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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library 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
* OpenSceneGraph Public License for more details.
*/
/* This file is derived from the libb64 project which itself was released to public domain.
* For details, see http://sourceforge.net/projects/libb64. Original code by Chris Venter
* c++ wrapper for a base64 encoding and decoding algorithm
*/
#ifndef OSGDB_CONVERTBASE64_H
#define OSGDB_CONVERTBASE64_H 1
#include <iostream>
#include <string>
#include <vector>
#include <osgDB/Export>
namespace osgDB
{
const int BUFFERSIZE = 8192;
typedef enum
{
step_a, step_b, step_c, step_d
} base64_decodestep;
typedef enum
{
step_A, step_B, step_C
} base64_encodestep;
typedef struct
{
base64_encodestep step;
char result;
int stepcount;
} base64_encodestate;
inline void base64_init_encodestate(base64_encodestate* state_in)
{
state_in->step = step_A;
state_in->result = 0;
state_in->stepcount = 0;
}
typedef struct
{
base64_decodestep step;
char plainchar;
} base64_decodestate;
inline void base64_init_decodestate(base64_decodestate* state_in)
{
state_in->step = step_a;
state_in->plainchar = 0;
}
class OSGDB_EXPORT Base64encoder
{
public:
Base64encoder(int buffersize_in = BUFFERSIZE):
_buffersize(buffersize_in)
{
base64_init_encodestate(&_state);
}
int encode(char value_in);
int encode(const char* code_in, const int length_in, char* plaintext_out);
int encode_end(char* plaintext_out);
void encode(std::istream& istream_in, std::ostream& ostream_in);
void encode(const char* chars_in, int length_in, std::string& code_out);
private:
base64_encodestate _state;
int _buffersize;
};
class OSGDB_EXPORT Base64decoder
{
public:
Base64decoder(int buffersize_in = BUFFERSIZE):
_buffersize(buffersize_in)
{
base64_init_decodestate(&_state);
}
int decode(char value_in);
int decode(const char* code_in, const int length_in, char* plaintext_out);
void decode(std::istream& istream_in, std::ostream& ostream_in);
// Decode strings, returns one char* of appropriate size
// Note that deallocation of char* is up to the caller of this method
char* decode(const std::vector<std::string>& str_in, std::vector<unsigned int>& pos_out);
private:
base64_decodestate _state;
int _buffersize;
};
} // namespace osgDB
#endif // BASE64_DECODE_H
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