summaryrefslogtreecommitdiffstats
path: root/src/H5Oefl.c
blob: 246aa791aada2ef8e6eeb543870ea19a7960ef4d (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
/*
 * Copyright (C) 1997 NCSA
 *		      All rights reserved.
 *
 * Programmer: Robb Matzke <matzke@llnl.gov>
 *	       Tuesday, November 25, 1997
 */
#include <H5private.h>
#include <H5Eprivate.h>
#include <H5HLprivate.h>
#include <H5MMprivate.h>
#include <H5Oprivate.h>

#define PABLO_MASK	H5O_efl_mask

/* PRIVATE PROTOTYPES */
static void *H5O_efl_decode(H5F_t *f, const uint8 *p, H5O_shared_t *sh);
static herr_t H5O_efl_encode(H5F_t *f, uint8 *p, const void *_mesg);
static void *H5O_efl_copy(const void *_mesg, void *_dest);
static size_t H5O_efl_size(H5F_t *f, const void *_mesg);
static herr_t H5O_efl_reset(void *_mesg);
static herr_t H5O_efl_debug(H5F_t *f, const void *_mesg, FILE * stream,
			    intn indent, intn fwidth);

/* This message derives from H5O */
const H5O_class_t H5O_EFL[1] = {{
    H5O_EFL_ID,		    	/*message id number		*/
    "external file list",   	/*message name for debugging    */
    sizeof(H5O_efl_t),	    	/*native message size	    	*/
    H5O_efl_decode,	    	/*decode message		*/
    H5O_efl_encode,	    	/*encode message		*/
    H5O_efl_copy,	    	/*copy native value		*/
    H5O_efl_size,	    	/*size of message on disk	*/
    H5O_efl_reset,	    	/*reset method		    	*/
    NULL,	  	    	/*get share method		*/
    NULL,			/*set share method		*/
    H5O_efl_debug,	    	/*debug the message		*/
}};

/* Interface initialization */
static hbool_t interface_initialize_g = FALSE;
#define INTERFACE_INIT	NULL


/*-------------------------------------------------------------------------
 * Function:	H5O_efl_decode
 *
 * Purpose:	Decode an external file list message and return a pointer to
 *		the message (and some other data).
 *
 * Return:	Success:	Ptr to a new message struct.
 *
 *		Failure:	NULL
 *
 * Programmer:	Robb Matzke
 *		Tuesday, November 25, 1997
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static void *
H5O_efl_decode(H5F_t *f, const uint8 *p, H5O_shared_t __unused__ *sh)
{
    H5O_efl_t		*mesg = NULL;
    int			i;
    const char		*s = NULL;

    FUNC_ENTER(H5O_efl_decode, NULL);

    /* Check args */
    assert(f);
    assert(p);
    assert (!sh);

    /* Decode the header */
    mesg = H5MM_xcalloc(1, sizeof(H5O_efl_t));
    H5F_addr_decode(f, &p, &(mesg->heap_addr));
#ifndef NDEBUG
    assert (H5F_addr_defined (&(mesg->heap_addr)));
    s = H5HL_peek (f, &(mesg->heap_addr), 0);
    assert (s && !*s);
#endif
    UINT16DECODE(p, mesg->nalloc);
    assert(mesg->nalloc>0);
    UINT16DECODE(p, mesg->nused);
    assert(mesg->nused <= mesg->nalloc);
    p += 4; /*reserved*/

    /* Decode the file list */
    mesg->slot = H5MM_xcalloc(mesg->nalloc, sizeof(H5O_efl_entry_t));
    for (i=0; i<mesg->nused; i++) {
	/* Name */
	H5F_decode_length (f, p, mesg->slot[i].name_offset);
	s = H5HL_peek (f, &(mesg->heap_addr), mesg->slot[i].name_offset);
	assert (s && *s);
	mesg->slot[i].name = H5MM_xstrdup (s);
	
	/* File offset */
	H5F_decode_length (f, p, mesg->slot[i].offset);

	/* Size */
	H5F_decode_length (f, p, mesg->slot[i].size);
	assert (mesg->slot[i].size>0);
    }

    FUNC_LEAVE(mesg);
}

/*-------------------------------------------------------------------------
 * Function:	H5O_efl_encode
 *
 * Purpose:	Encodes a message.
 *
 * Return:	Success:	SUCCEED
 *
 *		Failure:	FAIL
 *
 * Programmer:	Robb Matzke
 *		Tuesday, November 25, 1997
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5O_efl_encode(H5F_t *f, uint8 *p, const void *_mesg)
{
    const H5O_efl_t	*mesg = (const H5O_efl_t *)_mesg;
    int			i;
    size_t		offset;
    

    FUNC_ENTER(H5O_efl_encode, FAIL);

    /* check args */
    assert(f);
    assert(mesg);
    assert(p);

