summaryrefslogtreecommitdiffstats
path: root/src/H5Spoint.c
blob: a291d8a8be387d21c2eaa84ba56609ee60d3e262 (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
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
/*
 * Copyright (C) 1998 NCSA
 *                    All rights reserved.
 *
 * Programmer:  Quincey Koziol <koziol@ncsa.uiuc.edu>
 *              Tuesday, June 16, 1998
 *
 * Purpose:	Point selection data space I/O functions.
 */
#include <H5private.h>
#include <H5Eprivate.h>
#include <H5MMprivate.h>
#include <H5Sprivate.h>
#include <H5Vprivate.h>

/* Interface initialization */
#define PABLO_MASK      H5S_point_mask
#define INTERFACE_INIT  NULL
static intn             interface_initialize_g = FALSE;

/*-------------------------------------------------------------------------
 * Function:	H5S_point_init
 *
 * Purpose:	Initializes iteration information for point selection.
 *
 * Return:	non-negative on success, negative on failure.
 *
 * Programmer:	Quincey Koziol
 *              Tuesday, June 16, 1998
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5S_point_init (const struct H5O_layout_t __unused__ *layout,
		const H5S_t *space, H5S_sel_iter_t *sel_iter)
{
    FUNC_ENTER (H5S_point_init, FAIL);

    /* Check args */
    assert (layout);
    assert (space && H5S_SEL_POINTS==space->select.type);
    assert (sel_iter);

#ifdef QAK
    printf("%s: check 1.0\n",FUNC);
#endif /* QAK */
    /* Initialize the number of points to iterate over */
    sel_iter->pnt.elmt_left=space->select.num_elem;

    /* Start at the head of the list of points */
    sel_iter->pnt.curr=space->select.sel_info.pnt_lst->head;
    
    FUNC_LEAVE (SUCCEED);
}

/*--------------------------------------------------------------------------
 NAME
    H5S_point_add
 PURPOSE
    Add a series of elements to a point selection
 USAGE
    herr_t H5S_point_add(space, num_elem, coord)
        H5S_t *space;           IN: Dataspace of selection to modify
        size_t num_elem;        IN: Number of elements in COORD array.
        const hssize_t *coord[];    IN: The location of each element selected
 RETURNS
    SUCCEED/FAIL
 DESCRIPTION
    This function adds elements to the current point selection for a dataspace
 GLOBAL VARIABLES
 COMMENTS, BUGS, ASSUMPTIONS
 EXAMPLES
 REVISION LOG
--------------------------------------------------------------------------*/
herr_t H5S_point_add (H5S_t *space, size_t num_elem, const hssize_t **_coord)
{
    H5S_pnt_node_t *top, *curr, *new; /* Point selection nodes */
    const hssize_t *coord=(const hssize_t *)_coord;     /* Pointer to the actual coordinates */
    uintn i;                 /* Counter */
    herr_t ret_value=FAIL;  /* return value */

    FUNC_ENTER (H5S_point_add, FAIL);

    assert(space);
    assert(num_elem>0);
    assert(coord);

#ifdef QAK
    printf("%s: check 1.0\n",FUNC);
#endif /* QAK */
    top=curr=NULL;
    for(i=0; i<num_elem; i++) {
        /* Allocate space for the new node */
        if((new = H5MM_malloc(sizeof(H5S_pnt_node_t)))==NULL)
            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL,
                "can't allocate point node");

#ifdef QAK
	printf("%s: check 1.1, rank=%d\n",
	       FUNC,(int)space->extent.u.simple.rank);
#endif /* QAK */
        if((new->pnt = H5MM_malloc(space->extent.u.simple.rank*sizeof(hssize_t)))==NULL)
            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL,
                "can't allocate coordinate information");
#ifdef QAK
	printf("%s: check 1.2\n",FUNC);
#endif /* QAK */

        /* Copy over the coordinates */
        HDmemcpy(new->pnt,coord+(i*space->extent.u.simple.rank),(space->extent.u.simple.rank*sizeof(hssize_t)));
#ifdef QAK
	printf("%s: check 1.3\n",FUNC);
	{
	    intn j;

	    for(j=0; j<space->extent.u.simple.rank; j++) {
		printf("%s: pnt[%d]=%d\n",FUNC,(int)j,(int)new->pnt[j]);
		printf("%s: coord[%d][%d]=%d\n",
		       FUNC, (int)i, (int)j,
		       (int)*(coord+(i*space->extent.u.simple.rank)+j));
	    }
	}
#endif /* QAK */

