Author: Ronan Lamy <ronan.l...@gmail.com>
Branch: py3.5
Changeset: r89644:573fc5d78d57
Date: 2017-01-17 18:44 +0000
http://bitbucket.org/pypy/pypy/changeset/573fc5d78d57/

Log:    hg merge default

diff too long, truncating to 2000 out of 2639 lines

diff --git a/pypy/doc/whatsnew-head.rst b/pypy/doc/whatsnew-head.rst
--- a/pypy/doc/whatsnew-head.rst
+++ b/pypy/doc/whatsnew-head.rst
@@ -128,3 +128,9 @@
 Also fix for c-extension type that calls ``tp_hash`` during initialization
 (str, unicode types), and fix instantiating c-extension types from built-in
 classes by enforcing an order of instaniation.
+
+.. branch: rffi-parser-2
+
+rffi structures in cpyext can now be created by parsing simple C headers.
+Additionally, the cts object that holds the parsed information can act like
+cffi's ffi objects, with the methods cts.cast() and cts.gettype().
diff --git a/pypy/interpreter/typedef.py b/pypy/interpreter/typedef.py
--- a/pypy/interpreter/typedef.py
+++ b/pypy/interpreter/typedef.py
@@ -251,12 +251,11 @@
 
 class GetSetProperty(W_Root):
     _immutable_fields_ = ["fget", "fset", "fdel"]
-    name = '<generic property>'
     w_objclass = None
 
     @specialize.arg(7)
     def __init__(self, fget, fset=None, fdel=None, doc=None,
-                 cls=None, use_closure=False, tag=None):
+                 cls=None, use_closure=False, tag=None, name=None):
         objclass_getter, cls = make_objclass_getter(tag, fget, cls)
         fget = make_descr_typecheck_wrapper((tag, 0), fget,
                                             cls=cls, use_closure=use_closure)
@@ -264,9 +263,11 @@
                                             cls=cls, use_closure=use_closure)
         fdel = make_descr_typecheck_wrapper((tag, 2), fdel,
                                             cls=cls, use_closure=use_closure)
-        self._init(fget, fset, fdel, doc, cls, objclass_getter, use_closure)
+        self._init(fget, fset, fdel, doc, cls, objclass_getter, use_closure,
+                   name)
 
-    def _init(self, fget, fset, fdel, doc, cls, objclass_getter, use_closure):
+    def _init(self, fget, fset, fdel, doc, cls, objclass_getter, use_closure,
+              name):
         self.fget = fget
         self.fset = fset
         self.fdel = fdel
@@ -275,13 +276,13 @@
         self.qualname = None
         self.objclass_getter = objclass_getter
         self.use_closure = use_closure
+        self.name = name if name is not None else '<generic property>'
 
     def copy_for_type(self, w_objclass):
         if self.objclass_getter is None:
             new = instantiate(GetSetProperty)
             new._init(self.fget, self.fset, self.fdel, self.doc, self.reqcls,
-                      None, self.use_closure)
-            new.name = self.name
+                      None, self.use_closure, self.name)
             new.w_objclass = w_objclass
             return new
         else:
diff --git a/pypy/module/cpyext/api.py b/pypy/module/cpyext/api.py
--- a/pypy/module/cpyext/api.py
+++ b/pypy/module/cpyext/api.py
@@ -40,37 +40,35 @@
 from rpython.rlib import rthread
 from rpython.rlib.debug import fatalerror_notb
 from pypy.objspace.std.typeobject import W_TypeObject, find_best_base
+from pypy.module.cpyext.cparser import CTypeSpace
 
 DEBUG_WRAPPER = True
 
-# update these for other platforms
-Py_ssize_t = lltype.Typedef(rffi.SSIZE_T, 'Py_ssize_t')
-Py_ssize_tP = rffi.CArrayPtr(Py_ssize_t)
-size_t = rffi.ULONG
-ADDR = lltype.Signed
-
 pypydir = py.path.local(pypydir)
 include_dir = pypydir / 'module' / 'cpyext' / 'include'
+parse_dir = pypydir / 'module' / 'cpyext' / 'parse'
 source_dir = pypydir / 'module' / 'cpyext' / 'src'
 translator_c_dir = py.path.local(cdir)
 include_dirs = [
     include_dir,
+    parse_dir,
     translator_c_dir,
     udir,
     ]
 
-class CConfig:
-    _compilation_info_ = ExternalCompilationInfo(
+configure_eci = ExternalCompilationInfo(
         include_dirs=include_dirs,
         includes=['Python.h', 'stdarg.h', 'structmember.h'],
-        compile_extra=['-DPy_BUILD_CORE'],
-        )
+        compile_extra=['-DPy_BUILD_CORE'])
+
+class CConfig:
+    _compilation_info_ = configure_eci
 
 class CConfig2:
-    _compilation_info_ = CConfig._compilation_info_
+    _compilation_info_ = configure_eci
 
 class CConfig_constants:
-    _compilation_info_ = CConfig._compilation_info_
+    _compilation_info_ = configure_eci
 
 CONST_STRING = lltype.Ptr(lltype.Array(lltype.Char,
                                        hints={'nolength': True}),
@@ -117,6 +115,9 @@
     return is_valid_fd(c_fileno(fp))
 
 pypy_decl = 'pypy_decl.h'
+udir.join(pypy_decl).write("/* Will be filled later */\n")
+udir.join('pypy_structmember_decl.h').write("/* Will be filled later */\n")
+udir.join('pypy_macros.h').write("/* Will be filled later */\n")
 
 constant_names = """
 Py_TPFLAGS_READY Py_TPFLAGS_READYING Py_TPFLAGS_HAVE_GETCHARBUFFER
@@ -129,9 +130,6 @@
 """.split()
 for name in constant_names:
     setattr(CConfig_constants, name, rffi_platform.ConstantInteger(name))
-udir.join(pypy_decl).write("/* Will be filled later */\n")
-udir.join('pypy_structmember_decl.h').write("/* Will be filled later */\n")
-udir.join('pypy_macros.h').write("/* Will be filled later */\n")
 globals().update(rffi_platform.configure(CConfig_constants))
 
 def _copy_header_files(headers, dstdir):
@@ -145,12 +143,14 @@
         target.chmod(0444) # make the file read-only, to make sure that nobody
                            # edits it by mistake
 
-def copy_header_files(dstdir, copy_numpy_headers):
+def copy_header_files(cts, dstdir, copy_numpy_headers):
     # XXX: 20 lines of code to recursively copy a directory, really??
     assert dstdir.check(dir=True)
     headers = include_dir.listdir('*.h') + include_dir.listdir('*.inl')
     for name in ["pypy_macros.h"] + FUNCTIONS_BY_HEADER.keys():
         headers.append(udir.join(name))
+    for path in cts.parsed_headers:
+        headers.append(path)
     _copy_header_files(headers, dstdir)
 
     if copy_numpy_headers:
@@ -251,13 +251,15 @@
 
 class ApiFunction(object):
     def __init__(self, argtypes, restype, callable, error=CANNOT_FAIL,
-                 c_name=None, gil=None, result_borrowed=False, 
result_is_ll=False):
+                 c_name=None, cdecl=None, gil=None,
+                 result_borrowed=False, result_is_ll=False):
         self.argtypes = argtypes
         self.restype = restype
         self.functype = lltype.Ptr(lltype.FuncType(argtypes, restype))
         self.callable = callable
         self.error_value = error
         self.c_name = c_name
+        self.cdecl = cdecl
 
         # extract the signature from the (CPython-level) code object
         from pypy.interpreter import pycode
@@ -272,8 +274,6 @@
         self.gil = gil
         self.result_borrowed = result_borrowed
         self.result_is_ll = result_is_ll
-        if result_is_ll:    # means 'returns a low-level PyObject pointer'
-            assert is_PyObject(restype)
         #
         def get_llhelper(space):
             return llhelper(self.functype, self.get_wrapper(space))
@@ -381,6 +381,8 @@
         return unwrapper
 
     def get_c_restype(self, c_writer):
+        if self.cdecl:
+            return self.cdecl.split(self.c_name)[0].strip()
         return c_writer.gettype(self.restype).replace('@', '').strip()
 
     def get_c_args(self, c_writer):
@@ -480,6 +482,20 @@
         return unwrapper
     return decorate
 
+def api_decl(cdecl, cts, error=_NOT_SPECIFIED, header=DEFAULT_HEADER):
+    def decorate(func):
+        func._always_inline_ = 'try'
+        name, FUNC = cts.parse_func(cdecl)
+        api_function = ApiFunction(
+            FUNC.ARGS, FUNC.RESULT, func,
+            error=_compute_error(error, FUNC.RESULT), cdecl=cdecl)
+        FUNCTIONS_BY_HEADER[header][name] = api_function
+        unwrapper = api_function.get_unwrapper()
+        unwrapper.func = func
+        unwrapper.api_func = api_function
+        return unwrapper
+    return decorate
+
 def slot_function(argtypes, restype, error=_NOT_SPECIFIED):
     def decorate(func):
         func._always_inline_ = 'try'
@@ -658,41 +674,31 @@
                              % (cpyname, ))
 build_exported_objects()
 
+cts = CTypeSpace(headers=['sys/types.h', 'stdarg.h', 'stdio.h'])
+cts.parse_header(parse_dir / 'cpyext_object.h')
+
+Py_ssize_t = cts.gettype('Py_ssize_t')
+Py_ssize_tP = cts.gettype('Py_ssize_t *')
+size_t = rffi.ULONG
+ADDR = lltype.Signed
+
 # Note: as a special case, "PyObject" is the pointer type in RPython,
 # corresponding to "PyObject *" in C.  We do that only for PyObject.
 # For example, "PyTypeObject" is the struct type even in RPython.
-PyTypeObject = lltype.ForwardReference()
-PyTypeObjectPtr = lltype.Ptr(PyTypeObject)
-PyObjectStruct = lltype.ForwardReference()
-PyObject = lltype.Ptr(PyObjectStruct)
+PyTypeObject = cts.gettype('PyTypeObject')
+PyTypeObjectPtr = cts.gettype('PyTypeObject *')
+PyObjectStruct = cts.gettype('PyObject')
+PyObject = cts.gettype('PyObject *')
 PyObjectFields = (("ob_refcnt", lltype.Signed),
                   ("ob_pypy_link", lltype.Signed),
                   ("ob_type", PyTypeObjectPtr))
 PyVarObjectFields = PyObjectFields + (("ob_size", Py_ssize_t), )
-cpython_struct('PyObject', PyObjectFields, PyObjectStruct)
-PyVarObjectStruct = cpython_struct("PyVarObject", PyVarObjectFields)
-PyVarObject = lltype.Ptr(PyVarObjectStruct)
+PyVarObjectStruct = cts.gettype('PyVarObject')
+PyVarObject = cts.gettype('PyVarObject *')
 
