1 files changed, 68 insertions, 0 deletions
diff --git a/src/mongo/util/base64.h b/src/mongo/util/base64.h
new file mode 100644
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+++ b/src/mongo/util/base64.h
@@ -0,0 +1,68 @@
+// util/base64.h
+
+/*    Copyright 2009 10gen Inc.
+ *
+ *    Licensed under the Apache License, Version 2.0 (the "License");
+ *    you may not use this file except in compliance with the License.
+ *    You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ */
+
+#pragma once
+
+namespace mongo {
+    namespace base64 {
+
+        class Alphabet {
+        public:
+            Alphabet()
+                : encode((unsigned char*)
+                         "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+                         "abcdefghijklmnopqrstuvwxyz"
+                         "0123456789"
+                         "+/")
+                , decode(new unsigned char[257]) {
+                memset( decode.get() , 0 , 256 );
+                for ( int i=0; i<64; i++ ) {
+                    decode[ encode[i] ] = i;
+                }
+
+                test();
+            }
+            void test() {
+                assert( strlen( (char*)encode ) == 64 );
+                for ( int i=0; i<26; i++ )
+                    assert( encode[i] == toupper( encode[i+26] ) );
+            }
+
+            char e( int x ) {
+                return encode[x&0x3f];
+            }
+
+        private:
+            const unsigned char * encode;
+        public:
+            boost::scoped_array<unsigned char> decode;
+        };
+
+        extern Alphabet alphabet;
+
+
+        void encode( stringstream& ss , const char * data , int size );
+        string encode( const char * data , int size );
+        string encode( const string& s );
+
+        void decode( stringstream& ss , const string& s );
+        string decode( const string& s );
+
+
+        void testAlphabet();
+    }
+}