1 files changed, 108 insertions, 0 deletions
diff --git a/mrblib/file.rb b/mrblib/file.rb
new file mode 100644
index 000000000..566085066
--- /dev/null
+++ b/mrblib/file.rb
@@ -0,0 +1,108 @@
+class File < IO
+  include Enumerable
+
+  class FileError < Exception; end
+  class NoFileError < FileError; end
+  class UnableToStat < FileError; end
+  class PermissionError < FileError; end
+
+  attr_accessor :path
+
+  def initialize(fd_or_path, mode = "r", perm = 0666)
+    self._bless
+    if fd_or_path.kind_of? Fixnum
+      super(fd_or_path, mode)
+    else
+      @path = fd_or_path
+
+      perm = 0666  unless perm.is_a? Fixnum
+      fd = IO.sysopen(@path, mode, perm)
+      if fd < 0 && Object.const_defined?(:Errno)
+        begin
+          Errno.handle @path
+        rescue Errno::EMFILE
+          GC.run(true)
+          fd = IO.sysopen(@path, mode, perm)
+          Errno.handle if fd < 0
+        end
+      elsif fd < 0
+        raise NoFileError.new "no such file or directory"
+      end
+      super(fd, mode)
+    end
+  end
+
+  def self.join(*names)
+    if names.size == 0
+      ""
+    elsif names.size == 1
+      names[0]
+    else
+      if names[0][-1] == File::SEPARATOR
+        s = names[0][0..-2]
+      else
+        s = names[0].dup
+      end
+      (1..names.size-2).each { |i|
+        t = names[i]
+        if t[0] == File::SEPARATOR and t[-1] == File::SEPARATOR
+          t = t[1..-2]
+        elsif t[0] == File::SEPARATOR
+          t = t[1..-1]
+        elsif t[-1] == File::SEPARATOR
+          t = t[0..-2]
+        end
+        s += File::SEPARATOR + t if t != ""
+      }
+      if names[-1][0] == File::SEPARATOR
+        s += File::SEPARATOR + names[-1][1..-1]
+      else
+        s += File::SEPARATOR + names[-1]
+      end
+      s
+    end
+  end
+
+  def self.directory?(file)
+    FileTest.directory?(file)
+  end
+
+  def self.exist?(file)
+    FileTest.exist?(file)
+  end
+
+  def self.exists?(file)
+    FileTest.exists?(file)
+  end
+
+  def self.file?(file)
+    FileTest.file?(file)
+  end
+
+  def self.pipe?(file)
+    FileTest.pipe?(file)
+  end
+
+  def self.size?(file)
+    FileTest.size?(file)
+  end
+
+  def self.socket?(file)
+    FileTest.socket?(file)
+  end
+
+  def self.symlink?(file)
+    FileTest.symlink?(file)
+  end
+
+  def self.zero?(file)
+    FileTest.zero?(file)
+  end
+
+  def self.extname(filename)
+    fname = self.basename(filename)
+    return '' if fname[0] == '.' || fname.index('.').nil?
+    ext = fname.split('.').last
+    ext.empty? ? '' : ".#{ext}"
+  end
+end