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235 lines
7.2 KiB
C
235 lines
7.2 KiB
C
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Copyright by The HDF Group. *
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* Copyright by the Board of Trustees of the University of Illinois. *
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* All rights reserved. *
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* *
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* This file is part of HDF5. The full HDF5 copyright notice, including *
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* terms governing use, modification, and redistribution, is contained in *
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* the COPYING file, which can be found at the root of the source code *
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* distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. *
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* If you do not have access to either file, you may request a copy from *
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* help@hdfgroup.org. *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/****************/
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/* Module Setup */
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/****************/
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#define H5O_FRIEND /*suppress error about including H5Opkg */
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#include "H5Tmodule.h" /* This source code file is part of the H5T module */
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/***********/
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/* Headers */
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/***********/
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#include "H5private.h" /* Generic Functions */
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#include "H5Eprivate.h" /* Error handling */
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#include "H5Iprivate.h" /* IDs */
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#include "H5Opkg.h" /* Object headers */
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#include "H5Tpkg.h" /* Datatypes */
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/****************/
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/* Local Macros */
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/****************/
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/******************/
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/* Local Typedefs */
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/******************/
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/********************/
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/* Local Prototypes */
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/********************/
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static htri_t H5O__dtype_isa(const H5O_t *loc);
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static void *H5O__dtype_open(const H5G_loc_t *obj_loc, H5I_type_t *opened_type);
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static void *H5O__dtype_create(H5F_t *f, void *_crt_info, H5G_loc_t *obj_loc);
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static H5O_loc_t *H5O__dtype_get_oloc(hid_t obj_id);
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/*********************/
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/* Package Variables */
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/*********************/
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/*****************************/
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/* Library Private Variables */
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/*****************************/
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/*******************/
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/* Local Variables */
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/*******************/
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/* This message derives from H5O object class */
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const H5O_obj_class_t H5O_OBJ_DATATYPE[1] = {{
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H5O_TYPE_NAMED_DATATYPE, /* object type */
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"named datatype", /* object name, for debugging */
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NULL, /* get 'copy file' user data */
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NULL, /* free 'copy file' user data */
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H5O__dtype_isa, /* "isa" */
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H5O__dtype_open, /* open an object of this class */
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H5O__dtype_create, /* create an object of this class */
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H5O__dtype_get_oloc, /* get an object header location for an object */
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NULL, /* get the index & heap info for an object */
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NULL /* flush an opened object of this class */
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}};
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/*-------------------------------------------------------------------------
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* Function: H5O__dtype_isa
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*
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* Purpose: Determines if an object has the requisite messages for being
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* a datatype.
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*
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* Return: Success: TRUE if the required data type messages are
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* present; FALSE otherwise.
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*
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* Failure: FAIL if the existence of certain messages
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* cannot be determined.
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*
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* Programmer: Robb Matzke
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* Monday, November 2, 1998
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*
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*-------------------------------------------------------------------------
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*/
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static htri_t
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H5O__dtype_isa(const H5O_t *oh)
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{
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htri_t ret_value = FAIL; /* Return value */
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FUNC_ENTER_STATIC
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HDassert(oh);
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if((ret_value = H5O_msg_exists_oh(oh, H5O_DTYPE_ID)) < 0)
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HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to read object header")
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done:
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FUNC_LEAVE_NOAPI(ret_value)
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} /* end H5O__dtype_isa() */
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/*-------------------------------------------------------------------------
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* Function: H5O__dtype_open
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*
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* Purpose: Open a datatype at a particular location
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*
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* Return: Success: Open object identifier
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* Failure: Negative
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*
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* Programmer: Quincey Koziol
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* Monday, November 6, 2006
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*
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*-------------------------------------------------------------------------
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*/
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static void *
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H5O__dtype_open(const H5G_loc_t *obj_loc, H5I_type_t *opened_type)
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{
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H5T_t *type = NULL; /* Datatype opened */
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void *ret_value = NULL; /* Return value */
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FUNC_ENTER_STATIC
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HDassert(obj_loc);
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*opened_type = H5I_DATATYPE;
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/* Open the datatype */
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if(NULL == (type = H5T_open(obj_loc)))
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HGOTO_ERROR(H5E_DATATYPE, H5E_CANTOPENOBJ, NULL, "unable to open datatype")
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ret_value = (void *)type;
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done:
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if(NULL == ret_value)
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if(type && H5T_close(type) < 0)
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HDONE_ERROR(H5E_DATATYPE, H5E_CLOSEERROR, NULL, "unable to release datatype")
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FUNC_LEAVE_NOAPI(ret_value)
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} /* end H5O__dtype_open() */
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/*-------------------------------------------------------------------------
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* Function: H5O__dtype_create
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*
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* Purpose: Create a named datatype in a file
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*
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* Return: Success: Pointer to the named datatype data structure
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* Failure: NULL
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*
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* Programmer: Quincey Koziol
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* Wednesday, April 11, 2007
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*
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*-------------------------------------------------------------------------
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*/
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static void *
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H5O__dtype_create(H5F_t *f, void *_crt_info, H5G_loc_t *obj_loc)
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{
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H5T_obj_create_t *crt_info = (H5T_obj_create_t *)_crt_info; /* Named datatype creation parameters */
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void *ret_value = NULL; /* Return value */
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FUNC_ENTER_STATIC
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/* Sanity checks */
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HDassert(f);
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HDassert(crt_info);
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HDassert(obj_loc);
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/* Commit the type to the file */
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if(H5T__commit(f, crt_info->dt, crt_info->tcpl_id) < 0)
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HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to commit datatype")
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/* Set up the new named datatype's location */
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if(NULL == (obj_loc->oloc = H5T_oloc(crt_info->dt)))
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HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "unable to get object location of named datatype")
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if(NULL == (obj_loc->path = H5T_nameof(crt_info->dt)))
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HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "unable to get path of named datatype")
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/* Set the return value */
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ret_value = crt_info->dt;
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done:
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FUNC_LEAVE_NOAPI(ret_value)
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} /* end H5O__dtype_create() */
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/*-------------------------------------------------------------------------
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* Function: H5O__dtype_get_oloc
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*
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* Purpose: Retrieve the object header location for an open object
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*
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* Return: Success: Pointer to object header location
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* Failure: NULL
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*
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* Programmer: Quincey Koziol
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* Monday, November 6, 2006
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*
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*-------------------------------------------------------------------------
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*/
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static H5O_loc_t *
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H5O__dtype_get_oloc(hid_t obj_id)
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{
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H5T_t *type = NULL; /* Datatype opened */
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H5T_t *dt = NULL;
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H5O_loc_t *ret_value = NULL; /* Return value */
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FUNC_ENTER_STATIC
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/* Get the datatype */
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if(NULL == (dt = (H5T_t *)H5I_object(obj_id)))
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HGOTO_ERROR(H5E_OHDR, H5E_BADATOM, NULL, "couldn't get object from ID")
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/* If this is a named datatype, get the VOL driver pointer to the datatype */
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type = (H5T_t *)H5T_get_actual_type(dt);
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/* Get the datatype's object header location */
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if(NULL == (ret_value = H5T_oloc(type)))
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HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "unable to get object location from object")
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done:
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FUNC_LEAVE_NOAPI(ret_value)
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} /* end H5O__dtype_get_oloc() */
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