-Py_buffer = cpython_struct(
-    "Py_buffer", (
-        ('buf', rffi.VOIDP),
-        ('obj', PyObject),
-        ('len', Py_ssize_t),
-        ('itemsize', Py_ssize_t),
+Py_buffer = cts.gettype('Py_buffer')
+Py_bufferP = cts.gettype('Py_buffer *')
 
-        ('readonly', rffi.INT_real),
-        ('ndim', rffi.INT_real),
-        ('format', rffi.CCHARP),
-        ('shape', Py_ssize_tP),
-        ('strides', Py_ssize_tP),
-        ('suboffsets', Py_ssize_tP),
-        ('_format', rffi.CFixedArray(rffi.UCHAR, Py_MAX_FMT)),
-        ('_shape', rffi.CFixedArray(Py_ssize_t, Py_MAX_NDIMS)),
-        ('_strides', rffi.CFixedArray(Py_ssize_t, Py_MAX_NDIMS)),
-        #('smalltable', rffi.CFixedArray(Py_ssize_t, 2)),
-        ('internal', rffi.VOIDP),
-))
-Py_bufferP = lltype.Ptr(Py_buffer)
 
 @specialize.memo()
 def is_PyObject(TYPE):
@@ -1415,7 +1421,7 @@
         include_lines.append('RPY_EXPORTED %s %s;\n' % (typ, name))
 
     lines.append('};\n')
-    eci2 = CConfig._compilation_info_.merge(ExternalCompilationInfo(
+    eci2 = configure_eci.merge(ExternalCompilationInfo(
         separate_module_sources = [''.join(lines)],
         post_include_bits = [''.join(include_lines)],
         ))
@@ -1433,7 +1439,7 @@
 
     setup_init_functions(eci, prefix)
     trunk_include = pypydir.dirpath() / 'include'
-    copy_header_files(trunk_include, use_micronumpy)
+    copy_header_files(cts, trunk_include, use_micronumpy)
 
