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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 floating-point
* 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_fields
*
* Purpose: Returns information about the locations of the various bit
* fields of a floating point datatype. The field positions
* are bit positions in the significant region of the datatype.
* Bits are numbered with the least significant bit number zero.
*
* Any (or even all) of the arguments can be null pointers.
*
* Return: Success: Non-negative, field locations and sizes are
* returned through the arguments.
*
* Failure: Negative
*
*-------------------------------------------------------------------------
*/
herr_t
H5Tget_fields(hid_t type_id, size_t *spos /*out*/, size_t *epos /*out*/, size_t *esize /*out*/,
size_t *mpos /*out*/, size_t *msize /*out*/)
{
H5T_t *dt; /* Datatype */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE6("e", "i*z*z*z*z*z", type_id, spos, epos, esize, mpos, msize);
/* Check args */
if (NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype");
while (dt->shared->parent)
dt = dt->shared->parent; /*defer to parent*/
if (H5T_FLOAT != dt->shared->type)
HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, FAIL, "operation not defined for datatype class");
/* Get values */
if (spos)
*spos = dt->shared->u.atomic.u.f.sign;
if (epos)
*epos = dt->shared->u.atomic.u.f.epos;
if (esize)
*esize = dt->shared->u.atomic.u.f.esize;
if (mpos)
*mpos = dt->shared->u.atomic.u.f.mpos;
if (msize)
*msize = dt->shared->u.atomic.u.f.msize;
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Tget_fields() */
/*-------------------------------------------------------------------------
* Function: H5Tset_fields
*
* Purpose: Sets the locations and sizes of the various floating point
* bit fields. The field positions are bit positions in the
* significant region of the datatype. Bits are numbered with
* the least significant bit number zero.
*
* Fields are not allowed to extend beyond the number of bits of
* precision, nor are they allowed to overlap with one another.
*
* Return: Non-negative on success/Negative on failure
*
*-------------------------------------------------------------------------
*/
herr_t
H5Tset_fields(hid_t type_id, size_t spos, size_t epos, size_t esize, size_t mpos, size_t msize)
{
H5T_t *dt; /* Datatype */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE6("e", "izzzzz", type_id, spos, epos, esize, mpos, msize);
/* Check args */
if (NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype");
if (H5T_STATE_TRANSIENT != dt->shared->state)
HGOTO_ERROR(H5E_ARGS, H5E_CANTSET, FAIL, "datatype is read-only");
while (dt->shared->parent)
dt = dt->shared->parent; /*defer to parent*/
if (H5T_FLOAT != dt->shared->type)
HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, FAIL, "operation not defined for datatype class");
if (epos + esize - dt->shared->u.atomic.offset > dt->shared->u.atomic.prec)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "exponent bit field size/location is invalid");
if (mpos + msize - dt->shared->u.atomic.offset > dt->shared->u.atomic.prec)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "mantissa bit field size/location is invalid");
if (spos - dt->shared->u.atomic.offset >= dt->shared->u.atomic.prec)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "sign location is not valid");
/* Check for overlap */
if (spos >= epos && spos < epos + esize)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "sign bit appears within exponent field");
if (spos >= mpos && spos < mpos + msize)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "sign bit appears within mantissa field");
if ((mpos < epos && mpos + msize > epos) || (epos < mpos && epos + esize > mpos))
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "exponent and mantissa fields overlap");
/* Commit */
dt->shared->u.atomic.u.f.sign = spos;
dt->shared->u.atomic.u.f.epos = epos;
dt->shared->u.atomic.u.f.mpos = mpos;
dt->shared->u.atomic.u.f.esize = esize;
dt->shared->u.atomic.u.f.msize = msize;
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Tset_fields() */
/*-------------------------------------------------------------------------
* Function: H5Tget_ebias
*
* Purpose: Retrieves the exponent bias of a floating-point type.
*
* Return: Success: The bias
*
* Failure: 0
*
*-------------------------------------------------------------------------
*/
size_t
H5Tget_ebias(hid_t type_id)
{
H5T_t *dt; /* Datatype */
size_t ret_value; /* Return value */
FUNC_ENTER_API(0)
H5TRACE1("z", "i", type_id);
/* Check args */
if (NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, 0, "not a datatype");
while (dt->shared->parent)
dt = dt->shared->parent; /*defer to parent*/
if (H5T_FLOAT != dt->shared->type)
HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, 0, "operation not defined for datatype class");
/* bias */
H5_CHECKED_ASSIGN(ret_value, size_t, dt->shared->u.atomic.u.f.ebias, uint64_t);
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Tget_ebias() */
/*-------------------------------------------------------------------------
* Function: H5Tset_ebias
*
* Purpose: Sets the exponent bias of a floating-point type.
