int main()
{
FileSystem fileSystem;
int errCode;
//Format filesystem
errCode = fileSystem.formatDisk();
if(errCode == 1)
cout<<"Filesystem formatting failed"<<endl;
//Create a file and open it
int file1 = fileSystem.create();
int fileid1 = fileSystem.open(file1);
//This is the data we'll write
byte buffer[] = "Implementing File Systems, a test program";
//Seek to a large distance so that we actually cause an indirection. As usual, we skip the first 10 blocks, and then write
//Note that 256 is the block size. So, we seek to skip the first 10 direct blocks and then 10 bytes
fileSystem.seek(fileid1, 10*256 + 10, SEEK_CUR);
//Write 20 bytes at that position
//If you could not write 20 bytes, that is definitely an error
if(fileSystem.write(fileid1, buffer, 20) != 20)
cerr<<"Error!"<<endl;
//Close the file
fileSystem.close(fileid1);
//Reopen
fileid1 = fileSystem.open(file1);
/* Read from file currently does not work. So, commenting out */
/*
byte readbuf[16] = "\0";
fileSystem.read(fileid1, readbuf, 6);
cout<<"Read"<<readbuf<<"done" <<endl;
*/
//Owing to the non-functionality of read(), del() cannot be tested
//fileSystem.del(fileid1);
//By our write, we can calculate that the data block is 22
//free() would free that block and add it to the free list
//free() is a private function, however to show that it works, all you have to do is modify the FileSystem.h file and uncomment the following statement
//fileSystem.free(22);
//Also note that inumber() works. It is trivial to verify this
//Only read() and del() do not work.
return 0;
}
