Author: Armin Rigo <ar...@tunes.org>
Branch: cffi-1.0
Changeset: r76998:25f80e5bbfeb
Date: 2015-05-03 10:48 +0200
http://bitbucket.org/pypy/pypy/changeset/25f80e5bbfeb/
Log: ffi.getctype
diff --git a/pypy/module/_cffi_backend/ffi_obj.py
b/pypy/module/_cffi_backend/ffi_obj.py
--- a/pypy/module/_cffi_backend/ffi_obj.py
+++ b/pypy/module/_cffi_backend/ffi_obj.py
@@ -5,7 +5,7 @@
from rpython.rlib import jit, rgc
from pypy.module._cffi_backend import parse_c_type, realize_c_type
-from pypy.module._cffi_backend import newtype, cerrno, ccallback
+from pypy.module._cffi_backend import newtype, cerrno, ccallback, ctypearray
from pypy.module._cffi_backend.ctypeobj import W_CType
from pypy.module._cffi_backend.cdataobj import W_CData
@@ -120,6 +120,36 @@
_cffi_backend.callback(ctype, python_callable, error))""")
+ @unwrap_spec(replace_with=str)
+ def descr_getctype(self, w_cdecl, replace_with=''):
+ """\
+Return a string giving the C type 'cdecl', which may be itself a
+string or a <ctype> object. If 'replace_with' is given, it gives
+extra text to append (or insert for more complicated C types), like a
+variable name, or '*' to get actually the C type 'pointer-to-cdecl'."""
+ #
+ w_ctype = self.ffi_type(w_cdecl, ACCEPT_STRING | ACCEPT_CTYPE)
+ replace_with = replace_with.strip(' ')
+ if len(replace_with) == 0:
+ result = w_ctype.name
+ else:
+ add_paren = (replace_with[0] == '*' and
+ isinstance(w_ctype, ctypearray.W_CTypeArray))
+ add_space = (not add_paren and replace_with[0] != '['
+ and replace_with[0] != '(')
+ #
+ result = w_ctype.name[:w_ctype.name_position]
+ if add_paren:
+ result += '('
+ if add_space:
+ result += ' '
+ result += replace_with
+ if add_paren:
+ result += ')'
+ result += w_ctype.name[w_ctype.name_position:]
+ return self.space.wrap(result)
+
+
@unwrap_spec(w_init=WrappedDefault(None))
def descr_new(self, w_arg, w_init):
"""\
@@ -208,6 +238,7 @@
cls=W_FFIObject),
alignof = interp2app(W_FFIObject.descr_alignof),
callback = interp2app(W_FFIObject.descr_callback),
+ getctype = interp2app(W_FFIObject.descr_getctype),
new = interp2app(W_FFIObject.descr_new),
sizeof = interp2app(W_FFIObject.descr_sizeof),
string = interp2app(W_FFIObject.descr_string),
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