121 lines
3.1 KiB
C++
121 lines
3.1 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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/* This file is derived from the libb64 project which itself was released to public domain.
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* For details, see http://sourceforge.net/projects/libb64. Original code by Chris Venter
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* c++ wrapper for a base64 encoding and decoding algorithm
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*/
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#ifndef OSGDB_CONVERTBASE64_H
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#define OSGDB_CONVERTBASE64_H 1
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#include <iostream>
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#include <string>
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#include <vector>
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#include <osgDB/Export>
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namespace osgDB
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{
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const int BUFFERSIZE = 8192;
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typedef enum
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{
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step_a, step_b, step_c, step_d
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} base64_decodestep;
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typedef enum
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{
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step_A, step_B, step_C
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} base64_encodestep;
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typedef struct
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{
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base64_encodestep step;
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char result;
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int stepcount;
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} base64_encodestate;
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inline void base64_init_encodestate(base64_encodestate* state_in)
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{
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state_in->step = step_A;
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state_in->result = 0;
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state_in->stepcount = 0;
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}
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typedef struct
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{
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base64_decodestep step;
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char plainchar;
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} base64_decodestate;
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inline void base64_init_decodestate(base64_decodestate* state_in)
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{
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state_in->step = step_a;
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state_in->plainchar = 0;
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}
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class OSGDB_EXPORT Base64encoder
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{
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public:
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Base64encoder(int buffersize_in = BUFFERSIZE):
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_buffersize(buffersize_in)
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{
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base64_init_encodestate(&_state);
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}
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int encode(char value_in);
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int encode(const char* code_in, const int length_in, char* plaintext_out);
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int encode_end(char* plaintext_out);
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void encode(std::istream& istream_in, std::ostream& ostream_in);
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void encode(const char* chars_in, int length_in, std::string& code_out);
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private:
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base64_encodestate _state;
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int _buffersize;
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};
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class OSGDB_EXPORT Base64decoder
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{
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public:
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Base64decoder(int buffersize_in = BUFFERSIZE):
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_buffersize(buffersize_in)
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{
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base64_init_decodestate(&_state);
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}
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int decode(char value_in);
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int decode(const char* code_in, const int length_in, char* plaintext_out);
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void decode(std::istream& istream_in, std::ostream& ostream_in);
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// Decode strings, returns one char* of appropriate size
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// Note that deallocation of char* is up to the caller of this method
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char* decode(const std::vector<std::string>& str_in, std::vector<unsigned int>& pos_out);
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private:
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base64_decodestate _state;
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int _buffersize;
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};
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} // namespace osgDB
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#endif // BASE64_DECODE_H
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