Lzw.cpp

#include <time.h>

#include "lzw.h"



/********************************************************************

**

** This program gets a file name from the command line.  It compresses the

** file, placing its output in a file named test.lzw.  It then expands

** test.lzw into test.out.  Test.out should then be an exact duplicate of

** the input file.

**

*************************************************************************/



main(int argc, char *argv[])

{

clock_t timer;

CLZWCompressFile lzw;



/*

** Get the file name, open it up, and open up the lzw output file.

*/

  if (argc==1)

  {

    printf("Input file name to compress?\n");

	 return 0;

  }



  printf("testing %s...\n", argv[1]);

/*

** Compress the file.

*/

  timer = clock();

  int crunch = lzw.Compress(argv[1], "test.lzw");

  timer = clock() - timer; //CLOCKS_PER_SEC

  printf("compress time=%d ms, encoding=%d, size=%u", timer, lzw.get_bits(), crunch);

  int filesize = lzw.u_io;

  printf(" (ratio=%d%%)\n", filesize ? (filesize-crunch)*100/filesize : 0);

  if(lzw.AnyIOErrors())

	  printf("***I/O ERROR***\n");



/*

** Expand the file.

*/

   timer = clock();

  int orig = lzw.Expand("test.lzw", "test.out");

  timer = clock() - timer; //CLOCKS_PER_SEC

  printf("expand time=%d ms, encoding=%d\n", timer, lzw.get_bits());

	if(lzw.AnyIOErrors())

	  printf("***I/O ERROR***\n");



  ATLASSERT(filesize == orig); // did we mangle the file?

  return 0;

}