/* Generates "hashes" from ASCII strings to be used in BUZBEE */

#include <stdint.h>
#include <stdio.h>

const int CCH_CMD = 4;

int mkhash(const char pszCmd[]);

int main(void) {
	/* Add your commands here to be hashed. Imprtant that they all be CCH_CMD
	 * chars long EXCLUDING the NUL terminator. */
	char *ppszCmds[] = {
		"CALL",
		"EXEC",
		"HELP",
		"PEEK",
		"POKE",
		"SREC",
		/* "BOOT", */
	};

	for (int iCmd = 0; iCmd < (sizeof(ppszCmds) / sizeof(char *)); iCmd++)
		printf("BBC%s\n  fcb $%.2X\n", ppszCmds[iCmd], mkhash(ppszCmds[iCmd]));

	return 0;
}

int mkhash(const char pszCmd[]) {
	uint8_t nhash = 0;

	/* NOTE: Very important that condition is the length of the string MINUS the
	 * NUL terminator, in this case iChar < 4 */
	for (int iChar = 0; iChar < CCH_CMD; iChar++)
		nhash = nhash - pszCmd[iChar];

	return nhash;
}