summaryrefslogtreecommitdiffstats
path: root/src/H5Sselect.c
blob: 8c45deb1c00859bd0c1a52687e68ca26c179a5dc (plain)
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
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
/*
 * Copyright (C) 1998 NCSA
 *                    All rights reserved.
 *
 * Programmer:  Quincey Koziol <koziol@ncsa.uiuc.ued>
 *              Friday, May 29, 1998
 *
 * Purpose:	Dataspace functions.
 */

#include <H5private.h>
#include <H5Eprivate.h>
#include <H5Iprivate.h>
#include <H5MMprivate.h>
#include <H5Sprivate.h>
#include <H5Vprivate.h>

/* Interface initialization */
#define PABLO_MASK      H5S_select_mask
#define INTERFACE_INIT  H5S_select_init
static intn             interface_initialize_g = FALSE;
static herr_t		    H5S_select_init(void);
static void		        H5S_select_term(void);


/*--------------------------------------------------------------------------
 NAME
    H5S_select_init
 PURPOSE
    Initialize selection interface
 USAGE
   herr_t  H5S_select_init(void)
 RETURNS
    SUCCEED/FAIL
 DESCRIPTION
 GLOBAL VARIABLES
 COMMENTS, BUGS, ASSUMPTIONS
 EXAMPLES
 REVISION LOG
--------------------------------------------------------------------------*/
herr_t
H5S_select_init (void)
{
    herr_t		    ret_value = SUCCEED;
    FUNC_ENTER (H5S_select_init, FAIL);

    /* Register the atexit function for this (sub)interface */
    ret_value = H5_add_exit(&H5S_select_term);
    FUNC_LEAVE(ret_value);
}

/*--------------------------------------------------------------------------
 NAME
    H5S_select_term
 PURPOSE
    Terminate various H5S selection objects and free lists
 USAGE
    void H5S_select_term()
 RETURNS
    SUCCEED/FAIL
 DESCRIPTION
    Release the selection resources allocated.
 GLOBAL VARIABLES
 COMMENTS, BUGS, ASSUMPTIONS
     Can't report errors...
 EXAMPLES
 REVISION LOG
--------------------------------------------------------------------------*/
static void
H5S_select_term(void)
{
}

/*--------------------------------------------------------------------------
 NAME
    H5S_select_copy
 PURPOSE
    Copy a selection from one dataspace to another
 USAGE
    herr_t H5S_select_copy(dst, src)
        H5S_t *dst;  OUT: Pointer to the destination dataspace
        H5S_t *src;  IN: Pointer to the source dataspace
 RETURNS
    SUCCEED/FAIL
 DESCRIPTION
    Copies all the selection information (include offset) from the source
    dataspace to the destination dataspace.
 GLOBAL VARIABLES
 COMMENTS, BUGS, ASSUMPTIONS
 EXAMPLES
 REVISION LOG
--------------------------------------------------------------------------*/
herr_t
H5S_select_copy (H5S_t *dst, const H5S_t *src)
{
    FUNC_ENTER (H5S_select_copy, FAIL);

    /* Check args */
    assert(dst);
    assert(src);


    /* Perform correct type of copy based on the type of selection */

    FUNC_LEAVE (SUCCEED);
}   /* H5S_select_copy() */

/*--------------------------------------------------------------------------
 NAME
    H5S_select_release
 PURPOSE
    Release selection information for a dataspace
 USAGE
    herr_t H5S_select_release(space)
        H5S_t *space;       IN: Pointer to dataspace
 RETURNS
    SUCCEED/FAIL
 DESCRIPTION
    Releases all selection information for a dataspace
 GLOBAL VARIABLES
 COMMENTS, BUGS, ASSUMPTIONS
 EXAMPLES
 REVISION LOG
--------------------------------------------------------------------------*/
herr_t
H5S_select_release (H5S_t *space)
{
    herr_t ret_value;     /* return value */

