// for mixer, emptys file
int clobber(FileSys& filesystem, string file)
{
	// int Firstblock(String s), 0 if no blocks, -1 if s doesnt exist, else first block of s
	// int Nextblock(String s, int i) 0 if i is last block of s, -1 if i doesnt belong to s, else next block after i in s
	// void? Delblock(String s, int i) removes i from s

	int firstBlock = Firstblock(file);
	int returnValue = 1;
	if(firstBlock != 0) // if the file isnt empty already
	{
		int blockNumber = firstBlock;

		bool moreBlocks = true;
		while(moreBlocks)
		{
			int nextBlock = Nextblock(file, blockNumber);
			if(Delblock(file, blockNumber) == 0)
			{
				// ERROR
				moreBlocks = false;
				returnValue = 0;
			}
			
			if(nextBlock == 0 || nextBlock == -1)
			{
				moreBlocks = false;
			}
			else
			{
				blockNumber = nextBlock;
			}
		}
	}

	return returnValue; // not mentioned
}