1/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield 2 * 3 * This library is open source and may be redistributed and/or modified under 4 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 5 * (at your option) any later version. The full license is in LICENSE file 6 * included with this distribution, and on the openscenegraph.org website. 7 * 8 * This library is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * OpenSceneGraph Public License for more details. 12*/ 13 14/* This file is derived from the libb64 project which itself was released to public domain. 15 * For details, see http://sourceforge.net/projects/libb64. Original code by Chris Venter 16 * c++ wrapper for a base64 encoding and decoding algorithm 17*/ 18 19#ifndef OSGDB_CONVERTBASE64_H 20#define OSGDB_CONVERTBASE64_H 1 21 22#include <iostream> 23#include <string> 24#include <vector> 25 26#include <osgDB/Export> 27 28namespace osgDB 29{ 30 const int BUFFERSIZE = 8192; 31 32 typedef enum 33 { 34 step_a, step_b, step_c, step_d 35 } base64_decodestep; 36 37 typedef enum 38 { 39 step_A, step_B, step_C 40 } base64_encodestep; 41 42 typedef struct 43 { 44 base64_encodestep step; 45 char result; 46 int stepcount; 47 } base64_encodestate; 48 49 inline void base64_init_encodestate(base64_encodestate* state_in) 50 { 51 state_in->step = step_A; 52 state_in->result = 0; 53 state_in->stepcount = 0; 54 } 55 56 57 typedef struct 58 { 59 base64_decodestep step; 60 char plainchar; 61 } base64_decodestate; 62 63 inline void base64_init_decodestate(base64_decodestate* state_in) 64 { 65 state_in->step = step_a; 66 state_in->plainchar = 0; 67 } 68 69 class OSGDB_EXPORT Base64encoder 70 { 71 public: 72 Base64encoder(int buffersize_in = BUFFERSIZE): 73 _buffersize(buffersize_in) 74 { 75 base64_init_encodestate(&_state); 76 } 77 78 int encode(char value_in); 79 80 int encode(const char* code_in, const int length_in, char* plaintext_out); 81 82 int encode_end(char* plaintext_out); 83 84 void encode(std::istream& istream_in, std::ostream& ostream_in); 85 86 void encode(const char* chars_in, int length_in, std::string& code_out); 87 88 private: 89 base64_encodestate _state; 90 int _buffersize; 91 }; 92 93 class OSGDB_EXPORT Base64decoder 94 { 95 public: 96 Base64decoder(int buffersize_in = BUFFERSIZE): 97 _buffersize(buffersize_in) 98 { 99 base64_init_decodestate(&_state); 100 } 101 102 int decode(char value_in); 103 104 int decode(const char* code_in, const int length_in, char* plaintext_out); 105 106 void decode(std::istream& istream_in, std::ostream& ostream_in); 107 108 // Decode strings, returns one char* of appropriate size 109 // Note that deallocation of char* is up to the caller of this method 110 char* decode(const std::vector<std::string>& str_in, std::vector<unsigned int>& pos_out); 111 112 private: 113 base64_decodestate _state; 114 int _buffersize; 115 }; 116 117} // namespace osgDB 118 119#endif // BASE64_DECODE_H 120 121