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#include "7z.h"
#include "LZMAEncoder.h"
#include "LZMADecoder.h"
bool compress_lzma_7z(const unsigned char* in_data,
unsigned in_size,
unsigned char* out_data,
unsigned& out_size,
unsigned algo,
unsigned dictionary_size,
unsigned num_fast_bytes) throw () {
try {
NCompress::NLZMA::CEncoder cc;
// reduce the dictionary size if the file is small
while (dictionary_size > 8 && dictionary_size / 2 >= out_size)
dictionary_size /= 2;
if (cc.SetDictionarySize(dictionary_size) != S_OK)
return false;
if (cc.SetEncoderNumFastBytes(num_fast_bytes) != S_OK)
return false;
if (cc.SetEncoderAlgorithm(algo) != S_OK)
return false;
ISequentialInStream in(reinterpret_cast<const char*>(in_data), in_size);
ISequentialOutStream out(reinterpret_cast<char*>(out_data), out_size);
UINT64 in_size_l = in_size;
if (cc.WriteCoderProperties(&out) != S_OK)
return false;
if (cc.Code(&in, &out, &in_size_l) != S_OK)
return false;
out_size = out.size_get();
if (out.overflow_get())
return false;
return true;
} catch (...) {
return false;
}
}
#if 0
bool decompress_lzma_7z(const unsigned char* in_data,
unsigned in_size,
unsigned char* out_data,
unsigned out_size) throw () {
try {
NCompress::NLZMA::CDecoder cc;
ISequentialInStream in(reinterpret_cast<const char*>(in_data), in_size);
ISequentialOutStream out(reinterpret_cast<char*>(out_data), out_size);
UINT64 in_size_l = in_size;
UINT64 out_size_l = out_size;
if (cc.ReadCoderProperties(&in) != S_OK)
return false;
if (cc.Code(&in, &out, &in_size_l, &out_size_l) != S_OK)
return false;
if (out.size_get() != out_size || out.overflow_get())
return false;
return true;
} catch (...) {
return false;
}
}
#endif
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