[32] | 1 | // :mode=c++: |
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| 2 | /* |
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| 3 | encode.h - c++ wrapper for a base64 encoding algorithm |
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| 4 | |
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| 5 | This is part of the libb64 project, and has been placed in the public domain. |
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| 6 | For details, see http://sourceforge.net/projects/libb64 |
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| 7 | */ |
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| 8 | #ifndef BASE64_ENCODE_H |
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| 9 | #define BASE64_ENCODE_H |
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| 10 | |
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| 11 | #include <iostream> |
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| 12 | |
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| 13 | #define BUFFERSIZE 5000 |
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| 14 | |
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| 15 | namespace base64 |
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| 16 | { |
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| 17 | extern "C" |
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| 18 | { |
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| 19 | #include "cencode.h" |
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| 20 | } |
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| 21 | |
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| 22 | struct encoder |
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| 23 | { |
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| 24 | base64_encodestate _state; |
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| 25 | int _buffersize; |
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| 26 | |
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| 27 | encoder(int buffersize_in = BUFFERSIZE) |
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| 28 | : _buffersize(buffersize_in) |
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| 29 | {} |
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| 30 | |
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| 31 | int encode(char value_in) |
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| 32 | { |
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| 33 | return base64_encode_value(value_in); |
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| 34 | } |
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| 35 | |
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| 36 | int encode(const char* code_in, const int length_in, char* plaintext_out) |
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| 37 | { |
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| 38 | base64_init_encodestate(&_state); |
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| 39 | return base64_encode_block(code_in, length_in, plaintext_out, &_state); |
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| 40 | } |
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| 41 | |
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| 42 | int encode_end(char* plaintext_out) |
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| 43 | { |
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| 44 | return base64_encode_blockend(plaintext_out, &_state); |
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| 45 | } |
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| 46 | |
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| 47 | void encode(std::istream& istream_in, std::ostream& ostream_in) |
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| 48 | { |
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| 49 | base64_init_encodestate(&_state); |
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| 50 | // |
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| 51 | const int N = _buffersize; |
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| 52 | char* plaintext = new char[N]; |
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| 53 | char* code = new char[2*N]; |
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| 54 | int plainlength; |
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| 55 | int codelength; |
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| 56 | |
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| 57 | do |
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| 58 | { |
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| 59 | istream_in.read(plaintext, N); |
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| 60 | plainlength = istream_in.gcount(); |
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| 61 | // |
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| 62 | codelength = encode(plaintext, plainlength, code); |
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| 63 | ostream_in.write(code, codelength); |
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| 64 | } |
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| 65 | while (istream_in.good() && plainlength > 0); |
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| 66 | |
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| 67 | codelength = encode_end(code); |
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| 68 | ostream_in.write(code, codelength); |
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| 69 | // |
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| 70 | base64_init_encodestate(&_state); |
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| 71 | |
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| 72 | delete [] code; |
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| 73 | delete [] plaintext; |
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| 74 | } |
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| 75 | }; |
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| 76 | |
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| 77 | } // namespace base64 |
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| 78 | |
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| 79 | #endif // BASE64_ENCODE_H |
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| 80 | |
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