// Sample demo for QuickLZ 1.5.x

// Remember to define QLZ_COMPRESSION_LEVEL to the same value for the compressor and decompressor

#include <stdio.h>
#include <stdlib.h>

#include "quicklz.h"

#if QLZ_STREAMING_BUFFER == 0
    #error Define QLZ_STREAMING_BUFFER to a non-zero value for this demo
#endif

int main(int argc, char* argv[])
{
    FILE *ifile, *ofile;
    char *file_data, *decompressed;
    size_t d, c;
    qlz_state_decompress *state_decompress = (qlz_state_decompress *)malloc(sizeof(qlz_state_decompress));

    // read source file
    ifile = fopen(argv[1], "rb");
    ofile = fopen(argv[2], "wb");

    // a compressed packet can be at most "uncompressed size" + 400 bytes large where
    // "uncompressed size" = 10000 in worst case in this sample demo
    file_data = (char*) malloc(10000 + 400);

    // allocate decompression buffer
    decompressed = (char*) malloc(10000);

    // allocate and initially zero out the scratch buffer. After this, make sure it is
    // preserved across calls and never modified manually
	memset(state_decompress, 0, sizeof(qlz_state_decompress)); 


    // read 9-byte header to find the size of the entire compressed packet, and 
    // then read remaining packet
    while((c = fread(file_data, 1, 9, ifile)) != 0)
    {
        c = qlz_size_compressed(file_data);
        fread(file_data + 9, 1, c - 9, ifile);
        d = qlz_decompress(file_data, decompressed, state_decompress);
        printf("%u bytes decompressed into %u.\n", (unsigned int)c, (unsigned int)d);
        fwrite(decompressed, d, 1, ofile);
    }
    fclose(ifile);
    fclose(ofile);
    return 0;
}