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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 opaque
* 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" /* IDs */
#include "H5MMprivate.h" /* Memory management */
#include "H5Tpkg.h" /* Datatypes */
/*-------------------------------------------------------------------------
* Function: H5Tset_tag
*
* Purpose: Tag an opaque datatype with a unique ASCII identifier.
*
* Return: Non-negative on success/Negative on failure
*
*-------------------------------------------------------------------------
*/
herr_t
H5Tset_tag(hid_t type_id, const char *tag)
{
H5T_t *dt = NULL;
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE2("e", "i*s", type_id, tag);
/* 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");
while (dt->shared->parent)
dt = dt->shared->parent; /*defer to parent*/
if (H5T_OPAQUE != dt->shared->type)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an opaque data type");
if (!tag)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no tag");
if (strlen(tag) >= H5T_OPAQUE_TAG_MAX)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "tag too long");
/* Commit */
H5MM_xfree(dt->shared->u.opaque.tag);
dt->shared->u.opaque.tag = H5MM_strdup(tag);
done:
FUNC_LEAVE_API(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5Tget_tag
*
* Purpose: Get the tag associated with an opaque datatype.
*
* Return: A pointer to an allocated string. The caller should free
* the string. NULL is returned for errors.
*
*-------------------------------------------------------------------------
*/
char *
H5Tget_tag(hid_t type_id)
{
H5T_t *dt = NULL;
char *ret_value;
FUNC_ENTER_API(NULL)
H5TRACE1("*s", "i", type_id);
/* Check args */
if (NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not a data type");
while (dt->shared->parent)
dt = dt->shared->parent; /*defer to parent*/
if (H5T_OPAQUE != dt->shared->type)
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "operation not defined for data type class");
/* result */
if (NULL == (ret_value = H5MM_strdup(dt->shared->u.opaque.tag)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed");
done:
FUNC_LEAVE_API(ret_value)
}
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