commit 17d76210f8ecb066c9ae122cd37556721a20af51
author Raymond Hettinger <python@rcn.com> Mon Apr 02 22:54:21 2007 +0000
committer Raymond Hettinger <python@rcn.com> Mon Apr 02 22:54:21 2007 +0000
tree 2824e25e4a20bad8fab180ecaa6f5d1fcca71032
parent 2986cc8310d8def92fb727e1d878e55138fc1291

Array module's buffer interface can now handle empty arrays.

Modules/arraymodule.c

diff --git a/Modules/arraymodule.c b/Modules/arraymodule.c
index 0aeb64e..3ba5cf8 100644
--- a/Modules/arraymodule.c
+++ b/Modules/arraymodule.c
@@ -1745,6 +1745,8 @@
 	(objobjargproc)array_ass_subscr
 };
 
+static const void *emptybuf = "";
+
 static Py_ssize_t
 array_buffer_getreadbuf(arrayobject *self, Py_ssize_t index, const void **ptr)
 {
@@ -1754,6 +1756,8 @@
 		return -1;
 	}
 	*ptr = (void *)self->ob_item;
+	if (*ptr == NULL)
+		*ptr = emptybuf;
 	return self->ob_size*self->ob_descr->itemsize;
 }
 
@@ -1766,6 +1770,8 @@
 		return -1;
 	}
 	*ptr = (void *)self->ob_item;
+	if (*ptr == NULL)
+		*ptr = emptybuf;
 	return self->ob_size*self->ob_descr->itemsize;
 }