Utils.py

import sys

addressingModeNames = ["INDIRECT_Y_ENCODING", "INDIRECT_X_ENCODING", "ABSOLUTE_Y_ENCODING", "ABSOLUTE_X_ENCODING",
					   "ABSOLUTE_ENCODING", "ZEROPAGE_X_ENCODING", "ZEROPAGE_ENCODING", "IMMEDIATE_ENCODING", 
					   "RELATIVE_ENCODING", "ACCUMULATOR_ENCODING", "INDIRECT_ENCODING", "ZEROPAGE_Y_ENCODING" ]



def writeDataToFile(data, outputFileName):
	f = open(outputFileName, "wb")
	f.write(data)

def exitWithError(fmt, *error):
	print(fmt % error)
	sys.exit()

def addressingModeString(addressingMode):
	if addressingMode == 0:
		return "IMPLIED_ENCODING"

	return addressingModeNames[addressingModeIndex(addressingMode) - 1]

# expects a string number with the format $<hex number>. examples: $FF, $80, $C87F
def numForString(numStr, enforceType):

	# must be explicit about number
	if (numStr[0] == '$' or enforceType == "hex") and enforceType != "binary":
		try:
			value = int(numStr[1::], 16)
			return (True, value)
		except ValueError as verr:
			return (False, 0)
	elif numStr[0] == '%' or enforceType == "binary":
		try:
			value = int(numStr[1::], 2)
			return (True, value)
		except ValueError as verr:
			return (False, 0)
	else:
		try:
			value = int(numStr, 10)
			return (True, value)
		except ValueError as verr:
			return (False, 0)