Compress zlib

Ezlib.lib
Estlib.lib

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

 {
 int err;
 z_stream c_stream; /* compression stream */
 Byte * compr;
 uLong comprLen = 20*sizeof(int);
 compr    = (Byte*)calloc((uInt)comprLen, 1);
 const char hello[] = "hello, hello!";
 uLong len = (uLong)strlen(hello)+1;
 c_stream.zalloc = (alloc_func)0;
 c_stream.zfree = (free_func)0;
 c_stream.opaque = (voidpf)0;
 err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION);
 c_stream.next_in  = (Bytef*)hello;
 c_stream.next_out = compr;
 while (c_stream.total_in != len && c_stream.total_out < comprLen)
  {
  c_stream.avail_in = c_stream.avail_out = 1; /* force small buffers */
  err = deflate(&c_stream, Z_NO_FLUSH);
  }    /* Finish the stream, still forcing small buffers: */
  deflateEnd(&c_stream);
  free(compr);
 }