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

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This commit is contained in:
Raymond Hettinger 2007-04-02 22:39:08 +00:00
parent 4bbcb64d5d
commit d6030acd7f
3 changed files with 15 additions and 0 deletions
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6
Modules/arraymodule.c
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@ -1745,6 +1745,8 @@ static PyMappingMethods array_as_mapping = {
(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 @@ array_buffer_getreadbuf(arrayobject *self, Py_ssize_t index, const void **ptr)
return -1;
}
*ptr = (void *)self->ob_item;
if (*ptr == NULL)
*ptr = emptybuf;
return self->ob_size*self->ob_descr->itemsize;
}
@ -1766,6 +1770,8 @@ array_buffer_getwritebuf(arrayobject *self, Py_ssize_t index, const void **ptr)
return -1;
}
*ptr = (void *)self->ob_item;
if (*ptr == NULL)
*ptr = emptybuf;
return self->ob_size*self->ob_descr->itemsize;
}