gzip deflate

gistfile1.txt

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <zlib.h>

#define BFSIZE (32 * 1024)

int main(int argc, char *argv[]) {
  if (argc != 2) {
      fprintf(stderr, "Usage : %s filename\n", argv[0]);
      exit(1);
    }

    const char* file = argv[1];

    FILE *src = fopen(file, "rb");
    FILE *raw = fopen("out", "wb");
    //FILE *dst = fopen(out, "rb");

    unsigned char bf[BFSIZE];
    unsigned char compressed[BFSIZE];

    unsigned int n ;
    unsigned long m;

    while ( n = fread (bf, 1, BFSIZE, src) ) {
        m = BFSIZE;
            fwrite(bf, 1, n , raw);

        int result = uncompress(compressed, &m, bf, n);

        if (result != Z_OK) {
            fprintf(stderr, "err: %d\n", result);

        } else {
            fprintf(stderr, "m: %d\n", m);
            fwrite(compressed, 1, m , stdout);
        }

        //fwrite(bf, 1, n , stdout);
    }


fclose(raw);

  return 0;
}