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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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 */
#ifdef H5_GROUP_REVISION
htri_t linfo_exists; /* Whether the 'linfo' message is in the object header */
#endif /* H5_GROUP_REVISION */
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")
#ifdef H5_GROUP_REVISION
if((linfo_exists = H5O_exists_oh(oh, H5O_LINFO_ID, 0)) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to read object header")
#endif /* H5_GROUP_REVISION */
#ifdef H5_GROUP_REVISION
ret_value = (stab_exists > 0 || linfo_exists > 0);
#else /* H5_GROUP_REVISION */
ret_value = stab_exists > 0;
#endif /* H5_GROUP_REVISION */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O_group_isa() */
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