Interface to the Mac List Manager.

Mac/Modules/list/listsupport.py

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+# This script generates a Python interface for an Apple Macintosh Manager.
+# It uses the "bgen" package to generate C code.
+# The function specifications are generated by scanning the mamager's header file,
+# using the "scantools" package (customized for this particular manager).
+
+import string
+
+# Declarations that change for each manager
+MACHEADERFILE = 'Lists.h'		# The Apple header file
+MODNAME = 'List'				# The name of the module
+OBJECTNAME = 'List'			# The basic name of the objects used here
+KIND = 'Handle'				# Usually 'Ptr' or 'Handle'
+
+# The following is *usually* unchanged but may still require tuning
+MODPREFIX = MODNAME			# The prefix for module-wide routines
+OBJECTTYPE = "ListRef"		# The C type used to represent them
+OBJECTPREFIX = MODPREFIX + 'Obj'	# The prefix for object methods
+INPUTFILE = string.lower(MODPREFIX) + 'gen.py' # The file generated by the scanner
+OUTPUTFILE = MODNAME + "module.c"	# The file generated by this program
+
+from macsupport import *
+
+# Create the type objects
+ListRef = OpaqueByValueType("ListRef", "ListObj")
+Cell = Point
+VarOutBufferShortsize = VarHeapOutputBufferType('char', 'short', 's')	# (buf, &len)
+InBufferShortsize = VarInputBufferType('char', 'short', 's')		# (buf, len)
+
+# For LUpdate, we alsways update the complete visible region.
+RgnHandle = FakeType("(*_self->ob_itself)->port->visRgn")
+
+
+includestuff = includestuff + """
+#include <%s>""" % MACHEADERFILE + """
+"""
+
+class ListMethodGenerator(MethodGenerator):
+	"""Similar to MethodGenerator, but has self as last argument"""
+
+	def parseArgumentList(self, args):
+		args, a0 = args[:-1], args[-1]
+		t0, n0, m0 = a0
+		if m0 != InMode:
+			raise ValueError, "method's 'self' must be 'InMode'"
+		self.itself = Variable(t0, "_self->ob_itself", SelfMode)
+		FunctionGenerator.parseArgumentList(self, args)
+		self.argumentList.append(self.itself)
+
+
+
+class MyObjectDefinition(GlobalObjectDefinition):
+	def outputCheckNewArg(self):
+		Output("""if (itself == NULL) {
+					PyErr_SetString(List_Error,"Cannot create null List");
+					return NULL;
+				}""")
+	def outputFreeIt(self, itselfname):
+		Output("LDispose(%s);", itselfname)
+
+# From here on it's basically all boiler plate...
+
+# Create the generator groups and link them
+module = MacModule(MODNAME, MODPREFIX, includestuff, finalstuff, initstuff)
+object = MyObjectDefinition(OBJECTNAME, OBJECTPREFIX, OBJECTTYPE)
+module.addobject(object)
+
+# Create the generator classes used to populate the lists
+Function = FunctionGenerator
+Method = ListMethodGenerator
+
+# Create and populate the lists
+functions = []
+methods = []
+execfile(INPUTFILE)
+
+# add the populated lists to the generator groups
+# (in a different wordl the scan program would generate this)
+for f in functions: module.add(f)
+for f in methods: object.add(f)
+
+# generate output (open the output file as late as possible)
+SetOutputFileName(OUTPUTFILE)
+module.generate()
+