Created
May 26, 2016 11:08
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Simple LZ4 example
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#include "lz4.h" | |
using namespace std; | |
int main() | |
{ | |
char szSource[] = "2013-01-07 00:00:04,0.98644,0.98676 2013-01-07 00:01:19,0.98654,0.98676 2013-01-07 00:01:38,0.98644,0.98696"; | |
int nInputSize = sizeof(szSource); | |
// compress szSource into pchCompressed | |
char* pchCompressed = new char[nInputSize]; | |
int nCompressedSize = LZ4_compress((const char *)(&szSource), pchCompressed, nInputSize); | |
// write pachCompressed to binary lz4.dat | |
ofstream outBinaryFile("lz4.dat",ofstream::binary); | |
outBinaryFile.write(pchCompressed, nCompressedSize); | |
outBinaryFile.close(); | |
delete[] pchCompressed; | |
pchCompressed = 0; | |
//read compressed binary file (assume we pass/encode nInputSize but don't know nCompressedSize) | |
ifstream infCompressedBinaryFile( "lz4.dat", ifstream::binary ); | |
//Get compressed file size for buffer | |
infCompressedBinaryFile.seekg (0,infCompressedBinaryFile.end); | |
int nCompressedInputSize = infCompressedBinaryFile.tellg(); | |
infCompressedBinaryFile.clear(); | |
infCompressedBinaryFile.seekg(0,ios::beg); | |
//Read file into buffer | |
char* pchCompressedInput = new char[nCompressedInputSize]; | |
infCompressedBinaryFile.read(pchCompressedInput,nCompressedSize); | |
infCompressedBinaryFile.close(); | |
// Decompress buffer | |
char* pchDeCompressed = new char[nInputSize]; //(nCompressedInputSize *2) +8 | |
LZ4_uncompress(pchCompressedInput, pchDeCompressed, nInputSize); | |
delete[] pchCompressedInput; | |
pchCompressedInput = 0; | |
// write decompressed pachUnCompressed to | |
ofstream outFile("lz4.txt"); | |
outFile.write(pchDeCompressed, nInputSize); | |
outFile.close(); | |
delete[] pchDeCompressed; | |
pchDeCompressed = 0; | |
return 0; | |
} |
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