# *******************************************************************************************

# *******************************************************************************************

#

#		File:		extract.py

#		Date:		3rd September 2019

#		Purpose:	Extract opcode descriptions from tables.h.org

#		Author:		Paul Robson ([email protected])

#

# *******************************************************************************************

# *******************************************************************************************

import re

#

#							Get one element from one table.

#

def extract(opc,n):

	line = opc[n >> 4]

	m = re.match("^\\/\\*\\s+[0-9A-Fa-f]\\s+\\*\\/(.*)\\s*\\/\\*\\s*[0-9A-Fa-f]\\s*\\*\\/$",line)

	assert m is not None,line

	return m.group(1).replace(" ","").split(",")[n % 16]

#

#						Convert a tables.h type file to a list of opcodes

#

def convert(src,tgt):

	src = [x.strip() for x in open(src).readlines()]

	#

	#		Pull out data.

	#

	eac = src[3:3+16]

	opcodes = src[23:23+16]

	cycles = src[43:43+16]

	h = open(tgt,"w")

	for n in range(0,256):

		action = extract(opcodes,n)

		if action != "nop":

			amode = extract(eac,n)

			icycles = extract(cycles,n)

			h.write("{1:3} {2:4} {3} ${0:02x}\n".format(n,action,amode,icycles))

	h.close()

#

#		Stop it being overwritten accidentally. Should be no reason to regenerate 6502.opcodes

#		The pair is so you can compare the two sets of opcodes. (dis-include the 65c02.opcodes

#		extensions first.)

#

#convert("tables.h.org","6502.opcodes")

#convert("tables.h","/tmp/6502.opcodes")