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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
#include <iosfwd>
#include <memory>
#include <string>
#include "mongo/util/assert_util.h"
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:
std::unique_ptr<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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