 
 def _load_from_cffi(space, name, path, initptr):
diff --git a/pypy/module/cpyext/cparser.py b/pypy/module/cpyext/cparser.py
new file mode 100644
--- /dev/null
+++ b/pypy/module/cpyext/cparser.py
@@ -0,0 +1,879 @@
+from collections import OrderedDict
+from cffi import api, model
+from cffi.commontypes import COMMON_TYPES, resolve_common_type
+try:
+    from cffi import _pycparser as pycparser
+except ImportError:
+    import pycparser
+import weakref, re
+from rpython.translator.tool.cbuild import ExternalCompilationInfo
+from rpython.rlib.rfile import FILEP
+from rpython.rtyper.lltypesystem import rffi, lltype
+from rpython.rtyper.tool import rfficache, rffi_platform
+from rpython.flowspace.model import Constant, const
+from rpython.flowspace.specialcase import register_flow_sc
+from rpython.flowspace.flowcontext import FlowingError
+
+_r_comment = re.compile(r"/\*.*?\*/|//([^\n\\]|\\.)*?$",
+                        re.DOTALL | re.MULTILINE)
+_r_define = re.compile(r"^\s*#\s*define\s+([A-Za-z_][A-Za-z_0-9]*)"
+                        r"\b((?:[^\n\\]|\\.)*?)$",
+                        re.DOTALL | re.MULTILINE)
+_r_words = re.compile(r"\w+|\S")
+_parser_cache = None
+_r_int_literal = re.compile(r"-?0?x?[0-9a-f]+[lu]*$", re.IGNORECASE)
+_r_stdcall1 = re.compile(r"\b(__stdcall|WINAPI)\b")
+_r_stdcall2 = re.compile(r"[(]\s*(__stdcall|WINAPI)\b")
+_r_cdecl = re.compile(r"\b__cdecl\b")
+_r_star_const_space = re.compile(       # matches "* const "
+    r"[*]\s*((const|volatile|restrict)\b\s*)+")
+
+def _get_parser():
+    global _parser_cache
+    if _parser_cache is None:
+        _parser_cache = pycparser.CParser()
+    return _parser_cache
+
+def _preprocess(csource, macros):
+    # Remove comments.  NOTE: this only work because the cdef() section
+    # should not contain any string literal!
+    csource = _r_comment.sub(' ', csource)
+    # Remove the "#define FOO x" lines
+    for match in _r_define.finditer(csource):
+        macroname, macrovalue = match.groups()
+        macrovalue = macrovalue.replace('\\\n', '').strip()
+        macros[macroname] = macrovalue
+    csource = _r_define.sub('', csource)
+    #
+    # BIG HACK: replace WINAPI or __stdcall with "volatile const".
+    # It doesn't make sense for the return type of a function to be
+    # "volatile volatile const", so we abuse it to detect __stdcall...
+    # Hack number 2 is that "int(volatile *fptr)();" is not valid C
+    # syntax, so we place the "volatile" before the opening parenthesis.
+    csource = _r_stdcall2.sub(' volatile volatile const(', csource)
+    csource = _r_stdcall1.sub(' volatile volatile const ', csource)
+    csource = _r_cdecl.sub(' ', csource)
+
+    for name, value in reversed(macros.items()):
+        csource = re.sub(r'\b%s\b' % name, value, csource)
+
+    return csource, macros
+
+def _common_type_names(csource):
+    # Look in the source for what looks like usages of types from the
+    # list of common types.  A "usage" is approximated here as the
+    # appearance of the word, minus a "definition" of the type, which
+    # is the last word in a "typedef" statement.  Approximative only
+    # but should be fine for all the common types.
+    look_for_words = set(COMMON_TYPES)
+    look_for_words.add(';')
+    look_for_words.add(',')
+    look_for_words.add('(')
+    look_for_words.add(')')
+    look_for_words.add('typedef')
+    words_used = set()
+    is_typedef = False
+    paren = 0
+    previous_word = ''
+    for word in _r_words.findall(csource):
+        if word in look_for_words:
+            if word == ';':
+                if is_typedef:
+                    words_used.discard(previous_word)
+                    look_for_words.discard(previous_word)
+                    is_typedef = False
+            elif word == 'typedef':
+                is_typedef = True
+                paren = 0
+            elif word == '(':
+                paren += 1
+            elif word == ')':
+                paren -= 1
+            elif word == ',':
+                if is_typedef and paren == 0:
+                    words_used.discard(previous_word)
+                    look_for_words.discard(previous_word)
+            else:   # word in COMMON_TYPES
+                words_used.add(word)
+        previous_word = word
+    return words_used
+
+
+class Parser(object):
+
+    def __init__(self):
+        self._declarations = {}
+        self._included_declarations = set()
+        self._anonymous_counter = 0
+        self._structnode2type = weakref.WeakKeyDictionary()
+        self._options = {}
+        self._int_constants = {}
+        self._recomplete = []
+        self._macros = OrderedDict()
+
+    def _parse(self, csource):
+        # modifies self._macros in-place
+        csource, macros = _preprocess(csource, self._macros)
+        # XXX: for more efficiency we would need to poke into the
+        # internals of CParser...  the following registers the
+        # typedefs, because their presence or absence influences the
+        # parsing itself (but what they are typedef'ed to plays no role)
+        ctn = _common_type_names(csource)
+        typenames = []
+        for name in sorted(self._declarations):
+            if name.startswith('typedef '):
+                name = name[8:]
+                typenames.append(name)
+                ctn.discard(name)
+        typenames += sorted(ctn)
+        #
+        csourcelines = ['typedef int %s;' % typename for typename in typenames]
+        csourcelines.append('typedef int __dotdotdot__;')
+        csourcelines.append(csource)
+        csource = '\n'.join(csourcelines)
+        try:
+            ast = _get_parser().parse(csource)
+        except pycparser.c_parser.ParseError as e:
+            self.convert_pycparser_error(e, csource)
+        # csource will be used to find buggy source text
+        return ast, macros, csource
+
+    def _convert_pycparser_error(self, e, csource):
+        # xxx look for ":NUM:" at the start of str(e) and try to interpret
+        # it as a line number
+        line = None
+        msg = str(e)
+        if msg.startswith(':') and ':' in msg[1:]:
+            linenum = msg[1:msg.find(':',1)]
+            if linenum.isdigit():
+                linenum = int(linenum, 10)
+                csourcelines = csource.splitlines()
+                if 1 <= linenum <= len(csourcelines):
+                    line = csourcelines[linenum-1]
+        return line
+
+    def convert_pycparser_error(self, e, csource):
+        line = self._convert_pycparser_error(e, csource)
+
+        msg = str(e)
+        if line:
+            msg = 'cannot parse "%s"\n%s' % (line.strip(), msg)
+        else:
+            msg = 'parse error\n%s' % (msg,)
+        raise api.CDefError(msg)
+
+    def parse(self, csource, override=False, packed=False, dllexport=False):
+        prev_options = self._options
+        try:
+            self._options = {'override': override,
+                             'packed': packed,
+                             'dllexport': dllexport}
+            self._internal_parse(csource)
+        finally:
+            self._options = prev_options
+
+    def _internal_parse(self, csource):
+        ast, macros, csource = self._parse(csource)
+        # add the macros
+        self._process_macros(macros)
+        # find the first "__dotdotdot__" and use that as a separator
+        # between the repeated typedefs and the real csource
+        iterator = iter(ast.ext)
+        for decl in iterator:
+            if decl.name == '__dotdotdot__':
+                break
+        #
+        try:
+            for decl in iterator:
+                if isinstance(decl, pycparser.c_ast.Decl):
+                    self._parse_decl(decl)
+                elif isinstance(decl, pycparser.c_ast.Typedef):
+                    if not decl.name:
+                        raise api.CDefError("typedef does not declare any 
name",
+                                            decl)
+                    quals = 0
+                    realtype, quals = self._get_type_and_quals(
+                        decl.type, name=decl.name, partial_length_ok=True)
+                    self._declare('typedef ' + decl.name, realtype, 
quals=quals)
+                elif decl.__class__.__name__ == 'Pragma':
+                    pass    # skip pragma, only in pycparser 2.15
+                else:
+                    raise api.CDefError("unrecognized construct", decl)
+        except api.FFIError as e:
+            msg = self._convert_pycparser_error(e, csource)
+            if msg:
+                e.args = (e.args[0] + "\n    *** Err: %s" % msg,)
+            raise
+
+    def _add_constants(self, key, val):
+        if key in self._int_constants:
+            if self._int_constants[key] == val:
+                return     # ignore identical double declarations
+            raise api.FFIError(
+                "multiple declarations of constant: %s" % (key,))
+        self._int_constants[key] = val
+
+    def _add_integer_constant(self, name, int_str):
+        int_str = int_str.lower().rstrip("ul")
+        neg = int_str.startswith('-')
+        if neg:
+            int_str = int_str[1:]
+        # "010" is not valid oct in py3
+        if (int_str.startswith("0") and int_str != '0'
+                and not int_str.startswith("0x")):
+            int_str = "0o" + int_str[1:]
+        pyvalue = int(int_str, 0)
+        if neg:
+            pyvalue = -pyvalue
+        self._add_constants(name, pyvalue)
+        self._declare('macro ' + name, pyvalue)
+
+    def _process_macros(self, macros):
+        for key, value in macros.items():
+            value = value.strip()
+            if _r_int_literal.match(value):
+                self._add_integer_constant(key, value)
+            else:
+                self._declare('macro ' + key, value)
+
+    def _declare_function(self, tp, quals, decl):
+        tp = self._get_type_pointer(tp, quals)
+        if self._options.get('dllexport'):
+            tag = 'dllexport_python '
+        else:
+            tag = 'function '
+        self._declare(tag + decl.name, tp)
+
+    def _parse_decl(self, decl):
+        node = decl.type
+        if isinstance(node, pycparser.c_ast.FuncDecl):
+            tp, quals = self._get_type_and_quals(node, name=decl.name)
+            assert isinstance(tp, model.RawFunctionType)
+            self._declare_function(tp, quals, decl)
+        else:
+            if isinstance(node, pycparser.c_ast.Struct):
+                self._get_struct_union_enum_type('struct', node)
+            elif isinstance(node, pycparser.c_ast.Union):
+                self._get_struct_union_enum_type('union', node)
+            elif isinstance(node, pycparser.c_ast.Enum):
+                self._get_struct_union_enum_type('enum', node)
+            elif not decl.name:
+                raise api.CDefError("construct does not declare any variable",
+                                    decl)
+            #
+            if decl.name:
+                tp, quals = self._get_type_and_quals(node,
+                                                     partial_length_ok=True)
+                if tp.is_raw_function:
+                    self._declare_function(tp, quals, decl)
+                elif (tp.is_integer_type() and
+                        hasattr(decl, 'init') and
+                        hasattr(decl.init, 'value') and
+                        _r_int_literal.match(decl.init.value)):
+                    self._add_integer_constant(decl.name, decl.init.value)
+                elif (tp.is_integer_type() and
+                        isinstance(decl.init, pycparser.c_ast.UnaryOp) and
+                        decl.init.op == '-' and
+                        hasattr(decl.init.expr, 'value') and
+                        _r_int_literal.match(decl.init.expr.value)):
+                    self._add_integer_constant(decl.name,
+                                               '-' + decl.init.expr.value)
+                else:
+                    if (quals & model.Q_CONST) and not tp.is_array_type:
+                        self._declare('constant ' + decl.name, tp, quals=quals)
+                    else:
+                        self._declare('variable ' + decl.name, tp, quals=quals)
+
+    def parse_type(self, cdecl):
+        return self.parse_type_and_quals(cdecl)[0]
+
+    def parse_type_and_quals(self, cdecl):
+        ast, _, _ = self._parse('void __dummy(\n%s\n);' % cdecl)
+        exprnode = ast.ext[-1].type.args.params[0]
+        if isinstance(exprnode, pycparser.c_ast.ID):
+            raise api.CDefError("unknown identifier '%s'" % (exprnode.name,))
+        return self._get_type_and_quals(exprnode.type)
+
+    def _declare(self, name, obj, included=False, quals=0):
+        if name in self._declarations:
+            prevobj, prevquals = self._declarations[name]
+            if prevobj is obj and prevquals == quals:
+                return
+        self._declarations[name] = (obj, quals)
+        if included:
+            self._included_declarations.add(obj)
+
+    def _extract_quals(self, type):
+        quals = 0
+        if isinstance(type, (pycparser.c_ast.TypeDecl,
+                             pycparser.c_ast.PtrDecl)):
+            if 'const' in type.quals:
+                quals |= model.Q_CONST
+            if 'volatile' in type.quals:
+                quals |= model.Q_VOLATILE
+            if 'restrict' in type.quals:
+                quals |= model.Q_RESTRICT
+        return quals
+
+    def _get_type_pointer(self, type, quals, declname=None):
+        if isinstance(type, model.RawFunctionType):
+            return type.as_function_pointer()
+        if (isinstance(type, model.StructOrUnionOrEnum) and
+                type.name.startswith('$') and type.name[1:].isdigit() and
+                type.forcename is None and declname is not None):
+            return model.NamedPointerType(type, declname, quals)
+        return model.PointerType(type, quals)
+
+    def _get_type_and_quals(self, typenode, name=None, 
partial_length_ok=False):
+        # first, dereference typedefs, if we have it already parsed, we're good
+        if (isinstance(typenode, pycparser.c_ast.TypeDecl) and
+            isinstance(typenode.type, pycparser.c_ast.IdentifierType) and
+            len(typenode.type.names) == 1 and
+            ('typedef ' + typenode.type.names[0]) in self._declarations):
+            tp, quals = self._declarations['typedef ' + typenode.type.names[0]]
+            quals |= self._extract_quals(typenode)
+            return tp, quals
+        #
+        if isinstance(typenode, pycparser.c_ast.ArrayDecl):
+            # array type
+            if typenode.dim is None:
+                length = None
+            else:
+                length = self._parse_constant(
+                    typenode.dim, partial_length_ok=partial_length_ok)
+            tp, quals = self._get_type_and_quals(typenode.type,
+                                partial_length_ok=partial_length_ok)
+            return model.ArrayType(tp, length), quals
+        #
+        if isinstance(typenode, pycparser.c_ast.PtrDecl):
+            # pointer type
+            itemtype, itemquals = self._get_type_and_quals(typenode.type)
+            tp = self._get_type_pointer(itemtype, itemquals, declname=name)
+            quals = self._extract_quals(typenode)
+            return tp, quals
+        #
+        if isinstance(typenode, pycparser.c_ast.TypeDecl):
+            quals = self._extract_quals(typenode)
+            type = typenode.type
+            if isinstance(type, pycparser.c_ast.IdentifierType):
+                # assume a primitive type.  get it from .names, but reduce
+                # synonyms to a single chosen combination
+                names = list(type.names)
+                if names != ['signed', 'char']:    # keep this unmodified
+                    prefixes = {}
+                    while names:
+                        name = names[0]
+                        if name in ('short', 'long', 'signed', 'unsigned'):
+                            prefixes[name] = prefixes.get(name, 0) + 1
+                            del names[0]
+                        else:
+                            break
+                    # ignore the 'signed' prefix below, and reorder the others
+                    newnames = []
+                    for prefix in ('unsigned', 'short', 'long'):
+                        for i in range(prefixes.get(prefix, 0)):
+                            newnames.append(prefix)
+                    if not names:
+                        names = ['int']    # implicitly
+                    if names == ['int']:   # but kill it if 'short' or 'long'
+                        if 'short' in prefixes or 'long' in prefixes:
+                            names = []
+                    names = newnames + names
+                ident = ' '.join(names)
+                if ident == 'void':
+                    return model.void_type, quals
+                tp0, quals0 = resolve_common_type(self, ident)
+                return tp0, (quals | quals0)
+            #
+            if isinstance(type, pycparser.c_ast.Struct):
+                # 'struct foobar'
+                tp = self._get_struct_union_enum_type('struct', type, name)
+                return tp, quals
+            #
+            if isinstance(type, pycparser.c_ast.Union):
+                # 'union foobar'
+                tp = self._get_struct_union_enum_type('union', type, name)
+                return tp, quals
+            #
+            if isinstance(type, pycparser.c_ast.Enum):
+                # 'enum foobar'
+                tp = self._get_struct_union_enum_type('enum', type, name)
+                return tp, quals
+        #
+        if isinstance(typenode, pycparser.c_ast.FuncDecl):
+            # a function type
+            return self._parse_function_type(typenode, name), 0
+        #
+        # nested anonymous structs or unions end up here
+        if isinstance(typenode, pycparser.c_ast.Struct):
+            return self._get_struct_union_enum_type('struct', typenode, name,
+                                                    nested=True), 0
+        if isinstance(typenode, pycparser.c_ast.Union):
+            return self._get_struct_union_enum_type('union', typenode, name,
+                                                    nested=True), 0
+        #
+        raise api.FFIError(":%d: bad or unsupported type declaration" %
+                typenode.coord.line)
+
+    def _parse_function_type(self, typenode, funcname=None):
+        params = list(getattr(typenode.args, 'params', []))
+        for i, arg in enumerate(params):
+            if not hasattr(arg, 'type'):
+                raise api.CDefError("%s arg %d: unknown type '%s'"
+                    " (if you meant to use the old C syntax of giving"
+                    " untyped arguments, it is not supported)"
+                    % (funcname or 'in expression', i + 1,
+                       getattr(arg, 'name', '?')))
