Block compression

[Ofer Samocha]

I have a question.   I'm trying to compress and uncompress messages using the same Hoffman table. the compress looks fine but the uncompress fails.   I'm using version 5.2.1. please advise, Ofer   #include "stdafx.h" #include <fstream> #include <crypto/gzip.h>   int main(int argc, char* argv[]) {   unsigned char chunk[65536];   unsigned char compressedBuffer[128000];   unsigned char decompressedBuffer[65536];   size_t decompressedSize;   CryptoPP::Gzip compressor;   CryptoPP::Gunzip decompressor;   int pos = 0;     FILE* in  = fopen("c:\\temp\\in", "rb");   while(!feof(in))   {     // Comp     size_t compressedSize;     size_t readBytes = fread(chunk, 1, 65536, in);       printf("Compressing %d - %d\n", pos, pos+readBytes);     pos += readBytes;       compressedSize = readBytes;       compressor.PutMessageEnd(chunk, (unsigned int)readBytes);     compressedSize = compressor.MaxRetrievable();     compressor.Get(compressedBuffer,(unsigned int)compressedSize);     compressor.GetNextMessage();       printf("\t compressed size: %d\n", compressedSize);       // Decomp     decompressor.PutMessageEnd(compressedBuffer, (unsigned int)compressedSize);     decompressedSize = decompressor.MaxRetrievable();     decompressor.Get(decompressedBuffer,(unsigned int)decompressedSize);     decompressor.GetNextMessage();       printf("\t decompressed size: %d\n", decompressedSize);       assert(decompressedSize == readBytes);     assert(memcmp(chunk, decompressedBuffer, readBytes) == 0);   }   fclose(in);   return 0; }   Output:   Compressing 0 - 65536          compressed size: 3352          decompressed size: 65536 Compressing 65536 - 131072          compressed size: 3334          decompressed size: 0 Assertion failed: decompressedSize == readBytes