Begin work on macro support

gen6502.py

@@ -1,2 +1,20 @@
+import re, util
+
+class Keys:
+	MACRO_DEFINITION = "MACRO: (.*)"
+	END = "END"
+	@classmethod
+	def find(cls,lines,k):
+		pattern = getattr(cls,k.upper())
+		pattern = pattern if pattern is not None else ""
+		return [(x,re.match(pattern,lines[x])) for x in util.matchinglines(lines,pattern)]
+
 def asm(i):
+	macros = dict()
+	lines = [l.strip() for l in i.split("\n") if l.strip()]
+	for index, m in Keys.find(lines,"macro_definition"):
+		m2 = util.walkup(lines,index,Keys.END)
+#		print(index,m2)
+		macros[m.group(1)]="\n".join(lines[index+1:m2])
+	print(macros)
 	return i