/**************************************
 * RUN LENGTH DECODER FOR ASCII TEXT  *        
 * Code Copyright 2000                *
 * Jonathan Sapan '03                 *
 * (unless noted otherwise)           *
 **************************************/
 
 

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

FILE *inputFile;
FILE *outputFile;

main(int argc, char *argv[])
{	
	int j;
	char a, b, i;
	char sentinel;
	
	inputFile  = fopen(argv[1], "rb");
	outputFile = fopen(argv[2], "w");
	
/*--------------------------------------------------------------------*/	
	if ( argc != 3 ) /*Check to see if program was called properly*/
	{
		fprintf(stdout, "TOO FEW ARGUMENTS\n" );
		exit(EXIT_SUCCESS);
	}
/*--------------------------------------------------------------------*/


/*--------------------------------------------------------------------*/	
	if ( (inputFile == NULL) || (outputFile == NULL) )
	{
		fprintf(stdout, "INVALID FILE SPECIFIED\n");
		exit(EXIT_SUCCESS);
	}
/*--------------------------------------------------------------------*/


	fread( &sentinel, 1, 1, inputFile );
	
	while(1)
	{
		if ( fread( &a, 1, 1, inputFile) == 0 )
			break;
			
 		if ( a == sentinel )
		{
			fread( &b, 1, 1, inputFile);
			fread( &i, 1, 1, inputFile );
			
			for ( j = 0; j < i + 4; j++ )
				fprintf(outputFile, "%c", b );
			
		}
		
		else
			fprintf(outputFile, "%c", a );
			
	}
	
	fclose(inputFile);
	fclose(outputFile);
	
	return 0;	
}