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Pyrex / Pyrex / Compiler / ModuleNode.py

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#
#   Pyrex - Module parse tree node
#

import os, time
from cStringIO import StringIO
from PyrexTypes import CPtrType, py_object_type, typecast
from Pyrex.Utils import set

#  Following is set by Testing.py to suppress filename/date comments
#  in generated files, so as not to produce spurious changes in test
#  reference files.

testing_mode = False 
                    

import Code
import Naming
import Nodes
import Options
import PyrexTypes
import TypeSlots
import Version

from Errors import error
from PyrexTypes import py_object_type
from Pyrex.Utils import open_new_file, replace_suffix

class ModuleNode(Nodes.Node, Nodes.BlockNode):
	#  doc       string or None
	#  body      StatListNode
	#
	#  referenced_modules   [ModuleScope]
	#  module_temp_cname    string
	
	def analyse_declarations(self, env):
		env.doc = self.doc
		self.body.analyse_declarations(env)
	
	def process_implementation(self, env, options, result):
		self.analyse_declarations(env)
		env.check_c_classes()
		self.body.analyse_expressions(env)
		env.return_type = PyrexTypes.c_void_type
		self.referenced_modules = self.find_referenced_modules(env)
		if self.has_imported_c_functions():
			self.module_temp_cname = env.allocate_temp_pyobject()
			env.release_temp(self.module_temp_cname)
		if options.timestamps or options.recursive:
			self.generate_dep_file(env, result)
		self.generate_c_code(env, result)
		self.generate_h_code(env, options, result)
		self.generate_api_code(env, result)
	
	def has_imported_c_functions(self):
		for module in self.referenced_modules:
			for entry in module.cfunc_entries:
				if entry.defined_in_pxd:
					return 1
		return 0
	
	def generate_dep_file(self, env, result):
		modules = self.referenced_modules
		includes = set(env.pyrex_include_files)
		for module in modules:
			for include in module.pyrex_include_files:
				includes.add(include)
		if len(modules) > 1 or includes:
			include_list = list(includes)
			include_list.sort()
			dep_file = replace_suffix(result.c_file, ".dep")
			f = open(dep_file, "w")
			try:
				for module in modules[:-1]:
					f.write("cimport %s\n" % module.qualified_name)
				for path in include_list:
					f.write("include %s\n" % path)
			finally:
				f.close()
	
	def generate_h_code(self, env, options, result):
		def pub(entries): #, pxd = 0):
			return [entry for entry in entries
				if entry.visibility == 'public'] # or pxd and entry.defined_in_pxd]
		denv = env.definition_scope
		h_types = pub(denv.type_entries) + pub(env.type_entries)
		h_vars = pub(denv.var_entries) + pub(env.var_entries)
		h_funcs = pub(denv.cfunc_entries) + pub(env.cfunc_entries)
		h_extension_types = pub(denv.c_class_entries) + pub(env.c_class_entries)
		if h_types or h_vars or h_funcs or h_extension_types:
			result.h_file = replace_suffix(result.c_file, ".h")
			h_code = Code.CCodeWriter(open_new_file(result.h_file))
			if options.generate_pxi:
				result.i_file = replace_suffix(result.c_file, ".pxi")
				i_code = Code.PyrexCodeWriter(result.i_file)
			else:
				i_code = None
			guard = Naming.h_guard_prefix + env.qualified_name.replace(".", "__")
			h_code.put_h_guard(guard)
			self.generate_extern_c_macro_definition(h_code)
			self.generate_type_header_code(h_types, h_code)
			h_code.putln("")
			h_code.putln("#ifndef %s" % Naming.api_guard_prefix + self.api_name(env))
			if h_vars:
				h_code.putln("")
				for entry in h_vars:
					self.generate_public_declaration(entry, h_code, i_code)
			if h_funcs:
				h_code.putln("")
				for entry in h_funcs:
					self.generate_public_declaration(entry, h_code, i_code)
			if h_extension_types:
				h_code.putln("")
				for entry in h_extension_types:
					self.generate_cclass_header_code(entry.type, h_code)
					if i_code:
						self.generate_cclass_include_code(entry.type, i_code)
			h_code.putln("")
			h_code.putln("#endif")
			h_code.putln("")
			h_code.putln("PyMODINIT_FUNC init%s(void);" % env.module_name)
			h_code.putln("")
			h_code.putln("#endif")
	
	def generate_public_declaration(self, entry, h_code, i_code):
		h_code.putln("%s %s;" % (
			Naming.extern_c_macro,
			entry.type.declaration_code(
				entry.cname, dll_linkage = "DL_IMPORT")))
		if i_code:
			i_code.putln("cdef extern %s" % 
				entry.type.declaration_code(entry.cname, pyrex = 1))
	
	def api_name(self, env):
		return env.qualified_name.replace(".", "__")
	
	def generate_api_code(self, env, result):
		denv = env.definition_scope
		api_funcs = []
		public_extension_types = []
		has_api_extension_types = 0
		for entry in denv.cfunc_entries + env.cfunc_entries:
			if entry.api:
				api_funcs.append(entry)
		for entry in denv.c_class_entries + env.c_class_entries:
			if entry.visibility == 'public':
				public_extension_types.append(entry)
			if entry.api:
				has_api_extension_types = 1
		if api_funcs or has_api_extension_types:
			result.api_file = replace_suffix(result.c_file, "_api.h")
			h_code = Code.CCodeWriter(open_new_file(result.api_file))
			name = self.api_name(env)
			guard = Naming.api_guard_prefix + name
			h_code.put_h_guard(guard)
			h_code.putln('#include "Python.h"')
			if result.h_file:
				h_code.putln('#include "%s"' % os.path.basename(result.h_file))
			for entry in public_extension_types:
				type = entry.type
				h_code.putln("")
				h_code.putln("static PyTypeObject *%s;" % type.typeptr_cname)
				h_code.putln("#define %s (*%s)" % (
					type.typeobj_cname, type.typeptr_cname))
			if api_funcs:
				h_code.putln("")
				for entry in api_funcs:
					type = CPtrType(entry.type)
					h_code.putln("static %s;" % type.declaration_code(entry.cname))
			h_code.putln("")
			h_code.put_h_guard(Naming.api_func_guard + "import_module")
			h_code.put(import_module_utility_code[1])
			h_code.putln("")
			h_code.putln("#endif")
			if api_funcs:
				h_code.putln("")
				h_code.put(function_import_utility_code[1])
			if public_extension_types:
				h_code.putln("")
				h_code.put(type_import_utility_code[1])
			h_code.putln("")
			h_code.putln("static int import_%s(void) {" % name)
			h_code.putln("PyObject *module = 0;")
			h_code.putln('module = __Pyx_ImportModule("%s");' % env.qualified_name)
			h_code.putln("if (!module) goto bad;")
			for entry in api_funcs:
				sig = entry.type.signature_string()
				h_code.putln(
					'if (__Pyx_ImportFunction(module, "%s", (void**)&%s, "%s") < 0) goto bad;' % (
						entry.name,
						entry.cname,
						sig))
			h_code.putln("Py_DECREF(module); module = 0;")
			for entry in public_extension_types:
				self.generate_type_import_call(entry.type, h_code, "goto bad;")
			h_code.putln("return 0;")
			h_code.putln("bad:")
			h_code.putln("Py_XDECREF(module);")
			h_code.putln("return -1;")
			h_code.putln("}")
			h_code.putln("")
			h_code.putln("#endif")
	
