Add necessary headers to back-port new buffer protocol to Python 2.6
diff --git a/Include/abstract.h b/Include/abstract.h
index c61cc8b..159e67d 100644
--- a/Include/abstract.h
+++ b/Include/abstract.h
@@ -529,6 +529,109 @@
*/
+ /* new buffer API */
+
+#define PyObject_CheckBuffer(obj) \
+ (((obj)->ob_type->tp_as_buffer != NULL) && \
+ ((obj)->ob_type->tp_as_buffer->bf_getbuffer != NULL))
+
+ /* Return 1 if the getbuffer function is available, otherwise
+ return 0 */
+
+ PyAPI_FUNC(int) PyObject_GetBuffer(PyObject *obj, Py_buffer *view,
+ int flags);
+
+ /* This is a C-API version of the getbuffer function call. It checks
+ to make sure object has the required function pointer and issues the
+ call. Returns -1 and raises an error on failure and returns 0 on
+ success
+ */
+
+
+ PyAPI_FUNC(void) PyObject_ReleaseBuffer(PyObject *obj, Py_buffer *view);
+
+
+ /* C-API version of the releasebuffer function call. It
+ checks to make sure the object has the required function
+ pointer and issues the call. The obj must have the buffer
+ interface or this function will cause a segfault (i.e. it
+ is assumed to be called only after a corresponding
+ getbuffer which already verified the existence of the
+ tp_as_buffer pointer).
+
+ Returns 0 on success and -1 (with an error raised) on
+ failure. This function always succeeds (as a NO-OP) if
+ there is no releasebuffer function for the object so that
+ it can always be called when the consumer is done with the
+ buffer
+ */
+
+ PyAPI_FUNC(void *) PyBuffer_GetPointer(Py_buffer *view, Py_ssize_t *indices);
+
+ /* Get the memory area pointed to by the indices for the buffer given.
+ Note that view->ndim is the assumed size of indices
+ */
+
+ PyAPI_FUNC(int) PyBuffer_SizeFromFormat(const char *);
+
+ /* Return the implied itemsize of the data-format area from a
+ struct-style description */
+
+
+
+ PyAPI_FUNC(int) PyBuffer_ToContiguous(void *buf, Py_buffer *view,
+ Py_ssize_t len, char fort);
+
+ PyAPI_FUNC(int) PyBuffer_FromContiguous(Py_buffer *view, void *buf,
+ Py_ssize_t len, char fort);
+
+
+ /* Copy len bytes of data from the contiguous chunk of memory
+ pointed to by buf into the buffer exported by obj. Return
+ 0 on success and return -1 and raise a PyBuffer_Error on
+ error (i.e. the object does not have a buffer interface or
+ it is not working).
+
+ If fort is 'F' and the object is multi-dimensional,
+ then the data will be copied into the array in
+ Fortran-style (first dimension varies the fastest). If
+ fort is 'C', then the data will be copied into the array
+ in C-style (last dimension varies the fastest). If fort
+ is 'A', then it does not matter and the copy will be made
+ in whatever way is more efficient.
+
+ */
+
+ PyAPI_FUNC(int) PyObject_CopyData(PyObject *dest, PyObject *src);
+
+ /* Copy the data from the src buffer to the buffer of destination
+ */
+
+ PyAPI_FUNC(int) PyBuffer_IsContiguous(Py_buffer *view, char fort);
+
+
+ PyAPI_FUNC(void) PyBuffer_FillContiguousStrides(int ndims,
+ Py_ssize_t *shape,
+ Py_ssize_t *strides,
+ int itemsize,
+ char fort);
+
+ /* Fill the strides array with byte-strides of a contiguous
+ (Fortran-style if fort is 'F' or C-style otherwise)
+ array of the given shape with the given number of bytes
+ per element.
+ */
+
+ PyAPI_FUNC(int) PyBuffer_FillInfo(Py_buffer *view, void *buf,
+ Py_ssize_t len, int readonly,
+ int flags);
+
+ /* Fills in a buffer-info structure correctly for an exporter
+ that can only share a contiguous chunk of memory of
+ "unsigned bytes" of the given length. Returns 0 on success
+ and -1 (with raising an error) on error.
+ */
+
PyAPI_FUNC(PyObject *) PyObject_Format(PyObject* obj,
PyObject *format_spec);
/*