        /* Link into list */
        new->next=NULL;
        if(top==NULL)
            top=new;
        else
            curr->next=new;
        curr=new;
    } /* end for */
#ifdef QAK
    printf("%s: check 2.0\n",FUNC);
#endif /* QAK */

    /* Append current list, if there is one */
    if(space->select.sel_info.pnt_lst->head!=NULL)
        curr->next=space->select.sel_info.pnt_lst->head;

    /* Put new list in point selection */
    space->select.sel_info.pnt_lst->head=top;

    /* Add the number of elements in the new selection */
    space->select.num_elem+=num_elem;

    ret_value=SUCCEED;
#ifdef QAK
    printf("%s: check 3.0\n",FUNC);
#endif /* QAK */
    
done:
    FUNC_LEAVE (ret_value);
}   /* H5S_point_add() */

/*-------------------------------------------------------------------------
 * Function:	H5S_point_favail
 *
 * Purpose:	Figure out the optimal number of elements to transfer to/from the file
 *
 * Return:	non-negative number of elements on success, negative on failure
 *
 * Programmer:	Quincey Koziol
 *              Tuesday, June 16, 1998
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
size_t
H5S_point_favail (const H5S_t __unused__ *space, const H5S_sel_iter_t *sel_iter, size_t max)
{
    FUNC_ENTER (H5S_point_favail, FAIL);

    /* Check args */
    assert (space && H5S_SEL_POINTS==space->select.type);
    assert (sel_iter);

#ifdef QAK
    printf("%s: check 1.0, ret=%d\n",
	   FUNC,(int)MIN(sel_iter->pnt.elmt_left,max));
#endif /* QAK */
    FUNC_LEAVE (MIN(sel_iter->pnt.elmt_left,max));
}   /* H5S_point_favail() */

/*-------------------------------------------------------------------------
 * Function:	H5S_point_fgath
 *
 * Purpose:	Gathers data points from file F and accumulates them in the
 *		type conversion buffer BUF.  The LAYOUT argument describes
 *		how the data is stored on disk and EFL describes how the data
 *		is organized in external files.  ELMT_SIZE is the size in
 *		bytes of a datum which this function treats as opaque.
 *		FILE_SPACE describes the data space of the dataset on disk
 *		and the elements that have been selected for reading (via
 *		hyperslab, etc).  This function will copy at most NELMTS
 *		elements.
 *
 *  Notes: This could be optimized by gathering selected elements near (how
 *      near?) each other into one I/O request and then moving the correct
 *      elements into the return buffer
 *
 * Return:	Success:	Number of elements copied.
 *
 *		Failure:	0
 *
 * Programmer:	Quincey Koziol
 *              Tuesday, June 16, 1998
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
size_t
H5S_point_fgath (H5F_t *f, const struct H5O_layout_t *layout,
		 const struct H5O_compress_t *comp,
		 const struct H5O_efl_t *efl, size_t elmt_size,
		 const H5S_t *file_space, H5S_sel_iter_t *file_iter,
		 size_t nelmts, const H5D_transfer_t xfer_mode,
		 void *_buf/*out*/)
{
    hssize_t	file_offset[H5O_LAYOUT_NDIMS];	/*offset of slab in file*/
    hsize_t	hsize[H5O_LAYOUT_NDIMS];	/*size of hyperslab	*/
    hssize_t	zero[H5O_LAYOUT_NDIMS];		/*zero			*/
    uint8 *buf=(uint8 *)_buf;   /* Alias for pointer arithmetic */
    uintn   ndims;          /* Number of dimensions of dataset */
    intn	i;				/*counters		*/
    size_t  num_read;       /* number of elements read into buffer */

    FUNC_ENTER (H5S_point_fgath, 0);

    /* Check args */
    assert (f);
    assert (layout);
    assert (elmt_size>0);
    assert (file_space);
    assert (file_iter);
    assert (nelmts>0);
    assert (buf);

#ifdef QAK
    printf("%s: check 1.0\n",FUNC);
#endif /* QAK */
    ndims=file_space->extent.u.simple.rank;
    /* initialize hyperslab size and offset in memory buffer */
    for(i=0; i<(int)(ndims+1); i++) {
        hsize[i]=1;     /* hyperslab size is 1, except for last element */
        zero[i]=0;      /* memory offset is 0 */
    } /* end for */
    hsize[ndims] = elmt_size;

    /*
     * Walk though and request each element we need and put it into the
     * buffer.
     */
    num_read=0;
    while(num_read<nelmts) {
        if(file_iter->pnt.elmt_left>0) {
            /* Copy the location of the point to get */
            HDmemcpy(file_offset, file_iter->pnt.curr->pnt,
		     ndims*sizeof(hssize_t));
            file_offset[ndims] = 0;

