[svn-r7844] Purpose:

    Bug fix

Description:
    Variable length strings and sequences with NULL pointers were not handled
by library, causing problems access the data.  This also affected fill values
for variable-length datatypes.

Solution:
    Address the issues in the library by detecting NULL sequences/strings
and avoid trying to convert them.

    Patched up dumper to display NULL sequences/strings.

Platforms tested:
    FreeBSD 4.9 (sleipnir)
    h5committest

1 files changed, 5 insertions, 3 deletions

diff --git a/src/H5HG.c b/src/H5HG.c
index 4d0e52d..f463b1c 100644
--- a/src/H5HG.c
+++ b/src/H5HG.c
@@ -743,9 +743,11 @@ H5HG_insert (H5F_t *f, hid_t dxpl_id, size_t size, void *obj, H5HG_t *hobj/*out*
     assert (idx>0);
     
     /* Copy data into the heap */
-    HDmemcpy(heap->obj[idx].begin+H5HG_SIZEOF_OBJHDR(f), obj, size);
-    HDmemset(heap->obj[idx].begin+H5HG_SIZEOF_OBJHDR(f)+size, 0,
-	     need-(H5HG_SIZEOF_OBJHDR(f)+size));
+    if(size>0) {
+        HDmemcpy(heap->obj[idx].begin+H5HG_SIZEOF_OBJHDR(f), obj, size);
+        HDmemset(heap->obj[idx].begin+H5HG_SIZEOF_OBJHDR(f)+size, 0,
+                 need-(H5HG_SIZEOF_OBJHDR(f)+size));
+    } /* end if */
     heap->cache_info.dirty = TRUE;
 
     /* Return value */