[834] | 1 | // Copyright FreeHEP, 2005. |
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| 2 | #ifndef CHEPREP_DEFLATEOUTPUTSTREAMBUF_H |
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| 3 | #define CHEPREP_DEFLATEOUTPUTSTREAMBUF_H |
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| 4 | |
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| 5 | #include <vector> |
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| 6 | #include <iostream> |
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| 7 | #include <string> |
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| 8 | |
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| 9 | #ifndef CHEPREP_NO_ZLIB |
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| 10 | #include <zlib.h> |
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| 11 | #endif // CHEPREP_NO_ZLIB |
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| 12 | |
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| 13 | /** |
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| 14 | * @author Mark Donszelmann |
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| 15 | * @version $Id: DeflateOutputStreamBuffer.h,v 1.5 2005/06/02 21:28:45 duns Exp $ |
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| 16 | */ |
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| 17 | namespace cheprep { |
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| 18 | |
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| 19 | class DeflateOutputStreamBuffer : public std::streambuf { |
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| 20 | |
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| 21 | public: |
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| 22 | |
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| 23 | DeflateOutputStreamBuffer(std::streambuf *buffer); |
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| 24 | |
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| 25 | void init(bool compress); |
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| 26 | void finish(); |
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| 27 | |
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| 28 | virtual ~DeflateOutputStreamBuffer(); |
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| 29 | |
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| 30 | |
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| 31 | protected: |
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| 32 | int overflow(int c = EOF); |
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| 33 | |
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| 34 | #ifndef CHEPREP_NO_ZLIB |
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| 35 | bool flushOut(); |
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| 36 | #endif // CHEPREP_NO_ZLIB |
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| 37 | |
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| 38 | inline void putUI(unsigned int ui) { |
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| 39 | unsigned char* ucp = reinterpret_cast<unsigned char *>(&ui); |
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| 40 | unsigned int i = (static_cast<unsigned int>(ucp[ 3 ]) << 24) + |
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| 41 | (static_cast<unsigned int>(ucp[ 2 ]) << 16) + |
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| 42 | (static_cast<unsigned int>(ucp[ 1 ]) << 8 ) + |
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| 43 | (static_cast<unsigned int>(ucp[ 0 ])); |
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| 44 | buffer->sputn(reinterpret_cast<char *>(&i), sizeof(unsigned int)); |
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| 45 | } |
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| 46 | |
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| 47 | inline void putUS(unsigned short us) { |
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| 48 | unsigned char* ucp = reinterpret_cast<unsigned char *>(&us); |
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| 49 | unsigned short s = (static_cast<unsigned short>(ucp[ 1 ]) << 8 ) + |
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| 50 | (static_cast<unsigned short>(ucp[ 0 ])); |
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| 51 | buffer->sputn(reinterpret_cast<char *>(&s), sizeof(unsigned short)); |
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| 52 | } |
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| 53 | |
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| 54 | inline void putUB(unsigned char ub) { |
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| 55 | buffer->sputc(ub); |
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| 56 | } |
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| 57 | |
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| 58 | inline void putS(const std::string s) { |
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| 59 | buffer->sputn(s.c_str(), s.length()); |
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| 60 | } |
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| 61 | |
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| 62 | inline std::streampos pos() { |
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| 63 | std::ostream os(buffer); |
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| 64 | return os.tellp(); |
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| 65 | } |
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| 66 | |
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| 67 | inline unsigned int getSize() { |
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| 68 | return size; |
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| 69 | } |
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| 70 | |
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| 71 | inline unsigned int getCRC() { |
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| 72 | return crc; |
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| 73 | } |
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| 74 | |
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| 75 | private: |
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| 76 | static unsigned long crctable[256]; |
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| 77 | std::streambuf *buffer; |
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| 78 | |
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| 79 | unsigned int crc; |
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| 80 | unsigned int size; |
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| 81 | |
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| 82 | #ifndef CHEPREP_NO_ZLIB |
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| 83 | static const unsigned int inSize = 1000; |
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| 84 | static const unsigned int outSize = 1000; |
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| 85 | z_stream zStream; |
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| 86 | bool zStreamOpen; |
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| 87 | |
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| 88 | std::vector<char> in; |
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| 89 | std::vector<char> out; |
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| 90 | #endif // CHEPREP_NO_ZLIB |
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| 91 | }; |
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| 92 | |
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| 93 | |
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| 94 | } // cheprep |
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| 95 | |
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| 96 | |
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| 97 | |
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| 98 | #endif // CHEPREP_DEFLATEOUTPUTSTREAMBUF_H |
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