+        ellipsis = (
+            len(params) > 0 and
+            isinstance(params[-1].type, pycparser.c_ast.TypeDecl) and
+            isinstance(params[-1].type.type,
+                       pycparser.c_ast.IdentifierType) and
+            params[-1].type.type.names == ['__dotdotdot__'])
+        if ellipsis:
+            params.pop()
+            if not params:
+                raise api.CDefError(
+                    "%s: a function with only '(...)' as argument"
+                    " is not correct C" % (funcname or 'in expression'))
+        args = [self._as_func_arg(*self._get_type_and_quals(argdeclnode.type))
+                for argdeclnode in params]
+        if not ellipsis and args == [model.void_type]:
+            args = []
+        result, quals = self._get_type_and_quals(typenode.type)
+        # the 'quals' on the result type are ignored.  HACK: we absure them
+        # to detect __stdcall functions: we textually replace "__stdcall"
+        # with "volatile volatile const" above.
+        abi = None
+        if hasattr(typenode.type, 'quals'): # else, probable syntax error 
anyway
+            if typenode.type.quals[-3:] == ['volatile', 'volatile', 'const']:
+                abi = '__stdcall'
+        return model.RawFunctionType(tuple(args), result, ellipsis, abi)
+
+    def _as_func_arg(self, type, quals):
+        if isinstance(type, model.ArrayType):
+            return model.PointerType(type.item, quals)
+        elif isinstance(type, model.RawFunctionType):
+            return type.as_function_pointer()
+        else:
+            return type
+
+    def _get_struct_union_enum_type(self, kind, type, name=None, nested=False):
+        # First, a level of caching on the exact 'type' node of the AST.
+        # This is obscure, but needed because pycparser "unrolls" declarations
+        # such as "typedef struct { } foo_t, *foo_p" and we end up with
+        # an AST that is not a tree, but a DAG, with the "type" node of the
+        # two branches foo_t and foo_p of the trees being the same node.
+        # It's a bit silly but detecting "DAG-ness" in the AST tree seems
+        # to be the only way to distinguish this case from two independent
+        # structs.  See test_struct_with_two_usages.
+        try:
+            return self._structnode2type[type]
+        except KeyError:
+            pass
+        #
+        # Note that this must handle parsing "struct foo" any number of
+        # times and always return the same StructType object.  Additionally,
+        # one of these times (not necessarily the first), the fields of
+        # the struct can be specified with "struct foo { ...fields... }".
+        # If no name is given, then we have to create a new anonymous struct
+        # with no caching; in this case, the fields are either specified
+        # right now or never.
+        #
+        force_name = name
+        name = type.name
+        #
+        # get the type or create it if needed
+        if name is None:
+            # 'force_name' is used to guess a more readable name for
+            # anonymous structs, for the common case "typedef struct { } foo".
+            if force_name is not None:
+                explicit_name = '$%s' % force_name
+            else:
+                self._anonymous_counter += 1
+                explicit_name = '$%d' % self._anonymous_counter
+            tp = None
+        else:
+            explicit_name = name
+            key = '%s %s' % (kind, name)
+            tp, _ = self._declarations.get(key, (None, None))
+        #
+        if tp is None:
+            if kind == 'struct':
+                tp = model.StructType(explicit_name, None, None, None)
+            elif kind == 'union':
+                tp = model.UnionType(explicit_name, None, None, None)
+            elif kind == 'enum':
+                tp = self._build_enum_type(explicit_name, type.values)
+            else:
+                raise AssertionError("kind = %r" % (kind,))
+            if name is not None:
+                self._declare(key, tp)
+        else:
+            if kind == 'enum' and type.values is not None:
+                raise NotImplementedError(
+                    "enum %s: the '{}' declaration should appear on the first "
+                    "time the enum is mentioned, not later" % explicit_name)
+        if not tp.forcename:
+            tp.force_the_name(force_name)
+        if tp.forcename and '$' in tp.name:
+            self._declare('anonymous %s' % tp.forcename, tp)
+        #
+        self._structnode2type[type] = tp
+        #
+        # enums: done here
+        if kind == 'enum':
+            return tp
+        #
+        # is there a 'type.decls'?  If yes, then this is the place in the
+        # C sources that declare the fields.  If no, then just return the
+        # existing type, possibly still incomplete.
+        if type.decls is None:
+            return tp
+        #
+        if tp.fldnames is not None:
+            raise api.CDefError("duplicate declaration of struct %s" % name)
+        fldnames = []
+        fldtypes = []
+        fldbitsize = []
+        fldquals = []
+        for decl in type.decls:
+            if decl.bitsize is None:
+                bitsize = -1
+            else:
+                bitsize = self._parse_constant(decl.bitsize)
+            self._partial_length = False
+            type, fqual = self._get_type_and_quals(decl.type,
+                                                   partial_length_ok=True)
+            if self._partial_length:
+                self._make_partial(tp, nested)
+            if isinstance(type, model.StructType) and type.partial:
+                self._make_partial(tp, nested)
+            fldnames.append(decl.name or '')
+            fldtypes.append(type)
+            fldbitsize.append(bitsize)
+            fldquals.append(fqual)
+        tp.fldnames = tuple(fldnames)
+        tp.fldtypes = tuple(fldtypes)
+        tp.fldbitsize = tuple(fldbitsize)
+        tp.fldquals = tuple(fldquals)
+        if fldbitsize != [-1] * len(fldbitsize):
+            if isinstance(tp, model.StructType) and tp.partial:
+                raise NotImplementedError("%s: using both bitfields and '...;'"
+                                          % (tp,))
+        tp.packed = self._options.get('packed')
+        if tp.completed:    # must be re-completed: it is not opaque any more
+            tp.completed = 0
+            self._recomplete.append(tp)
+        return tp
+
+    def _make_partial(self, tp, nested):
+        if not isinstance(tp, model.StructOrUnion):
+            raise api.CDefError("%s cannot be partial" % (tp,))
+        if not tp.has_c_name() and not nested:
+            raise NotImplementedError("%s is partial but has no C name" %(tp,))
+        tp.partial = True
+
+    def _parse_constant(self, exprnode, partial_length_ok=False):
+        # for now, limited to expressions that are an immediate number
+        # or positive/negative number
+        if isinstance(exprnode, pycparser.c_ast.Constant):
+            s = exprnode.value
+            if s.startswith('0'):
+                if s.startswith('0x') or s.startswith('0X'):
+                    return int(s, 16)
+                return int(s, 8)
+            elif '1' <= s[0] <= '9':
+                return int(s, 10)
+            elif s[0] == "'" and s[-1] == "'" and (
+                    len(s) == 3 or (len(s) == 4 and s[1] == "\\")):
+                return ord(s[-2])
+            else:
+                raise api.CDefError("invalid constant %r" % (s,))
+        #
+        if (isinstance(exprnode, pycparser.c_ast.UnaryOp) and
+                exprnode.op == '+'):
+            return self._parse_constant(exprnode.expr)
+        #
+        if (isinstance(exprnode, pycparser.c_ast.UnaryOp) and
+                exprnode.op == '-'):
+            return -self._parse_constant(exprnode.expr)
+        # load previously defined int constant
+        if (isinstance(exprnode, pycparser.c_ast.ID) and
+                exprnode.name in self._int_constants):
+            return self._int_constants[exprnode.name]
+        #
+        if (isinstance(exprnode, pycparser.c_ast.ID) and
+                    exprnode.name == '__dotdotdotarray__'):
+            if partial_length_ok:
+                self._partial_length = True
+                return '...'
+            raise api.FFIError(":%d: unsupported '[...]' here, cannot derive "
+                               "the actual array length in this context"
+                               % exprnode.coord.line)
+        #
+        raise api.FFIError(":%d: unsupported expression: expected a "
+                           "simple numeric constant" % exprnode.coord.line)
+
+    def _build_enum_type(self, explicit_name, decls):
+        if decls is not None:
+            partial = False
+            enumerators = []
+            enumvalues = []
+            nextenumvalue = 0
+            for enum in decls.enumerators:
+                if enum.value is not None:
+                    nextenumvalue = self._parse_constant(enum.value)
+                enumerators.append(enum.name)
+                enumvalues.append(nextenumvalue)
+                self._add_constants(enum.name, nextenumvalue)
+                nextenumvalue += 1
+            enumerators = tuple(enumerators)
+            enumvalues = tuple(enumvalues)
+            tp = model.EnumType(explicit_name, enumerators, enumvalues)
+            tp.partial = partial
+        else:   # opaque enum
+            tp = model.EnumType(explicit_name, (), ())
+        return tp
+
+    def include(self, other):
+        for name, (tp, quals) in other._declarations.items():
+            if name.startswith('anonymous $enum_$'):
+                continue   # fix for test_anonymous_enum_include
+            kind = name.split(' ', 1)[0]
+            if kind in ('struct', 'union', 'enum', 'anonymous', 'typedef', 
'macro'):
+                self._declare(name, tp, included=True, quals=quals)
+        for k, v in other._int_constants.items():
+            self._add_constants(k, v)
+        for k, v in other._macros.items():
+            self._macros[k] = v
+
+CNAME_TO_LLTYPE = {
+    'char': rffi.CHAR,
+    'double': rffi.DOUBLE, 'long double': rffi.LONGDOUBLE,
+    'float': rffi.FLOAT, 'FILE': FILEP.TO}
+
+def add_inttypes():
+    for name in rffi.TYPES:
+        if name.startswith('unsigned'):
+            rname = 'u' + name[9:]
+        else:
+            rname = name
+        rname = rname.replace(' ', '').upper()
+        CNAME_TO_LLTYPE[name] = rfficache.platform.types[rname]
+
+add_inttypes()
+CNAME_TO_LLTYPE['int'] = rffi.INT_real
+
+def cname_to_lltype(name):
+    return CNAME_TO_LLTYPE[name]
+
+class DelayedStruct(object):
+    def __init__(self, name, fields, TYPE):
+        self.struct_name = name
+        self.type_name = None
+        self.fields = fields
+        self.TYPE = TYPE
+
+    def get_type_name(self):
+        if self.type_name is not None:
+            return self.type_name
+        elif not self.struct_name.startswith('$'):
+            return 'struct %s' % self.struct_name
+        else:
+            raise ValueError('Anonymous struct')
+
+    def __repr__(self):
+        return "<struct {struct_name}>".format(**vars(self))
+
+
+class CTypeSpace(object):
+    def __init__(self, parser=None, definitions=None, macros=None,
+                 headers=None, includes=None):
+        self.definitions = definitions if definitions is not None else {}
+        self.macros = macros if macros is not None else {}
+        self.structs = {}
+        self.ctx = parser if parser else Parser()
+        self.headers = headers if headers is not None else ['sys/types.h']
+        self.parsed_headers = []
+        self.sources = []
+        self._Config = type('Config', (object,), {})
+        self._TYPES = {}
+        self.includes = []
+        self.struct_typedefs = {}
+        self._handled = set()
+        self._frozen = False
+        if includes is not None:
+            for header in includes:
+                self.include(header)
+
+    def include(self, other):
+        self.ctx.include(other.ctx)
+        self.structs.update(other.structs)
+        self.includes.append(other)
+
+    def parse_source(self, source):
+        self.sources.append(source)
+        self.ctx.parse(source)
+        self.configure_types()
+
+    def parse_header(self, header_path):
+        self.headers.append(str(header_path))
+        self.parsed_headers.append(header_path)
+        self.ctx.parse(header_path.read())
+        self.configure_types()
+
+    def add_typedef(self, name, obj, quals):
+        assert name not in self.definitions
+        tp = self.convert_type(obj, quals)
+        if isinstance(tp, DelayedStruct):
+            if tp.type_name is None:
+                tp.type_name = name
+            tp = self.realize_struct(tp)
+        self.definitions[name] = tp
+
+    def add_macro(self, name, value):
+        assert name not in self.macros
+        self.macros[name] = value
+
+    def new_struct(self, obj):
+        if obj.name == '_IO_FILE':  # cffi weirdness
+            return cname_to_lltype('FILE')
+        struct = DelayedStruct(obj.name, None, lltype.ForwardReference())
+        # Cache it early, to avoid infinite recursion
+        self.structs[obj] = struct
+        if obj.fldtypes is not None:
+            struct.fields = zip(
+                obj.fldnames,
+                [self.convert_field(field) for field in obj.fldtypes])
+        return struct
+
+    def convert_field(self, obj):
+        tp = self.convert_type(obj)
+        if isinstance(tp, DelayedStruct):
+            tp = tp.TYPE
+        return tp
+
+    def realize_struct(self, struct):
+        type_name = struct.get_type_name()
+        configname = type_name.replace(' ', '__')
+        setattr(self._Config, configname,
+            rffi_platform.Struct(type_name, struct.fields))
+        self._TYPES[configname] = struct.TYPE
+        return struct.TYPE
+
+    def build_eci(self):
+        all_sources = []
+        for cts in self.includes:
+            all_sources.extend(cts.sources)
+        all_sources.extend(self.sources)
+        all_headers = self.headers
+        for x in self.includes:
+            for hdr in x.headers:
+                if hdr not in all_headers:
+                    all_headers.append(hdr)
+        return ExternalCompilationInfo(
+            post_include_bits=all_sources, includes=all_headers)
+
+    def configure_types(self):
+        for name, (obj, quals) in self.ctx._declarations.iteritems():
+            if obj in self.ctx._included_declarations:
+                continue
+            if name in self._handled:
+                continue
+            self._handled.add(name)
+            if name.startswith('typedef '):
+                name = name[8:]
+                self.add_typedef(name, obj, quals)
+            elif name.startswith('macro '):
+                name = name[6:]
+                self.add_macro(name, obj)
+        self._Config._compilation_info_ = self.build_eci()
+        for name, TYPE in rffi_platform.configure(self._Config).iteritems():
+            # hack: prevent the source from being pasted into common_header.h
+            del TYPE._hints['eci']
+            if name in self._TYPES:
+                self._TYPES[name].become(TYPE)
+                del self._TYPES[name]
+
+    def convert_type(self, obj, quals=0):
+        if isinstance(obj, model.PrimitiveType):
+            return cname_to_lltype(obj.name)
+        elif isinstance(obj, model.StructType):
+            if obj in self.structs:
+                return self.structs[obj]
+            return self.new_struct(obj)
+        elif isinstance(obj, model.PointerType):
+            TO = self.convert_type(obj.totype)
+            if TO is lltype.Void:
+                return rffi.VOIDP
+            elif isinstance(TO, DelayedStruct):
+                TO = TO.TYPE
+            if isinstance(TO, lltype.ContainerType):
+                return lltype.Ptr(TO)
+            else:
+                if obj.quals & model.Q_CONST:
+                    return lltype.Ptr(lltype.Array(
+                        TO, hints={'nolength': True, 'render_as_const': True}))
+                else:
+                    return rffi.CArrayPtr(TO)
+        elif isinstance(obj, model.FunctionPtrType):
+            if obj.ellipsis:
+                raise NotImplementedError
+            args = [self.convert_type(arg) for arg in obj.args]
+            res = self.convert_type(obj.result)
+            return lltype.Ptr(lltype.FuncType(args, res))
+        elif isinstance(obj, model.VoidType):
+            return lltype.Void
+        elif isinstance(obj, model.ArrayType):
+            return rffi.CFixedArray(self.convert_type(obj.item), obj.length)
+        else:
+            raise NotImplementedError
+
+    def gettype(self, cdecl):
+        obj = self.ctx.parse_type(cdecl)
+        result = self.convert_type(obj)
+        if isinstance(result, DelayedStruct):
+            result = result.TYPE
+        return result
+
+    def cast(self, cdecl, value):
+        return rffi.cast(self.gettype(cdecl), value)
+
+    def parse_func(self, cdecl):
+        cdecl = cdecl.strip()
+        if cdecl[-1] != ';':
+            cdecl += ';'
+        ast, _, _ = self.ctx._parse(cdecl)
+        decl = ast.ext[-1]
+        tp, quals = self.ctx._get_type_and_quals(decl.type, name=decl.name)
+        FUNCP = self.convert_type(tp.as_function_pointer())
+        return decl.name, FUNCP.TO
+
+    def _freeze_(self):
+        if self._frozen:
+            return True
+
+        @register_flow_sc(self.cast)
+        def sc_cast(ctx, v_decl, v_arg):
+            if not isinstance(v_decl, Constant):
+                raise FlowingError(
+                    "The first argument of cts.cast() must be a constant.")
+            TP = self.gettype(v_decl.value)
+            return ctx.appcall(rffi.cast, const(TP), v_arg)
+
+        @register_flow_sc(self.gettype)
+        def sc_gettype(ctx, v_decl):
+            if not isinstance(v_decl, Constant):
+                raise FlowingError(
+                    "The argument of cts.gettype() must be a constant.")
+            return const(self.gettype(v_decl.value))
+
+        self._frozen = True
+        return True
+
+
+def parse_source(source, includes=None, headers=None, configure_now=True):
+    cts = CTypeSpace(headers=headers, includes=includes)
+    cts.parse_source(source)
+    return cts
diff --git a/pypy/module/cpyext/include/descrobject.h 
b/pypy/module/cpyext/include/descrobject.h
--- a/pypy/module/cpyext/include/descrobject.h
+++ b/pypy/module/cpyext/include/descrobject.h
@@ -1,16 +1,5 @@
 #ifndef Py_DESCROBJECT_H
 #define Py_DESCROBJECT_H
-typedef PyObject *(*getter)(PyObject *, void *);
-typedef int (*setter)(PyObject *, PyObject *, void *);
-
-typedef struct PyGetSetDef {
-       char *name;
-       getter get;
-       setter set;
-       char *doc;
-       void *closure;
-} PyGetSetDef;
-
 
