/* --------
"dtvkernalpatch"
Kernal patcher for Hummer DTV game
By Doug Garmon, (c) 2006
GPL Licence
-----------*/

#include <stdio.h>

int main(int argc, char *argv[]) {
int count = 0;
int i, addr, cmp1, cmp2;
FILE *kernalin, *out, *patchin;
unsigned char *storage;

if (argc == 4)
{
	if (storage = (unsigned char *)malloc(8192))
	{
		if (kernalin = fopen(argv[1], "r"))
		{
			while ((i = fgetc(kernalin))!=EOF) {

			storage[count] = (unsigned char)i;
			count++;
			}

			if (count == 8192)
				printf("Kernal size OK: %d\n", count);
			else
				printf("Kernal size NOT OK: %d  Continuing anyway...\n", count);

			if (patchin = fopen(argv[2], "r"))
			{
				do {
					fscanf(patchin, "%d %d %d", &addr, &cmp1, &cmp2);
					if (addr < 8192)
						storage[addr] = (unsigned char)cmp2;
				} while (!feof(patchin));

				if (out = fopen(argv[3], "w"))
				{
					for (i=0; i<8192; i++)
					{
						fputc((unsigned char)storage[i], out);
					}
				}
				else printf("Error: File 3 open failure\n");
			}
			else printf("Error: File 2 open failure\n");
		}
		else printf("Error: File 1 open failure\n");
	free(storage);
	}
	else printf("Error: Couldn't allocate memory\n");
}
else printf("Error: Wrong number of arguments %d\nInput: 'dtvkpatch kernalorig patchfile newkernal'\n", argc);

return(0);
}