1 #ifndef Py_CPYTHON_BYTEARRAYOBJECT_H
2 #  error "this header file must not be included directly"
3 #endif
4 
5 /* Object layout */
6 typedef struct {
7     PyObject_VAR_HEAD
8     Py_ssize_t ob_alloc;   /* How many bytes allocated in ob_bytes */
9     char *ob_bytes;        /* Physical backing buffer */
10     char *ob_start;        /* Logical start inside ob_bytes */
11     Py_ssize_t ob_exports; /* How many buffer exports */
12 } PyByteArrayObject;
13 
14 PyAPI_DATA(char) _PyByteArray_empty_string[];
15 
16 /* Macros and static inline functions, trading safety for speed */
17 #define _PyByteArray_CAST(op) \
18     (assert(PyByteArray_Check(op)), _Py_CAST(PyByteArrayObject*, op))
19 
PyByteArray_AS_STRING(PyObject * op)20 static inline char* PyByteArray_AS_STRING(PyObject *op)
21 {
22     PyByteArrayObject *self = _PyByteArray_CAST(op);
23     if (Py_SIZE(self)) {
24         return self->ob_start;
25     }
26     return _PyByteArray_empty_string;
27 }
28 #if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 < 0x030b0000
29 #  define PyByteArray_AS_STRING(self) PyByteArray_AS_STRING(_PyObject_CAST(self))
30 #endif
31 
PyByteArray_GET_SIZE(PyObject * op)32 static inline Py_ssize_t PyByteArray_GET_SIZE(PyObject *op) {
33     PyByteArrayObject *self = _PyByteArray_CAST(op);
34     return Py_SIZE(self);
35 }
36 #if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 < 0x030b0000
37 #  define PyByteArray_GET_SIZE(self) PyByteArray_GET_SIZE(_PyObject_CAST(self))
38 #endif
39