Added Includes/python_buffer.pxd

Includes/python_buffer.pxd

+# Please see the Python header files (object.h) for docs
+
+cdef extern from "Python.h":
+    ctypedef void PyObject
+    
+    ctypedef struct bufferinfo:
+        void *buf     
+        Py_ssize_t len
+        Py_ssize_t itemsize            
+        int readonly
+        int ndim
+        char *format
+        Py_ssize_t *shape
+        Py_ssize_t *strides
+        Py_ssize_t *suboffsets
+        void *internal
+    ctypedef bufferinfo Py_buffer
+
+    cdef enum:
+        PyBUF_SIMPLE,
+        PyBUF_WRITABLE,
+        PyBUF_WRITEABLE, # backwards compatability
+        PyBUF_FORMAT,
+        PyBUF_ND,
+        PyBUF_STRIDES,
+        PyBUF_C_CONTIGUOUS,
+        PyBUF_F_CONTIGUOUS,
+        PyBUF_ANY_CONTIGUOUS,
+        PyBUF_INDIRECT,
+        PyBUF_CONTIG,
+        PyBUF_CONTIG_RO,
+        PyBUF_STRIDED,
+        PyBUF_STRIDED_RO,
+        PyBUF_RECORDS,
+        PyBUF_RECORDS_RO,
+        PyBUF_FULL,
+        PyBUF_FULL_RO,
+        PyBUF_READ,
+        PyBUF_WRITE,
+        PyBUF_SHADOW
+
+    int PyObject_CheckBuffer(PyObject* obj)
+    int PyObject_GetBuffer(PyObject *obj, Py_buffer *view, int flags)
+    void PyObject_ReleaseBuffer(PyObject *obj, Py_buffer *view)
+    void* PyBuffer_GetPointer(Py_buffer *view, Py_ssize_t *indices)
+    int PyBuffer_SizeFromFormat(char *) # actually const char
+    int PyBuffer_ToContiguous(void *buf, Py_buffer *view, Py_ssize_t len, char fort)
+    int PyBuffer_FromContiguous(Py_buffer *view, void *buf, Py_ssize_t len, char fort)
+    int PyObject_CopyData(PyObject *dest, PyObject *src)
+    int PyBuffer_IsContiguous(Py_buffer *view, char fort)
+    void PyBuffer_FillContiguousStrides(int ndims, 
+                                        Py_ssize_t *shape, 
+                                        Py_ssize_t *strides,
+                                        int itemsize,
+                                        char fort)
+    int PyBuffer_FillInfo(Py_buffer *view, void *buf,
+                          Py_ssize_t len, int readonly,
+                          int flags)
+
+    PyObject* PyObject_Format(PyObject* obj,
+                              PyObject *format_spec)