    /* Encode header */
    assert (H5F_addr_defined (&(mesg->heap_addr)));
    H5F_addr_encode(f, &p, &(mesg->heap_addr));
    assert (mesg->nalloc>0);
    UINT16ENCODE(p, mesg->nused); /*yes, twice*/
    assert (mesg->nused>0 && mesg->nused<=mesg->nalloc);
    UINT16ENCODE(p, mesg->nused);
    *p++ = 0;
    *p++ = 0;
    *p++ = 0;
    *p++ = 0;

    /* Encode file list */
    for (i=0; i<mesg->nused; i++) {
	/*
	 * If the name has not been added to the heap yet then do so now.
	 */
	if (0==mesg->slot[i].name_offset) {
	    offset = H5HL_insert (f, &(mesg->heap_addr),
				  strlen (mesg->slot[i].name)+1,
				  mesg->slot[i].name);
	    if ((size_t)(-1)==offset) {
		HRETURN_ERROR (H5E_EFL, H5E_CANTINIT, FAIL,
			       "unable to insert URL into name heap");
	    }
	    mesg->slot[i].name_offset = offset;
	}

	/* Encode the file info */
	H5F_encode_length (f, p, mesg->slot[i].name_offset);
	H5F_encode_length (f, p, mesg->slot[i].offset);
	H5F_encode_length (f, p, mesg->slot[i].size);
    }

    FUNC_LEAVE(SUCCEED);
}


/*-------------------------------------------------------------------------
 * Function:	H5O_efl_copy
 *
 * Purpose:	Copies a message from _MESG to _DEST, allocating _DEST if
 *		necessary.
 *
 * Return:	Success:	Ptr to _DEST
 *
 *		Failure:	NULL
 *
 * Programmer:	Robb Matzke
 *		Tuesday, November 25, 1997
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static void *
H5O_efl_copy(const void *_mesg, void *_dest)
{
    const H5O_efl_t	*mesg = (const H5O_efl_t *) _mesg;
    H5O_efl_t		*dest = (H5O_efl_t *) _dest;
    int			i;

    FUNC_ENTER(H5O_efl_copy, NULL);

    /* check args */
    assert(mesg);
    if (!dest) {
	dest = H5MM_xcalloc(1, sizeof(H5O_efl_t));
	dest->slot = H5MM_xmalloc(mesg->nalloc * sizeof(H5O_efl_entry_t));
    } else if (NULL==dest->slot || dest->nalloc<mesg->nalloc) {
	H5MM_xfree(dest->slot);
	dest->slot = H5MM_xmalloc(mesg->nalloc * sizeof(H5O_efl_entry_t));
    }
    dest->heap_addr = mesg->heap_addr;
    dest->nalloc = mesg->nalloc;
    dest->nused = mesg->nused;

    for (i = 0; i < mesg->nused; i++) {
	dest->slot[i] = mesg->slot[i];
	dest->slot[i].name = H5MM_xstrdup (mesg->slot[i].name);
    }

    FUNC_LEAVE((void *)dest);
}


/*-------------------------------------------------------------------------
 * Function:	H5O_efl_size
 *
 * Purpose:	Returns the size of the raw message in bytes not counting the
 *		message type or size fields, but only the data fields.	This
 *		function doesn't take into account message alignment. This
 *		function doesn't count unused slots.
 *
 * Return:	Success:	Message data size in bytes.
 *
 *		Failure:	0
 *
 * Programmer:	Robb Matzke
 *		Tuesday, November 25, 1997
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static size_t
H5O_efl_size(H5F_t *f, const void *_mesg)
{
    const H5O_efl_t	*mesg = (const H5O_efl_t *) _mesg;
    size_t		ret_value = 0;

    FUNC_ENTER(H5O_efl_size, 0);

    /* check args */
    assert(f);
    assert(mesg);

    ret_value = H5F_SIZEOF_ADDR(f) +			/*heap address	*/
		2 +					/*slots allocated*/
		2 +					/*num slots used*/
		4 +					/*reserved	*/
		mesg->nused * (H5F_SIZEOF_SIZE(f) +	/*name offset	*/
			       H5F_SIZEOF_SIZE(f) +	/*file offset	*/
			       H5F_SIZEOF_SIZE(f));	/*file size	*/

    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5O_efl_reset
 *
 * Purpose:	Frees internal pointers and resets the message to an
 *		initialial state.
 *
 * Return:	Success:	SUCCEED
 *
 *		Failure:	FAIL
 *
 * Programmer:	Robb Matzke
 *		Tuesday, November 25, 1997
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5O_efl_reset(void *_mesg)
{
    H5O_efl_t	*mesg = (H5O_efl_t *) _mesg;
    int		i;
    

    FUNC_ENTER(H5O_efl_reset, FAIL);

