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Diffstat (limited to 'src/H5Tfixed.c')
| -rw-r--r-- | src/H5Tfixed.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/src/H5Tfixed.c b/src/H5Tfixed.c new file mode 100644 index 0000000..bc1d84d --- /dev/null +++ b/src/H5Tfixed.c @@ -0,0 +1,153 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * Copyright by The HDF Group. * + * 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 COPYING file, which can be found at the root of the source code * + * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. * + * 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 fixed-point (i.e. + * integer) 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" /*ID functions */ +#include "H5Tpkg.h" /*data-type functions */ + + +/*------------------------------------------------------------------------- + * Function: H5Tget_sign + * + * Purpose: Retrieves the sign type for an integer type. + * + * Return: Success: The sign type. + * + * Failure: H5T_SGN_ERROR (Negative) + * + * Programmer: Robb Matzke + * Wednesday, January 7, 1998 + * + * Modifications: + * Robb Matzke, 22 Dec 1998 + * Also works with derived datatypes. + *------------------------------------------------------------------------- + */ +H5T_sign_t +H5Tget_sign(hid_t type_id) +{ + H5T_t *dt = NULL; + H5T_sign_t ret_value; + + FUNC_ENTER_API(H5T_SGN_ERROR) + H5TRACE1("Ts", "i", type_id); + + /* Check args */ + if (NULL == (dt = (H5T_t *)H5I_object_verify(type_id,H5I_DATATYPE))) + HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5T_SGN_ERROR, "not an integer datatype") + + ret_value = H5T_get_sign(dt); + +done: + FUNC_LEAVE_API(ret_value) +} + + +/*------------------------------------------------------------------------- + * Function: H5T_get_sign + * + * Purpose: Private function for H5Tget_sign. Retrieves the sign type + * for an integer type. + * + * Return: Success: The sign type. + * + * Failure: H5T_SGN_ERROR (Negative) + * + * Programmer: Raymond Lu + * October 8, 2002 + * + * Modifications: + * + *------------------------------------------------------------------------- + */ +H5T_sign_t +H5T_get_sign(H5T_t const *dt) +{ + H5T_sign_t ret_value = H5T_SGN_ERROR; /* Return value */ + + FUNC_ENTER_NOAPI(H5T_SGN_ERROR) + + HDassert(dt); + + /* Defer to parent */ + while(dt->shared->parent) + dt = dt->shared->parent; + + /* Check args */ + if (H5T_INTEGER!=dt->shared->type) + HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, H5T_SGN_ERROR, "operation not defined for datatype class") + + /* Sign */ + ret_value = dt->shared->u.atomic.u.i.sign; + +done: + FUNC_LEAVE_NOAPI(ret_value) +} + + + +/*------------------------------------------------------------------------- + * Function: H5Tset_sign + * + * Purpose: Sets the sign property for an integer. + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: Robb Matzke + * Wednesday, January 7, 1998 + * + * Modifications: + * Robb Matzke, 22 Dec 1998 + * Also works with derived datatypes. + * + *------------------------------------------------------------------------- + */ +herr_t +H5Tset_sign(hid_t type_id, H5T_sign_t sign) +{ + H5T_t *dt = NULL; + herr_t ret_value=SUCCEED; /* Return value */ + + FUNC_ENTER_API(FAIL) + H5TRACE2("e", "iTs", type_id, sign); + + /* Check args */ + if (NULL == (dt = (H5T_t *)H5I_object_verify(type_id,H5I_DATATYPE))) + HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an integer datatype") + if (H5T_STATE_TRANSIENT!=dt->shared->state) + HGOTO_ERROR(H5E_ARGS, H5E_CANTINIT, FAIL, "datatype is read-only") + if (sign < H5T_SGN_NONE || sign >= H5T_NSGN) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "illegal sign type") + if (H5T_ENUM==dt->shared->type && dt->shared->u.enumer.nmembs>0) + HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "operation not allowed after members are defined") + while (dt->shared->parent) + dt = dt->shared->parent; /*defer to parent*/ + if (H5T_INTEGER!=dt->shared->type) + HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "operation not defined for datatype class") + + /* Commit */ + dt->shared->u.atomic.u.i.sign = sign; + +done: + FUNC_LEAVE_API(ret_value) +} + |