71 lines
1.3 KiB
C++
71 lines
1.3 KiB
C++
// :mode=c++:
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/*
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decode.h - c++ wrapper for a base64 decoding algorithm
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This is part of the libb64 project, and has been placed in the public domain.
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For details, see http://sourceforge.net/projects/libb64
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*/
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#ifndef BASE64_DECODE_H
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#define BASE64_DECODE_H
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#include <iostream>
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namespace base64
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{
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extern "C"
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{
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#include "cdecode.h"
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}
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struct decoder
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{
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base64_decodestate _state;
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int _buffersize;
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decoder(int buffersize_in = BUFFERSIZE)
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: _buffersize(buffersize_in)
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{}
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int decode(char value_in)
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{
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return base64_decode_value(value_in);
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}
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int decode(const char* code_in, const int length_in, char* plaintext_out)
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{
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return base64_decode_block(code_in, length_in, plaintext_out, &_state);
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}
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void decode(std::istream& istream_in, std::ostream& ostream_in)
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{
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base64_init_decodestate(&_state);
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//
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const int N = _buffersize;
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char* code = new char[N];
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char* plaintext = new char[N];
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int codelength;
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int plainlength;
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do
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{
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istream_in.read((char*)code, N);
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codelength = istream_in.gcount();
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plainlength = decode(code, codelength, plaintext);
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ostream_in.write((const char*)plaintext, plainlength);
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}
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while (istream_in.good() && codelength > 0);
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//
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base64_init_decodestate(&_state);
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delete [] code;
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delete [] plaintext;
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}
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};
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} // namespace base64
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#endif // BASE64_DECODE_H
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