    /* check args */
    assert(mesg);

    /* reset */
    for (i=0; i<mesg->nused; i++) {
	mesg->slot[i].name = H5MM_xfree (mesg->slot[i].name);
    }
    H5F_addr_undef (&(mesg->heap_addr));
    mesg->nused = mesg->nalloc = 0;
    mesg->slot = H5MM_xfree(mesg->slot);

    FUNC_LEAVE(SUCCEED);
}


/*-------------------------------------------------------------------------
 * Function:	H5O_efl_total_size
 *
 * Purpose:	Return the total size of the external file list by summing
 *		the sizes of all of the files.
 *
 * Return:	Success:	Total reserved size for external data.
 *
 *		Failure:	0
 *
 * Programmer:	Robb Matzke
 *              Tuesday, March  3, 1998
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
hsize_t
H5O_efl_total_size (H5O_efl_t *efl)
{
    int		i;
    hsize_t	ret_value = 0, tmp;
    
    FUNC_ENTER (H5O_efl_total_size, 0);

    if (efl->nused>0 &&
	H5O_EFL_UNLIMITED==efl->slot[efl->nused-1].size) {
	ret_value = H5O_EFL_UNLIMITED;
    } else {
	for (i=0; i<efl->nused; i++, ret_value=tmp) {
	    tmp = ret_value + efl->slot[i].size;
	    if (tmp<=ret_value) {
		HRETURN_ERROR (H5E_EFL, H5E_OVERFLOW, 0,
			       "total external storage size overflowed");
	    }
	}
    }

    FUNC_LEAVE (ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5O_efl_read
 *
 * Purpose:	Reads data from an external file list.  It is an error to
 *		read past the logical end of file, but reading past the end
 *		of any particular member of the external file list results in
 *		zeros.
 *
 * Return:	Success:	SUCCEED
 *
 *		Failure:	FAIL
 *
 * Programmer:	Robb Matzke
 *              Wednesday, March  4, 1998
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5O_efl_read (H5F_t __unused__ *f, const H5O_efl_t *efl, haddr_t *addr,
	      hsize_t size, uint8 *buf)
{
    int		i, fd=-1;
    size_t	to_read, cur, skip=0;
    ssize_t	n;
    herr_t	ret_value = FAIL;
    
    FUNC_ENTER (H5O_efl_read, FAIL);

    /* Check args */
    assert (efl && efl->nused>0);
    assert (addr && H5F_addr_defined (addr));
    assert (size < MAX_SIZET);
    assert (buf || 0==size);

    /* Find the first efl member from which to read */
    for (i=0, cur=0; i<efl->nused; i++) {
	if (H5O_EFL_UNLIMITED==efl->slot[i].size ||
	    addr->offset < cur+efl->slot[i].size) {
	    skip = addr->offset - cur;
	    break;
	}
	cur += efl->slot[i].size;
    }
    
    /* Read the data */
    while (size) {
	if (i>=efl->nused) {
	    HGOTO_ERROR (H5E_EFL, H5E_OVERFLOW, FAIL,
			 "read past logical end of file");
	}
	if (H5F_OVERFLOW_SIZET2OFFT (efl->slot[i].offset+skip)) {
	    HGOTO_ERROR (H5E_EFL, H5E_OVERFLOW, FAIL,
			 "external file address overflowed");
	}
	if ((fd=open (efl->slot[i].name, O_RDONLY))<0) {
	    HGOTO_ERROR (H5E_EFL, H5E_CANTOPENFILE, FAIL,
			 "unable to open external raw data file");
	}
	if (lseek (fd, (off_t)(efl->slot[i].offset+skip), SEEK_SET)<0) {
	    HGOTO_ERROR (H5E_EFL, H5E_SEEKERROR, FAIL,
			 "unable to seek in external raw data file");
	}
	to_read = MIN(efl->slot[i].size-skip, size);
	if ((n=read (fd, buf, to_read))<0) {
	    HGOTO_ERROR (H5E_EFL, H5E_READERROR, FAIL,
			 "read error in external raw data file");
	} else if ((size_t)n<to_read) {
	    HDmemset (buf+n, 0, to_read-n);
	}
	close (fd);
	fd = -1;
	size -= to_read;
	buf += to_read;
	skip = 0;
	i++;
    }
    ret_value = SUCCEED;
    
 done:
    if (fd>=0) close (fd);
    FUNC_LEAVE (ret_value);
}
	

/*-------------------------------------------------------------------------
 * Function:	H5O_efl_write
 *
 * Purpose:	Writes data to an external file list.  It is an error to
 *		write past the logical end of file, but writing past the end
 *		of any particular member of the external file list just
 *		extends that file.
 *
 * Return:	Success:	SUCCEED
 *
 *		Failure:	FAIL
 *
 * Programmer:	Robb Matzke
 *              Wednesday, March  4, 1998
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5O_efl_write (H5F_t __unused__ *f, const H5O_efl_t *efl, haddr_t *addr,
	       hsize_t size, const uint8 *buf)
{
    int		i, fd=-1;
    size_t	to_write, cur, skip=0;
    herr_t	ret_value = FAIL;
    
