1 files changed, 27 insertions, 0 deletions
diff --git a/ext/digest/lib/digest.rb b/ext/digest/lib/digest.rb
new file mode 100644
index 0000000000..c277a0eea5
--- /dev/null
+++ b/ext/digest/lib/digest.rb
@@ -0,0 +1,27 @@
+require 'digest.so'
+
+module Digest
+  autoload "MD5", "digest/md5"
+  autoload "RMD160", "digest/rmd160"
+  autoload "SHA1", "digest/sha1"
+  autoload "SHA256", "digest/sha2"
+  autoload "SHA384", "digest/sha2"
+  autoload "SHA512", "digest/sha2"
+
+  class Base
+    # creates a digest object and read given file, _name_.
+    # 
+    #  p Digest::SHA256.file("X11R6.8.2-src.tar.bz2").hexdigest
+    #  # => "f02e3c85572dc9ad7cb77c2a638e3be24cc1b5bea9fdbb0b0299c9668475c534"
+    def self.file(name)
+      digest = self.new
+      File.open(name, "rb") {|f|
+        buf = ""
+        while f.read(16384, buf)
+          digest.update buf
+        end
+      }
+      digest
+    end
+  end
+end