            /* Go read the point */
            if (H5F_arr_read (f, layout, comp, efl, hsize, hsize, zero,
			      file_offset, xfer_mode, buf/*out*/)<0) {
                HRETURN_ERROR (H5E_DATASPACE, H5E_READERROR, 0, "read error");
            }

#ifdef QAK
	    printf("%s: check 3.0\n",FUNC);
	    {
		for(i=0; i<ndims; i++) {
		    printf("%s: %d - pnt=%d\n",
			   FUNC, (int)i, (int)file_iter->pnt.curr->pnt[i]);
		    printf("%s: %d - file_offset=%d\n",
			   FUNC, (int)i, (int)file_offset[i]);
		}
		printf("%s: *buf=%u\n",FUNC,(unsigned)*buf);
	    }
#endif /* QAK */
            /* Increment the offset of the buffer */
            buf+=elmt_size;

            /* Increment the count read */
            num_read++;

            /* Advance the point iterator */
            file_iter->pnt.elmt_left--;
            file_iter->pnt.curr=file_iter->pnt.curr->next;
        } else {
            break;      /* out of elements in the selection */
        } /* end else */
    } /* end while */
    
    FUNC_LEAVE (num_read);
} /* H5S_point_fgath() */

/*-------------------------------------------------------------------------
 * Function:	H5S_point_fscat
 *
 * Purpose:	Scatters dataset elements from the type conversion buffer BUF
 *		to the file F where the data points are arranged according to
 *		the file data space FILE_SPACE and stored according to
 *		LAYOUT and EFL. Each element is ELMT_SIZE bytes.
 *		The caller is requesting that NELMTS elements are copied.
 *
 * Return:	Success:	SUCCEED
 *
 *		Failure:	FAIL
 *
 * Programmer:	Quincey Koziol
 *              Tuesday, June 16, 1998
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5S_point_fscat (H5F_t *f, const struct H5O_layout_t *layout,
		 const struct H5O_compress_t *comp,
		 const struct H5O_efl_t *efl, size_t elmt_size,
		 const H5S_t *file_space, H5S_sel_iter_t *file_iter,
		 size_t nelmts, const H5D_transfer_t xfer_mode,
		 const void *_buf)
{
    hssize_t	file_offset[H5O_LAYOUT_NDIMS];	/*offset of hyperslab	*/
    hsize_t	hsize[H5O_LAYOUT_NDIMS];	/*size of hyperslab	*/
    hssize_t	zero[H5O_LAYOUT_NDIMS];		/*zero vector		*/
    const uint8 *buf=(const uint8 *)_buf;   /* Alias for pointer arithmetic */
    uintn   ndims;          /* Number of dimensions of dataset */
    intn	i;				/*counters		*/
    size_t  num_written;    /* number of elements written from buffer */

    FUNC_ENTER (H5S_point_fscat, FAIL);

    /* Check args */
    assert (f);
    assert (layout);
    assert (elmt_size>0);
    assert (file_space);
    assert (file_iter);
    assert (nelmts>0);
    assert (buf);

#ifdef QAK
    printf("%s: check 1.0, layout->ndims=%d\n",FUNC,(int)layout->ndims);
#endif /* QAK */
    ndims=file_space->extent.u.simple.rank;
    /* initialize hyperslab size and offset in memory buffer */
    for(i=0; i<(int)(ndims+1); i++) {
        hsize[i]=1;     /* hyperslab size is 1, except for last element */
        zero[i]=0;      /* memory offset is 0 */
    } /* end for */
    hsize[ndims] = elmt_size;

    /*
     * Walk though and request each element we need and put it into the
     * buffer.
     */
    num_written=0;
    while(num_written<nelmts && file_iter->pnt.elmt_left>0) {
#ifdef QAK
	printf("%s: check 2.0\n",FUNC);
	{
	    for(i=0; i<ndims; i++) {
		printf("%s: %d - pnt=%d\n",
		       FUNC, (int)i, (int)file_iter->pnt.curr->pnt[i]);
	    }
	}
#endif /* QAK */
        /* Copy the location of the point to get */
        HDmemcpy(file_offset,file_iter->pnt.curr->pnt,ndims*sizeof(hssize_t));
        file_offset[ndims] = 0;