    FUNC_ENTER (H5O_efl_write, FAIL);

    /* Check args */
    assert (efl && efl->nused>0);
    assert (addr && H5F_addr_defined (addr));
    assert (size < MAX_SIZET);
    assert (buf || 0==size);

    /* Find the first efl member in which to write */
    for (i=0, cur=0; i<efl->nused; i++) {
	if (H5O_EFL_UNLIMITED==efl->slot[i].size ||
	    addr->offset < cur+efl->slot[i].size) {
	    skip = addr->offset - cur;
	    break;
	}
	cur += efl->slot[i].size;
    }
    
    /* Write the data */
    while (size) {
	if (i>=efl->nused) {
	    HGOTO_ERROR (H5E_EFL, H5E_OVERFLOW, FAIL,
			 "write past logical end of file");
	}
	if (H5F_OVERFLOW_SIZET2OFFT (efl->slot[i].offset+skip)) {
	    HGOTO_ERROR (H5E_EFL, H5E_OVERFLOW, FAIL,
			 "external file address overflowed");
	}
	if ((fd=open (efl->slot[i].name, O_RDWR))<0) {
	    if (access (efl->slot[i].name, F_OK)<0) {
		HGOTO_ERROR (H5E_EFL, H5E_CANTOPENFILE, FAIL,
			     "external raw data file does not exist");
	    } else {
		HGOTO_ERROR (H5E_EFL, H5E_CANTOPENFILE, FAIL,
			     "unable to open external raw data file");
	    }
	}
	if (lseek (fd, (off_t)(efl->slot[i].offset+skip), SEEK_SET)<0) {
	    HGOTO_ERROR (H5E_EFL, H5E_SEEKERROR, FAIL,
			 "unable to seek in external raw data file");
	}
	to_write = MIN(efl->slot[i].size-skip, size);
	if ((size_t)write (fd, buf, to_write)!=to_write) {
	    HGOTO_ERROR (H5E_EFL, H5E_READERROR, FAIL,
			 "write error in external raw data file");
	} 
	close (fd);
	fd = -1;
	size -= to_write;
	buf += to_write;
	skip = 0;
	i++;
    }
    ret_value = SUCCEED;
    
 done:
    if (fd>=0) close (fd);
    FUNC_LEAVE (ret_value);
}
	

/*-------------------------------------------------------------------------
 * Function:	H5O_efl_debug
 *
 * Purpose:	Prints debugging info for a message.
 *
 * Return:	Success:	SUCCEED
 *
 *		Failure:	FAIL
 *
 * Programmer:	Robb Matzke
 *		Tuesday, November 25, 1997
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5O_efl_debug(H5F_t __unused__ *f, const void *_mesg, FILE * stream,
	      intn indent, intn fwidth)
{
    const H5O_efl_t	   *mesg = (const H5O_efl_t *) _mesg;
    char		    buf[64];
    intn		    i;

    FUNC_ENTER(H5O_efl_debug, FAIL);

    /* check args */
    assert(f);
    assert(mesg);
    assert(stream);
    assert(indent >= 0);
    assert(fwidth >= 0);

    fprintf(stream, "%*s%-*s ", indent, "", fwidth,
	    "Heap address:");
    H5F_addr_print(stream, &(mesg->heap_addr));
    fprintf(stream, "\n");

    fprintf(stream, "%*s%-*s %u/%u\n", indent, "", fwidth,
	    "Slots used/allocated:",
	    mesg->nused, mesg->nalloc);

    for (i = 0; i < mesg->nused; i++) {
	sprintf (buf, "File %d", i);
	fprintf (stream, "%*s%s:\n", indent, "", buf);
	
	fprintf(stream, "%*s%-*s \"%s\"\n", indent+3, "", MAX (fwidth-3, 0),
		"Name:",
		mesg->slot[i].name);
	
	fprintf(stream, "%*s%-*s %lu\n", indent+3, "", MAX (fwidth-3, 0),
		"Name offset:",
		(unsigned long)(mesg->slot[i].name_offset));

	fprintf (stream, "%*s%-*s %lu\n", indent+3, "", MAX (fwidth-3, 0),
		 "Offset of data in file:",
		 (unsigned long)(mesg->slot[i].offset));

	fprintf (stream, "%*s%-*s %lu\n", indent+3, "", MAX (fwidth-3, 0),
		 "Bytes reserved for data:",
		 (unsigned long)(mesg->slot[i].size));
    }

    FUNC_LEAVE(SUCCEED);
}