#!/usr/bin/env python

import re
import sys

regfile = sys.argv[1]

f = open(regfile, "r")

regexp = re.compile("#define[\s]+([0-9A-Z_]+)[\s]+0x([0-9a-fA-F]{4})")

regs = {}

for line in f.readlines():
	m = regexp.match(line)
	if m:
		name, reg = m.groups()
		regs[int(reg, 16)] = name

parser = """\
#!/usr/bin/env python
# This was magically created by gen_parser.py using %s for registers

import sys

regs = {
""" % regfile

keys = regs.keys()
keys.sort()

longestreg = 0

for key in keys:
	parser += "%s: \"%s\",\n" % (key, regs[key])
	if len(regs[key]) > longestreg:
		longestreg = len(regs[key])

parser += """\
}

def itostr(index):
	try:
		return regs[index]
	except KeyError:
		return "0x%%4x" %% index

f = open(sys.argv[1], "r")

line = f.readline()
while line:
	data = int(line,16)
	ptype = data >> 30

	if ptype == 0:
		# cmdpacket0
		index = (data & 0x1FFF) << 2
		count = ((data >> 16) & 0xFFFF) + 1
		print "cmdpacket0, index %%s, count %%d" %% (itostr(index), count)
		while count:
			count -= 1
			value = int(f.readline(), 16)
			print "%%%ds <- 0x%%08x" %% (itostr(index), value)
			if not (data & (1 << 15)):
				index += 0x4
		print ""

	elif ptype == 2:
		# cmdpacket2
		print "cmdpacket2"

	line = f.readline()
""" % longestreg

print parser