	def generate_cclass_header_code(self, type, h_code):
		h_code.putln("%s DL_IMPORT(PyTypeObject) %s;" % (
			Naming.extern_c_macro,
			type.typeobj_cname))
		#self.generate_obj_struct_definition(type, h_code)
	
	def generate_cclass_include_code(self, type, i_code):
		i_code.putln("cdef extern class %s.%s:" % (
			type.module_name, type.name))
		i_code.indent()
		var_entries = type.scope.var_entries
		if var_entries:
			for entry in var_entries:
				i_code.putln("cdef %s" % 
					entry.type.declaration_code(entry.cname, pyrex = 1))
		else:
			i_code.putln("pass")
		i_code.dedent()
	
	def generate_c_code(self, env, result):
		code = Code.MainCCodeWriter(StringIO())
		code.h = Code.CCodeWriter(StringIO())
		code.init_labels()
		
		modules = self.referenced_modules
		self.generate_module_preamble(env, modules, code.h)

		code.putln("")
		code.putln("/* Implementation of %s */" % env.qualified_name)
		#self.generate_const_definitions(env, code)
		#self.generate_interned_name_decls(env, code)
		#self.generate_py_string_decls(env, code)
		self.body.generate_function_definitions(env, code)
		#self.generate_interned_name_table(env, code)
		#self.generate_py_string_table(env, code)
		self.generate_typeobj_definitions(env, code)
		self.generate_method_table(env, code)
		self.generate_filename_init_prototype(code)
		self.generate_module_init_func(modules[:-1], env, code)
		self.generate_filename_table(code)
		self.generate_utility_functions(code)

		denv = env.definition_scope
		for module in modules:
			code.h.putln("")
			code.h.putln("/* Declarations from %s */" % module.qualified_name)
			self.generate_declarations_for_module(module, code.h,
				implementation = module is denv)

		code.h.putln("")
		code.h.putln("/* Declarations from implementation of %s */" %
			env.qualified_name)
		self.generate_declarations_for_module(env, code.h, implementation = 1)
		code.global_state.generate_const_declarations(code.h)
		#self.generate_interned_name_table(code.interned_strings, code.h)
		#self.generate_py_string_table(code.py_strings, code.h)
		self.generate_default_value_declarations(env, code.h)

		f = open_new_file(result.c_file)
		f.write(code.h.f.getvalue())
		f.write("\n")
		f.write(code.f.getvalue())
		f.close()
		result.c_file_generated = 1
	
	def find_referenced_modules(self, env):
		#  Given the ImplementationScope, find the DefinitionScopes of all
		#  modules cimported, directly or indirectly. Includes this module's
		#  DefinitionScope as the last entry in the list.
		denv = env.definition_scope
		module_list = []
		modules_seen = set()
		def add_module(module):
			if module not in modules_seen:
				modules_seen.add(module)
				add_modules(module.cimported_modules)
				module_list.append(module)
		def add_modules(modules):
			for module in modules:
				add_module(module)
		modules_seen.add(denv)
		add_modules(denv.cimported_modules)
		add_modules(env.cimported_modules)
		module_list.append(denv)
		#self.print_referenced_modules(module_list) ###
		return module_list
	
	def print_referenced_modules(self, module_list):
		print "find_referenced_modules: result =",
		for m in module_list:
			print m,
		print
		
	def generate_module_preamble(self, env, cimported_modules, code):
		comment = "Generated by Pyrex"
		if not testing_mode:
			comment = "%s %s on %s" % (comment, Version.version, time.asctime())
		code.putln('/* %s */' % comment)
		code.putln('')
		code.putln('#define PY_SSIZE_T_CLEAN')
		for filename in env.python_include_files:
			code.putln('#include "%s"' % filename)
		code.putln("#ifndef PY_LONG_LONG")
		code.putln("  #define PY_LONG_LONG LONG_LONG")
		code.putln("#endif")
		code.putln("#if PY_VERSION_HEX < 0x02050000")
		code.putln("  typedef int Py_ssize_t;")
		code.putln("  #define PY_SSIZE_T_MAX INT_MAX")
		code.putln("  #define PY_SSIZE_T_MIN INT_MIN")
		code.putln("  #define PyInt_FromSsize_t(z) PyInt_FromLong(z)")
		code.putln("  #define PyInt_AsSsize_t(o)	PyInt_AsLong(o)")
		code.putln("#endif")
		code.putln("#ifndef WIN32")
		code.putln("  #ifndef __stdcall")
		code.putln("    #define __stdcall")
		code.putln("  #endif")
		code.putln("  #ifndef __cdecl")
		code.putln("    #define __cdecl")
		code.putln("  #endif")
		code.putln("#endif")
		self.generate_extern_c_macro_definition(code)
		code.putln("#include <math.h>")
		self.generate_includes(env, cimported_modules, code)
		code.putln('')
		code.put(Nodes.utility_function_predeclarations)
		code.putln('')
		code.putln('static PyObject *%s;' % env.module_cname)
		code.putln('static PyObject *%s;' % Naming.builtins_cname)
		code.putln('static int %s;' % Naming.lineno_cname)
		code.putln('static char *%s;' % Naming.filename_cname)
		code.putln('static char **%s;' % Naming.filetable_cname)
		doc = None
		doc1 = env.definition_scope.doc
		doc2 = env.doc
		if doc1 and doc2:
			doc = "%s\\n%s" % (doc1, doc2)
		else:
			doc = doc1 or doc2
		if doc:
			code.putln('')
			code.putln('static char %s[] = "%s";' % (env.doc_cname, doc))
	
	def generate_extern_c_macro_definition(self, code):
		name = Naming.extern_c_macro
		code.putln("#ifdef __cplusplus")
		code.putln('#define %s extern "C"' % name)
		code.putln("#else")
		code.putln("#define %s extern" % name)
		code.putln("#endif")

	def generate_includes(self, env, cimported_modules, code):
		includes = env.include_files[:]
		for module in cimported_modules:
			for filename in module.include_files:
				if filename not in includes:
					includes.append(filename)
		for filename in includes:
			code.putln('#include "%s"' % filename)
	
	def generate_filename_table(self, code):
		code.global_state.generate_filename_table(code)
	
	def generate_declarations_for_module(self, env, code, implementation):
		self.generate_type_predeclarations(env, code)
		self.generate_type_definitions(env, code) #, implementation)
		self.generate_global_declarations(env, code, implementation)
		self.generate_cfunction_predeclarations(env, code, implementation)

	def generate_type_predeclarations(self, env, code):
		pass
	
	def generate_type_header_code(self, type_entries, code):
		# Generate definitions of structs/unions/enums/typedefs/objstructs.
		#self.generate_gcc33_hack(env, code) # Is this still needed?
		#for entry in env.type_entries:
		for entry in type_entries:
			if not entry.in_cinclude:
				#print "generate_type_header_code:", entry.name, repr(entry.type) ###
				type = entry.type
				if type.is_typedef: # Must test this first!
					self.generate_typedef(entry, code)
				elif type.is_struct_or_union:
					self.generate_struct_union_definition(entry, code)
				elif type.is_enum:
					self.generate_enum_definition(entry, code)
				elif type.is_extension_type:
					self.generate_obj_struct_definition(type, code)
	
	def generate_type_definitions(self, env, code): #, implementation):
		#print "generate_type_definitions:", env ###
		type_entries = env.type_entries
		self.generate_type_header_code(type_entries, code)
		for entry in env.c_class_entries:
			if not entry.in_cinclude:
				self.generate_typeobject_predeclaration(entry, code)
				self.generate_exttype_vtable_struct(entry, code)
				self.generate_exttype_vtabptr_declaration(entry, code)
	