*
* Return: Non-negative on success/Negative on failure
*
*-------------------------------------------------------------------------
*/
herr_t
H5Tset_ebias(hid_t type_id, size_t ebias)
{
H5T_t *dt; /* Datatype */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE2("e", "iz", type_id, ebias);
/* Check args */
if (NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype");
if (H5T_STATE_TRANSIENT != dt->shared->state)
HGOTO_ERROR(H5E_ARGS, H5E_CANTSET, FAIL, "datatype is read-only");
while (dt->shared->parent)
dt = dt->shared->parent; /*defer to parent*/
if (H5T_FLOAT != dt->shared->type)
HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, FAIL, "operation not defined for datatype class");
/* Commit */
dt->shared->u.atomic.u.f.ebias = ebias;
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Tset_ebias() */
/*-------------------------------------------------------------------------
* Function: H5Tget_norm
*
* Purpose: Returns the mantisssa normalization of a floating-point data
* type.
*
* Return: Success: Normalization ID
*
* Failure: H5T_NORM_ERROR (Negative)
*
*-------------------------------------------------------------------------
*/
H5T_norm_t
H5Tget_norm(hid_t type_id)
{
H5T_t *dt; /* Datatype */
H5T_norm_t ret_value; /* Return value */
FUNC_ENTER_API(H5T_NORM_ERROR)
H5TRACE1("Tn", "i", type_id);
/* Check args */
if (NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5T_NORM_ERROR, "not a datatype");
while (dt->shared->parent)
dt = dt->shared->parent; /*defer to parent*/
if (H5T_FLOAT != dt->shared->type)
HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, H5T_NORM_ERROR, "operation not defined for datatype class");
/* norm */
ret_value = dt->shared->u.atomic.u.f.norm;
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Tget_norm() */
/*-------------------------------------------------------------------------
* Function: H5Tset_norm
*
* Purpose: Sets the mantissa normalization method for a floating point
* datatype.
*
* Return: Non-negative on success/Negative on failure
*
*-------------------------------------------------------------------------
*/
herr_t
H5Tset_norm(hid_t type_id, H5T_norm_t norm)
{
H5T_t *dt; /* Datatype */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE2("e", "iTn", type_id, norm);
/* Check args */
if (NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype");
if (H5T_STATE_TRANSIENT != dt->shared->state)
HGOTO_ERROR(H5E_ARGS, H5E_CANTSET, FAIL, "datatype is read-only");
if (norm < H5T_NORM_IMPLIED || norm > H5T_NORM_NONE)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "illegal normalization");
while (dt->shared->parent)
dt = dt->shared->parent; /*defer to parent*/
if (H5T_FLOAT != dt->shared->type)
HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, FAIL, "operation not defined for datatype class");
/* Commit */
dt->shared->u.atomic.u.f.norm = norm;
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Tset_norm() */
/*-------------------------------------------------------------------------
* Function: H5Tget_inpad
*
* Purpose: If any internal bits of a floating point type are unused
* (that is, those significant bits which are not part of the
* sign, exponent, or mantissa) then they will be filled
* according to the value of this property.
*
* Return: Success: The internal padding type.
*
* Failure: H5T_PAD_ERROR (Negative)
*
*-------------------------------------------------------------------------
*/
H5T_pad_t
H5Tget_inpad(hid_t type_id)
{
H5T_t *dt; /* Datatype */
H5T_pad_t ret_value; /* Return value */
FUNC_ENTER_API(H5T_PAD_ERROR)
H5TRACE1("Tp", "i", type_id);
/* Check args */
if (NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5T_PAD_ERROR, "not a datatype");
while (dt->shared->parent)
dt = dt->shared->parent; /*defer to parent*/
if (H5T_FLOAT != dt->shared->type)
HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, H5T_PAD_ERROR, "operation not defined for datatype class");
/* pad */
ret_value = dt->shared->u.atomic.u.f.pad;
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Tget_inpad() */
/*-------------------------------------------------------------------------
* Function: H5Tset_inpad
*
* Purpose: If any internal bits of a floating point type are unused
* (that is, those significant bits which are not part of the
* sign, exponent, or mantissa) then they will be filled
* according to the value of this property.
*
* Return: Non-negative on success/Negative on failure
*
*-------------------------------------------------------------------------
*/
herr_t
H5Tset_inpad(hid_t type_id, H5T_pad_t pad)
{
H5T_t *dt; /* Datatype */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE2("e", "iTp", type_id, pad);
/* Check args */
if (NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype");
if (H5T_STATE_TRANSIENT != dt->shared->state)
HGOTO_ERROR(H5E_ARGS, H5E_CANTSET, FAIL, "datatype is read-only");
if (pad < H5T_PAD_ZERO || pad >= H5T_NPAD)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "illegal internal pad type");
while (dt->shared->parent)
dt = dt->shared->parent; /*defer to parent*/
if (H5T_FLOAT != dt->shared->type)
HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, FAIL, "operation not defined for datatype class");
/* Commit */
dt->shared->u.atomic.u.f.pad = pad;
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Tset_inpad() */
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