gambatte: migrate to Python 3

Convert the solitary Python file with 2to3 and add a few more tweaks so it
works under Python 3.

This removes Python 2 as a dep from one more port.

ok bentley@ (MAINTAINER)

emulators/gambatte/Makefile

@@ -4,7 +4,7 @@ REV =			571
 V =			0.5.0.${REV}
 DISTNAME =		gambatte_src-r${REV}
 PKGNAME =		gambatte-$V
-REVISION =		9
+REVISION =		10
 
 CATEGORIES =		emulators
 
@@ -24,7 +24,7 @@ CXXFLAGS_base-clang =	-std=c++14
 SITES =			${SITE_SOURCEFORGE:=gambatte/}
 
 MODULES =		lang/python
-MODPY_VERSION =		${MODPY_DEFAULT_VERSION_2}
+
 MODPY_BUILDDEP =	No
 MODPY_RUNDEP =		No
 MODPY_TESTDEP =		Yes

emulators/gambatte/patches/patch-test_qdgbas_py

@@ -0,0 +1,86 @@
+Adapt for Python 3.
+
+Index: test/qdgbas.py
+--- test/qdgbas.py.orig
++++ test/qdgbas.py
+@@ -8,11 +8,11 @@ class InputError(RuntimeError): pass
+ Op = collections.namedtuple('Op', ['string', 'code', 'size', 'assemble'])
+ 
+ def mkrestr(s):
+-	return re.sub(r'\s+', r'\s*', re.sub(r'([,)(+])', r' \\\1 ', s))
++	return re.sub(r'\s+', r'\\s*', re.sub(r'([,)(+])', r' \\\1 ', s))
+ 
+ imm8  = r'[0-9a-fA-F][0-9a-fA-F]'
+ imm16 = imm8 + imm8
+-labelregexp = re.compile('\w+\s+(\w+)')
++labelregexp = re.compile(r'\w+\s+(\w+)')
+ 
+ def assembleNormal(outdata, outpos, indata, inpos, targets, op):
+ 	pass
+@@ -140,7 +140,7 @@ def makeoplist():
+ 	addop('ei', 0xfb)
+ 	addop('cmp a, imm8', 0xfe)
+ 	addop('srl a', 0xcb3f)
+-	addop('\w* : ', -1)
++	addop(r'\w* : ', -1)
+ 	
+ 	return l
+ 
+@@ -154,7 +154,7 @@ oplist = makeoplist()
+ opregexp = makeopregexp(oplist)
+ 
+ def maptargets(targets, indata, instart, addr):
+-	for i in xrange(instart, len(indata)):
++	for i in range(instart, len(indata)):
+ 		match = opregexp.match(indata[i])
+ 		if match == None:
+ 			break
+@@ -162,14 +162,14 @@ def maptargets(targets, indata, instart, addr):
+ 		op = oplist[match.lastindex - 1]
+ 		
+ 		if op.size == 0:
+-			targets[re.match('(\w*)\s*:', indata[i]).group(1)] = addr
++			targets[re.match(r'(\w*)\s*:', indata[i]).group(1)] = addr
+ 			
+ 		addr += op.size
+ 	
+ 	return i
+ 
+ def astext(outdata, addr, indata, instart, targets):
+-	for i in xrange(instart, len(indata)):
++	for i in range(instart, len(indata)):
+ 		match = opregexp.match(indata[i])
+ 		if match == None:
+ 			break
+@@ -193,7 +193,7 @@ def astext(outdata, addr, indata, instart, targets):
+ 
+ def asdata(outdata, addr, indata, instart):
+ 	try:
+-		for i in xrange(instart, len(indata)):
++		for i in range(instart, len(indata)):
+ 			ints = [int(x, 0x10) for x in indata[i].split()]
+ 			outdata[addr:addr+len(ints)] = ints
+ 			addr += len(ints)
+@@ -222,7 +222,7 @@ def assembleFile(indata):
+ 	size = 0x8000
+ 	startpos = 0
+ 
+-	for i in xrange(0, len(indata)):
++	for i in range(0, len(indata)):
+ 		spl = indata[i].split()
+ 		if len(spl) > 0 and spl[0] == '.size':
+ 			size = int(spl[1], 0x10)
+@@ -276,11 +276,11 @@ def outFilenameFromInFilename(inname, h143):
+ 
+ def main():
+ 	for arg in sys.argv[1:]:
+-		print 'processing ' + arg
++		print('processing ' + arg)
+ 		outdata = assembleFile(readDataFromFile(arg))
+ 		writeDataToFile(outFilenameFromInFilename(arg, outdata[0x143]), outdata)
+ 	
+-	print "\nassembled " + str(len(sys.argv) - 1) + (' files' if len(sys.argv) != 2 else ' file')
++	print("\nassembled " + str(len(sys.argv) - 1) + (' files' if len(sys.argv) != 2 else ' file'))
+ 
+ if __name__ == "__main__":
+ 	main()