#	def generate_gcc33_hack(self, env, code):
#		# Workaround for spurious warning generation in gcc 3.3
#		if 0:
#			code.putln("")
#			for entry in env.c_class_entries:
#				type = entry.type
#				if not type.typedef_flag:
#					name = type.objstruct_cname
#					if name.startswith("__pyx_"):
#						tail = name[6:]
#					else:
#						tail = name
#					code.putln("typedef struct %s __pyx_gcc33_%s;" % (
#						name, tail))
	
	def generate_typedef(self, entry, code):
		base_type = entry.type.typedef_base_type
		code.putln("")
		code.putln("typedef %s;" % base_type.declaration_code(entry.cname))

	def sue_header_footer(self, type, kind, name):
		if type.typedef_flag:
			header = "typedef %s {" % kind
			footer = "} %s;" % name
		else:
			header = "%s %s {" % (kind, name)
			footer = "};"
		return header, footer
	
	def generate_struct_union_definition(self, entry, code):
		type = entry.type
		scope = type.scope
		if scope:
			header, footer = \
				self.sue_header_footer(type, type.kind, type.cname)
			code.putln("")
			code.putln(header)
			var_entries = scope.var_entries
			if not var_entries and not scope.cfunc_entries:
				error(entry.pos,
					"Empty struct or union definition not allowed outside a"
					" 'cdef extern from' block")
			for attr in var_entries:
				code.putln(
					"%s;" %
						attr.type.declaration_code(attr.cname))
			code.putln(footer)

	def generate_enum_definition(self, entry, code):
		type = entry.type
		name = entry.cname or entry.name or ""
		header, footer = \
			self.sue_header_footer(type, "enum", name)
		code.putln("")
		code.putln(header)
		enum_values = entry.enum_values
		if not enum_values:
			error(entry.pos,
				"Empty enum definition not allowed outside a"
				" 'cdef extern from' block")
		else:
			last_entry = enum_values[-1]
			for value_entry in enum_values:
				if value_entry.value == value_entry.name:
					value_code = value_entry.cname
				else:
					value_code = ("%s = %s" % (
						value_entry.cname,
						value_entry.value))
				if value_entry is not last_entry:
					value_code += ","
				code.putln(value_code)
		code.putln(footer)
	
	def generate_typeobject_predeclaration(self, entry, code):
		code.putln("")
		name = entry.type.typeobj_cname
		if name:
			if entry.visibility == 'extern' and not entry.in_cinclude:
				code.putln("%s DL_IMPORT(PyTypeObject) %s;" % (
					Naming.extern_c_macro,
					name))
			elif entry.visibility == 'public':
				#code.putln("DL_EXPORT(PyTypeObject) %s;" % name)
				code.putln("%s DL_EXPORT(PyTypeObject) %s;" % (
					Naming.extern_c_macro,
					name))
	
	def generate_exttype_vtable_struct(self, entry, code):
		# Generate struct declaration for an extension type's vtable.
		type = entry.type
		scope = type.scope
		if type.vtabstruct_cname:
			code.putln("")
			code.putln(
				"struct %s {" %
					type.vtabstruct_cname)
			if type.base_type and type.base_type.vtabstruct_cname:
				code.putln("struct %s %s;" % (
					type.base_type.vtabstruct_cname,
					Naming.obj_base_cname))
			for method_entry in scope.cfunc_entries:
				if not method_entry.is_inherited:
					code.putln(
						"%s;" % method_entry.type.declaration_code("(*%s)" % method_entry.name))
			code.putln(
				"};")
	
	def generate_exttype_vtabptr_declaration(self, entry, code):
		# Generate declaration of pointer to an extension type's vtable.
		type = entry.type
		if type.vtabptr_cname:
			code.putln("static struct %s *%s;" % (
				type.vtabstruct_cname,
				type.vtabptr_cname))
	
	def generate_obj_struct_definition(self, type, code):
		# Generate object struct definition for an
		# extension type.
		if not type.scope:
			return # Forward declared but never defined
		header, footer = \
			self.sue_header_footer(type, "struct", type.objstruct_cname)
		code.putln("")
		code.putln(header)
		base_type = type.base_type
		if base_type:
			code.putln(
				"%s%s %s;" % (
					("struct ", "")[base_type.typedef_flag],
					base_type.objstruct_cname,
					Naming.obj_base_cname))
		else:
			code.putln(
				"PyObject_HEAD")
		if type.vtabslot_cname and not (type.base_type and type.base_type.vtabslot_cname):
			code.putln(
				"struct %s *%s;" % (
					type.vtabstruct_cname,
					type.vtabslot_cname))
		for attr in type.scope.var_entries:
			code.putln(
				"%s;" %
					attr.type.declaration_code(attr.cname))
		code.putln(footer)
	
	def generate_global_declarations(self, env, code, implementation):
		code.putln("")
		for entry in env.c_class_entries:
			if implementation or entry.defined_in_pxd:
				code.putln("static PyTypeObject *%s = 0;" % 
					entry.type.typeptr_cname)
		#code.putln("/* var_entries */") ###
		code.put_var_declarations(env.var_entries, static = 1, 
			dll_linkage = "DL_EXPORT", definition = implementation)
	
	def generate_default_value_declarations(self, env, code):
		#code.putln("/* default_entries */") ###
		code.putln("")
		code.put_var_declarations(env.default_entries, static = 1)
	
	def generate_cfunction_predeclarations(self, env, code, implementation):
		for entry in env.cfunc_entries:
			if not entry.in_cinclude:
					# and (definition or entry.defined_in_pxd or
					# entry.visibility == 'extern'):
				if entry.visibility in ('public', 'extern'):
					dll_linkage = "DL_EXPORT"
				else:
					dll_linkage = None
				type = entry.type
				if not implementation: #and entry.defined_in_pxd:
					type = CPtrType(type)
				header = type.declaration_code(entry.cname, 
					dll_linkage = dll_linkage)
				if entry.visibility <> 'private':
					storage_class = "%s " % Naming.extern_c_macro
				else:
					storage_class = "static "
				code.putln("%s%s; /*proto*/" % (
					storage_class,
					header))
	
