1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
|
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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", "ixxxxx", 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.prec)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "exponent bit field size/location is invalid");
if (mpos + msize > 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.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() */
|
