patch 8.1.0802: negative index doesn't work for Blob
Problem: Negative index doesn't work for Blob.
Solution: Make it work, add a test. (closes #3856)
diff --git a/src/blob.c b/src/blob.c
index a954030..9dc7926 100644
--- a/src/blob.c
+++ b/src/blob.c
@@ -72,8 +72,12 @@
int len = from->vval.v_blob->bv_ga.ga_len;
if (len > 0)
+ {
to->vval.v_blob->bv_ga.ga_data =
vim_memsave(from->vval.v_blob->bv_ga.ga_data, len);
+ if (to->vval.v_blob->bv_ga.ga_data == NULL)
+ len = 0;
+ }
to->vval.v_blob->bv_ga.ga_len = len;
}
return ret;
@@ -112,7 +116,7 @@
* Get byte "idx" in blob "b".
* Caller must check that "idx" is valid.
*/
- char_u
+ int
blob_get(blob_T *b, int idx)
{
return ((char_u*)b->bv_ga.ga_data)[idx];