	def generate_typeobj_definitions(self, env, code):
		full_module_name = env.qualified_name
		denv = env.definition_scope
		for entry in denv.c_class_entries + env.c_class_entries:
			#print "generate_typeobj_definitions:", entry.name
			#print "...visibility =", entry.visibility
			if entry.visibility <> 'extern':
				type = entry.type
				scope = type.scope
				if scope: # could be None if there was an error
					self.generate_exttype_vtable(scope, code)
					self.generate_new_function(scope, code)
					self.generate_dealloc_function(scope, code)
					self.generate_traverse_function(scope, code)
					self.generate_clear_function(scope, code)
					if scope.defines_any(["__getitem__"]):
						self.generate_getitem_int_function(scope, code)
					if scope.defines_any(["__setitem__", "__delitem__"]):
						self.generate_ass_subscript_function(scope, code)
					if scope.defines_any(["__setslice__", "__delslice__"]):
						self.generate_ass_slice_function(scope, code)
					if scope.defines_any(["__getattr__"]):
						self.generate_getattro_function(scope, code)
					if scope.defines_any(["__setattr__", "__delattr__"]):
						self.generate_setattro_function(scope, code)
					if scope.defines_any(["__get__"]):
						self.generate_descr_get_function(scope, code)
					if scope.defines_any(["__set__", "__delete__"]):
						self.generate_descr_set_function(scope, code)
					self.generate_property_accessors(scope, code)
					self.generate_method_table(scope, code)
					self.generate_member_table(scope, code)
					self.generate_getset_table(scope, code)
					self.generate_typeobj_definition(full_module_name, entry, code)
	
	def generate_exttype_vtable(self, scope, code):
		# Generate the definition of an extension type's vtable.
		type = scope.parent_type
		if type.vtable_cname:
			code.putln("static struct %s %s;" % (
				type.vtabstruct_cname,
				type.vtable_cname))
		
	def generate_self_cast(self, scope, code):
		type = scope.parent_type
		code.putln(
			"%s = (%s)o;" % (
				type.declaration_code("p"),
				type.declaration_code("")))
	
	def generate_new_function(self, scope, code):
		type = scope.parent_type
		base_type = type.base_type
		py_attrs = []
		for entry in scope.var_entries:
			if entry.type.is_pyobject:
				py_attrs.append(entry)
		need_self_cast = type.vtabslot_cname or py_attrs
		code.putln("")
		code.putln(
			"static PyObject *%s(PyTypeObject *t, PyObject *a, PyObject *k) {"
				% scope.mangle_internal("tp_new"))
		if need_self_cast:
			code.putln(
				"%s;"
					% scope.parent_type.declaration_code("p"))
		if base_type:
			code.putln(
				"PyObject *o = %s->tp_new(t, a, k);" %
					base_type.typeptr_cname)
		else:
			code.putln(
				"PyObject *o = (*t->tp_alloc)(t, 0);")
		code.putln(
				"if (!o) return 0;")
		if need_self_cast:
			code.putln(
				"p = %s;"
					% type.cast_code("o"))
		#if need_self_cast:
		#	self.generate_self_cast(scope, code)
		if type.vtabslot_cname:
			code.putln("*(struct %s **)&p->%s = %s;" % (
				type.vtabstruct_cname,
				type.vtabslot_cname,
				type.vtabptr_cname))
		for entry in py_attrs:
			if entry.name == "__weakref__":
				code.putln("p->%s = 0;" % entry.cname)
			else:
				code.put_init_var_to_py_none(entry, "p->%s")
		entry = scope.lookup_here("__new__")
		if entry:
			code.putln(
				"if (%s(o, a, k) < 0) {" % 
					entry.func_cname)
			code.put_decref_clear("o", py_object_type);
			code.putln(
				"}")
		code.putln(
			"return o;")
		code.putln(
			"}")
	
	def generate_dealloc_function(self, scope, code):
		base_type = scope.parent_type.base_type
		code.putln("")
		code.putln(
			"static void %s(PyObject *o) {"
				% scope.mangle_internal("tp_dealloc"))
		#py_attrs = []
		#for entry in scope.var_entries:
		#	if entry.type.is_pyobject and entry.name <> "__weakref__":
		#		py_attrs.append(entry)
		py_attrs = scope.pyattr_entries
		if py_attrs:
			self.generate_self_cast(scope, code)
		self.generate_usr_dealloc_call(scope, code)
		if scope.lookup_here("__weakref__"):
			code.putln("PyObject_ClearWeakRefs(o);")
		for entry in py_attrs:
			code.put_xdecref("p->%s" % entry.cname, entry.type)
		if base_type:
			code.putln(
				"%s->tp_dealloc(o);" %
					base_type.typeptr_cname)
		else:
			code.putln(
				"(*o->ob_type->tp_free)(o);")
		code.putln(
			"}")
	
	def generate_usr_dealloc_call(self, scope, code):
		entry = scope.lookup_here("__dealloc__")
		if entry:
			code.putln(
				"{")
			code.putln(
					"PyObject *etype, *eval, *etb;")
			code.putln(
					"PyErr_Fetch(&etype, &eval, &etb);")
			code.putln(
					"++o->ob_refcnt;")
			code.putln(
					"%s(o);" % 
						entry.func_cname)
			code.putln(
					"if (PyErr_Occurred()) PyErr_WriteUnraisable(o);")
			code.putln(
					"--o->ob_refcnt;")
			code.putln(
					"PyErr_Restore(etype, eval, etb);")
			code.putln(
				"}")
	
	def generate_traverse_function(self, scope, code):
		py_attrs = scope.pyattr_entries
		if py_attrs:
			base_type = scope.parent_type.base_type
			code.putln("")
			code.putln(
				"static int %s(PyObject *o, visitproc v, void *a) {"
					% scope.mangle_internal("tp_traverse"))
			code.putln(
				"int e;")
			self.generate_self_cast(scope, code)
			if base_type:
				code.putln(
					"traverseproc t;")
				code.putln(
						"if ((t = %s->tp_traverse)) {" %
							base_type.typeptr_cname)
				code.putln(
							"e = t(o, v, a); if (e) return e;")
				code.putln(
						"}")
			for entry in py_attrs:
				var_code = "p->%s" % entry.cname
				code.putln(
						"if (%s) {"
							% var_code)
				if entry.type.is_extension_type:
					var_code = "((PyObject*)%s)" % var_code
				code.putln(
							"e = (*v)(%s, a); if (e) return e;" 
								% var_code)
				code.putln(
						"}")
			code.putln(
					"return 0;")
			code.putln(
				"}")
	
	def generate_clear_function(self, scope, code):
		py_attrs = scope.pyattr_entries
		if py_attrs:
			base_type = scope.parent_type.base_type
			code.putln("")
			code.putln(
				"static int %s(PyObject *o) {"
					% scope.mangle_internal("tp_clear"))
			self.generate_self_cast(scope, code)
			code.putln(
					"PyObject *t;")
			if base_type:
				code.putln(
					"inquiry c;")
				code.putln(
					"if ((c = %s->tp_clear)) {" %
						base_type.typeptr_cname)
				code.putln(
						"c(o);")
				code.putln(
					"}")
			for entry in py_attrs:
				name = "p->%s" % entry.cname
				code.putln(
					"t = %s; " %
						typecast(py_object_type, entry.type, name))
				code.put_init_var_to_py_none(entry, "p->%s")
				#code.put_xdecref(name, entry.type)
				code.putln(
					"Py_XDECREF(t);")
			code.putln(
				"return 0;")
			code.putln(
				"}")
		
