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