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// util/base64.h
/* Copyright 2009 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#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() {
verify( strlen( (char*)encode ) == 64 );
for ( int i=0; i<26; i++ )
verify( 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( std::stringstream& ss , const char * data , int size );
std::string encode( const char * data , int size );
std::string encode( const std::string& s );
void decode( std::stringstream& ss , const std::string& s );
std::string decode( const std::string& s );
extern const char* chars;
void testAlphabet();
}
}
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