	def generate_getitem_int_function(self, scope, code):
		# This function is put into the sq_item slot when
		# a __getitem__ method is present. It converts its
		# argument to a Python integer and calls mp_subscript.
		code.putln(
			"static PyObject *%s(PyObject *o, Py_ssize_t i) {" %
				scope.mangle_internal("sq_item"))
		code.putln(
				"PyObject *r;")
		code.putln(
				"PyObject *x = PyInt_FromSsize_t(i); if(!x) return 0;")
		code.putln(
				"r = o->ob_type->tp_as_mapping->mp_subscript(o, x);")
		code.putln(
				"Py_DECREF(x);")
		code.putln(
				"return r;")
		code.putln(
			"}")

	def generate_ass_subscript_function(self, scope, code):
		# Setting and deleting an item are both done through
		# the ass_subscript method, so we dispatch to user's __setitem__
		# or __delitem__, or raise an exception.
		base_type = scope.parent_type.base_type
		set_entry = scope.lookup_here("__setitem__")
		del_entry = scope.lookup_here("__delitem__")
		code.putln("")
		code.putln(
			"static int %s(PyObject *o, PyObject *i, PyObject *v) {" %
				scope.mangle_internal("mp_ass_subscript"))
		code.putln(
				"if (v) {")
		if set_entry:
			code.putln(
					"return %s(o, i, v);" %
						set_entry.func_cname)
		else:
			self.generate_guarded_basetype_call(
				base_type, "tp_as_mapping", "mp_ass_subscript", "o, i, v", code)
			code.putln(
					"PyErr_Format(PyExc_NotImplementedError,")
			code.putln(
					'  "Subscript assignment not supported by %s", o->ob_type->tp_name);')
			code.putln(
					"return -1;")
		code.putln(
				"}")
		code.putln(
				"else {")
		if del_entry:
			code.putln(
					"return %s(o, i);" %
						del_entry.func_cname)
		else:
			self.generate_guarded_basetype_call(
				base_type, "tp_as_mapping", "mp_ass_subscript", "o, i, v", code)
			code.putln(
					"PyErr_Format(PyExc_NotImplementedError,")
			code.putln(
					'  "Subscript deletion not supported by %s", o->ob_type->tp_name);')
			code.putln(
					"return -1;")
		code.putln(
				"}")
		code.putln(
			"}")
	
	def generate_guarded_basetype_call(
			self, base_type, substructure, slot, args, code):
		if base_type:
			base_tpname = base_type.typeptr_cname
			if substructure:
				code.putln(
					"if (%s->%s && %s->%s->%s)" % (
						base_tpname, substructure, base_tpname, substructure, slot))
				code.putln(
					"  return %s->%s->%s(%s);" % (
						base_tpname, substructure, slot, args))
			else:
				code.putln(
					"if (%s->%s)" % (
						base_tpname, slot))
				code.putln(
					"  return %s->%s(%s);" % (
						base_tpname, slot, args))

	def generate_ass_slice_function(self, scope, code):
		# Setting and deleting a slice are both done through
		# the ass_slice method, so we dispatch to user's __setslice__
		# or __delslice__, or raise an exception.
		base_type = scope.parent_type.base_type
		set_entry = scope.lookup_here("__setslice__")
		del_entry = scope.lookup_here("__delslice__")
		code.putln("")
		code.putln(
			"static int %s(PyObject *o, Py_ssize_t i, Py_ssize_t j, PyObject *v) {" %
				scope.mangle_internal("sq_ass_slice"))
		code.putln(
				"if (v) {")
		if set_entry:
			code.putln(
					"return %s(o, i, j, v);" %
						set_entry.func_cname)
		else:
			self.generate_guarded_basetype_call(
				base_type, "tp_as_sequence", "sq_ass_slice", "o, i, j, v", code)
			code.putln(
					"PyErr_Format(PyExc_NotImplementedError,")
			code.putln(
					'  "2-element slice assignment not supported by %s", o->ob_type->tp_name);')
			code.putln(
					"return -1;")
		code.putln(
				"}")
		code.putln(
				"else {")
		if del_entry:
			code.putln(
					"return %s(o, i, j);" %
						del_entry.func_cname)
		else:
			self.generate_guarded_basetype_call(
				base_type, "tp_as_sequence", "sq_ass_slice", "o, i, j, v", code)
			code.putln(
					"PyErr_Format(PyExc_NotImplementedError,")
			code.putln(
					'  "2-element slice deletion not supported by %s", o->ob_type->tp_name);')
			code.putln(
					"return -1;")
		code.putln(
				"}")
		code.putln(
			"}")

	def generate_getattro_function(self, scope, code):
		# First try to get the attribute using PyObject_GenericGetAttr.
		# If that raises an AttributeError, call the user's __getattr__
		# method.
		entry = scope.lookup_here("__getattr__")
		code.putln("")
		code.putln(
			"static PyObject *%s(PyObject *o, PyObject *n) {"
				% scope.mangle_internal("tp_getattro"))
		code.putln(
				"PyObject *v = PyObject_GenericGetAttr(o, n);")
		code.putln(
				"if (!v && PyErr_ExceptionMatches(PyExc_AttributeError)) {")
		code.putln(
					"PyErr_Clear();")
		code.putln(
					"v = %s(o, n);" %
						entry.func_cname)
		code.putln(
				"}")
		code.putln(
				"return v;")
		code.putln(
			"}")
	
	def generate_setattro_function(self, scope, code):
		# Setting and deleting an attribute are both done through
		# the setattro method, so we dispatch to user's __setattr__
		# or __delattr__ or fall back on PyObject_GenericSetAttr.
		base_type = scope.parent_type.base_type
		set_entry = scope.lookup_here("__setattr__")
		del_entry = scope.lookup_here("__delattr__")
		code.putln("")
		code.putln(
			"static int %s(PyObject *o, PyObject *n, PyObject *v) {" %
				scope.mangle_internal("tp_setattro"))
		code.putln(
				"if (v) {")
		if set_entry:
			code.putln(
					"return %s(o, n, v);" %
						set_entry.func_cname)
		else:
			self.generate_guarded_basetype_call(
				base_type, None, "tp_setattro", "o, n, v", code)
			code.putln(
					"return PyObject_GenericSetAttr(o, n, v);")
		code.putln(
				"}")
		code.putln(
				"else {")
		if del_entry:
			code.putln(
					"return %s(o, n);" %
						del_entry.func_cname)
		else:
			self.generate_guarded_basetype_call(
				base_type, None, "tp_setattro", "o, n, v", code)
			code.putln(
					"return PyObject_GenericSetAttr(o, n, 0);")
		code.putln(
				"}")
		code.putln(
			"}")
	
	def generate_descr_get_function(self, scope, code):
		# The __get__ function of a descriptor object can be
		# called with NULL for the second or third arguments
		# under some circumstances, so we replace them with
		# None in that case.
		user_get_entry = scope.lookup_here("__get__")
		code.putln("")
		code.putln(
			"static PyObject *%s(PyObject *o, PyObject *i, PyObject *c) {" %
				scope.mangle_internal("tp_descr_get"))
		code.putln(
			"PyObject *r = 0;")
		code.putln(
			"if (!i) i = Py_None;")
		code.putln(
			"if (!c) c = Py_None;")
		#code.put_incref("i", py_object_type)
		#code.put_incref("c", py_object_type)
		code.putln(
			"r = %s(o, i, c);" %
				user_get_entry.func_cname)
		#code.put_decref("i", py_object_type)
		#code.put_decref("c", py_object_type)
		code.putln(
			"return r;")
		code.putln(
			"}")
	
