* ext/digest/lib/digest.rb (Digest::Base.file): new method.

[ruby-dev:29572]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@10928 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Thu Sep 14 14:37:45 2006  Tanaka Akira  <akr@fsij.org>
+
+	* ext/digest/lib/digest.rb (Digest::Base.file): new method.
+	  [ruby-dev:29572]
+
 Thu Sep 14 08:30:02 2006  Tanaka Akira  <akr@fsij.org>
 
 	* ext/digest/digest.c (rb_digest_base_inspect): new method.

ext/digest/lib/digest.rb

@@ -5,4 +5,17 @@ module Digest
   autoload "SHA256", "digest/sha2"
   autoload "SHA384", "digest/sha2"
   autoload "SHA512", "digest/sha2"
+
+  class Base
+    def self.file(name)
+      digest = self.new
+      File.open(name) {|f|
+        buf = ""
+        while f.read(16384, buf)
+          digest.update buf
+        end
+      }
+      digest
+    end
+  end
 end