 #define PyDescr_COMMON \
     PyObject_HEAD \
diff --git a/pypy/module/cpyext/include/methodobject.h 
b/pypy/module/cpyext/include/methodobject.h
--- a/pypy/module/cpyext/include/methodobject.h
+++ b/pypy/module/cpyext/include/methodobject.h
@@ -7,20 +7,6 @@
 extern "C" {
 #endif
 
-typedef PyObject *(*PyCFunction)(PyObject *, PyObject *);
-typedef PyObject *(*PyCFunctionWithKeywords)(PyObject *, PyObject *,
-                                             PyObject *);
-typedef PyObject *(*PyNoArgsFunction)(PyObject *);
-
-struct PyMethodDef {
-    const char  *ml_name;   /* The name of the built-in function/method */
-    PyCFunction  ml_meth;   /* The C function that implements it */
-    int          ml_flags;  /* Combination of METH_xxx flags, which mostly
-                               describe the args expected by the C func */
-    const char  *ml_doc;    /* The __doc__ attribute, or NULL */
-};
-typedef struct PyMethodDef PyMethodDef;
-
 typedef struct
 {
     PyObject_HEAD
diff --git a/pypy/module/cpyext/include/object.h 
b/pypy/module/cpyext/include/object.h
--- a/pypy/module/cpyext/include/object.h
+++ b/pypy/module/cpyext/include/object.h
@@ -9,6 +9,7 @@
 
 #define Py_RETURN_NONE return Py_INCREF(Py_None), Py_None
 
+#include <cpyext_object.h>
 
 /*
 CPython has this for backwards compatibility with really old extensions, and 
now
@@ -16,29 +17,12 @@
 */
 #define staticforward static
 
-#define PyObject_HEAD  \
-    Py_ssize_t ob_refcnt;        \
-    Py_ssize_t ob_pypy_link;     \
-    struct _typeobject *ob_type;
-
-#define PyObject_VAR_HEAD              \
-       PyObject_HEAD                   \
-       Py_ssize_t ob_size; /* Number of items in variable part */
-
 #define PyObject_HEAD_INIT(type)       \
        1, 0, type,
 
 #define PyVarObject_HEAD_INIT(type, size)      \
        PyObject_HEAD_INIT(type) size,
 
-typedef struct _object {
-    PyObject_HEAD
-} PyObject;
-
-typedef struct {
-       PyObject_VAR_HEAD
-} PyVarObject;
-
 #ifdef PYPY_DEBUG_REFCOUNT
 /* Slow version, but useful for debugging */
 #define Py_INCREF(ob)   (Py_IncRef((PyObject *)(ob)))
@@ -94,65 +78,8 @@
 #define Py_GT 4
 #define Py_GE 5
 