	def generate_descr_set_function(self, scope, code):
		# Setting and deleting are both done through the __set__
		# method of a descriptor, so we dispatch to user's __set__
		# or __delete__ or raise an exception.
		base_type = scope.parent_type.base_type
		user_set_entry = scope.lookup_here("__set__")
		user_del_entry = scope.lookup_here("__delete__")
		code.putln("")
		code.putln(
			"static int %s(PyObject *o, PyObject *i, PyObject *v) {" %
				scope.mangle_internal("tp_descr_set"))
		code.putln(
				"if (v) {")
		if user_set_entry:
			code.putln(
					"return %s(o, i, v);" %
						user_set_entry.func_cname)
		else:
			self.generate_guarded_basetype_call(
				base_type, None, "tp_descr_set", "o, i, v", code)
			code.putln(
					'PyErr_SetString(PyExc_NotImplementedError, "__set__");')
			code.putln(
					"return -1;")
		code.putln(
				"}")
		code.putln(
				"else {")
		if user_del_entry:
			code.putln(
					"return %s(o, i);" %
						user_del_entry.func_cname)
		else:
			self.generate_guarded_basetype_call(
				base_type, None, "tp_descr_set", "o, i, v", code)
			code.putln(
					'PyErr_SetString(PyExc_NotImplementedError, "__delete__");')
			code.putln(
					"return -1;")
		code.putln(
				"}")		
		code.putln(
			"}")
	
	def generate_property_accessors(self, cclass_scope, code):
		for entry in cclass_scope.property_entries:
			property_scope = entry.scope
			if property_scope.defines_any(["__get__"]):
				self.generate_property_get_function(entry, code)
			if property_scope.defines_any(["__set__", "__del__"]):
				self.generate_property_set_function(entry, code)
	
	def generate_property_get_function(self, property_entry, code):
		property_scope = property_entry.scope
		property_entry.getter_cname = property_scope.parent_scope.mangle(
			Naming.prop_get_prefix, property_entry.name)
		get_entry = property_scope.lookup_here("__get__")
		code.putln("")
		code.putln(
			"static PyObject *%s(PyObject *o, void *x) {" %
				property_entry.getter_cname)
		code.putln(
				"return %s(o);" %
					get_entry.func_cname)
		code.putln(
			"}")
	
	def generate_property_set_function(self, property_entry, code):
		property_scope = property_entry.scope
		property_entry.setter_cname = property_scope.parent_scope.mangle(
			Naming.prop_set_prefix, property_entry.name)
		set_entry = property_scope.lookup_here("__set__")
		del_entry = property_scope.lookup_here("__del__")
		code.putln("")
		code.putln(
			"static int %s(PyObject *o, PyObject *v, void *x) {" %
				property_entry.setter_cname)
		code.putln(
				"if (v) {")
		if set_entry:
			code.putln(
					"return %s(o, v);" %
						set_entry.func_cname)
		else:
			code.putln(
					'PyErr_SetString(PyExc_NotImplementedError, "__set__");')
			code.putln(
					"return -1;")
		code.putln(
				"}")
		code.putln(
				"else {")
		if del_entry:
			code.putln(
					"return %s(o);" %
						del_entry.func_cname)
		else:
			code.putln(
					'PyErr_SetString(PyExc_NotImplementedError, "__del__");')
			code.putln(
					"return -1;")
		code.putln(
				"}")
		code.putln(
			"}")

	def generate_typeobj_definition(self, modname, entry, code):
		type = entry.type
		scope = type.scope
		for suite in TypeSlots.substructures:
			suite.generate_substructure(scope, code)
		code.putln("")
		if entry.visibility == 'public':
			header = "DL_EXPORT(PyTypeObject) %s = {"
		else:
			header = "PyTypeObject %s = {"
		code.putln(header % type.typeobj_cname)
		code.putln(
			"PyObject_HEAD_INIT(0)")
		code.putln(
			"0, /*ob_size*/")
		code.putln(
			'"%s.%s", /*tp_name*/' % (
				modname, scope.class_name))
		if type.typedef_flag:
			objstruct = type.objstruct_cname
		else:
			#objstruct = "struct %s" % scope.parent_type.objstruct_cname
			objstruct = "struct %s" % type.objstruct_cname
		code.putln(
			"sizeof(%s), /*tp_basicsize*/" %
				objstruct)
		code.putln(
			"0, /*tp_itemsize*/")
		for slot in TypeSlots.slot_table:
			slot.generate(scope, code)
		code.putln(
			"};")
	
	def generate_method_table(self, env, code):
		code.putln("")
		code.putln(
			"static struct PyMethodDef %s[] = {" % 
				env.method_table_cname)
		for entry in env.pyfunc_entries:
				code.put_pymethoddef(entry, ",")
		code.putln(
				"{0, 0, 0, 0}")
		code.putln(
			"};")
	
	def generate_member_table(self, env, code):
		#print "ModuleNode.generate_member_table: scope =", env ###
		if env.public_attr_entries:
			code.putln("")
			code.putln(
				"static struct PyMemberDef %s[] = {" %
					env.member_table_cname)
			type = env.parent_type
			if type.typedef_flag:
				objstruct = type.objstruct_cname
			else:
				objstruct = "struct %s" % type.objstruct_cname
			for entry in env.public_attr_entries:
				type_code = entry.type.pymemberdef_typecode
				if entry.visibility == 'readonly':
					flags = "READONLY"
				else:
					flags = "0"
				code.putln('{"%s", %s, %s, %s, 0},' % (
					entry.name,
					type_code,
					"offsetof(%s, %s)" % (objstruct, entry.name),
					flags))
			code.putln(
					"{0, 0, 0, 0, 0}")
			code.putln(
				"};")
	
	def generate_getset_table(self, env, code):
		if env.property_entries:
			code.putln("")
			code.putln(
				"static struct PyGetSetDef %s[] = {" %
					env.getset_table_cname)
			for entry in env.property_entries:
				if entry.doc:
					doc_code = code.get_string_const(entry.doc)
				else:
					doc_code = "0"
				code.putln(
					'{"%s", %s, %s, %s, 0},' % (
						entry.name,
						entry.getter_cname or "0",
						entry.setter_cname or "0",
						doc_code))
			code.putln(
					"{0, 0, 0, 0, 0}")
			code.putln(
				"};")
	
	def generate_interned_name_table(self, interned_strings, code):
		code.putln("")
		code.putln(
			"static PyObject **%s[] = {" % Naming.intern_tab_cname)
		for s in interned_strings:
			code.putln("&%s," % s.py_cname)
		code.putln("0")
		code.putln(
			"};")

	def generate_filename_init_prototype(self, code):
		code.putln("");
		code.putln("static void %s(void); /*proto*/" % Naming.fileinit_cname)

	def generate_module_init_func(self, imported_modules, env, code):
		denv = env.definition_scope
		code.putln("")
		header = "PyMODINIT_FUNC init%s(void)" % env.module_name
		code.putln("%s; /*proto*/" % header)
		code.putln("%s {" % header)
		code.put_var_declarations(env.temp_entries)

