1 files changed, 102 insertions, 0 deletions
diff --git a/src/H5Goh.c b/src/H5Goh.c
new file mode 100644
index 0000000..c51a493
--- /dev/null
+++ b/src/H5Goh.c
@@ -0,0 +1,102 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html.  If you do not have     *
+ * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/****************/
+/* Module Setup */
+/****************/
+
+#define H5O_PACKAGE		/*suppress error about including H5Opkg	  */
+
+/***********/
+/* Headers */
+/***********/
+#include "H5private.h"		/* Generic Functions			*/
+#include "H5Eprivate.h"		/* Error handling		  	*/
+#include "H5Opkg.h"             /* Object headers			*/
+
+/****************/
+/* Local Macros */
+/****************/
+
+/******************/
+/* Local Typedefs */
+/******************/
+
+/********************/
+/* Local Prototypes */
+/********************/
+static htri_t H5O_group_isa(H5O_t *loc);
+
+/*********************/
+/* Package Variables */
+/*********************/
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+/* This message derives from H5O object class */
+const H5O_obj_class_t H5O_OBJ_GROUP[1] = {{
+    H5G_GROUP,			/* object type			*/
+    "group",			/* object name, for debugging	*/
+    NULL,			/* get 'copy file' user data	*/
+    NULL,			/* free 'copy file' user data	*/
+    H5O_group_isa 		/* "isa" message		*/
+}};
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_group_isa
+ *
+ * Purpose:	Determines if an object has the requisite messages for being
+ *		a group.
+ *
+ * Return:	Success:	TRUE if the required group messages are
+ *				present; FALSE otherwise.
+ *
+ *		Failure:	FAIL if the existence of certain messages
+ *				cannot be determined.
+ *
+ * Programmer:	Robb Matzke
+ *              Monday, November  2, 1998
+ *
+ *-------------------------------------------------------------------------
+ */
+htri_t
+H5O_group_isa(struct H5O_t *oh)
+{
+    htri_t	stab_exists;            /* Whether the 'stab' message is in the object header */
+    htri_t	linfo_exists;           /* Whether the 'linfo' message is in the object header */
+    htri_t	ret_value;              /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT(H5O_group_isa)
+
+    HDassert(oh);
+
+    /* Check for any of the messages that indicate a group */
+    if((stab_exists = H5O_exists_oh(oh, H5O_STAB_ID, 0)) < 0)
+	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to read object header")
+    if((linfo_exists = H5O_exists_oh(oh, H5O_LINFO_ID, 0)) < 0)
+	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to read object header")
+
+    ret_value = (stab_exists > 0 || linfo_exists > 0);
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_group_isa() */
+