    FUNC_ENTER (H5S_select_release, FAIL);

    /* Check args */
    assert (space);

    switch(space->select.type) {
        case H5S_SEL_POINTS:         /* Sequence of points selected */
            ret_value=H5S_point_release(space);
            break;

        case H5S_SEL_HYPERSLABS:     /* Hyperslab selection defined */
            ret_value=H5S_hyper_release(space);
            break;

        case H5S_SEL_ALL:            /* Entire extent selected */
            ret_value=H5S_all_release(space);
            break;

        case H5S_SEL_NONE:           /* Nothing selected */
            break;
    } /* end switch() */

    FUNC_LEAVE (ret_value);
}   /* H5S_select_release() */

/*--------------------------------------------------------------------------
 NAME
    H5Sselect_hyperslab
 PURPOSE
    Specify a hyperslab to combine with the current hyperslab selection
 USAGE
    herr_t H5Sselect_hyperslab(dsid, op, start, stride, count, block)
        hid_t dsid;             IN: Dataspace ID of selection to modify
        H5S_seloper_t op;       IN: Operation to perform on current selection
        const hssize_t *start;        IN: Offset of start of hyperslab
        const hssize_t *stride;       IN: Hyperslab stride
        const hssize_t *count;        IN: Number of blocks included in hyperslab
        const hssize_t *block;        IN: Size of block in hyperslab
 RETURNS
    SUCCEED/FAIL
 DESCRIPTION
    Combines a hyperslab selection with the current selection for a dataspace.
    If the current selection is not a hyperslab, it is freed and the hyperslab
    parameters passed in are combined with the H5S_SEL_ALL hyperslab (ie. a
    selection composing the entire current extent).  Currently, only the
    H5S_SELECT_SET operation is supported.  If STRIDE or BLOCK is NULL, they
    are assumed to be set to all '1'.
 GLOBAL VARIABLES
 COMMENTS, BUGS, ASSUMPTIONS
 EXAMPLES
 REVISION LOG
--------------------------------------------------------------------------*/
herr_t
H5Sselect_hyperslab (hid_t spaceid, H5S_seloper_t op,
    const hssize_t *start, const hsize_t *_stride, const hsize_t *count,
    const hsize_t *_block)
{
    H5S_t	*space = NULL;  /* Dataspace to modify selection of */
    hsize_t *stride,  /* Stride array */
        *block;             /* Block size array */
    uintn contig;           /* whether selection is contiguous or not */
    int i;                  /* Counters */
    herr_t ret_value=FAIL;  /* return value */

    FUNC_ENTER (H5Sselect_hyperslab, FAIL);
    H5TRACE6("e","iSs*Hs*h*h*h",spaceid,op,start,_stride,count,_block);

    /* Check args */
    if (H5_DATASPACE != H5I_group(spaceid) ||
            NULL == (space=H5I_object(spaceid))) {
        HRETURN_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data space");
    }
    if(start==NULL || count==NULL) {
        HRETURN_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "hyperslab not specified");
    } /* end if */
    if(op!=H5S_SELECT_SET) {
        HRETURN_ERROR(H5E_ARGS, H5E_UNSUPPORTED, FAIL,
            "operations other than H5S_SELECT_SET not supported currently");
    } /* end if */

    /* Fill in the correct stride values */
    if(_stride==NULL) {
        hssize_t fill=1;

        if((stride = H5MM_malloc(sizeof(hssize_t)*space->extent.u.simple.rank))==NULL)
            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL,
                "can't allocate stride vector");
        H5V_array_fill(stride,&fill,sizeof(hssize_t),space->extent.u.simple.rank);
    } else {
        stride=(hsize_t *)_stride;
    } /* end else */