-struct _typeobject;
-typedef void (*freefunc)(void *);
-typedef void (*destructor)(PyObject *);
-typedef int (*printfunc)(PyObject *, FILE *, int);
-typedef PyObject *(*getattrfunc)(PyObject *, char *);
-typedef PyObject *(*getattrofunc)(PyObject *, PyObject *);
-typedef int (*setattrfunc)(PyObject *, char *, PyObject *);
-typedef int (*setattrofunc)(PyObject *, PyObject *, PyObject *);
-typedef int (*cmpfunc)(PyObject *, PyObject *);
-typedef PyObject *(*reprfunc)(PyObject *);
-typedef long (*hashfunc)(PyObject *);
-typedef PyObject *(*richcmpfunc) (PyObject *, PyObject *, int);
-typedef PyObject *(*getiterfunc) (PyObject *);
-typedef PyObject *(*iternextfunc) (PyObject *);
-typedef PyObject *(*descrgetfunc) (PyObject *, PyObject *, PyObject *);
-typedef int (*descrsetfunc) (PyObject *, PyObject *, PyObject *);
-typedef int (*initproc)(PyObject *, PyObject *, PyObject *);
-typedef PyObject *(*newfunc)(struct _typeobject *, PyObject *, PyObject *);
-typedef PyObject *(*allocfunc)(struct _typeobject *, Py_ssize_t);
-
-typedef PyObject * (*unaryfunc)(PyObject *);
-typedef PyObject * (*binaryfunc)(PyObject *, PyObject *);
-typedef PyObject * (*ternaryfunc)(PyObject *, PyObject *, PyObject *);
-typedef int (*inquiry)(PyObject *);
-typedef Py_ssize_t (*lenfunc)(PyObject *);
-typedef PyObject *(*ssizeargfunc)(PyObject *, Py_ssize_t);
-typedef PyObject *(*ssizessizeargfunc)(PyObject *, Py_ssize_t, Py_ssize_t);
-typedef int(*ssizeobjargproc)(PyObject *, Py_ssize_t, PyObject *);
-typedef int(*ssizessizeobjargproc)(PyObject *, Py_ssize_t, Py_ssize_t, 
PyObject *);
-typedef int(*objobjargproc)(PyObject *, PyObject *, PyObject *);
-
 
 /* Py3k buffer interface, adapted for PyPy */
-#define Py_MAX_NDIMS 32
-#define Py_MAX_FMT 128
-typedef struct bufferinfo {
-    void *buf;
-    PyObject *obj;        /* owned reference */
-    Py_ssize_t len;
-    Py_ssize_t itemsize;  /* This is Py_ssize_t so it can be
-                             pointed to by strides in simple case.*/
-    int readonly;
-    int ndim;
-    char *format;
-    Py_ssize_t *shape;
-    Py_ssize_t *strides;
-    Py_ssize_t *suboffsets; /* alway NULL for app-level objects*/
-    unsigned char _format[Py_MAX_FMT];
-    Py_ssize_t _strides[Py_MAX_NDIMS];
-    Py_ssize_t _shape[Py_MAX_NDIMS];
-    /* static store for shape and strides of
-       mono-dimensional buffers. */
-    /* Py_ssize_t smalltable[2]; */
-    void *internal; /* always NULL for app-level objects */
-} Py_buffer;
-
-typedef int (*getbufferproc)(PyObject *, Py_buffer *, int);
-typedef void (*releasebufferproc)(PyObject *, Py_buffer *);
-
     /* Flags for getting buffers */
 #define PyBUF_SIMPLE 0
 #define PyBUF_WRITABLE 0x0001
@@ -184,180 +111,7 @@
 #define PyBUF_SHADOW 0x400
 /* end Py3k buffer interface */
 
-typedef int (*objobjproc)(PyObject *, PyObject *);
-typedef int (*visitproc)(PyObject *, void *);
-typedef int (*traverseproc)(PyObject *, visitproc, void *);
-
-
-typedef struct {
-    /* Number implementations must check *both*
-       arguments for proper type and implement the necessary conversions
-       in the slot functions themselves. */
-
-    binaryfunc nb_add;
-    binaryfunc nb_subtract;
-    binaryfunc nb_multiply;
-    binaryfunc nb_remainder;
-    binaryfunc nb_divmod;
-    ternaryfunc nb_power;
-    unaryfunc nb_negative;
-    unaryfunc nb_positive;
-    unaryfunc nb_absolute;
-    inquiry nb_bool;
-    unaryfunc nb_invert;
-    binaryfunc nb_lshift;
-    binaryfunc nb_rshift;
-    binaryfunc nb_and;
-    binaryfunc nb_xor;
-    binaryfunc nb_or;
-    unaryfunc nb_int;
-    void *nb_reserved;  /* the slot formerly known as nb_long */
-    unaryfunc nb_float;
-
-    binaryfunc nb_inplace_add;
-    binaryfunc nb_inplace_subtract;
-    binaryfunc nb_inplace_multiply;
-    binaryfunc nb_inplace_remainder;
-    ternaryfunc nb_inplace_power;
-    binaryfunc nb_inplace_lshift;
-    binaryfunc nb_inplace_rshift;
-    binaryfunc nb_inplace_and;
-    binaryfunc nb_inplace_xor;
-    binaryfunc nb_inplace_or;
-
-    binaryfunc nb_floor_divide;
-    binaryfunc nb_true_divide;
-    binaryfunc nb_inplace_floor_divide;
-    binaryfunc nb_inplace_true_divide;
-
-    unaryfunc nb_index;
-
-    binaryfunc nb_matrix_multiply;
-    binaryfunc nb_inplace_matrix_multiply;
-} PyNumberMethods;
-
-typedef struct {
-    lenfunc sq_length;
-    binaryfunc sq_concat;
-    ssizeargfunc sq_repeat;
-    ssizeargfunc sq_item;
-    void *was_sq_slice;
-    ssizeobjargproc sq_ass_item;
-    void *was_sq_ass_slice;
-    objobjproc sq_contains;
-
-    binaryfunc sq_inplace_concat;
-    ssizeargfunc sq_inplace_repeat;
-} PySequenceMethods;
-
-typedef struct {
-    lenfunc mp_length;
-    binaryfunc mp_subscript;
-    objobjargproc mp_ass_subscript;
-} PyMappingMethods;
-
-typedef struct {
-    unaryfunc am_await;
-    unaryfunc am_aiter;
-    unaryfunc am_anext;
-} PyAsyncMethods;
-
-typedef struct {
-     getbufferproc bf_getbuffer;
-     releasebufferproc bf_releasebuffer;
-} PyBufferProcs;
-
-
-typedef struct _typeobject {
-    PyObject_VAR_HEAD
-    const char *tp_name; /* For printing, in format "<module>.<name>" */
-    Py_ssize_t tp_basicsize, tp_itemsize; /* For allocation */
-
-    /* Methods to implement standard operations */
-
-    destructor tp_dealloc;
-    printfunc tp_print;
-    getattrfunc tp_getattr;
-    setattrfunc tp_setattr;
-    PyAsyncMethods *tp_as_async; /* formerly known as tp_compare (Python 2)
-                                    or tp_reserved (Python 3) */
-    reprfunc tp_repr;
-
-    /* Method suites for standard classes */
-
-    PyNumberMethods *tp_as_number;
-    PySequenceMethods *tp_as_sequence;
-    PyMappingMethods *tp_as_mapping;
-
-    /* More standard operations (here for binary compatibility) */
-
-    hashfunc tp_hash;
-    ternaryfunc tp_call;
-    reprfunc tp_str;
-    getattrofunc tp_getattro;
-    setattrofunc tp_setattro;
-
-    /* Functions to access object as input/output buffer */
-    PyBufferProcs *tp_as_buffer;
-
-    /* Flags to define presence of optional/expanded features */
-    long tp_flags;
-
-    const char *tp_doc; /* Documentation string */
-
-    /* Assigned meaning in release 2.0 */
-    /* call function for all accessible objects */
-    traverseproc tp_traverse;
-
-    /* delete references to contained objects */
-    inquiry tp_clear;
-
-    /* Assigned meaning in release 2.1 */
-    /* rich comparisons */
-    richcmpfunc tp_richcompare;
-
-    /* weak reference enabler */
-    Py_ssize_t tp_weaklistoffset;
-
-    /* Iterators */
-    getiterfunc tp_iter;
-    iternextfunc tp_iternext;
-
-    /* Attribute descriptor and subclassing stuff */
-    struct PyMethodDef *tp_methods;
-    struct PyMemberDef *tp_members;
-    struct PyGetSetDef *tp_getset;
-    struct _typeobject *tp_base;
-    PyObject *tp_dict;
-    descrgetfunc tp_descr_get;
-    descrsetfunc tp_descr_set;
-    Py_ssize_t tp_dictoffset;
-    initproc tp_init;
-    allocfunc tp_alloc;
-    newfunc tp_new;
-    freefunc tp_free; /* Low-level free-memory routine */
-    inquiry tp_is_gc; /* For PyObject_IS_GC */
-    PyObject *tp_bases;
-    PyObject *tp_mro; /* method resolution order */
-    PyObject *tp_cache;
-    PyObject *tp_subclasses;
-    PyObject *tp_weaklist;
-    destructor tp_del;
-
-    /* Type attribute cache version tag. Added in version 2.6 */
-    unsigned int tp_version_tag;
-
-    destructor tp_finalize;
-} PyTypeObject;
-
-typedef struct {
-    PyTypeObject ht_type;
-    PyNumberMethods as_number;
-    PyMappingMethods as_mapping;
-    PySequenceMethods as_sequence;
-    PyBufferProcs as_buffer;
-    PyObject *ht_name, *ht_slots;
-} PyHeapTypeObject;
+#include <cpyext_typeobject.h>
 
 #define PyObject_Bytes PyObject_Str
 
diff --git a/pypy/module/cpyext/include/structmember.h 
b/pypy/module/cpyext/include/structmember.h
--- a/pypy/module/cpyext/include/structmember.h
+++ b/pypy/module/cpyext/include/structmember.h
@@ -19,22 +19,6 @@
 #define offsetof(type, member) ( (int) & ((type*)0) -> member )
 #endif
 
-/* An array of memberlist structures defines the name, type and offset
-   of selected members of a C structure.  These can be read by
-   PyMember_Get() and set by PyMember_Set() (except if their READONLY flag
-   is set).  The array must be terminated with an entry whose name
-   pointer is NULL. */
-
-
-
-typedef struct PyMemberDef {
-    /* Current version, use this */
-    char *name;
-    int type;
-    Py_ssize_t offset;
-    int flags;
-    char *doc;
-} PyMemberDef;
 
 /* Types */
 #define T_SHORT         0
diff --git a/pypy/module/cpyext/methodobject.py 
b/pypy/module/cpyext/methodobject.py
--- a/pypy/module/cpyext/methodobject.py
+++ b/pypy/module/cpyext/methodobject.py
@@ -11,23 +11,13 @@
     CONST_STRING, METH_CLASS, METH_COEXIST, METH_KEYWORDS, METH_NOARGS, METH_O,
     METH_STATIC, METH_VARARGS, PyObject, PyObjectFields, bootstrap_function,
     build_type_checkers, cpython_api, cpython_struct, generic_cpy_call,
-    PyTypeObjectPtr, slot_function)
+    PyTypeObjectPtr, slot_function, cts, api_decl)
 from pypy.module.cpyext.pyobject import (
     Py_DecRef, from_ref, make_ref, as_pyobj, make_typedescr)
 
