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-rw-r--r--src/H5T.c106
1 files changed, 106 insertions, 0 deletions
diff --git a/src/H5T.c b/src/H5T.c
index 01ace87..9544488 100644
--- a/src/H5T.c
+++ b/src/H5T.c
@@ -295,6 +295,7 @@ static htri_t H5T__compiler_conv(H5T_t *src, H5T_t *dst);
static herr_t H5T__set_size(H5T_t *dt, size_t size);
static herr_t H5T__close_cb(H5T_t *dt);
static H5T_path_t *H5T__path_find_real(const H5T_t *src, const H5T_t *dst, const char *name, H5T_conv_func_t *conv);
+static hbool_t H5T__detect_reg_ref(const H5T_t *dt);
/*****************************/
@@ -5506,6 +5507,111 @@ done:
/*-------------------------------------------------------------------------
+ * Function: H5T_detect_reg_ref
+ *
+ * Purpose: Check whether a datatype contains (or is) a region reference
+ * datatype.
+ *
+ * Return: TRUE (1) or FALSE (0) on success
+ * (Can't fail)
+ *
+ * Programmer: Quincey Koziol
+ * Saturday, January 5, 2019
+ *
+ *-------------------------------------------------------------------------
+ */
+static hbool_t
+H5T__detect_reg_ref(const H5T_t *dt)
+{
+ unsigned u; /* Local index variable */
+ hbool_t ret_value = FALSE; /* Return value */
+
+ FUNC_ENTER_STATIC_NOERR
+
+ /* Sanity checks */
+ HDassert(dt);
+
+ /* Check if this datatype is a region reference */
+ if(H5T_REFERENCE == dt->shared->type && H5R_DATASET_REGION == dt->shared->u.atomic.u.r.rtype)
+ HGOTO_DONE(TRUE);
+
+ /* Check for types that might have the correct type as a component */
+ switch(dt->shared->type) {
+ case H5T_COMPOUND:
+ /* Iterate over all the compound datatype's fields */
+ for(u = 0; u < dt->shared->u.compnd.nmembs; u++)
+ /* Recurse on field's datatype */
+ if(H5T__detect_reg_ref(dt->shared->u.compnd.memb[u].type))
+ HGOTO_DONE(TRUE);
+ break;
+
+ case H5T_ARRAY:
+ case H5T_VLEN:
+ case H5T_ENUM:
+ HGOTO_DONE(H5T__detect_reg_ref(dt->shared->parent));
+ break;
+
+ case H5T_NO_CLASS:
+ case H5T_INTEGER:
+ case H5T_FLOAT:
+ case H5T_TIME:
+ case H5T_STRING:
+ case H5T_BITFIELD:
+ case H5T_OPAQUE:
+ case H5T_REFERENCE:
+ case H5T_NCLASSES:
+ default:
+ break;
+ } /* end if */
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5T__detect_reg_ref() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5T_is_vl_storage
+ *
+ * Purpose: Check if a datatype will be stored in a variable-length form.
+ *
+ * Notes: Currently, only variable-length string & sequences and region
+ * references are stored in a variable-length form.
+ *
+ * Return:
+ * One of two values on success:
+ * TRUE - If the datatype will be stored in a variable-length form
+ * FALSE - If the datatype will NOT be stored in a variable-length form
+ * <0 is returned on failure
+ *
+ * Programmer: Quincey Koziol
+ * Saturday, January 5, 2019
+ *
+ *-------------------------------------------------------------------------
+ */
+htri_t
+H5T_is_vl_storage(const H5T_t *dt)
+{
+ htri_t ret_value = FALSE;
+
+ FUNC_ENTER_NOAPI(FAIL)
+
+ /* Sanity check */
+ HDassert(dt);
+
+ /* VL and region reference datatypes are stored in variable-length form */
+ if(H5T_detect_class(dt, H5T_VLEN, FALSE))
+ ret_value = TRUE;
+ else if(H5T_detect_class(dt, H5T_REFERENCE, FALSE))
+ ret_value = H5T__detect_reg_ref(dt);
+ else
+ ret_value = FALSE;
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5T_is_vl_storage() */
+
+
+/*-------------------------------------------------------------------------
* Function: H5T_upgrade_version_cb
*
* Purpose: H5T__visit callback to Upgrade the version of a datatype