converted to absolute form using L. This means that it is taken to be relative to L. On systems with the concept of a volume, this assumes that both paths are on the $destination volume, and ignores the $base volume. On systems that have a grammar that indicates filenames, this ignores the $base filename as well. Otherwise all path components are assumed to be directories. If $path is relative, it is converted to absolute form using L. This means that it is taken to be relative to L. Based on code written by Shigio Yamaguchi. No checks against the filesystem are made. =cut sub abs2rel { my($self,$path,$base) = @_; # Clean up $path if ( ! $self->file_name_is_absolute( $path ) ) { $path = $self->rel2abs( $path ) ; } else { $path = $self->canonpath( $path ) ; } # Figure out the effective $base and clean it up. if ( ! $self->file_name_is_absolute( $base ) ) { $base = $self->rel2abs( $base ) ; } elsif ( !defined( $base ) || $base eq '' ) { $base = cwd() ; } else { $base = $self->canonpath( $base ) ; } # Split up paths my ( $path_volume, $path_directories, $path_file ) = $self->splitpath( $path, 1 ) ; my ( undef, $base_directories, undef ) = $self->splitpath( $base, 1 ) ; # Now, remove all leading components that are the same my @pathchunks = $self->splitdir( $path_directories ); my @basechunks = $self->splitdir( $base_directories ); while ( @pathchunks && @basechunks && lc( $pathchunks[0] ) eq lc( $basechunks[0] ) ) { shift @pathchunks ; shift @basechunks ; } # No need to catdir, we know these are well formed. $path_directories = CORE::join( '\\', @pathchunks ); $base_directories = CORE::join( '\\', @basechunks ); # $base_directories now contains the directories the resulting relative # path must ascend out of before it can descend to $path_directory. So, # replace all names with $parentDir #FA Need to replace between backslashes... $base_directories =~ s|[^\\]+|..|g ; # Glue the two together, using a separator if necessary, and preventing an # empty result. #FA Must check that new directories are not empty. if ( $path_directories ne '' && $base_directories ne '' ) { $path_directories = "$base_directories\\$path_directories" ; } else { $path_directories = "$base_directories$path_directories" ; } # It makes no sense to add a relative path to a UNC volume $path_volume = '' unless $path_volume =~ m{^[A-Z]:}is ; return $self->canonpath( $self->catpath($path_volume, $path_directories, $path_file ) ) ; } =item rel2abs Converts a relative path to an absolute path. $abs_path = File::Spec->rel2abs( $destination ) ; $abs_path = File::Spec->rel2abs( $destination, $base ) ; If $base is not present or '', then L is used. If $base is relative, then it is converted to absolute form using L. This means that it is taken to be relative to L. Assumes that both paths are on the $base volume, and ignores the $destination volume. On systems that have a grammar that indicates filenames, this ignores the $base filename as well. Otherwise all path components are assumed to be directories. If $path is absolute, it is cleaned up and returned using L. Based on code written by Shigio Yamaguchi. No checks against the filesystem are made. =cut sub rel2abs($;$;) { my ($self,$path,$base ) = @_; if ( ! $self->file_name_is_absolute( $path ) ) { if ( !defined( $base ) || $base eq '' ) { $base = cwd() ; } elsif ( ! $self->file_name_is_absolute( $base ) ) { $base = $self->rel2abs( $base ) ; } else { $base = $self->canonpath( $base ) ; } my ( undef, $path_directories, $path_file ) = $self->splitpath( $path, 1 ) ; my ( $base_volume, $base_directories, undef ) = $self->splitpath( $base, 1 ) ; $path = $self->catpath( $base_volume, $self->catdir( $base_directories, $path_directories ), $path_file ) ; } return $self->canonpath( $path ) ; } =back =head1 SEE ALSO L =cut 1;