/****************************************************************************
* Function : main
* Description: This is the main function for this program, it validates
* the command line input and, if valid, it will either
* encode a file using the LZSS algorithm or decode a
* file encoded with the LZSS algorithm.
* Parameters : argc - number of parameters
* argv - parameter list
* Effects : Encodes/Decodes input file
* Returned : EXIT_SUCCESS for success, otherwise EXIT_FAILURE.
****************************************************************************/
int main(int argc, char *argv[])
{
option_t *optList, *thisOpt;
FILE *fpIn, *fpOut; /* pointer to open input & output files */
MODES mode;
char input[] = "Chan";
int input_len = strlen(input);
char *output = (char *)malloc(sizeof(char) * (input_len + 1));
/* initialize data */
fpIn = NULL;
fpOut = NULL;
mode = ENCODE;
/* parse command line */
optList = GetOptList(argc, argv, "c:h?");
thisOpt = optList;
while (thisOpt != NULL)
{
switch(thisOpt->option)
{
case 'c': /* compression mode */
mode = ENCODE;
break;
case 'h':
case '?':
printf("options:\n");
printf(" -c : Encode input file to output file.\n");
printf(" -d : Decode input file to output file.\n");
printf(" -i <filename> : Name of input file.\n");
printf(" -o <filename> : Name of output file.\n");
printf(" -h | ? : Print out command line options.\n\n");
FreeOptList(optList);
return(EXIT_SUCCESS);
}
optList = thisOpt->next;
free(thisOpt);
thisOpt = optList;
}
/* we have valid parameters encode or decode */
if (mode == ENCODE)
{
printf("Before encoding\n");
EncodeLZSSByArray(input, output);
}
return EXIT_SUCCESS;
}
/****************************************************************************
* Function : main
* Description: This is the main function for this program, it validates
* the command line input and, if valid, it will either
* encode a file using the LZSS algorithm or decode a
* file encoded with the LZSS algorithm.
* Parameters : argc - number of parameters
* argv - parameter list
* Effects : Encodes/Decodes input file
* Returned : EXIT_SUCCESS for success, otherwise EXIT_FAILURE.
****************************************************************************/
int main(int argc, char *argv[])
{
option_t *optList, *thisOpt;
FILE *fpIn, *fpOut; /* pointer to open input & output files */
MODES mode;
/* initialize data */
fpIn = NULL;
fpOut = NULL;
mode = ENCODE;
/* parse command line */
optList = GetOptList(argc, argv, "cdi:o:h?");
thisOpt = optList;
while (thisOpt != NULL)
{
switch(thisOpt->option)
{
case 'c': /* compression mode */
mode = ENCODE;
break;
case 'd': /* decompression mode */
mode = DECODE;
break;
case 'i': /* input file name */
if (fpIn != NULL)
{
fprintf(stderr, "Multiple input files not allowed.\n");
fclose(fpIn);
if (fpOut != NULL)
{
fclose(fpOut);
}
FreeOptList(optList);
exit(EXIT_FAILURE);
}
/* open input file as binary */
fpIn = fopen(thisOpt->argument, "rb");
if (fpIn == NULL)
{
perror("Opening input file");
if (fpOut != NULL)
{
fclose(fpOut);
}
FreeOptList(optList);
exit(EXIT_FAILURE);
}
break;
case 'o': /* output file name */
if (fpOut != NULL)
{
fprintf(stderr, "Multiple output files not allowed.\n");
fclose(fpOut);
if (fpIn != NULL)
{
fclose(fpIn);
}
FreeOptList(optList);
exit(EXIT_FAILURE);
}
/* open output file as binary */
fpOut = fopen(thisOpt->argument, "wb");
if (fpOut == NULL)
{
perror("Opening output file");
if (fpIn != NULL)
{
fclose(fpIn);
}
FreeOptList(optList);
exit(EXIT_FAILURE);
}
break;
case 'h':
case '?':
printf("Usage: %s <options>\n\n", RemovePath(argv[0]));
printf("options:\n");
printf(" -c : Encode input file to output file.\n");
printf(" -d : Decode input file to output file.\n");
printf(" -i <filename> : Name of input file.\n");
printf(" -o <filename> : Name of output file.\n");
printf(" -h | ? : Print out command line options.\n\n");
printf("Default: %s -c -i stdin -o stdout\n",
RemovePath(argv[0]));
FreeOptList(optList);
return(EXIT_SUCCESS);
}
optList = thisOpt->next;
free(thisOpt);
thisOpt = optList;
}
/* use stdin/out if no files are provided */
if (fpIn == NULL)
{
fpIn = stdin;
}
if (fpOut == NULL)
{
fpOut = stdout;
}
/* we have valid parameters encode or decode */
if (mode == ENCODE)
{
EncodeLZSSByFile(fpIn, fpOut);
}
else
{
DecodeLZSSByFile(fpIn, fpOut);
}
/* remember to close files */
fclose(fpIn);
fclose(fpOut);
return EXIT_SUCCESS;
}
