Author: Armin Rigo <[email protected]>
Branch:
Changeset: r622:959c9878a261
Date: 2012-07-10 15:18 +0200
http://bitbucket.org/cffi/cffi/changeset/959c9878a261/
Log: Extension to the C language: cast to an array type (reason
documented).
diff --git a/c/_cffi_backend.c b/c/_cffi_backend.c
--- a/c/_cffi_backend.c
+++ b/c/_cffi_backend.c
@@ -2144,8 +2144,12 @@
if (!PyArg_ParseTuple(args, "O!O:cast", &CTypeDescr_Type, &ct, &ob))
return NULL;
- if (ct->ct_flags & (CT_POINTER|CT_FUNCTIONPTR)) {
- /* cast to a pointer or to a funcptr */
+ if (ct->ct_flags & (CT_POINTER|CT_FUNCTIONPTR|CT_ARRAY) &&
+ ct->ct_size >= 0) {
+ /* cast to a pointer, to a funcptr, or to an array.
+ Note that casting to an array is an extension to the C language,
+ which seems to be necessary in order to sanely get a
+ <cdata 'int[3]'> at some address. */
unsigned PY_LONG_LONG value;
if (CData_Check(ob)) {
diff --git a/c/test_c.py b/c/test_c.py
--- a/c/test_c.py
+++ b/c/test_c.py
@@ -1548,3 +1548,11 @@
def test_abi():
assert isinstance(FFI_DEFAULT_ABI, int)
+
+def test_cast_to_array():
+ # not valid in C! extension to get a non-owning <cdata 'int[3]'>
+ BInt = new_primitive_type("int")
+ BIntP = new_pointer_type(BInt)
+ BArray = new_array_type(BIntP, 3)
+ x = cast(BArray, 0)
+ assert repr(x) == "<cdata 'int[3]' NULL>"
_______________________________________________
pypy-commit mailing list
[email protected]
http://mail.python.org/mailman/listinfo/pypy-commit
