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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 fixed-point (i.e.
* integer) datatypes in 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" /*ID functions */
#include "H5Tpkg.h" /*data-type functions */
/*-------------------------------------------------------------------------
* Function: H5Tget_sign
*
* Purpose: Retrieves the sign type for an integer type.
*
* Return: Success: The sign type.
*
* Failure: H5T_SGN_ERROR (Negative)
*
* Programmer: Robb Matzke
* Wednesday, January 7, 1998
*
* Modifications:
* Robb Matzke, 22 Dec 1998
* Also works with derived datatypes.
*-------------------------------------------------------------------------
*/
H5T_sign_t
H5Tget_sign(hid_t type_id)
{
H5T_t *dt = NULL;
H5T_sign_t ret_value;
FUNC_ENTER_API(H5T_SGN_ERROR)
H5TRACE1("Ts", "i", type_id);
/* Check args */
if (NULL == (dt = (H5T_t *)H5I_object_verify(type_id,H5I_DATATYPE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5T_SGN_ERROR, "not an integer datatype")
ret_value = H5T_get_sign(dt);
done:
FUNC_LEAVE_API(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5T_get_sign
*
* Purpose: Private function for H5Tget_sign. Retrieves the sign type
* for an integer type.
*
* Return: Success: The sign type.
*
* Failure: H5T_SGN_ERROR (Negative)
*
* Programmer: Raymond Lu
* October 8, 2002
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
H5T_sign_t
H5T_get_sign(H5T_t const *dt)
{
H5T_sign_t ret_value = H5T_SGN_ERROR; /* Return value */
FUNC_ENTER_NOAPI(H5T_SGN_ERROR)
HDassert(dt);
/* Defer to parent */
while(dt->shared->parent)
dt = dt->shared->parent;
/* Check args */
if (H5T_INTEGER!=dt->shared->type)
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, H5T_SGN_ERROR, "operation not defined for datatype class")
/* Sign */
ret_value = dt->shared->u.atomic.u.i.sign;
done:
FUNC_LEAVE_NOAPI(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5Tset_sign
*
* Purpose: Sets the sign property for an integer.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Robb Matzke
* Wednesday, January 7, 1998
*
* Modifications:
* Robb Matzke, 22 Dec 1998
* Also works with derived datatypes.
*
*-------------------------------------------------------------------------
*/
herr_t
H5Tset_sign(hid_t type_id, H5T_sign_t sign)
{
H5T_t *dt = NULL;
herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE2("e", "iTs", type_id, sign);
/* Check args */
if (NULL == (dt = (H5T_t *)H5I_object_verify(type_id,H5I_DATATYPE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an integer datatype")
if (H5T_STATE_TRANSIENT!=dt->shared->state)
HGOTO_ERROR(H5E_ARGS, H5E_CANTINIT, FAIL, "datatype is read-only")
if (sign < H5T_SGN_NONE || sign >= H5T_NSGN)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "illegal sign 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_INTEGER!=dt->shared->type)
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "operation not defined for datatype class")
/* Commit */
dt->shared->u.atomic.u.i.sign = sign;
done:
FUNC_LEAVE_API(ret_value)
}
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