Byte Array Objects
******************

type PyByteArrayObject

   This subtype of "PyObject" represents a Python bytearray object.

PyTypeObject PyByteArray_Type
    * Part of the Stable ABI.*

   This instance of "PyTypeObject" represents the Python bytearray
   type; it is the same object as "bytearray" in the Python layer.


Type check macros
=================

int PyByteArray_Check(PyObject *o)

   Return true if the object *o* is a bytearray object or an instance
   of a subtype of the bytearray type.  This function always succeeds.

int PyByteArray_CheckExact(PyObject *o)

   Return true if the object *o* is a bytearray object, but not an
   instance of a subtype of the bytearray type.  This function always
   succeeds.


Direct API functions
====================

PyObject *PyByteArray_FromObject(PyObject *o)
    *Return value: New reference.** Part of the Stable ABI.** Thread
   safety: Safe for concurrent use on the same object.*

   Return a new bytearray object from any object, *o*, that implements
   the buffer protocol.

   On failure, return "NULL" with an exception set.

   Note:

     If the object implements the buffer protocol, then the buffer
     must not be mutated while the bytearray object is being created.

PyObject *PyByteArray_FromStringAndSize(const char *string, Py_ssize_t len)
    *Return value: New reference.** Part of the Stable ABI.** Thread
   safety: Atomic.*

   Create a new bytearray object from *string* and its length, *len*.

   On failure, return "NULL" with an exception set.

PyObject *PyByteArray_Concat(PyObject *a, PyObject *b)
    *Return value: New reference.** Part of the Stable ABI.** Thread
   safety: Safe for concurrent use on the same object.*

   Concat bytearrays *a* and *b* and return a new bytearray with the
   result.

   On failure, return "NULL" with an exception set.

   Note:

     If the object implements the buffer protocol, then the buffer
     must not be mutated while the bytearray object is being created.

Py_ssize_t PyByteArray_Size(PyObject *bytearray)
    * Part of the Stable ABI.** Thread safety: Atomic.*

   Return the size of *bytearray* after checking for a "NULL" pointer.

char *PyByteArray_AsString(PyObject *bytearray)
    * Part of the Stable ABI.** Thread safety: Safe to call from
   multiple threads with external synchronization only.*

   Return the contents of *bytearray* as a char array after checking
   for a "NULL" pointer.  The returned array always has an extra null
   byte appended.

   Note:

     It is not thread-safe to mutate the bytearray object while using
     the returned char array.

int PyByteArray_Resize(PyObject *bytearray, Py_ssize_t len)
    * Part of the Stable ABI.*

   Resize the internal buffer of *bytearray* to *len*. Failure is a
   "-1" return with an exception set.

   Changed in version 3.14: A negative *len* will now result in an
   exception being set and -1 returned.


Macros
======

These macros trade safety for speed and they don’t check pointers.

char *PyByteArray_AS_STRING(PyObject *bytearray)
    * Thread safety: Safe to call from multiple threads with external
   synchronization only.*

   Similar to "PyByteArray_AsString()", but without error checking.

   Note:

     It is not thread-safe to mutate the bytearray object while using
     the returned char array.

Py_ssize_t PyByteArray_GET_SIZE(PyObject *bytearray)
    * Thread safety: Atomic.*

   Similar to "PyByteArray_Size()", but without error checking.