		#code.putln("/*--- Libary function declarations ---*/")
		env.generate_library_function_declarations(code)
		self.generate_filename_init_call(code)

		#code.putln("/*--- Module creation code ---*/")
		self.generate_module_creation_code(env, code)

		#code.putln("/*--- String init code ---*/")
		self.generate_string_init_code(env, code)

		#code.putln("/*--- Intern code ---*/")
		#self.generate_intern_code(env, code)

		#code.putln("/*--- Global init code ---*/")
		self.generate_global_init_code(env, code)
		
		#code.putln("/*--- Function export code ---*/")
		self.generate_pxd_function_export_code(env, code)
		self.generate_api_function_export_code(env, code)

		#code.putln("/*--- Function import code ---*/")
		for module in imported_modules:
			self.generate_c_function_import_code_for_module(module, env, code)

		#code.putln("/*--- Type init code ---*/")
		self.generate_type_init_code(env, code)

		#code.putln("/*--- Type import code ---*/")
		for module in imported_modules:
			self.generate_type_import_code_for_module(module, env, code)

		#code.putln("/*--- Execution code ---*/")
		self.body.generate_execution_code(code)
		code.putln("return;")
		code.put_label(code.error_label)
		code.put_var_xdecrefs(env.temp_entries)
		code.putln('__Pyx_AddTraceback("%s");' % (env.qualified_name))
		code.use_utility_code(Nodes.traceback_utility_code)
		code.putln('}')
	
	def generate_filename_init_call(self, code):
		code.putln("%s();" % Naming.fileinit_cname)
	
	def generate_module_creation_code(self, env, code):
		# Generate code to create the module object and
		# install the builtins.
		if env.doc:
			doc = env.doc_cname
		else:
			doc = "0"
		code.putln(
			'%s = Py_InitModule4("%s", %s, %s, 0, PYTHON_API_VERSION);' % (
				env.module_cname, 
				env.module_name, 
				env.method_table_cname, 
				doc))
		code.putln(
			"if (!%s) %s;" % (
				env.module_cname,
				code.error_goto(self.pos)));
		code.putln(
			"Py_INCREF(%s);" %
				env.module_cname)
		code.putln(
			'%s = PyImport_AddModule("__builtin__");' %
				Naming.builtins_cname)
		code.putln(
			"if (!%s) %s;" % (
				Naming.builtins_cname,
				code.error_goto(self.pos)));
		code.putln(
			'if (PyObject_SetAttrString(%s, "__builtins__", %s) < 0) %s;' % (
				env.module_cname,
				Naming.builtins_cname,
				code.error_goto(self.pos)))
	
	def generate_string_init_code(self, env, code):
		code.use_utility_code(Nodes.init_string_tab_utility_code)
		code.putln(
			"if (__Pyx_InitStrings(%s) < 0) %s;" % (
				Naming.stringtab_cname,
				code.error_goto(self.pos)))
	
	def generate_global_init_code(self, env, code):
		# Generate code to initialise global PyObject *
		# variables to None.
		for entry in env.var_entries:
			if entry.visibility <> 'extern':
				if entry.type.is_pyobject:
					code.put_init_var_to_py_none(entry)
	
	def generate_pxd_function_export_code(self, env, code):
		denv = env.definition_scope
		for entry in denv.cfunc_entries:
			self.generate_c_function_export_code(env, entry, code)
	
	def generate_api_function_export_code(self, env, code):
		for entry in env.cfunc_entries:
			if entry.api:
				self.generate_c_function_export_code(env, entry, code)

	def generate_c_function_export_code(self, env, entry, code):
		code.use_utility_code(function_export_utility_code)
		signature = entry.type.signature_string()
		code.putln('if (__Pyx_ExportFunction("%s", (void*)%s, "%s") < 0) %s' % (
			entry.name,
			entry.cname,
			signature, 
			code.error_goto(self.pos)))
	
	def generate_type_import_code_for_module(self, module, env, code):
		# Generate type import code for all exported extension types in
		# an imported module.
		#if module.c_class_entries:
		#print "generate_type_import_code_for_module:", module ###
		for entry in module.c_class_entries:
			if entry.defined_in_pxd:
				self.generate_type_import_code(env, entry.type, entry.pos, code)
	
	def generate_c_function_import_code_for_module(self, module, env, code):
		# Generate import code for all exported C functions in a cimported module.
		entries = []
		for entry in module.cfunc_entries:
			if entry.defined_in_pxd:
				entries.append(entry)
		if entries:
			code.use_utility_code(import_module_utility_code)
			code.use_utility_code(function_import_utility_code)
			temp = self.module_temp_cname
			code.putln(
				'%s = __Pyx_ImportModule("%s"); if (!%s) %s' % (
					temp,
					module.qualified_name,
					temp,
					code.error_goto(self.pos)))
			for entry in entries:
				code.putln(
					'if (__Pyx_ImportFunction(%s, "%s", (void**)&%s, "%s") < 0) %s' % (
						temp,
						entry.name,
						entry.cname,
						entry.type.signature_string(),
						code.error_goto(self.pos)))
			code.putln("Py_DECREF(%s); %s = 0;" % (temp, temp))
	
	def generate_type_init_code(self, env, code):
		# Generate type import code for extern extension types
		# and type ready code for non-extern ones.
		#print "generate_type_init_code:", env ###
		denv = env.definition_scope
		for entry in denv.c_class_entries + env.c_class_entries:
			if entry.visibility == 'extern':
				self.generate_type_import_code(env, entry.type, entry.pos, code)
			else:
				self.generate_base_type_import_code(env, entry, code)
				self.generate_exttype_vtable_init_code(entry, code)
				self.generate_type_ready_code(env, entry, code)
				self.generate_typeptr_assignment_code(entry, code)
	
	def generate_base_type_import_code(self, env, entry, code):
		base_type = entry.type.base_type
		if base_type and base_type.module_name <> env.qualified_name:
			self.generate_type_import_code(env, base_type, self.pos, code)
	
	def use_type_import_utility_code(self, code):
		import ExprNodes
		code.use_utility_code(type_import_utility_code)
		code.use_utility_code(import_module_utility_code)
	
	def generate_type_import_code(self, env, type, pos, code):
		# If not already done, generate code to import the typeobject of an
		# extension type defined in another module, and extract its C method
		# table pointer if any.
		#print "generate_type_import_code:", type ###
		if type in env.types_imported:
			return
		if type.typedef_flag:
			objstruct = type.objstruct_cname
		else:
			objstruct = "struct %s" % type.objstruct_cname
		self.generate_type_import_call(type, code, code.error_goto(pos))
		self.use_type_import_utility_code(code)
		if type.vtabptr_cname:
			code.putln(
				"if (__Pyx_GetVtable(%s->tp_dict, &%s) < 0) %s" % (
					type.typeptr_cname,
					type.vtabptr_cname,
					code.error_goto(pos)))
			code.use_utility_code(Nodes.get_vtable_utility_code)
		env.types_imported[type] = 1
	
	def generate_type_import_call(self, type, code, error_code):
		if type.typedef_flag:
			objstruct = type.objstruct_cname
		else:
			objstruct = "struct %s" % type.objstruct_cname
		code.putln('%s = __Pyx_ImportType("%s", "%s", sizeof(%s)); if (!%s) %s' % (
			type.typeptr_cname,
			type.module_name, 
			type.name,
			objstruct,
			type.typeptr_cname,
			error_code))
	
