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cpython/Include/cpython/bytesobject.h at 3.11 · python/cpython · GitHub
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#ifndef
Py_CPYTHON_BYTESOBJECT_H
# error
"this header file must not be included directly"
#endif
typedef
struct
{
PyObject_VAR_HEAD
Py_DEPRECATED
(
3.11
)
Py_hash_t
ob_shash
;
char
ob_sval
[
1
];
/* Invariants:
* ob_sval contains space for 'ob_size+1' elements.
* ob_sval[ob_size] == 0.
* ob_shash is the hash of the byte string or -1 if not computed yet.
*/
}
PyBytesObject
;
PyAPI_FUNC
(
int
)
_PyBytes_Resize
(
PyObject
*
*
,
Py_ssize_t
);
PyAPI_FUNC
(
PyObject
*
)
_PyBytes_FormatEx
(
const
char
*
format
,
Py_ssize_t
format_len
,
PyObject
*
args
,
int
use_bytearray
);
PyAPI_FUNC
(
PyObject
*
)
_PyBytes_FromHex
(
PyObject
*
string
,
int
use_bytearray
);
/* Helper for PyBytes_DecodeEscape that detects invalid escape chars. */
PyAPI_FUNC
(
PyObject
*
)
_PyBytes_DecodeEscape2
(
const
char
*
,
Py_ssize_t
,
const
char
*
,
int
*
,
const
char
*
*
);
// Export for binary compatibility.
PyAPI_FUNC
(
PyObject
*
)
_PyBytes_DecodeEscape
(
const
char
*
,
Py_ssize_t
,
const
char
*
,
const
char
*
*
);
/* Macros and static inline functions, trading safety for speed */
#define
_PyBytes_CAST
(
op
) \
(assert(PyBytes_Check(op)), _Py_CAST(PyBytesObject*, op))
static
inline
char
*
PyBytes_AS_STRING
(
PyObject
*
op
)
{
return
_PyBytes_CAST
(
op
)
->
ob_sval
;
}
#if
!defined(
Py_LIMITED_API
)
||
Py_LIMITED_API
+
0
<
0x030b0000
# define
PyBytes_AS_STRING
(
op
) PyBytes_AS_STRING(_PyObject_CAST(op))
#endif
static
inline
Py_ssize_t
PyBytes_GET_SIZE
(
PyObject
*
op
) {
PyBytesObject
*
self
=
_PyBytes_CAST
(
op
);
return
Py_SIZE
(
self
);
}
#if
!defined(
Py_LIMITED_API
)
||
Py_LIMITED_API
+
0
<
0x030b0000
# define
PyBytes_GET_SIZE
(
self
) PyBytes_GET_SIZE(_PyObject_CAST(self))
#endif
/* _PyBytes_Join(sep, x) is like sep.join(x). sep must be PyBytesObject*,
x must be an iterable object. */
PyAPI_FUNC
(
PyObject
*
)
_PyBytes_Join
(
PyObject
*
sep
,
PyObject
*
x
);
/* The _PyBytesWriter structure is big: it contains an embedded "stack buffer".
A _PyBytesWriter variable must be declared at the end of variables in a
function to optimize the memory allocation on the stack. */
typedef
struct
{
/* bytes, bytearray or NULL (when the small buffer is used) */
PyObject
*
buffer
;
/* Number of allocated size. */
Py_ssize_t
allocated
;
/* Minimum number of allocated bytes,
incremented by _PyBytesWriter_Prepare() */
Py_ssize_t
min_size
;
/* If non-zero, use a bytearray instead of a bytes object for buffer. */
int
use_bytearray
;
/* If non-zero, overallocate the buffer (default: 0).
This flag must be zero if use_bytearray is non-zero. */
int
overallocate
;
/* Stack buffer */
int
use_small_buffer
;
char
small_buffer
[
512
];
}
_PyBytesWriter
;
/* Initialize a bytes writer
By default, the overallocation is disabled. Set the overallocate attribute
to control the allocation of the buffer. */
PyAPI_FUNC
(
void
)
_PyBytesWriter_Init
(
_PyBytesWriter
*
writer
);
/* Get the buffer content and reset the writer.
Return a bytes object, or a bytearray object if use_bytearray is non-zero.
Raise an exception and return NULL on error. */
PyAPI_FUNC
(
PyObject
*
)
_PyBytesWriter_Finish
(
_PyBytesWriter
*
writer
,
void
*
str
);
/* Deallocate memory of a writer (clear its internal buffer). */
PyAPI_FUNC
(
void
)
_PyBytesWriter_Dealloc
(
_PyBytesWriter
*
writer
);
/* Allocate the buffer to write size bytes.
Return the pointer to the beginning of buffer data.
Raise an exception and return NULL on error. */
PyAPI_FUNC
(
void
*
)
_PyBytesWriter_Alloc
(
_PyBytesWriter
*
writer
,
Py_ssize_t
size
);
/* Ensure that the buffer is large enough to write *size* bytes.
Add size to the writer minimum size (min_size attribute).
str is the current pointer inside the buffer.
Return the updated current pointer inside the buffer.
Raise an exception and return NULL on error. */
PyAPI_FUNC
(
void
*
)
_PyBytesWriter_Prepare
(
_PyBytesWriter
*
writer
,
void
*
str
,
Py_ssize_t
size
);
/* Resize the buffer to make it larger.
The new buffer may be larger than size bytes because of overallocation.
Return the updated current pointer inside the buffer.
Raise an exception and return NULL on error.
Note: size must be greater than the number of allocated bytes in the writer.
This function doesn't use the writer minimum size (min_size attribute).
See also _PyBytesWriter_Prepare().
*/
PyAPI_FUNC
(
void
*
)
_PyBytesWriter_Resize
(
_PyBytesWriter
*
writer
,
void
*
str
,
Py_ssize_t
size
);
/* Write bytes.
Raise an exception and return NULL on error. */
PyAPI_FUNC
(
void
*
)
_PyBytesWriter_WriteBytes
(
_PyBytesWriter
*
writer
,
void
*
str
,
const
void
*
bytes
,
Py_ssize_t
size
);
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