    /* Fill in the correct block values */
    if(_block==NULL) {
        hssize_t fill=1;

        if((block = H5MM_malloc(sizeof(hssize_t)*space->extent.u.simple.rank))==NULL)
            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL,
                "can't allocate stride vector");
        H5V_array_fill(block,&fill,sizeof(hssize_t),space->extent.u.simple.rank);
    } else {
        block=(hsize_t *)_block;
    } /* end else */

/* Check for overlapping blocks (remove when real block-merging algorithm is in place) */
if(op==H5S_SELECT_SET && _block!=NULL) {
    for(i=0; i<space->extent.u.simple.rank; i++) {
        if(stride[i]<block[i]) {
            HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL,
                "hyperslab blocks overlap");
        } /* end if */
    } /* end for */
} /* end if */

    /* Determine if selection is contiguous */
    contig=1;       /* assume hyperslab is contiguous, until proven otherwise */
    for(i=0; i<space->extent.u.simple.rank; i++) {
        /* contiguous hyperslabs have the block size equal to the stride */
        if(stride[i]!=block[i]) {
            contig=0;   /* hyperslab isn't contiguous */
            break;      /* no use looking further */
        } /* end if */
    } /* end for */

#ifdef QAK
printf("%s: check 1.0\n",FUNC);
#endif /* QAK */
    /* If we are setting a new selection, remove current selection first */
    if(op==H5S_SELECT_SET) {
        if(H5S_select_release(space)<0) {
            HGOTO_ERROR(H5E_DATASPACE, H5E_CANTDELETE, FAIL,
                "can't release hyperslab");
        } /* end if */
    } /* end if */

#ifdef QAK
printf("%s: check 2.0\n",FUNC);
#endif /* QAK */
    /* Allocate space for the hyperslab selection information if necessary */
    if(space->select.type!=H5S_SEL_HYPERSLABS || space->select.sel_info.hyper_lst==NULL) {
        if((space->select.sel_info.hyper_lst = H5MM_calloc(sizeof(H5S_hyper_list_t)))==NULL)
            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL,
                "can't allocate hyperslab information");
        if((space->select.sel_info.hyper_lst->lo_bounds = H5MM_calloc(space->extent.u.simple.rank*sizeof(H5S_hyper_bound_t *)))==NULL)
            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL,
                "can't allocate hyperslab lo bound information");
        if((space->select.sel_info.hyper_lst->hi_bounds = H5MM_calloc(space->extent.u.simple.rank*sizeof(H5S_hyper_bound_t *)))==NULL)
            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL,
                "can't allocate hyperslab lo bound information");
    } /* end if */

#ifdef QAK
printf("%s: check 3.0\n",FUNC);
#endif /* QAK */
    /* Add hyperslab to selection */
    if(contig) { /* Check for trivial case */
        if(H5S_hyper_add(space,start,count)<0) {
            HGOTO_ERROR(H5E_DATASPACE, H5E_CANTINSERT, FAIL,
                "can't insert hyperslab");
        }
    } else {
/* Generate list of blocks to add/remove based on selection operation */
/* Add/Remove blocks to/from selection */
        assert("complex hyperslabs not supported yet" && 0);
    } /* end if */

    /* Set selection type */
    space->select.type=H5S_SEL_HYPERSLABS;
    ret_value=SUCCEED;
#ifdef QAK
printf("%s: check 4.0\n",FUNC);
#endif /* QAK */

done:
    if(_stride==NULL && stride!=NULL)
        H5MM_xfree(stride);
    if(_block==NULL && block!=NULL)
        H5MM_xfree(block);

    FUNC_LEAVE (ret_value);
}   /* H5Sselect_hyperslab() */

/*--------------------------------------------------------------------------
 NAME
    H5Sselect_npoints
 PURPOSE
    Get the number of elements in current selection
 USAGE
    hsize_t H5Sselect_npoints(dsid)
        hid_t dsid;             IN: Dataspace ID of selection to query
 RETURNS
    The number of elements in selection on success, 0 on failure
 DESCRIPTION
    Returns the number of elements in current selection for dataspace.
 GLOBAL VARIABLES
 COMMENTS, BUGS, ASSUMPTIONS
 EXAMPLES
 REVISION LOG
--------------------------------------------------------------------------*/
hsize_t
H5Sselect_npoints (hid_t spaceid)
{
    H5S_t	*space = NULL;      /* Dataspace to modify selection of */
    hsize_t ret_value=0;        /* return value */

