summaryrefslogtreecommitdiffstats
path: root/src/H5Fprivate.h
blob: 31748b24d892e1c00525676403e488356afc4bbd (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
/****************************************************************************
 * NCSA HDF                                                                 *
 * Software Development Group                                               *
 * National Center for Supercomputing Applications                          *
 * University of Illinois at Urbana-Champaign                               *
 * 605 E. Springfield, Champaign IL 61820                                   *
 *                                                                          *
 * For conditions of distribution and use, see the accompanying             *
 * hdf/COPYING file.                                                        *
 *                                                                          *
 ****************************************************************************/

/* $Id$ */

/*
 * This file contains macros & information for file access
 */

#ifndef _H5Fprivate_H
#define _H5Fprivate_H
#include <H5Fpublic.h>

/* This is a near top-level header! Try not to include much! */
#include <H5private.h>

/*
 * Feature: Define this constant to be non-zero if you want to enable code
 *	    that minimizes the number of calls to lseek().  This has a huge
 *	    performance benefit on some systems.  Set this constant to zero
 *	    on the compiler command line to disable that optimization.
 */
#ifndef H5F_OPT_SEEK
#  define H5F_OPT_SEEK 1
#endif

/*
 * Feature: Define this constant on the compiler command-line if you want to
 *	    see some debugging messages on stderr.
 */
#ifdef NDEBUG
#  undef H5F_DEBUG
#endif

/* Maximum size of boot-block buffer */
#define H5F_BOOTBLOCK_SIZE  1024

/* Define the HDF5 file signature */
#define H5F_SIGNATURE     "\211HDF\r\n\032\n"
#define H5F_SIGNATURE_LEN 8

/* size of size_t and off_t as they exist on disk */
#define H5F_SIZEOF_ADDR(F)	((F)->shared->create_parms.sizeof_addr)
#define H5F_SIZEOF_SIZE(F)	((F)->shared->create_parms.sizeof_size)

/*
 * File open flags.
 */
#define H5F_ACC_WRITE	0x0001	/* Open file for read/write access	*/
#define H5F_ACC_CREAT	0x0002	/* Create non-existing files		*/
#define H5F_ACC_EXCL	0x0004	/* Fail if file exists			*/
#define H5F_ACC_TRUNC	0x0008	/* Truncate existing file		*/
#define H5F_ACC_DEBUG	0x00010	/* Print debug info			*/


/*
 * Encode and decode macros for file meta-data.
 * Currently, all file meta-data is little-endian.
 */

/* For non-little-endian platforms, encode each byte by itself */
#ifdef WORDS_BIGENDIAN
#  define INT16ENCODE(p, i) {						      \
   *(p) = (uint8)( (uintn)(i)       & 0xff); (p)++;			      \
   *(p) = (uint8)(((uintn)(i) >> 8) & 0xff); (p)++;			      \
}

#  define UINT16ENCODE(p, i) {						      \
   *(p) = (uint8)(        (i)       & 0xff); (p)++;			      \
   *(p) = (uint8)(((uintn)(i) >> 8) & 0xff); (p)++;			      \
}

#  define INT32ENCODE(p, i) {						      \
   *(p) = (uint8)( (uint32)(i)        & 0xff); (p)++;			      \
   *(p) = (uint8)(((uint32)(i) >>  8) & 0xff); (p)++;			      \
   *(p) = (uint8)(((uint32)(i) >> 16) & 0xff); (p)++;			      \
   *(p) = (uint8)(((uint32)(i) >> 24) & 0xff); (p)++;			      \
}

#  define UINT32ENCODE(p, i) {						      \
   *(p) = (uint8)( (i)        & 0xff); (p)++;				      \
   *(p) = (uint8)(((i) >>  8) & 0xff); (p)++;				      \
   *(p) = (uint8)(((i) >> 16) & 0xff); (p)++;				      \
   *(p) = (uint8)(((i) >> 24) & 0xff); (p)++;				      \
}

#  define INT64ENCODE(p, n) {						      \
   int64 _n = (n);							      \
   intn _i;								      \
   uint8 *_p = (uint8*)(p);						      \
   for (_i=0; _i<sizeof(int64); _i++, _n>>=8) {				      \
      *_p++ = _n & 0xff;						      \
   }									      \
   for (/*void*/; _i<8; _i++) {						      \
      *_p++ = (n)<0 ? 0xff : 0;						      \
   }									      \
   (p) = (uint8*)(p)+8;							      \
}

#  define UINT64ENCODE(p, n) {						      \
   uint64 _n = (n);							      \
   intn _i;								      \
   uint8 *_p = (uint8*)(p);						      \
   for (_i=0; _i<sizeof(uint64); _i++, _n>>=8) {			      \
      *_p++ = _n & 0xff;						      \
   }									      \
   for (/*void*/; _i<8; _i++) {						      \
      *_p++ = 0;							      \
   }									      \
   (p) = (uint8*)(p)+8;							      \
}

#  define INT16DECODE(p, i) {						      \
   (i)  = (int16)((*(p) & 0xff));      (p)++;				      \
   (i) |= (int16)((*(p) & 0xff) << 8); (p)++;				      \
}

