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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* 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://www.hdfgroup.org/licenses. *
* 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 string 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_strpad
*
* Purpose: The method used to store character strings differs with the
* programming language: C usually null terminates strings while
* Fortran left-justifies and space-pads strings. This property
* defines the storage mechanism for the string.
*
* Return: Success: The character set of a string type.
*
* Failure: H5T_STR_ERROR (Negative)
*
*-------------------------------------------------------------------------
*/
H5T_str_t
H5Tget_strpad(hid_t type_id)
{
H5T_t *dt = NULL;
H5T_str_t ret_value;
FUNC_ENTER_API(H5T_STR_ERROR)
H5TRACE1("Tz", "i", type_id);
/* Check args */
if (NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5T_STR_ERROR, "not a datatype");
while (dt->shared->parent && !H5T_IS_STRING(dt->shared))
dt = dt->shared->parent; /*defer to parent*/
if (!H5T_IS_STRING(dt->shared))
HGOTO_ERROR(H5E_DATATYPE, H5E_UNSUPPORTED, H5T_STR_ERROR, "operation not defined for datatype class");
/* result */
if (H5T_IS_FIXED_STRING(dt->shared))
ret_value = dt->shared->u.atomic.u.s.pad;
else
ret_value = dt->shared->u.vlen.pad;
done:
FUNC_LEAVE_API(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5Tset_strpad
*
* Purpose: The method used to store character strings differs with the
* programming language: C usually null terminates strings while
* Fortran left-justifies and space-pads strings. This property
* defines the storage mechanism for the string.
*
* When converting from a long string to a short string if the
* short string is H5T_STR_NULLPAD or H5T_STR_SPACEPAD then the
* string is simply truncated; otherwise if the short string is
* H5T_STR_NULLTERM it will be truncated and a null terminator
* is appended.
*
* When converting from a short string to a long string, the
* long string is padded on the end by appending nulls or
* spaces.
*
* Return: Non-negative on success/Negative on failure
*
*-------------------------------------------------------------------------
*/
herr_t
H5Tset_strpad(hid_t type_id, H5T_str_t strpad)
{
H5T_t *dt = NULL;
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE2("e", "iTz", type_id, strpad);
/* Check args */
if (NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype");
if (H5T_STATE_TRANSIENT != dt->shared->state)
HGOTO_ERROR(H5E_ARGS, H5E_CANTINIT, FAIL, "datatype is read-only");
if (strpad < H5T_STR_NULLTERM || strpad >= H5T_NSTR)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "illegal string pad type");
while (dt->shared->parent && !H5T_IS_STRING(dt->shared))
dt = dt->shared->parent; /*defer to parent*/
if (!H5T_IS_STRING(dt->shared))
HGOTO_ERROR(H5E_DATATYPE, H5E_UNSUPPORTED, FAIL, "operation not defined for datatype class");
/* Commit */
if (H5T_IS_FIXED_STRING(dt->shared))
dt->shared->u.atomic.u.s.pad = strpad;
else
dt->shared->u.vlen.pad = strpad;
done:
FUNC_LEAVE_API(ret_value)
}
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