mirror of
https://github.com/python/cpython.git
synced 2024-11-27 11:55:13 +08:00
a0867f79bb
This uses up to 12.5% overallocation, not entirely unlike list_resize(). Could probably use more tweaks for odd allocation patterns, TBD. Also add __alloc__() method which returns the actually allocated size. PS. I'm now convinced that we need something like "".join(); later.
50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/* Bytes object interface */
|
|
|
|
#ifndef Py_BYTESOBJECT_H
|
|
#define Py_BYTESOBJECT_H
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#include <stdarg.h>
|
|
|
|
/* Type PyBytesObject represents a mutable array of bytes.
|
|
* The Python API is that of a sequence;
|
|
* the bytes are mapped to ints in [0, 256).
|
|
* Bytes are not characters; they may be used to encode characters.
|
|
* The only way to go between bytes and str/unicode is via encoding
|
|
* and decoding.
|
|
* For the concenience of C programmers, the bytes type is considered
|
|
* to contain a char pointer, not an unsigned char pointer.
|
|
*/
|
|
|
|
/* Object layout */
|
|
typedef struct {
|
|
PyObject_VAR_HEAD
|
|
Py_ssize_t ob_alloc; /* How many bytes allocated */
|
|
char *ob_bytes;
|
|
} PyBytesObject;
|
|
|
|
/* Type object */
|
|
PyAPI_DATA(PyTypeObject) PyBytes_Type;
|
|
|
|
/* Type check macros */
|
|
#define PyBytes_Check(self) PyObject_TypeCheck(self, &PyBytes_Type)
|
|
#define PyBytes_CheckExact(self) ((self)->ob_type == &PyBytes_Type)
|
|
|
|
/* Direct API functions */
|
|
PyAPI_FUNC(PyObject *) PyBytes_FromObject(PyObject *);
|
|
PyAPI_FUNC(PyObject *) PyBytes_FromStringAndSize(const char *, Py_ssize_t);
|
|
PyAPI_FUNC(Py_ssize_t) PyBytes_Size(PyObject *);
|
|
PyAPI_FUNC(char *) PyBytes_AsString(PyObject *);
|
|
PyAPI_FUNC(int) PyBytes_Resize(PyObject *, Py_ssize_t);
|
|
|
|
/* Macros, trading safety for speed */
|
|
#define PyBytes_AS_STRING(self) (((PyBytesObject *)(self))->ob_bytes)
|
|
#define PyBytes_GET_SIZE(self) (((PyBytesObject *)(self))->ob_size)
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#endif /* !Py_BYTESOBJECT_H */
|