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// 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();
}
}
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