ZlibCompressor.cpp
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00001 #include "ZlibCompressor.h" 00002 00003 ACE_RCSID (ZLIB, 00004 ZlibCompressor, 00005 "$Id: ZlibCompressor.cpp 84846 2009-03-16 18:37:44Z msmit $") 00006 00007 #include "zlib.h" 00008 00009 TAO_BEGIN_VERSIONED_NAMESPACE_DECL 00010 00011 namespace TAO 00012 { 00013 ZlibCompressor::ZlibCompressor ( 00014 ::Compression::CompressionLevel compression_level, 00015 ::Compression::CompressorFactory_ptr compressor_factory) : 00016 BaseCompressor (compression_level, compressor_factory) 00017 { 00018 } 00019 00020 void 00021 ZlibCompressor::compress ( 00022 const ::Compression::Buffer & source, 00023 ::Compression::Buffer & target 00024 ) 00025 { 00026 uLongf max_length = 00027 static_cast <uLongf> (source.length () * 1.001) + 12; 00028 target.length (static_cast <CORBA::ULong> (max_length)); 00029 00030 int const retval = ::compress2 (reinterpret_cast <Bytef*>(target.get_buffer ()), 00031 &max_length, 00032 reinterpret_cast <const Bytef*>(source.get_buffer ()), 00033 source.length (), 00034 this->compression_level ()); 00035 00036 if (retval != Z_OK) 00037 { 00038 throw ::Compression::CompressionException (retval, ::zError (retval)); 00039 } 00040 else 00041 { 00042 target.length (static_cast <CORBA::ULong> (max_length)); 00043 } 00044 00045 // Update statistics for this compressor 00046 this->update_stats (source.length (), target.length ()); 00047 } 00048 00049 void 00050 ZlibCompressor::decompress ( 00051 const ::Compression::Buffer & source, 00052 ::Compression::Buffer & target) 00053 { 00054 uLongf max_length = static_cast <uLongf> (target.length ()); 00055 int const retval = uncompress (reinterpret_cast <Bytef*>(target.get_buffer ()), 00056 &max_length, 00057 reinterpret_cast <const Bytef*>(source.get_buffer ()), 00058 source.length ()); 00059 00060 if (retval != Z_OK) 00061 { 00062 throw ::Compression::CompressionException (retval, ""); 00063 } 00064 else 00065 { 00066 target.length (static_cast <CORBA::ULong> (max_length)); 00067 } 00068 } 00069 } 00070 00071 TAO_END_VERSIONED_NAMESPACE_DECL