-PyCFunction_typedef = rffi.COpaquePtr(typedef='PyCFunction')
-PyCFunction = lltype.Ptr(lltype.FuncType([PyObject, PyObject], PyObject))
-PyCFunctionKwArgs = lltype.Ptr(lltype.FuncType([PyObject, PyObject, PyObject],
-                                               PyObject))
-
-PyMethodDef = cpython_struct(
-    'PyMethodDef',
-    [('ml_name', rffi.CONST_CCHARP),
-     ('ml_meth', PyCFunction_typedef),
-     ('ml_flags', rffi.INT_real),
-     ('ml_doc', rffi.CONST_CCHARP),
-     ])
-
+PyMethodDef = cts.gettype('PyMethodDef')
+PyCFunction = cts.gettype('PyCFunction')
+PyCFunctionKwArgs = cts.gettype('PyCFunctionWithKeywords')
 PyCFunctionObjectStruct = cpython_struct(
     'PyCFunctionObject',
     PyObjectFields + (
@@ -77,7 +67,7 @@
             raise oefmt(space.w_TypeError,
                         "%s() takes no keyword arguments", self.name)
 
-        func = rffi.cast(PyCFunction, self.ml.c_ml_meth)
+        func = self.ml.c_ml_meth
         length = space.int_w(space.len(w_args))
         if flags & METH_KEYWORDS:
             func = rffi.cast(PyCFunctionKwArgs, self.ml.c_ml_meth)
@@ -282,7 +272,7 @@
 def PyCFunction_NewEx(space, ml, w_self, w_name):
     return space.wrap(W_PyCFunctionObject(space, ml, w_self, w_name))
 
-@cpython_api([PyObject], PyCFunction_typedef)
+@api_decl("PyCFunction PyCFunction_GetFunction(PyObject *)", cts)
 def PyCFunction_GetFunction(space, w_obj):
     try:
         cfunction = space.interp_w(W_PyCFunctionObject, w_obj)
@@ -337,4 +327,3 @@
     if name == "__methods__":
         return space.newlist(method_list_w)
     raise OperationError(space.w_AttributeError, space.wrap(name))
-
diff --git a/pypy/module/cpyext/parse/cpyext_object.h 
b/pypy/module/cpyext/parse/cpyext_object.h
new file mode 100644
--- /dev/null
+++ b/pypy/module/cpyext/parse/cpyext_object.h
@@ -0,0 +1,282 @@
+
+typedef ssize_t Py_ssize_t;
+
+#define PyObject_HEAD  \
+    Py_ssize_t ob_refcnt;        \
+    Py_ssize_t ob_pypy_link;     \
+    struct _typeobject *ob_type;
+
+#define PyObject_VAR_HEAD              \
+       PyObject_HEAD                   \
+       Py_ssize_t ob_size; /* Number of items in variable part */
+
+typedef struct _object {
+    PyObject_HEAD
+} PyObject;
+
+typedef struct {
+       PyObject_VAR_HEAD
+} PyVarObject;
+
+struct _typeobject;
+typedef void (*freefunc)(void *);
+typedef void (*destructor)(PyObject *);
+typedef int (*printfunc)(PyObject *, FILE *, int);
+typedef PyObject *(*getattrfunc)(PyObject *, char *);
+typedef PyObject *(*getattrofunc)(PyObject *, PyObject *);
+typedef int (*setattrfunc)(PyObject *, char *, PyObject *);
+typedef int (*setattrofunc)(PyObject *, PyObject *, PyObject *);
+typedef int (*cmpfunc)(PyObject *, PyObject *);
+typedef PyObject *(*reprfunc)(PyObject *);
+typedef long (*hashfunc)(PyObject *);
+typedef PyObject *(*richcmpfunc) (PyObject *, PyObject *, int);
+typedef PyObject *(*getiterfunc) (PyObject *);
+typedef PyObject *(*iternextfunc) (PyObject *);
+typedef PyObject *(*descrgetfunc) (PyObject *, PyObject *, PyObject *);
+typedef int (*descrsetfunc) (PyObject *, PyObject *, PyObject *);
+typedef int (*initproc)(PyObject *, PyObject *, PyObject *);
+typedef PyObject *(*newfunc)(struct _typeobject *, PyObject *, PyObject *);
+typedef PyObject *(*allocfunc)(struct _typeobject *, Py_ssize_t);
+
+typedef PyObject * (*unaryfunc)(PyObject *);
+typedef PyObject * (*binaryfunc)(PyObject *, PyObject *);
+typedef PyObject * (*ternaryfunc)(PyObject *, PyObject *, PyObject *);
+typedef int (*inquiry)(PyObject *);
+typedef Py_ssize_t (*lenfunc)(PyObject *);
+typedef PyObject *(*ssizeargfunc)(PyObject *, Py_ssize_t);
+typedef PyObject *(*ssizessizeargfunc)(PyObject *, Py_ssize_t, Py_ssize_t);
+typedef int(*ssizeobjargproc)(PyObject *, Py_ssize_t, PyObject *);
+typedef int(*ssizessizeobjargproc)(PyObject *, Py_ssize_t, Py_ssize_t, 
PyObject *);
+typedef int(*objobjargproc)(PyObject *, PyObject *, PyObject *);
+
+
+/* Py3k buffer interface, adapted for PyPy */
+#define Py_MAX_NDIMS 32
+#define Py_MAX_FMT 128
+typedef struct bufferinfo {
+    void *buf;
+    PyObject *obj;        /* owned reference */
+    Py_ssize_t len;
+    Py_ssize_t itemsize;  /* This is Py_ssize_t so it can be
+                             pointed to by strides in simple case.*/
+    int readonly;
+    int ndim;
+    char *format;
+    Py_ssize_t *shape;
+    Py_ssize_t *strides;
+    Py_ssize_t *suboffsets; /* alway NULL for app-level objects*/
+    unsigned char _format[Py_MAX_FMT];
+    Py_ssize_t _strides[Py_MAX_NDIMS];
+    Py_ssize_t _shape[Py_MAX_NDIMS];
+    /* static store for shape and strides of
+       mono-dimensional buffers. */
+    /* Py_ssize_t smalltable[2]; */
+    void *internal; /* always NULL for app-level objects */
+} Py_buffer;
+
+typedef int (*getbufferproc)(PyObject *, Py_buffer *, int);
+typedef void (*releasebufferproc)(PyObject *, Py_buffer *);
+/* end Py3k buffer interface */
+
+typedef int (*objobjproc)(PyObject *, PyObject *);
+typedef int (*visitproc)(PyObject *, void *);
+typedef int (*traverseproc)(PyObject *, visitproc, void *);
+
+
+typedef struct {
+    /* Number implementations must check *both*
+       arguments for proper type and implement the necessary conversions
+       in the slot functions themselves. */
+
+    binaryfunc nb_add;
+    binaryfunc nb_subtract;
+    binaryfunc nb_multiply;
+    binaryfunc nb_remainder;
+    binaryfunc nb_divmod;
+    ternaryfunc nb_power;
+    unaryfunc nb_negative;
+    unaryfunc nb_positive;
+    unaryfunc nb_absolute;
+    inquiry nb_bool;
+    unaryfunc nb_invert;
+    binaryfunc nb_lshift;
+    binaryfunc nb_rshift;
+    binaryfunc nb_and;
+    binaryfunc nb_xor;
+    binaryfunc nb_or;
+    unaryfunc nb_int;
+    void *nb_reserved;  /* the slot formerly known as nb_long */
+    unaryfunc nb_float;
+
+    binaryfunc nb_inplace_add;
+    binaryfunc nb_inplace_subtract;
+    binaryfunc nb_inplace_multiply;
+    binaryfunc nb_inplace_remainder;
+    ternaryfunc nb_inplace_power;
+    binaryfunc nb_inplace_lshift;
+    binaryfunc nb_inplace_rshift;
+    binaryfunc nb_inplace_and;
+    binaryfunc nb_inplace_xor;
+    binaryfunc nb_inplace_or;
+
+    binaryfunc nb_floor_divide;
+    binaryfunc nb_true_divide;
+    binaryfunc nb_inplace_floor_divide;
+    binaryfunc nb_inplace_true_divide;
+
+    unaryfunc nb_index;
+
+    binaryfunc nb_matrix_multiply;
+    binaryfunc nb_inplace_matrix_multiply;
+} PyNumberMethods;
+
+typedef struct {
+    lenfunc sq_length;
+    binaryfunc sq_concat;
+    ssizeargfunc sq_repeat;
+    ssizeargfunc sq_item;
+    void *was_sq_slice;
+    ssizeobjargproc sq_ass_item;
+    void *was_sq_ass_slice;
+    objobjproc sq_contains;
+
+    binaryfunc sq_inplace_concat;
+    ssizeargfunc sq_inplace_repeat;
+} PySequenceMethods;
+
+typedef struct {
+    lenfunc mp_length;
+    binaryfunc mp_subscript;
+    objobjargproc mp_ass_subscript;
+} PyMappingMethods;
+
+typedef struct {
+    unaryfunc am_await;
+    unaryfunc am_aiter;
+    unaryfunc am_anext;
+} PyAsyncMethods;
+
+typedef struct {
+     getbufferproc bf_getbuffer;
+     releasebufferproc bf_releasebuffer;
+} PyBufferProcs;
+
+/* from descrobject.h */
+typedef PyObject *(*getter)(PyObject *, void *);
+typedef int (*setter)(PyObject *, PyObject *, void *);
+
+typedef struct PyGetSetDef {
+       char *name;
+       getter get;
+       setter set;
+       char *doc;
+       void *closure;
+} PyGetSetDef;
+
+/* from methodobject.h */
+typedef PyObject *(*PyCFunction)(PyObject *, PyObject *);
+typedef PyObject *(*PyCFunctionWithKeywords)(PyObject *, PyObject *,
+                                             PyObject *);
+typedef PyObject *(*PyNoArgsFunction)(PyObject *);
+
+struct PyMethodDef {
+    const char  *ml_name;   /* The name of the built-in function/method */
+    PyCFunction  ml_meth;   /* The C function that implements it */
+    int          ml_flags;  /* Combination of METH_xxx flags, which mostly
+                               describe the args expected by the C func */
+    const char  *ml_doc;    /* The __doc__ attribute, or NULL */
+};
+typedef struct PyMethodDef PyMethodDef;
+
+/* from structmember.h */
+typedef struct PyMemberDef {
+    /* Current version, use this */
+    char *name;
+    int type;
+    Py_ssize_t offset;
+    int flags;
+    char *doc;
+} PyMemberDef;
+
+
+typedef struct _typeobject {
+    PyObject_VAR_HEAD
+    const char *tp_name; /* For printing, in format "<module>.<name>" */
+    Py_ssize_t tp_basicsize, tp_itemsize; /* For allocation */
+
+    /* Methods to implement standard operations */
+
+    destructor tp_dealloc;
+    printfunc tp_print;
+    getattrfunc tp_getattr;
+    setattrfunc tp_setattr;
+    PyAsyncMethods *tp_as_async; /* formerly known as tp_compare (Python 2)
+                                    or tp_reserved (Python 3) */
+    reprfunc tp_repr;
+
+    /* Method suites for standard classes */
+
+    PyNumberMethods *tp_as_number;
+    PySequenceMethods *tp_as_sequence;
+    PyMappingMethods *tp_as_mapping;
+
+    /* More standard operations (here for binary compatibility) */
+
+    hashfunc tp_hash;
+    ternaryfunc tp_call;
+    reprfunc tp_str;
+    getattrofunc tp_getattro;
+    setattrofunc tp_setattro;
+
+    /* Functions to access object as input/output buffer */
+    PyBufferProcs *tp_as_buffer;
+
+    /* Flags to define presence of optional/expanded features */
+    long tp_flags;
+
+    const char *tp_doc; /* Documentation string */
+
+    /* Assigned meaning in release 2.0 */
+    /* call function for all accessible objects */
+    traverseproc tp_traverse;
+
+    /* delete references to contained objects */
+    inquiry tp_clear;
+
+    /* Assigned meaning in release 2.1 */
+    /* rich comparisons */
+    richcmpfunc tp_richcompare;
+
+    /* weak reference enabler */
+    Py_ssize_t tp_weaklistoffset;
+
+    /* Iterators */
+    getiterfunc tp_iter;
+    iternextfunc tp_iternext;
+
+    /* Attribute descriptor and subclassing stuff */
+    struct PyMethodDef *tp_methods;
+    struct PyMemberDef *tp_members;
+    struct PyGetSetDef *tp_getset;
+    struct _typeobject *tp_base;
+    PyObject *tp_dict;
+    descrgetfunc tp_descr_get;
+    descrsetfunc tp_descr_set;
+    Py_ssize_t tp_dictoffset;
+    initproc tp_init;
+    allocfunc tp_alloc;
+    newfunc tp_new;
+    freefunc tp_free; /* Low-level free-memory routine */
+    inquiry tp_is_gc; /* For PyObject_IS_GC */
+    PyObject *tp_bases;
+    PyObject *tp_mro; /* method resolution order */
+    PyObject *tp_cache;
+    PyObject *tp_subclasses;
+    PyObject *tp_weaklist;
+    destructor tp_del;
+
+    /* Type attribute cache version tag. Added in version 2.6 */
+    unsigned int tp_version_tag;
+
+    destructor tp_finalize;
+} PyTypeObject;
diff --git a/pypy/module/cpyext/parse/cpyext_typeobject.h 
b/pypy/module/cpyext/parse/cpyext_typeobject.h
new file mode 100644
--- /dev/null
+++ b/pypy/module/cpyext/parse/cpyext_typeobject.h
@@ -0,0 +1,9 @@
+typedef struct {
+    PyTypeObject ht_type;
+    PyNumberMethods as_number;
+    PyMappingMethods as_mapping;
+    PySequenceMethods as_sequence;
+    PyBufferProcs as_buffer;
+    PyObject *ht_name, *ht_slots;
+} PyHeapTypeObject;
+
diff --git a/pypy/module/cpyext/slotdefs.py b/pypy/module/cpyext/slotdefs.py
--- a/pypy/module/cpyext/slotdefs.py
+++ b/pypy/module/cpyext/slotdefs.py
@@ -7,9 +7,9 @@
 from rpython.rlib import rgc # Force registration of gc.collect
 from pypy.module.cpyext.api import (
     slot_function, generic_cpy_call, PyObject, Py_ssize_t,
-    pypy_decl, Py_buffer, Py_bufferP)
+    pypy_decl, Py_buffer, Py_bufferP, PyTypeObjectPtr)
 from pypy.module.cpyext.typeobjectdefs import (
-    unaryfunc, ternaryfunc, PyTypeObjectPtr, binaryfunc,
+    unaryfunc, ternaryfunc, binaryfunc,
     getattrfunc, getattrofunc, setattrofunc, lenfunc, ssizeargfunc, inquiry,
     ssizessizeargfunc, ssizeobjargproc, iternextfunc, initproc, richcmpfunc,
     cmpfunc, hashfunc, descrgetfunc, descrsetfunc, objobjproc, objobjargproc,
diff --git a/pypy/module/cpyext/test/test_api.py 
b/pypy/module/cpyext/test/test_api.py
--- a/pypy/module/cpyext/test/test_api.py
+++ b/pypy/module/cpyext/test/test_api.py
@@ -5,7 +5,7 @@
 from pypy.module.cpyext.state import State
 from pypy.module.cpyext.api import (
     slot_function, cpython_api, copy_header_files, INTERPLEVEL_API,
-    Py_ssize_t, Py_ssize_tP, PyObject)
+    Py_ssize_t, Py_ssize_tP, PyObject, cts)
 from pypy.module.cpyext.test.test_cpyext import freeze_refcnts, 
LeakCheckingTest
 from pypy.interpreter.error import OperationError
 from rpython.rlib import rawrefcount
@@ -99,10 +99,10 @@
     def test_typedef(self, space):
         from rpython.translator.c.database import LowLevelDatabase
         db = LowLevelDatabase()
-        assert PyPy_TypedefTest1.api_func.get_c_restype(db) == 'Py_ssize_t'
-        assert PyPy_TypedefTest1.api_func.get_c_args(db) == 'Py_ssize_t arg0'
-        assert PyPy_TypedefTest2.api_func.get_c_restype(db) == 'Py_ssize_t *'
-        assert PyPy_TypedefTest2.api_func.get_c_args(db) == 'Py_ssize_t *arg0'
+        assert PyPy_TypedefTest1.api_func.get_c_restype(db) == 'Signed'
+        assert PyPy_TypedefTest1.api_func.get_c_args(db) == 'Signed arg0'
+        assert PyPy_TypedefTest2.api_func.get_c_restype(db) == 'Signed *'
+        assert PyPy_TypedefTest2.api_func.get_c_args(db) == 'Signed *arg0'
 
