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
|
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* Copyright by the Board of Trustees of the University of Illinois. *
* 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 files COPYING and Copyright.html. COPYING can be found at the root *
* of the source code distribution tree; Copyright.html can be found at the *
* root level of an installed copy of the electronic HDF5 document set and *
* is linked from the top-level documents page. It can also be found at *
* http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*-------------------------------------------------------------------------
*
* Created: H5FDint.c
* Jan 17 2008
* Quincey Koziol <koziol@hdfgroup.org>
*
* Purpose: Internal routine for VFD operations
*
*-------------------------------------------------------------------------
*/
/****************/
/* Module Setup */
/****************/
#define H5FD_PACKAGE /*suppress error about including H5FDpkg */
/* Interface initialization */
#define H5_INTERFACE_INIT_FUNC H5FD_int_init_interface
/***********/
/* Headers */
/***********/
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5Fprivate.h" /* File access */
#include "H5FDpkg.h" /* File Drivers */
#include "H5Iprivate.h" /* IDs */
/****************/
/* Local Macros */
/****************/
/******************/
/* Local Typedefs */
/******************/
/********************/
/* Package Typedefs */
/********************/
/********************/
/* Local Prototypes */
/********************/
/*********************/
/* Package Variables */
/*********************/
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
/*--------------------------------------------------------------------------
NAME
H5FD_int_init_interface -- Initialize interface-specific information
USAGE
herr_t H5FD_int_init_interface()
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
Initializes any interface-specific data or routines. (Just calls
H5FD_init_iterface currently).
--------------------------------------------------------------------------*/
static herr_t
H5FD_int_init_interface(void)
{
FUNC_ENTER_NOAPI_NOINIT_NOERR
FUNC_LEAVE_NOAPI(H5FD_init())
} /* H5FD_int_init_interface() */
/*-------------------------------------------------------------------------
* Function: H5FD_locate_signature
*
* Purpose: Finds the HDF5 superblock signature in a file. The
* signature can appear at address 0, or any power of two
* beginning with 512.
*
* Return: Success: SUCCEED
* Failure: FAIL
*
* Programmer: Robb Matzke
* Friday, November 7, 1997
*
*-------------------------------------------------------------------------
*/
herr_t
H5FD_locate_signature(H5FD_t *file, const H5P_genplist_t *dxpl, haddr_t *sig_addr)
{
haddr_t addr, eoa, eof;
uint8_t buf[H5F_SIGNATURE_LEN];
unsigned n, maxpow;
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT
/* Find the least N such that 2^N is larger than the file size */
eof = H5FD_get_eof(file, H5FD_MEM_SUPER);
eoa = H5FD_get_eoa(file, H5FD_MEM_SUPER);
addr = MAX(eof, eoa);
if(HADDR_UNDEF == addr)
HGOTO_ERROR(H5E_IO, H5E_CANTINIT, FAIL, "unable to obtain EOF/EOA value")
for(maxpow = 0; addr; maxpow++)
addr >>= 1;
maxpow = MAX(maxpow, 9);
/*
* Search for the file signature at format address zero followed by
* powers of two larger than 9.
*/
for(n = 8; n < maxpow; n++) {
addr = (8 == n) ? 0 : (haddr_t)1 << n;
if(H5FD_set_eoa(file, H5FD_MEM_SUPER, addr + H5F_SIGNATURE_LEN) < 0)
HGOTO_ERROR(H5E_IO, H5E_CANTINIT, FAIL, "unable to set EOA value for file signature")
if(H5FD_read(file, dxpl, H5FD_MEM_SUPER, addr, (size_t)H5F_SIGNATURE_LEN, buf) < 0)
HGOTO_ERROR(H5E_IO, H5E_CANTINIT, FAIL, "unable to read file signature")
if(!HDmemcmp(buf, H5F_SIGNATURE, (size_t)H5F_SIGNATURE_LEN))
break;
} /* end for */
/*
* If the signature was not found then reset the EOA value and return
* HADDR_UNDEF.
