C++ code reorganization, split into different files to make cppclass.py smaller.
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Gustavo J. A. M. Carneiro committed
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@@ -0,0 +1,148 @@
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"""
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Wraps C++ class instance/static attributes.
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"""
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from typehandlers.base import ForwardWrapperBase
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from typehandlers import codesink
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import settings
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class CppInstanceAttributeGetter(ForwardWrapperBase):
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'''
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A getter for a C++ instance attribute.
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'''
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def __init__(self, value_type, class_, attribute_name):
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"""
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value_type -- a ReturnValue object handling the value type;
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class_ -- the class (CppClass object)
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attribute_name -- name of attribute
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"""
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super(CppInstanceAttributeGetter, self).__init__(
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value_type, [], "return NULL;", "return NULL;", no_c_retval=True)
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self.class_ = class_
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self.attribute_name = attribute_name
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self.c_function_name = "_wrap_%s__get_%s" % (self.class_.pystruct,
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self.attribute_name)
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value_type.value = "self->obj->%s" % self.attribute_name
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def generate_call(self):
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"virtual method implementation; do not call"
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pass
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def generate(self, code_sink):
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"""
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code_sink -- a CodeSink instance that will receive the generated code
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"""
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tmp_sink = codesink.MemoryCodeSink()
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self.generate_body(tmp_sink)
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code_sink.writeln("static PyObject* %s(%s *self)" % (self.c_function_name,
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self.class_.pystruct))
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code_sink.writeln('{')
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code_sink.indent()
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tmp_sink.flush_to(code_sink)
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code_sink.unindent()
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code_sink.writeln('}')
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class CppStaticAttributeGetter(ForwardWrapperBase):
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'''
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A getter for a C++ class static attribute.
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'''
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def __init__(self, value_type, class_, attribute_name):
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"""
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value_type -- a ReturnValue object handling the value type;
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c_value_expression -- C value expression
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"""
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super(CppStaticAttributeGetter, self).__init__(
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value_type, [], "return NULL;", "return NULL;", no_c_retval=True)
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self.class_ = class_
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self.attribute_name = attribute_name
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self.c_function_name = "_wrap_%s__get_%s" % (self.class_.pystruct,
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self.attribute_name)
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def generate_call(self):
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"virtual method implementation; do not call"
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self.before_call.write_code(
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"#define retval %s::%s" % (self.class_.name, self.attribute_name))
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self.before_call.add_cleanup_code('#undef retval')
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def generate(self, code_sink):
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"""
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code_sink -- a CodeSink instance that will receive the generated code
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"""
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tmp_sink = codesink.MemoryCodeSink()
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self.generate_body(tmp_sink)
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code_sink.writeln("static PyObject* %s(void)" % self.c_function_name)
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code_sink.writeln('{')
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code_sink.indent()
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tmp_sink.flush_to(code_sink)
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code_sink.unindent()
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code_sink.writeln('}')
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class PyDescrGenerator(object):
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"""
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Class that generates a Python descriptor type.
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"""
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def __init__(self, name, descr_get, descr_set):
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self.name = name
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self.descr_get = descr_get
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self.descr_set = descr_set
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prefix = settings.name_prefix.capitalize()
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self.pytypestruct = "Py%s%s_Type" % (prefix, self.name)
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def generate(self, code_sink):
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code_sink.writeln('''
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PyTypeObject %(pytypestruct)s = {
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PyObject_HEAD_INIT(NULL)
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0, /* ob_size */
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"%(name)s", /* tp_name */
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0, /* tp_basicsize */
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0, /* tp_itemsize */
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0, /* tp_dealloc */
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0, /* tp_print */
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0, /* tp_getattr */
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0, /* tp_setattr */
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0, /* tp_compare */
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0, /* tp_repr */
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0, /* tp_as_number */
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0, /* tp_as_sequence */
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0, /* tp_as_mapping */
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0, /* tp_hash */
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0, /* tp_call */
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0, /* tp_str */
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0, /* tp_getattro */
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0, /* tp_setattro */
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0, /* tp_as_buffer */
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Py_TPFLAGS_DEFAULT, /* tp_flags */
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0, /* tp_doc */
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0, /* tp_traverse */
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0, /* tp_clear */
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0, /* tp_richcompare */
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0, /* tp_weaklistoffset */
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0, /* tp_iter */
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0, /* tp_iternext */
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0, /* tp_methods */
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0, /* tp_members */
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0, /* tp_getset */
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0, /* tp_base */
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0, /* tp_dict */
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(descrgetfunc) %(descr_get)s, /* tp_descr_get */
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(descrsetfunc) %(descr_set)s, /* tp_descr_set */
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0, /* tp_dictoffset */
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0, /* tp_init */
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0, /* tp_alloc */
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0, /* tp_new */
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0, /* tp_free */
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0, /* tp_is_gc */
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0, /* tp_bases */
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0, /* tp_mro */
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0, /* tp_cache */
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0, /* tp_subclasses */
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0, /* tp_weaklist */
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0 /* tp_del */
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};
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''' % dict(pytypestruct=self.pytypestruct, name=self.name,
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descr_get=(self.descr_get or '0'),
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descr_set=(self.descr_set or '0')))
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