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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 COPYING file, which can be found at the root of the source code *
* distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. *
* 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 padding for the H5T interface.
*/
#include "H5Tmodule.h" /* This source code file is part of the H5T module */
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5Iprivate.h" /* IDs */
#include "H5Tpkg.h" /* Datatypes */
/*-------------------------------------------------------------------------
* Function: H5Tget_pad
*
* Purpose: Gets the least significant pad type and the most significant
* pad type and returns their values through the LSB and MSB
* arguments, either of which may be the null pointer.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Robb Matzke
* Friday, January 9, 1998
*
* Modifications:
* Robb Matzke, 22 Dec 1998
* Also works with derived data types.
*
*-------------------------------------------------------------------------
*/
herr_t
H5Tget_pad(hid_t type_id, H5T_pad_t *lsb/*out*/, H5T_pad_t *msb/*out*/)
{
H5T_t *dt = NULL;
herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE3("e", "ixx", type_id, lsb, msb);
/* Check args */
if (NULL == (dt = (H5T_t *)H5I_object_verify(type_id,H5I_DATATYPE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "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, FAIL, "operation not defined for specified data type")
/* Get values */
if (lsb)
*lsb = dt->shared->u.atomic.lsb_pad;
if (msb)
*msb = dt->shared->u.atomic.msb_pad;
done:
FUNC_LEAVE_API(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5Tset_pad
*
* Purpose: Sets the LSB and MSB pad types.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Robb Matzke
* Friday, January 9, 1998
*
* Modifications:
* Robb Matzke, 22 Dec 1998
* Also works with derived data types.
*
*-------------------------------------------------------------------------
*/
herr_t
H5Tset_pad(hid_t type_id, H5T_pad_t lsb, H5T_pad_t msb)
{
H5T_t *dt = NULL;
herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE3("e", "iTpTp", type_id, lsb, msb);
/* Check args */
if (NULL == (dt = (H5T_t *)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 (lsb < H5T_PAD_ZERO || lsb >= H5T_NPAD || msb < H5T_PAD_ZERO || msb >= H5T_NPAD)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid pad type")
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.lsb_pad = lsb;
dt->shared->u.atomic.msb_pad = msb;
done:
FUNC_LEAVE_API(ret_value)
}
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