         PyPy_TypedefTest1(space, 0)
         ppos = lltype.malloc(Py_ssize_tP.TO, 1, flavor='raw')
@@ -113,7 +113,7 @@
 @pytest.mark.skipif(os.environ.get('USER')=='root',
                     reason='root can write to all files')
 def test_copy_header_files(tmpdir):
-    copy_header_files(tmpdir, True)
+    copy_header_files(cts, tmpdir, True)
     def check(name):
         f = tmpdir.join(name)
         assert f.check(file=True)
diff --git a/pypy/module/cpyext/test/test_bytesobject.py 
b/pypy/module/cpyext/test/test_bytesobject.py
--- a/pypy/module/cpyext/test/test_bytesobject.py
+++ b/pypy/module/cpyext/test/test_bytesobject.py
@@ -7,8 +7,7 @@
 from pypy.module.cpyext.bytesobject import new_empty_str, PyBytesObject
 from pypy.module.cpyext.api import PyObjectP, PyObject, Py_ssize_tP, 
generic_cpy_call, Py_buffer
 from pypy.module.cpyext.pyobject import Py_DecRef, from_ref, make_ref, as_pyobj
-from pypy.module.cpyext.typeobjectdefs import PyTypeObjectPtr
-
+from pypy.module.cpyext.api import PyTypeObjectPtr
 
 
 class AppTestBytesObject(AppTestCpythonExtensionBase):
diff --git a/pypy/module/cpyext/test/test_cparser.py 
b/pypy/module/cpyext/test/test_cparser.py
new file mode 100644
--- /dev/null
+++ b/pypy/module/cpyext/test/test_cparser.py
@@ -0,0 +1,218 @@
+from rpython.flowspace.model import const
+from rpython.flowspace.objspace import build_flow
+from rpython.translator.simplify import simplify_graph
+from rpython.rtyper.lltypesystem import rffi, lltype
+from pypy.module.cpyext.cparser import parse_source, CTypeSpace
+
+def test_configure():
+    decl = """
+    typedef ssize_t Py_ssize_t;
+
+    typedef struct {
+        Py_ssize_t ob_refcnt;
+        Py_ssize_t ob_pypy_link;
+        double ob_fval;
+    } TestFloatObject;
+    """
+    cts = parse_source(decl)
+    TestFloatObject = cts.definitions['TestFloatObject']
+    assert isinstance(TestFloatObject, lltype.Struct)
+    assert TestFloatObject.c_ob_refcnt == rffi.SSIZE_T
+    assert TestFloatObject.c_ob_pypy_link == rffi.SSIZE_T
+    assert TestFloatObject.c_ob_fval == rffi.DOUBLE
+
+def test_simple():
+    decl = "typedef ssize_t Py_ssize_t;"
+    cts = parse_source(decl)
+    assert cts.definitions == {'Py_ssize_t': rffi.SSIZE_T}
+
+def test_macro():
+    decl = """
+    typedef ssize_t Py_ssize_t;
+
+    #define PyObject_HEAD  \
+        Py_ssize_t ob_refcnt;        \
+        Py_ssize_t ob_pypy_link;     \
+
+    typedef struct {
+        PyObject_HEAD
+        double ob_fval;
+    } PyFloatObject;
+    """
+    cts = parse_source(decl)
+    assert 'PyFloatObject' in cts.definitions
+    assert 'PyObject_HEAD' in cts.macros
+
+def test_include():
+    cdef1 = """
+    typedef ssize_t Py_ssize_t;
+
+    #define PyObject_HEAD  \
+        Py_ssize_t ob_refcnt;        \
+        Py_ssize_t ob_pypy_link;     \
+
+    typedef struct {
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