    FUNC_ENTER (H5Sselect_npoints, 0);
    H5TRACE1("h","i",spaceid);

    /* Check args */
    if (H5_DATASPACE != H5I_group(spaceid) ||
            NULL == (space=H5I_object(spaceid))) {
        HRETURN_ERROR(H5E_ARGS, H5E_BADTYPE, 0, "not a data space");
    }

    ret_value = H5S_select_npoints(space);

    FUNC_LEAVE (ret_value);
}   /* H5Sselect_npoints() */

/*--------------------------------------------------------------------------
 NAME
    H5S_select_npoints
 PURPOSE
    Get the number of elements in current selection
 USAGE
    herr_t H5Sselect_hyperslab(ds)
        H5S_t *ds;             IN: Dataspace pointer
 RETURNS
    The number of elements in selection on success, 0 on failure
 DESCRIPTION
    Returns the number of elements in current selection for dataspace.
 GLOBAL VARIABLES
 COMMENTS, BUGS, ASSUMPTIONS
 EXAMPLES
 REVISION LOG
--------------------------------------------------------------------------*/
hsize_t
H5S_select_npoints (const H5S_t *space)
{
    herr_t ret_value=FAIL;  /* return value */

    FUNC_ENTER (H5Sselect_npoints, FAIL);

    assert(space);

    switch(space->select.type) {
        case H5S_SEL_POINTS:         /* Sequence of points selected */
            ret_value=H5S_point_npoints(space);
            break;

        case H5S_SEL_HYPERSLABS:     /* Hyperslab selection defined */
            ret_value=H5S_hyper_npoints(space);
            break;

        case H5S_SEL_ALL:            /* Entire extent selected */
            ret_value=H5S_all_npoints(space);
            break;

        case H5S_SEL_NONE:           /* Nothing selected */
            ret_value=0;
            break;
    } /* end switch */

    FUNC_LEAVE (ret_value);
}   /* H5Sselect_npoints() */

/*--------------------------------------------------------------------------
 NAME
    H5S_sel_iter_release
 PURPOSE
    Release selection iterator information for a dataspace
 USAGE
    herr_t H5S_sel_iter_release(sel_iter)
        const H5S_t *space;             IN: Pointer to dataspace iterator is for
        H5S_sel_iter_t *sel_iter;       IN: Pointer to selection iterator
 RETURNS
    SUCCEED/FAIL
 DESCRIPTION
    Releases all information for a dataspace selection iterator
 GLOBAL VARIABLES
 COMMENTS, BUGS, ASSUMPTIONS
 EXAMPLES
 REVISION LOG
--------------------------------------------------------------------------*/
herr_t
H5S_sel_iter_release (const H5S_t *space, H5S_sel_iter_t *sel_iter)
{
    herr_t ret_value;     /* Return value */

    FUNC_ENTER (H5S_sel_iter_release, FAIL);

    /* Check args */
    assert (sel_iter);

    switch(space->select.type) {
        case H5S_SEL_POINTS:         /* Sequence of points selected */
        case H5S_SEL_ALL:            /* Entire extent selected */
            /* no action needed */
            ret_value=SUCCEED;
            break;

        case H5S_SEL_HYPERSLABS:     /* Hyperslab selection defined */
            ret_value=H5S_hyper_sel_iter_release(sel_iter);
            break;

        case H5S_SEL_NONE:           /* Nothing selected */
            break;
    } /* end switch() */

    FUNC_LEAVE (ret_value);
}   /* H5S_sel_iter_release() */