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 | #include <cstdio> |
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9 | |
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10 | #ifndef CHEPREP_NO_ZLIB |
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11 | #include <zlib.h> |
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12 | #endif // CHEPREP_NO_ZLIB |
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13 | |
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14 | /** |
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15 | * @author Mark Donszelmann |
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16 | * @version $Id: DeflateOutputStreamBuffer.h,v 1.6 2009/05/08 09:26:58 gcosmo Exp $ |
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17 | */ |
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18 | namespace cheprep { |
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19 | |
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20 | class DeflateOutputStreamBuffer : public std::streambuf { |
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21 | |
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22 | public: |
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23 | |
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24 | DeflateOutputStreamBuffer(std::streambuf *buffer); |
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25 | |
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26 | void init(bool compress); |
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27 | void finish(); |
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28 | |
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29 | virtual ~DeflateOutputStreamBuffer(); |
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30 | |
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31 | |
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32 | protected: |
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33 | int overflow(int c = EOF); |
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34 | |
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35 | #ifndef CHEPREP_NO_ZLIB |
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36 | bool flushOut(); |
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37 | #endif // CHEPREP_NO_ZLIB |
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38 | |
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39 | inline void putUI(unsigned int ui) { |
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40 | unsigned char* ucp = reinterpret_cast<unsigned char *>(&ui); |
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41 | unsigned int i = (static_cast<unsigned int>(ucp[ 3 ]) << 24) + |
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42 | (static_cast<unsigned int>(ucp[ 2 ]) << 16) + |
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43 | (static_cast<unsigned int>(ucp[ 1 ]) << 8 ) + |
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44 | (static_cast<unsigned int>(ucp[ 0 ])); |
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45 | buffer->sputn(reinterpret_cast<char *>(&i), sizeof(unsigned int)); |
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46 | } |
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47 | |
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48 | inline void putUS(unsigned short us) { |
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49 | unsigned char* ucp = reinterpret_cast<unsigned char *>(&us); |
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50 | unsigned short s = (static_cast<unsigned short>(ucp[ 1 ]) << 8 ) + |
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51 | (static_cast<unsigned short>(ucp[ 0 ])); |
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52 | buffer->sputn(reinterpret_cast<char *>(&s), sizeof(unsigned short)); |
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53 | } |
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54 | |
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55 | inline void putUB(unsigned char ub) { |
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56 | buffer->sputc(ub); |
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57 | } |
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58 | |
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59 | inline void putS(const std::string s) { |
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60 | buffer->sputn(s.c_str(), s.length()); |
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61 | } |
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62 | |
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63 | inline std::streampos pos() { |
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64 | std::ostream os(buffer); |
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65 | return os.tellp(); |
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66 | } |
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67 | |
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68 | inline unsigned int getSize() { |
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69 | return size; |
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70 | } |
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71 | |
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72 | inline unsigned int getCRC() { |
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73 | return crc; |
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74 | } |
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75 | |
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76 | private: |
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77 | static unsigned long crctable[256]; |
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78 | std::streambuf *buffer; |
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79 | |
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80 | unsigned int crc; |
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81 | unsigned int size; |
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82 | |
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83 | #ifndef CHEPREP_NO_ZLIB |
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84 | static const unsigned int inSize = 1000; |
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85 | static const unsigned int outSize = 1000; |
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86 | z_stream zStream; |
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87 | bool zStreamOpen; |
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88 | |
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89 | std::vector<char> in; |
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90 | std::vector<char> out; |
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91 | #endif // CHEPREP_NO_ZLIB |
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92 | }; |
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93 | |
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94 | |
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95 | } // cheprep |
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96 | |
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97 | |
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98 | |
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99 | #endif // CHEPREP_DEFLATEOUTPUTSTREAMBUF_H |
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