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Diffstat (limited to 'src/H5Torder.c')
| -rw-r--r-- | src/H5Torder.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/src/H5Torder.c b/src/H5Torder.c new file mode 100644 index 0000000..4e2f167 --- /dev/null +++ b/src/H5Torder.c @@ -0,0 +1,148 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * 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://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have * + * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. * + * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + +/* + * Module Info: This module contains the functionality for setting & querying + * the datatype byte order for the H5T interface. + */ + +#define H5T_PACKAGE /*suppress error about including H5Tpkg */ + +#include "H5private.h" /*generic functions */ +#include "H5Eprivate.h" /*error handling */ +#include "H5Iprivate.h" /*ID functions */ +#include "H5Tpkg.h" /*data-type functions */ + +#define PABLO_MASK H5Torder_mask + +/* Interface initialization */ +static int interface_initialize_g = 0; +#define INTERFACE_INIT H5T_init_order_interface +static herr_t H5T_init_order_interface(void); + + +/*-------------------------------------------------------------------------- +NAME + H5T_init_order_interface -- Initialize interface-specific information +USAGE + herr_t H5T_init_order_interface() + +RETURNS + Non-negative on success/Negative on failure +DESCRIPTION + Initializes any interface-specific data or routines. (Just calls + H5T_init_iterface currently). + +--------------------------------------------------------------------------*/ +static herr_t +H5T_init_order_interface(void) +{ + FUNC_ENTER_NOINIT(H5T_init_order_interface); + + FUNC_LEAVE_NOAPI(H5T_init_interface()); +} /* H5T_init_order_interface() */ + + +/*------------------------------------------------------------------------- + * Function: H5Tget_order + * + * Purpose: Returns the byte order of a data type. + * + * Return: Success: A byte order constant + * + * Failure: H5T_ORDER_ERROR (Negative) + * + * Programmer: Robb Matzke + * Wednesday, January 7, 1998 + * + * Modifications: + * Robb Matzke, 22 Dec 1998 + * Also works for derived data types. + * + *------------------------------------------------------------------------- + */ +H5T_order_t +H5Tget_order(hid_t type_id) +{ + H5T_t *dt = NULL; + H5T_order_t ret_value; + + FUNC_ENTER_API(H5Tget_order, H5T_ORDER_ERROR); + H5TRACE1("To","i",type_id); + + /* Check args */ + if (NULL == (dt = H5I_object_verify(type_id,H5I_DATATYPE))) + HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5T_ORDER_ERROR, "not a data type"); + + if (dt->parent) + dt = dt->parent; /*defer to parent*/ + if (H5T_COMPOUND==dt->type || H5T_OPAQUE==dt->type || H5T_ARRAY ==dt->type) + HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, H5T_ORDER_ERROR, "operation not defined for specified data type"); + + /* Order */ + assert(H5T_is_atomic(dt)); + ret_value = dt->u.atomic.order; + +done: + FUNC_LEAVE_API(ret_value); +} + + +/*------------------------------------------------------------------------- + * Function: H5Tset_order + * + * Purpose: Sets the byte order for a data type. + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: Robb Matzke + * Wednesday, January 7, 1998 + * + * Modifications: + * Robb Matzke, 22 Dec 1998 + * Also works for derived data types. + * + *------------------------------------------------------------------------- + */ +herr_t +H5Tset_order(hid_t type_id, H5T_order_t order) +{ + H5T_t *dt = NULL; + herr_t ret_value=SUCCEED; /* Return value */ + + FUNC_ENTER_API(H5Tset_order, FAIL); + H5TRACE2("e","iTo",type_id,order); + + /* Check args */ + if (NULL == (dt = H5I_object_verify(type_id,H5I_DATATYPE))) + HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type"); + if (H5T_STATE_TRANSIENT!=dt->state) + HGOTO_ERROR(H5E_ARGS, H5E_CANTINIT, FAIL, "data type is read-only"); + if (order < 0 || order > H5T_ORDER_NONE) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "illegal byte order"); + if (H5T_ENUM==dt->type && dt->u.enumer.nmembs>0) + HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "operation not allowed after members are defined"); + if (dt->parent) + dt = dt->parent; /*defer to parent*/ + if (H5T_COMPOUND==dt->type || H5T_OPAQUE==dt->type || H5T_ARRAY==dt->type) + HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, H5T_ORDER_ERROR, "operation not defined for specified data type"); + + /* Commit */ + assert(H5T_is_atomic(dt)); + dt->u.atomic.order = order; + +done: + FUNC_LEAVE_API(ret_value); +} + |