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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* 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://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* Module Info: This module contains the functionality for setting & querying
* the datatype byte order for the H5T interface.
*/
#define H5T_PACKAGE /*suppress error about including H5Tpkg */
/* Interface initialization */
#define H5_INTERFACE_INIT_FUNC H5T_init_order_interface
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5Iprivate.h" /* IDs */
#include "H5Tpkg.h" /* Datatypes */
/*--------------------------------------------------------------------------
NAME
H5T_init_order_interface -- Initialize interface-specific information
USAGE
herr_t H5T_init_order_interface()
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
Initializes any interface-specific data or routines. (Just calls
H5T_init_iterface currently).
--------------------------------------------------------------------------*/
static herr_t
H5T_init_order_interface(void)
{
FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5T_init_order_interface)
FUNC_LEAVE_NOAPI(H5T_init())
} /* H5T_init_order_interface() */
/*-------------------------------------------------------------------------
* Function: H5Tget_order
*
* Purpose: Returns the byte order of a data type.
*
* Return: Success: A byte order constant
*
* Failure: H5T_ORDER_ERROR (Negative)
*
* Programmer: Robb Matzke
* Wednesday, January 7, 1998
*
* Modifications:
* Robb Matzke, 22 Dec 1998
* Also works for derived data types.
*
*-------------------------------------------------------------------------
*/
H5T_order_t
H5Tget_order(hid_t type_id)
{
H5T_t *dt = NULL;
H5T_order_t ret_value;
FUNC_ENTER_API(H5Tget_order, H5T_ORDER_ERROR)
H5TRACE1("To","i",type_id);
/* Check args */
if (NULL == (dt = H5I_object_verify(type_id,H5I_DATATYPE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5T_ORDER_ERROR, "not a data type")
while (dt->shared->parent)
dt = dt->shared->parent; /*defer to parent*/
if (!H5T_IS_ATOMIC(dt->shared))
HGOTO_ERROR(H5E_DATATYPE, H5E_UNSUPPORTED, H5T_ORDER_ERROR, "operation not defined for specified data type")
/* Order */
ret_value = dt->shared->u.atomic.order;
done:
FUNC_LEAVE_API(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5Tset_order
*
* Purpose: Sets the byte order for a data type.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Robb Matzke
* Wednesday, January 7, 1998
*
* Modifications:
* Robb Matzke, 22 Dec 1998
* Also works for derived data types.
*
*-------------------------------------------------------------------------
*/
herr_t
H5Tset_order(hid_t type_id, H5T_order_t order)
{
H5T_t *dt = NULL;
herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_API(H5Tset_order, FAIL)
H5TRACE2("e","iTo",type_id,order);
/* Check args */
if (NULL == (dt = H5I_object_verify(type_id,H5I_DATATYPE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type")
if (H5T_STATE_TRANSIENT!=dt->shared->state)
HGOTO_ERROR(H5E_ARGS, H5E_CANTINIT, FAIL, "data type is read-only")
if (order < H5T_ORDER_LE || order > H5T_ORDER_NONE)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "illegal byte order")
if (H5T_ENUM==dt->shared->type && dt->shared->u.enumer.nmembs>0)
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "operation not allowed after members are defined")
while (dt->shared->parent)
dt = dt->shared->parent; /*defer to parent*/
if (!H5T_IS_ATOMIC(dt->shared))
HGOTO_ERROR(H5E_DATATYPE, H5E_UNSUPPORTED, FAIL, "operation not defined for specified data type")
/* Commit */
dt->shared->u.atomic.order = order;
done:
FUNC_LEAVE_API(ret_value)
}
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