#ifdef QAK
	printf("%s: check 3.0\n",FUNC);
	{
	    for(i=0; i<ndims; i++) {
		printf("%s: %d - pnt=%d\n",
		       FUNC,(int)i,(int)file_iter->pnt.curr->pnt[i]);
		printf("%s: %d - file_offset=%d\n",
		       FUNC,(int)i,(int)file_offset[i]);
	    }
	    printf("%s: *buf=%u\n",FUNC,(unsigned)*buf);
	}
#endif /* QAK */
        /* Go write the point */
        if (H5F_arr_write (f, layout, comp, efl, hsize, hsize, zero,
			   file_offset, xfer_mode, buf)<0) {
            HRETURN_ERROR (H5E_DATASPACE, H5E_WRITEERROR, 0, "write error");
        }

        /* Increment the offset of the buffer */
        buf+=elmt_size;

        /* Increment the count read */
        num_written++;

        /* Advance the point iterator */
        file_iter->pnt.elmt_left--;
        file_iter->pnt.curr=file_iter->pnt.curr->next;
#ifdef QAK
	printf("%s: check 5.0, file_iter->pnt.curr=%p\n",
	       FUNC,file_iter->pnt.curr);
#endif
    } /* end while */

    FUNC_LEAVE (num_written);
}   /* H5S_point_fscat() */

/*-------------------------------------------------------------------------
 * Function:	H5S_point_mgath
 *
 * Purpose:	Gathers dataset elements from application memory BUF and
 *		copies them into the data type conversion buffer TCONV_BUF.
 *		Each element is ELMT_SIZE bytes and arranged in application
 *		memory according to MEM_SPACE.  
 *		The caller is requesting that at most NELMTS be gathered.
 *
 * Return:	Success:	Number of elements copied.
 *
 *		Failure:	0
 *
 * Programmer:	Quincey Koziol
 *              Tuesday, June 16, 1998
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
size_t
H5S_point_mgath (const void *_buf, size_t elmt_size,
		 const H5S_t *mem_space, H5S_sel_iter_t *mem_iter,
		 size_t nelmts, void *_tconv_buf/*out*/)
{
    hsize_t	mem_size[H5O_LAYOUT_NDIMS];	/*total size of app buf	*/
    const uint8 *buf=(const uint8 *)_buf;   /* Get local copies for address arithmetic */
    uint8 *tconv_buf=(uint8 *)_tconv_buf;
    hsize_t	acc;				/* coordinate accumulator */
    hsize_t	off;				/* coordinate offset */
    intn	space_ndims;			/*dimensionality of space*/
    intn	i;				/*counters		*/
    size_t num_gath;        /* number of elements gathered */

    FUNC_ENTER (H5S_point_mgath, 0);

    /* Check args */
    assert (buf);
    assert (elmt_size>0);
    assert (mem_space && H5S_SEL_POINTS==mem_space->select.type);
    assert (nelmts>0);
    assert (tconv_buf);

#ifdef QAK
    printf("%s: check 1.0\n",FUNC);
#endif /* QAK */
    if ((space_ndims=H5S_extent_dims (mem_space, mem_size, NULL))<0) {
        HRETURN_ERROR (H5E_DATASPACE, H5E_CANTINIT, 0,
		       "unable to retrieve data space dimensions");
    }

    for(num_gath=0; num_gath<nelmts; num_gath++) {
        if(mem_iter->pnt.elmt_left>0) {
            /* Compute the location of the point to get */
            for(i=space_ndims-1,acc=1,off=0; i>=0; i--) {
                off+=mem_iter->pnt.curr->pnt[i]*acc;
                acc*=mem_size[i];
            } /* end for */

#ifdef QAK
	    printf("%s: check 2.0, acc=%d, off=%d\n",FUNC,(int)acc,(int)off);
#endif /* QAK */
            /* Copy the elements into the type conversion buffer */
            HDmemcpy(tconv_buf,buf+off,elmt_size);

            /* Increment the offset of the buffers */
            tconv_buf+=elmt_size;

            /* Advance the point iterator */
            mem_iter->pnt.elmt_left--;
            mem_iter->pnt.curr=mem_iter->pnt.curr->next;
        } else {
            break;      /* out of elements in the selection */
        } /* end else */
    } /* end for */

