Add Greg Stein's buffer object API.

Include/Python.h

@@ -76,6 +76,7 @@ PERFORMANCE OF THIS SOFTWARE.
 #endif
 #include "rangeobject.h"
 #include "stringobject.h"
+#include "bufferobject.h"
 #include "tupleobject.h"
 #include "listobject.h"
 #include "dictobject.h"

Include/bufferobject.h

+#ifndef Py_BUFFEROBJECT_H
+#define Py_BUFFEROBJECT_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/***********************************************************
+Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
+The Netherlands.
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in
+supporting documentation, and that the names of Stichting Mathematisch
+Centrum or CWI or Corporation for National Research Initiatives or
+CNRI not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior
+permission.
+
+While CWI is the initial source for this software, a modified version
+is made available by the Corporation for National Research Initiatives
+(CNRI) at the Internet address ftp://ftp.python.org.
+
+STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
+CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
+DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.
+
+******************************************************************/
+
+/* Buffer object interface */
+
+/* Note: the object's structure is private */
+
+
+extern DL_IMPORT(PyTypeObject) PyBuffer_Type;
+
+#define PyBuffer_Check(op) ((op)->ob_type == &PyBuffer_Type)
+
+#define Py_END_OF_BUFFER	(-1)
+
+extern PyObject *PyBuffer_FromObject Py_PROTO((PyObject *base, int offset, int size));
+extern PyObject *PyBuffer_FromReadWriteObject Py_PROTO((PyObject *base, int offset, int size));
+
+extern PyObject *PyBuffer_FromMemory Py_PROTO((void *ptr, int size));
+extern PyObject *PyBuffer_FromReadWriteMemory Py_PROTO((void *ptr, int size));
+
+extern PyObject *PyBuffer_New Py_PROTO((int size));
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* !Py_BUFFEROBJECT_H */
+