Posted by: login November 18, 2004
Login in to Rate this Post:
0 
? 
?
And the Main program!!
int main(void)
{
unsigned char ch ;
int i = 0 ,n ;
char input[10], infile_name[1024], outfile_name[1024], choice ;
printf("\n*************LZ77 MENU*************\n") ;
printf("-----------------------------------") ;
printf("\nc - Compress File") ;
printf("\nd - Decompress File") ;
printf("\n-----------------------------------\n") ;
printf("\nEnter Choice -> ") ;
fgets(input, sizeof(input), stdin) ;
while(input[0] != 'c' && input[0] != 'C' &&
input[0] != 'd' && input[0] != 'D')
{
printf("\nEnter Choice -> ") ;
fgets(input, sizeof(input), stdin) ;
}
choice = input[0] ;
p_start = (unsigned char *)calloc(2 * SW_SIZE + LA_SIZE, sizeof(unsigned char)) ; /* allocates
memory for
2*SW*LA */
if(p_start == NULL)
{
printf("\n***CALLOC FAILED***\n") ;
exit(0) ;
}
p_la = p_la_start = p_start + SW_SIZE ;
p_sw = p_start ;
p_flag = p_la + SW_SIZE ;
switch(choice)
{
case 'c': case 'C':
printf("\nEnter file to compress -> ") ;
gets(infile_name) ;
while(infile_name[0] == NULL)
{
printf("\nEnter file to compress -> ") ;
gets(infile_name) ;
}
f_input = fopen(infile_name,"rb+") ; /* opens the file if it exists */
if(f_input == NULL)
{
printf("\n***FILE NOT FOUND***\n") ;
exit(0) ;
}
printf("\nEnter file to compress to -> ") ;
gets(outfile_name) ;
while(outfile_name[0] == NULL)
{
printf("\nEnter file to compress to -> ") ;
gets(outfile_name) ;
}
f_output = fopen(outfile_name,"wb+") ;
if(f_output == NULL)
{
printf("\n***ERROR CREATING OUTPUT FILE FOR COMPRESSION***\n") ;
exit(0) ;
}