*/
if(n >= maxpow) {
if(H5FD_set_eoa(file, H5FD_MEM_SUPER, eoa) < 0)
HGOTO_ERROR(H5E_IO, H5E_CANTINIT, FAIL, "unable to reset EOA value")
*sig_addr = HADDR_UNDEF;
} /* end if */
else
/* Set return value */
*sig_addr = addr;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_locate_signature() */
/*-------------------------------------------------------------------------
* Function: H5FD_read
*
* Purpose: Private version of H5FDread()
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Robb Matzke
* Wednesday, August 4, 1999
*
*-------------------------------------------------------------------------
*/
herr_t
H5FD_read(H5FD_t *file, const H5P_genplist_t *dxpl, H5FD_mem_t type, haddr_t addr,
size_t size, void *buf/*out*/)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
HDassert(file && file->cls);
HDassert(TRUE == H5P_class_isa(H5P_CLASS(dxpl), H5P_CLS_DATASET_XFER_g));
HDassert(buf);
#ifndef H5_HAVE_PARALLEL
/* Do not return early for Parallel mode since the I/O could be a */
/* collective transfer. */
/* The no-op case */
if(0 == size)
HGOTO_DONE(SUCCEED)
#endif /* H5_HAVE_PARALLEL */
/* Dispatch to driver */
if((file->cls->read)(file, type, H5P_PLIST_ID(dxpl), addr + file->base_addr, size, buf) < 0)
HGOTO_ERROR(H5E_VFL, H5E_READERROR, FAIL, "driver read request failed")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_read() */
/*-------------------------------------------------------------------------
* Function: H5FD_write
*
* Purpose: Private version of H5FDwrite()
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Robb Matzke
* Wednesday, August 4, 1999
*
*-------------------------------------------------------------------------
*/
herr_t
H5FD_write(H5FD_t *file, const H5P_genplist_t *dxpl, H5FD_mem_t type, haddr_t addr,
size_t size, const void *buf)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
HDassert(file && file->cls);
HDassert(TRUE == H5P_class_isa(H5P_CLASS(dxpl), H5P_CLS_DATASET_XFER_g));
HDassert(buf);
#ifndef H5_HAVE_PARALLEL
/* Do not return early for Parallel mode since the I/O could be a */
/* collective transfer. */
/* The no-op case */
if(0 == size)
HGOTO_DONE(SUCCEED)
#endif /* H5_HAVE_PARALLEL */
/* Dispatch to driver */
if((file->cls->write)(file, type, H5P_PLIST_ID(dxpl), addr + file->base_addr, size, buf) < 0)
HGOTO_ERROR(H5E_VFL, H5E_WRITEERROR, FAIL, "driver write request failed")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_write() */
/*-------------------------------------------------------------------------
* Function: H5FD_set_eoa
*
* Purpose: Private version of H5FDset_eoa()
*
* This function expects the EOA is a RELATIVE address, i.e.
* relative to the base address. This is NOT the same as the
* EOA stored in the superblock, which is an absolute
* address. Object addresses are relative.
*
* Return: Success: Non-negative
* Failure: Negative, no side effect
*
* Programmer: Robb Matzke
* Wednesday, August 4, 1999
*
*-------------------------------------------------------------------------
*/
herr_t
H5FD_set_eoa(H5FD_t *file, H5FD_mem_t type, haddr_t addr)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
HDassert(file && file->cls);
HDassert(H5F_addr_defined(addr) && addr <= file->maxaddr);
/* Dispatch to driver, convert to absolute address */
if((file->cls->set_eoa)(file, type, addr + file->base_addr) < 0)
HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, FAIL, "driver set_eoa request failed")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_set_eoa() */
/*-------------------------------------------------------------------------
* Function: H5FD_get_eoa
*
* Purpose: Private version of H5FDget_eoa()
*
* This function returns the EOA as a RELATIVE address, i.e.
* relative to the base address. This is NOT the same as the
* EOA stored in the superblock, which is an absolute
* address. Object addresses are relative.
*
* Return: Success: First byte after allocated memory.
* Failure: HADDR_UNDEF
*
* Programmer: Robb Matzke
* Wednesday, August 4, 1999
*
*-------------------------------------------------------------------------
*/
haddr_t
H5FD_get_eoa(const H5FD_t *file, H5FD_mem_t type)
{
haddr_t ret_value;
FUNC_ENTER_NOAPI(HADDR_UNDEF)
HDassert(file && file->cls);
/* Dispatch to driver */
if(HADDR_UNDEF == (ret_value = (file->cls->get_eoa)(file, type)))
HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, HADDR_UNDEF, "driver get_eoa request failed")
/* Adjust for base address in file (convert to relative address) */
ret_value -= file->base_addr;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_get_eoa() */
/*-------------------------------------------------------------------------
* Function: H5FD_get_eof
*
* Purpose: Private version of H5FDget_eof()
*
* This function returns the EOF as a RELATIVE address, i.e.
* relative to the base address. This will be different
* from the end of the physical file if there is a user
* block.
*
* Return: Success: The EOF address.
*
* Failure: HADDR_UNDEF
*
* Programmer: Robb Matzke
* Wednesday, August 4, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
haddr_t
H5FD_get_eof(const H5FD_t *file, H5FD_mem_t type)
{
haddr_t ret_value;
FUNC_ENTER_NOAPI(HADDR_UNDEF)
HDassert(file && file->cls);
/* Dispatch to driver */
if(file->cls->get_eof) {
if(HADDR_UNDEF == (ret_value = (file->cls->get_eof)(file, type)))
HGOTO_ERROR(H5E_VFL, H5E_CANTGET, HADDR_UNDEF, "driver get_eof request failed")
} /* end if */
else
ret_value = file->maxaddr;
/* Adjust for base address in file (convert to relative address) */
ret_value -= file->base_addr;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_get_eof() */
|
