cpython/Include/asdl.h
Victor Stinner 4d73ae7761
bpo-18407: ast.c uses Py_ssize_t for asdl_seq_LEN() iterator (GH-10655)
When iterating using asdl_seq_LEN(), use 'Py_ssize_t' type instead of
'int' for the iterator variable, to avoid downcast on 64-bit platforms.

_Py_asdl_int_seq_new() now also ensures that the index is greater than
or equal to 0.
2018-11-22 14:45:16 +01:00

47 lines
1.2 KiB
C

#ifndef Py_ASDL_H
#define Py_ASDL_H
typedef PyObject * identifier;
typedef PyObject * string;
typedef PyObject * bytes;
typedef PyObject * object;
typedef PyObject * singleton;
typedef PyObject * constant;
/* It would be nice if the code generated by asdl_c.py was completely
independent of Python, but it is a goal the requires too much work
at this stage. So, for example, I'll represent identifiers as
interned Python strings.
*/
/* XXX A sequence should be typed so that its use can be typechecked. */
typedef struct {
Py_ssize_t size;
void *elements[1];
} asdl_seq;
typedef struct {
Py_ssize_t size;
int elements[1];
} asdl_int_seq;
asdl_seq *_Py_asdl_seq_new(Py_ssize_t size, PyArena *arena);
asdl_int_seq *_Py_asdl_int_seq_new(Py_ssize_t size, PyArena *arena);
#define asdl_seq_GET(S, I) (S)->elements[(I)]
#define asdl_seq_LEN(S) ((S) == NULL ? 0 : (S)->size)
#ifdef Py_DEBUG
#define asdl_seq_SET(S, I, V) \
do { \
Py_ssize_t _asdl_i = (I); \
assert((S) != NULL); \
assert(0 <= _asdl_i && _asdl_i < (S)->size); \
(S)->elements[_asdl_i] = (V); \
} while (0)
#else
#define asdl_seq_SET(S, I, V) (S)->elements[I] = (V)
#endif
#endif /* !Py_ASDL_H */