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
|
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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 setting & querying
* the datatype byte order for the H5T interface.
*/
/****************/
/* Module Setup */
/****************/
#include "H5Tmodule.h" /* This source code file is part of the H5T module */
/***********/
/* Headers */
/***********/
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5Iprivate.h" /* IDs */
#include "H5Tpkg.h" /* Datatypes */
/****************/
/* Local Macros */
/****************/
/******************/
/* Local Typedefs */
/******************/
/********************/
/* Package Typedefs */
/********************/
/********************/
/* Local Prototypes */
/********************/
static herr_t H5T__set_order(H5T_t *dtype, H5T_order_t order);
/*********************/
/* Public Variables */
/*********************/
/*********************/
/* Package Variables */
/*********************/
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
/*-------------------------------------------------------------------------
* Function: H5Tget_order
*
* Purpose: Returns the byte order of a datatype.
*
* Return: Success: A byte order constant. If the type is compound
* and its members have mixed orders, this function
* returns H5T_ORDER_MIXED.
* Failure: H5T_ORDER_ERROR (Negative)
*
*-------------------------------------------------------------------------
*/
H5T_order_t
H5Tget_order(hid_t type_id)
{
H5T_t *dt; /* Datatype to query */
H5T_order_t ret_value; /* Return value */
FUNC_ENTER_API(H5T_ORDER_ERROR)
H5TRACE1("To", "i", type_id);
/* Check args */
if (NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, H5T_ORDER_ERROR, "not a datatype");
/* Get order */
if (H5T_ORDER_ERROR == (ret_value = H5T_get_order(dt)))
HGOTO_ERROR(H5E_DATATYPE, H5E_UNSUPPORTED, H5T_ORDER_ERROR, "can't get order for specified datatype");
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Tget_order() */
/*-------------------------------------------------------------------------
* Function: H5T_get_order
*
* Purpose: Returns the byte order of a datatype.
*
* Return: Success: A byte order constant
* Failure: H5T_ORDER_ERROR (Negative)
*
*-------------------------------------------------------------------------
*/
H5T_order_t
H5T_get_order(const H5T_t *dtype)
{
H5T_order_t ret_value = H5T_ORDER_NONE; /* Return value */
FUNC_ENTER_NOAPI(H5T_ORDER_ERROR)
/* Defer to parent */
while (dtype->shared->parent)
dtype = dtype->shared->parent;
/* Set order for atomic type. */
if (H5T_IS_ATOMIC(dtype->shared))
ret_value = dtype->shared->u.atomic.order;
else {
/* Check for compound datatype */
if (H5T_COMPOUND == dtype->shared->type) {
H5T_order_t memb_order = H5T_ORDER_NONE;
int nmemb; /* Number of members in compound & enum types */
int i; /* Local index variable */
/* Retrieve the number of members */
if ((nmemb = H5T_get_nmembers(dtype)) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5T_ORDER_ERROR,
"can't get number of members from compound data type");
/* Get order for each compound member type. */
for (i = 0; i < nmemb; i++) {
/* Get order for member */
if ((memb_order = H5T_get_order(dtype->shared->u.compnd.memb[i].type)) == H5T_ORDER_ERROR)
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, H5T_ORDER_ERROR,
"can't get order for compound member");
/* Ignore the H5T_ORDER_NONE, write down the first non H5T_ORDER_NONE order. */
if (memb_order != H5T_ORDER_NONE && ret_value == H5T_ORDER_NONE)
ret_value = memb_order;
/* If the orders are mixed, stop the loop and report it.
* (H5T_ORDER_NONE is ignored)
*/
if (memb_order != H5T_ORDER_NONE && ret_value != H5T_ORDER_NONE && memb_order != ret_value) {
ret_value = H5T_ORDER_MIXED;
break;
} /* end if */
} /* end for */
} /* end if */
} /* end else */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5T_get_order() */
/*-------------------------------------------------------------------------
* Function: H5Tset_order
*
* Purpose: Sets the byte order for a datatype.
*
* Notes: There are some restrictions on this operation:
* 1. For enum type, members shouldn't be defined yet.
* 2. H5T_ORDER_NONE only works for reference and fixed-length
* string.
* 3. For opaque type, the order will be ignored.
* 4. For compound type, all restrictions above apply to the
* members.
*
* Return: Non-negative on success/Negative on failure
*
*-------------------------------------------------------------------------
*/
herr_t
H5Tset_order(hid_t type_id, H5T_order_t order)
{
H5T_t *dt = NULL; /* Datatype to modify */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE2("e", "iTo", type_id, order);
/* Check args */
if (NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, FAIL, "not a datatype");
if (order < H5T_ORDER_LE || order > H5T_ORDER_NONE || order == H5T_ORDER_MIXED)
HGOTO_ERROR(H5E_DATATYPE, H5E_BADVALUE, FAIL, "illegal byte order");
if (NULL != dt->vol_obj)
HGOTO_ERROR(H5E_ARGS, H5E_CANTSET, FAIL, "datatype is already committed");
if (H5T_STATE_TRANSIENT != dt->shared->state)
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "datatype is read-only");
/* Call internal routine to set the order */
if (H5T__set_order(dt, order) < 0)
HGOTO_ERROR(H5E_DATATYPE, H5E_UNSUPPORTED, FAIL, "can't set order");
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Tset_order() */
/*-------------------------------------------------------------------------
* Function: H5T__set_order
*
* Purpose: Private function to set the byte order for a datatype.
*
* Return: Non-negative on success/Negative on failure
*
*-------------------------------------------------------------------------
*/
static herr_t
H5T__set_order(H5T_t *dtype, H5T_order_t order)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_PACKAGE
if (H5T_ENUM == dtype->shared->type && dtype->shared->u.enumer.nmembs > 0)
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTSET, FAIL, "operation not allowed after enum members are defined");
/* For derived data type, defer to parent */
while (dtype->shared->parent)
dtype = dtype->shared->parent;
/* Check for setting order on inappropriate datatype */
if (order == H5T_ORDER_NONE && !(H5T_REFERENCE == dtype->shared->type ||
H5T_OPAQUE == dtype->shared->type || H5T_IS_FIXED_STRING(dtype->shared)))
HGOTO_ERROR(H5E_DATATYPE, H5E_BADVALUE, FAIL, "illegal byte order for type");
/* For atomic data type */
if (H5T_IS_ATOMIC(dtype->shared))
dtype->shared->u.atomic.order = order;
else {
/* Check for compound datatype */
if (H5T_COMPOUND == dtype->shared->type) {
int nmemb; /* Number of members in type */
int i; /* Local index variable */
/* Retrieve the number of fields in the compound datatype */
if ((nmemb = H5T_get_nmembers(dtype)) < 0)
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL,
"can't get number of members from compound data type");
/* Check for uninitialized compound datatype */
if (nmemb == 0)
HGOTO_ERROR(H5E_DATATYPE, H5E_UNINITIALIZED, FAIL, "no member is in the compound data type");
/* Loop through all fields of compound type, setting the order */
for (i = 0; i < nmemb; i++)
if (H5T__set_order(dtype->shared->u.compnd.memb[i].type, order) < 0)
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTSET, FAIL, "can't set order for compound member");
} /* end if */
} /* end else */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5T__set_order() */
|