    FUNC_LEAVE (num_gath);
}   /* H5S_point_mgath() */

/*-------------------------------------------------------------------------
 * Function:	H5S_point_mscat
 *
 * Purpose:	Scatters NELMTS data points from the type conversion buffer
 *		TCONV_BUF to the application buffer BUF.  Each element is
 *		ELMT_SIZE bytes and they are organized in application memory
 *		according to MEM_SPACE.
 *
 * Return:	Success:	SUCCEED
 *
 *		Failure:	FAIL
 *
 * Programmer:	Quincey Koziol
 *              Wednesday, June 17, 1998
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5S_point_mscat (const void *_tconv_buf, size_t elmt_size,
		 const H5S_t *mem_space, H5S_sel_iter_t *mem_iter,
		 size_t nelmts, void *_buf/*out*/)
{
    hsize_t	mem_size[H5O_LAYOUT_NDIMS];	/*total size of app buf	*/
    uint8 *buf=(uint8 *)_buf;   /* Get local copies for address arithmetic */
    const uint8 *tconv_buf=(const uint8 *)_tconv_buf;
    hsize_t	acc;				/* coordinate accumulator */
    hsize_t	off;				/* coordinate offset */
    intn	space_ndims;		/*dimensionality of space*/
    intn	i;				/*counters		*/
    size_t num_scat;        /* Number of elements scattered */

    FUNC_ENTER (H5S_point_mscat, FAIL);

    /* Check args */
    assert (tconv_buf);
    assert (elmt_size>0);
    assert (mem_space && H5S_SEL_POINTS==mem_space->select.type);
    assert (nelmts>0);
    assert (buf);

#ifdef QAK
    printf("%s: check 1.0\n",FUNC);
#endif /* QAK */
    /*
     * Retrieve hyperslab information to determine what elements are being
     * selected (there might be other selection methods in the future).  We
     * only handle hyperslabs with unit sample because there's currently no
     * way to pass sample information to H5V_hyper_copy().
     */
    if ((space_ndims=H5S_extent_dims (mem_space, mem_size, NULL))<0) {
        HRETURN_ERROR (H5E_DATASPACE, H5E_CANTINIT, FAIL,
		       "unable to retrieve data space dimensions");
    }

    for(num_scat=0; num_scat<nelmts; num_scat++) {
        if(mem_iter->pnt.elmt_left>0) {
            /* Compute the location of the point to get */
            for(i=space_ndims-1,acc=1,off=0; i>=0; i--) {
                off+=mem_iter->pnt.curr->pnt[i]*acc;
                acc*=mem_size[i];
            } /* end for */

            /* Copy the elements into the type conversion buffer */
            HDmemcpy(buf+off,tconv_buf,elmt_size);

            /* Increment the offset of the buffers */
            tconv_buf+=elmt_size;

            /* Advance the point iterator */
            mem_iter->pnt.elmt_left--;
            mem_iter->pnt.curr=mem_iter->pnt.curr->next;
        } else {
            break;      /* out of elements in the selection */
        } /* end else */
    } /* end for */

    FUNC_LEAVE (SUCCEED);
}   /* H5S_point_mscat() */

/*--------------------------------------------------------------------------
 NAME
    H5S_point_release
 PURPOSE
    Release point selection information for a dataspace
 USAGE
    herr_t H5S_point_release(space)
        H5S_t *space;       IN: Pointer to dataspace
 RETURNS
    SUCCEED/FAIL
 DESCRIPTION
    Releases all point selection information for a dataspace
 GLOBAL VARIABLES
 COMMENTS, BUGS, ASSUMPTIONS
 EXAMPLES
 REVISION LOG
--------------------------------------------------------------------------*/
herr_t
H5S_point_release (H5S_t *space)
{
    H5S_pnt_node_t *curr, *next;        /* Point selection nodes */
    FUNC_ENTER (H5S_point_release, FAIL);

    /* Check args */
    assert (space);

    /* Delete all the nodes from the list */
    curr=space->select.sel_info.pnt_lst->head;
    while(curr!=NULL) {
        next=curr->next;
        H5MM_xfree(curr->pnt);
        H5MM_xfree(curr);
        curr=next;
    } /* end while */
    
    /* Reset the number of elements in the selection */
    space->select.num_elem=0;
    
    FUNC_LEAVE (SUCCEED);
}   /* H5S_point_release() */

/*--------------------------------------------------------------------------
 NAME
    H5S_point_npoints
 PURPOSE
    Compute number of elements in current selection
 USAGE
    hsize_t H5S_point_npoints(space)
        H5S_t *space;       IN: Pointer to dataspace
 RETURNS
    The number of elements in selection on success, 0 on failure
 DESCRIPTION
    Compute number of elements in current selection.
 GLOBAL VARIABLES
 COMMENTS, BUGS, ASSUMPTIONS
 EXAMPLES
 REVISION LOG
--------------------------------------------------------------------------*/
hsize_t
H5S_hyper_npoints (const H5S_t *space)
{
    FUNC_ENTER (H5S_hyper_npoints, 0);

    /* Check args */
    assert (space);

    FUNC_LEAVE (space->select.num_elem);
}   /* H5S_hyper_npoints() */