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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 Setup */
/****************/
#define H5O_FRIEND /*suppress error about including H5Opkg */
#include "H5Tmodule.h" /* This source code file is part of the H5T module */
/***********/
/* Headers */
/***********/
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5Iprivate.h" /* IDs */
#include "H5Opkg.h" /* Object headers */
#include "H5Tpkg.h" /* Datatypes */
/****************/
/* Local Macros */
/****************/
/******************/
/* Local Typedefs */
/******************/
/********************/
/* Local Prototypes */
/********************/
static htri_t H5O__dtype_isa(const H5O_t *loc);
static void *H5O__dtype_open(const H5G_loc_t *obj_loc, H5I_type_t *opened_type);
static void *H5O__dtype_create(H5F_t *f, void *_crt_info, H5G_loc_t *obj_loc);
static H5O_loc_t *H5O__dtype_get_oloc(hid_t obj_id);
/*********************/
/* Package Variables */
/*********************/
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
/* This message derives from H5O object class */
const H5O_obj_class_t H5O_OBJ_DATATYPE[1] = {{
H5O_TYPE_NAMED_DATATYPE, /* object type */
"named datatype", /* object name, for debugging */
NULL, /* get 'copy file' user data */
NULL, /* free 'copy file' user data */
H5O__dtype_isa, /* "isa" */
H5O__dtype_open, /* open an object of this class */
H5O__dtype_create, /* create an object of this class */
H5O__dtype_get_oloc, /* get an object header location for an object */
NULL, /* get the index & heap info for an object */
NULL /* flush an opened object of this class */
}};
/*-------------------------------------------------------------------------
* Function: H5O__dtype_isa
*
* Purpose: Determines if an object has the requisite messages for being
* a datatype.
*
* Return: Success: true if the required data type messages are
* present; false otherwise.
*
* Failure: FAIL if the existence of certain messages
* cannot be determined.
*
*-------------------------------------------------------------------------
*/
static htri_t
H5O__dtype_isa(const H5O_t *oh)
{
htri_t ret_value = FAIL; /* Return value */
FUNC_ENTER_PACKAGE
assert(oh);
if ((ret_value = H5O_msg_exists_oh(oh, H5O_DTYPE_ID)) < 0)
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to read object header");
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O__dtype_isa() */
/*-------------------------------------------------------------------------
* Function: H5O__dtype_open
*
* Purpose: Open a datatype at a particular location
*
* Return: Success: Open object identifier
* Failure: Negative
*
*-------------------------------------------------------------------------
*/
static void *
H5O__dtype_open(const H5G_loc_t *obj_loc, H5I_type_t *opened_type)
{
H5T_t *type = NULL; /* Datatype opened */
void *ret_value = NULL; /* Return value */
FUNC_ENTER_PACKAGE
assert(obj_loc);
*opened_type = H5I_DATATYPE;
/* Open the datatype */
if (NULL == (type = H5T_open(obj_loc)))
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTOPENOBJ, NULL, "unable to open datatype");
ret_value = (void *)type;
done:
if (NULL == ret_value)
if (type && H5T_close(type) < 0)
HDONE_ERROR(H5E_DATATYPE, H5E_CLOSEERROR, NULL, "unable to release datatype");
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O__dtype_open() */
/*-------------------------------------------------------------------------
* Function: H5O__dtype_create
*
* Purpose: Create a named datatype in a file
*
* Return: Success: Pointer to the named datatype data structure
* Failure: NULL
*
*-------------------------------------------------------------------------
*/
static void *
H5O__dtype_create(H5F_t *f, void *_crt_info, H5G_loc_t *obj_loc)
{
H5T_obj_create_t *crt_info = (H5T_obj_create_t *)_crt_info; /* Named datatype creation parameters */
void *ret_value = NULL; /* Return value */
FUNC_ENTER_PACKAGE
/* Sanity checks */
assert(f);
assert(crt_info);
assert(obj_loc);
/* Commit the type to the file */
if (H5T__commit(f, crt_info->dt, crt_info->tcpl_id) < 0)
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to commit datatype");
/* Set up the new named datatype's location */
if (NULL == (obj_loc->oloc = H5T_oloc(crt_info->dt)))
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "unable to get object location of named datatype");
if (NULL == (obj_loc->path = H5T_nameof(crt_info->dt)))
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "unable to get path of named datatype");
/* Set the return value */
ret_value = crt_info->dt;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O__dtype_create() */
/*-------------------------------------------------------------------------
* Function: H5O__dtype_get_oloc
*
* Purpose: Retrieve the object header location for an open object
*
* Return: Success: Pointer to object header location
* Failure: NULL
*
*-------------------------------------------------------------------------
*/
static H5O_loc_t *
H5O__dtype_get_oloc(hid_t obj_id)
{
H5T_t *type = NULL; /* Datatype opened */
H5T_t *dt = NULL;
H5O_loc_t *ret_value = NULL; /* Return value */
FUNC_ENTER_PACKAGE
/* Get the datatype */
if (NULL == (dt = (H5T_t *)H5I_object(obj_id)))
HGOTO_ERROR(H5E_OHDR, H5E_BADID, NULL, "couldn't get object from ID");
/* If this is a named datatype, get the VOL driver pointer to the datatype */
type = (H5T_t *)H5T_get_actual_type(dt);
/* Get the datatype's object header location */
if (NULL == (ret_value = H5T_oloc(type)))
HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "unable to get object location from object");
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O__dtype_get_oloc() */
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