	def generate_type_ready_code(self, env, entry, code):
		# Generate a call to PyType_Ready for an extension
		# type defined in this module.
		type = entry.type
		typeobj_cname = type.typeobj_cname
		scope = type.scope
		if scope: # could be None if there was an error
			if entry.visibility <> 'extern':
				for slot in TypeSlots.slot_table:
					slot.generate_dynamic_init_code(scope, code)
				code.putln(
					"if (PyType_Ready(&%s) < 0) %s" % (
						typeobj_cname,
						code.error_goto(entry.pos)))
				if type.vtable_cname:
					code.putln(
						"if (__Pyx_SetVtable(%s.tp_dict, %s) < 0) %s" % (
							typeobj_cname,
							type.vtabptr_cname,
							code.error_goto(entry.pos)))
					code.use_utility_code(Nodes.set_vtable_utility_code)
				code.putln(
					'if (PyObject_SetAttrString(%s, "%s", (PyObject *)&%s) < 0) %s' % (
						Naming.module_cname,
						scope.class_name,
						typeobj_cname,
						code.error_goto(entry.pos)))
				weakref_entry = scope.lookup_here("__weakref__")
				if weakref_entry:
					if weakref_entry.type is py_object_type:
						tp_weaklistoffset = "%s.tp_weaklistoffset" % typeobj_cname
						code.putln("if (%s == 0) %s = offsetof(struct %s, %s);" % (
							tp_weaklistoffset,
							tp_weaklistoffset,
							type.objstruct_cname,
							weakref_entry.cname))
					else:
						error(weakref_entry.pos, "__weakref__ slot must be of type 'object'")
	
	def generate_exttype_vtable_init_code(self, entry, code):
		# Generate code to initialise the C method table of an
		# extension type.
		type = entry.type
		if type.vtable_cname:
			code.putln(
				"%s = &%s;" % (
					type.vtabptr_cname,
					type.vtable_cname))
			if type.base_type and type.base_type.vtabptr_cname:
				code.putln(
					"%s.%s = *%s;" % (
						type.vtable_cname,
						Naming.obj_base_cname,
						type.base_type.vtabptr_cname))
			for meth_entry in type.scope.cfunc_entries:
				if meth_entry.func_cname:
					code.putln(
						"*(void(**)(void))&%s.%s = (void(*)(void))%s;" % (
							type.vtable_cname,
							meth_entry.cname,
							meth_entry.func_cname))
	
	def generate_typeptr_assignment_code(self, entry, code):
		# Generate code to initialise the typeptr of an extension
		# type defined in this module to point to its type object.
		type = entry.type
		if type.typeobj_cname:
			code.putln(
				"%s = &%s;" % (
					type.typeptr_cname, type.typeobj_cname))
	
	def generate_utility_functions(self, code):
		code.global_state.generate_utility_functions(code)

#------------------------------------------------------------------------------------
#
#  Runtime support code
#
#------------------------------------------------------------------------------------

import_module_utility_code = [
"""
static PyObject *__Pyx_ImportModule(char *name); /*proto*/
""","""
#ifndef __PYX_HAVE_RT_ImportModule
#define __PYX_HAVE_RT_ImportModule
static PyObject *__Pyx_ImportModule(char *name) {
	PyObject *py_name = 0;
	
	py_name = PyString_FromString(name);
	if (!py_name)
		goto bad;
	return PyImport_Import(py_name);
bad:
	Py_XDECREF(py_name);
	return 0;
}
#endif
"""]

#------------------------------------------------------------------------------------

type_import_utility_code = [
"""
static PyTypeObject *__Pyx_ImportType(char *module_name, char *class_name, long size);  /*proto*/
""","""
#ifndef __PYX_HAVE_RT_ImportType
#define __PYX_HAVE_RT_ImportType
static PyTypeObject *__Pyx_ImportType(char *module_name, char *class_name, 
	long size) 
{
	PyObject *py_module = 0;
	PyObject *result = 0;
	
	py_module = __Pyx_ImportModule(module_name);
	if (!py_module)
		goto bad;
	result = PyObject_GetAttrString(py_module, class_name);
	if (!result)
		goto bad;
	if (!PyType_Check(result)) {
		PyErr_Format(PyExc_TypeError, 
			"%s.%s is not a type object",
			module_name, class_name);
		goto bad;
	}
	if (((PyTypeObject *)result)->tp_basicsize != size) {
		PyErr_Format(PyExc_ValueError, 
			"%s.%s does not appear to be the correct type object",
			module_name, class_name);
		goto bad;
	}
	return (PyTypeObject *)result;
bad:
	Py_XDECREF(result);
	return 0;
}
#endif
"""]

#------------------------------------------------------------------------------------

function_export_utility_code = [
"""
static int __Pyx_ExportFunction(char *n, void *f, char *s); /*proto*/
""",r"""
static int __Pyx_ExportFunction(char *n, void *f, char *s) {
	PyObject *d = 0;
	PyObject *p = 0;
	d = PyObject_GetAttrString(%(MODULE)s, "%(API)s");
	if (!d) {
		PyErr_Clear();
		d = PyDict_New();
		if (!d)
			goto bad;
		Py_INCREF(d);
		if (PyModule_AddObject(%(MODULE)s, "%(API)s", d) < 0)
			goto bad;
	}
	p = PyCObject_FromVoidPtrAndDesc(f, s, 0);
	if (!p)
		goto bad;
	if (PyDict_SetItemString(d, n, p) < 0)
		goto bad;
	Py_DECREF(d);
	return 0;
bad:
	Py_XDECREF(p);
	Py_XDECREF(d);
	return -1;
}
""" % {'MODULE': Naming.module_cname, 'API': Naming.api_name}]

#------------------------------------------------------------------------------------

function_import_utility_code = [
"""
static int __Pyx_ImportFunction(PyObject *module, char *funcname, void **f, char *sig); /*proto*/
""","""
#ifndef __PYX_HAVE_RT_ImportFunction
#define __PYX_HAVE_RT_ImportFunction
static int __Pyx_ImportFunction(PyObject *module, char *funcname, void **f, char *sig) {
	PyObject *d = 0;
	PyObject *cobj = 0;
	char *desc;
	
	d = PyObject_GetAttrString(module, "%(API)s");
	if (!d)
		goto bad;
	cobj = PyDict_GetItemString(d, funcname);
	if (!cobj) {
		PyErr_Format(PyExc_ImportError,
			"%%s does not export expected C function %%s",
				PyModule_GetName(module), funcname);
		goto bad;
	}
	desc = (char *)PyCObject_GetDesc(cobj);
	if (!desc)
		goto bad;
	if (strcmp(desc, sig) != 0) {
		PyErr_Format(PyExc_TypeError,
			"C function %%s.%%s has wrong signature (expected %%s, got %%s)",
				PyModule_GetName(module), funcname, sig, desc);
		goto bad;
	}
	*f = PyCObject_AsVoidPtr(cobj);
	Py_DECREF(d);
	return 0;
bad:
	Py_XDECREF(d);
	return -1;
}
#endif
""" % dict(API = Naming.api_name)]