#  define UINT16DECODE(p, i) {						      \
   (i)  = (uint16) (*(p) & 0xff);       (p)++;				      \
   (i) |= (uint16)((*(p) & 0xff) << 8); (p)++;				      \
}

#  define INT32DECODE(p, i) {						      \
   (i)  = (        *(p) & 0xff);        (p)++;				      \
   (i) |= ((int32)(*(p) & 0xff) <<  8); (p)++;				      \
   (i) |= ((int32)(*(p) & 0xff) << 16); (p)++;				      \
   (i) |= ((int32)(*(p) & 0xff) << 24); (p)++;				      \
}

#  define UINT32DECODE(p, i) {						      \
   (i)  =  (uint32)(*(p) & 0xff);        (p)++;				      \
   (i) |= ((uint32)(*(p) & 0xff) <<  8); (p)++;				      \
   (i) |= ((uint32)(*(p) & 0xff) << 16); (p)++;				      \
   (i) |= ((uint32)(*(p) & 0xff) << 24); (p)++;				      \
}

#  define INT64DECODE(p, n) {						      \
   /* WE DON'T CHECK FOR OVERFLOW! */					      \
   int64 _n = 0;							      \
   intn _i;								      \
   (p) += 8; 								      \
   for (_i=0; _i<sizeof(int64); _i++, _n<<=8) {				      \
      _n |= *(--p);							      \
   }									      \
   (p) += 8;								      \
}

#  define UINT64DECODE(p, n) {						      \
   /* WE DON'T CHECK FOR OVERFLOW! */					      \
   uint64 _n = 0;							      \
   intn _i;								      \
   (p) += 8;								      \
   for (_i=0; _i<sizeof(uint64); _i++, _n<<=8) {			      \
      _n |= *(--p);							      \
   }									      \
   (p) += 8;								      \
}

#else
   /* For little-endian platforms, make the compiler do the work */
#  define INT16ENCODE(p, i)  { *((int16 *)(p)) = (int16)(i); (p)+=2; }
#  define UINT16ENCODE(p, i) { *((uint16 *)(p)) = (uint16)(i); (p)+=2; }
#  define INT32ENCODE(p, i)  { *((int32 *)(p)) = (int32)(i); (p)+=4; }
#  define UINT32ENCODE(p, i) { *((uint32 *)(p)) = (uint32)(i); (p)+=4; }

#  define INT64ENCODE(p, i)  {						      \
   *((int64 *)(p)) = (int64)(i);					      \
   (p) += sizeof(int64);						      \
   if (4==sizeof(int64)) {						      \
      *(p)++ = (i)<0?0xff:0x00;						      \
      *(p)++ = (i)<0?0xff:0x00;						      \
      *(p)++ = (i)<0?0xff:0x00;						      \
      *(p)++ = (i)<0?0xff:0x00;						      \
   }									      \
}

#  define UINT64ENCODE(p, i) {						      \
   *((uint64 *)(p)) = (uint64)(i);					      \
   (p) += sizeof(uint64);						      \
   if (4==sizeof(uint64)) {						      \
      *(p)++ = 0x00;							      \
      *(p)++ = 0x00;							      \
      *(p)++ = 0x00;							      \
      *(p)++ = 0x00;							      \
   }									      \
}

#  define INT16DECODE(p, i)  { (i) = (int16)(*(const int16 *)(p)); (p)+=2; }
#  define UINT16DECODE(p, i) { (i) = (uint16)(*(const uint16 *)(p)); (p)+=2; }
#  define INT32DECODE(p, i)  { (i) = (int32)(*(const int32 *)(p)); (p)+=4; }
#  define UINT32DECODE(p, i) { (i) = (uint32)(*(const uint32 *)(p)); (p)+=4; }
#  define INT64DECODE(p, i)  { (i) = (int64)(*(const int64 *)(p)); (p)+=8; }
#  define UINT64DECODE(p, i) { (i) = (uint64)(*(const uint64 *)(p)); (p)+=8; }

#endif

#define NBYTEENCODE(d, s, n) {   HDmemcpy(d,s,n); p+=n }

/* Note! the NBYTEDECODE macro is backwards from the memcpy() routine, */
/*      in the spirit of the other DECODE macros */
#define NBYTEDECODE(s, d, n) {   HDmemcpy(d,s,n); p+=n }

/*
 * File-creation template.
 */
typedef struct H5F_create_t {
   uintn userblock_size;	/* Size of the file user block in bytes	*/
   uintn sym_leaf_k;		/* 1/2 rank for symbol table leaf nodes */
   uintn btree_k[8];		/* 1/2 rank for btree internal nodes 	*/
   uint8 sizeof_addr;          	/* Number of bytes in an address	*/
   uint8 sizeof_size;          	/* Number of bytes for obj sizes	*/
   uint8 bootblock_ver;        	/* Version # of the bootblock 		*/
   uint8 smallobject_ver;      	/* Version # of the small-object heap 	*/
   uint8 freespace_ver;        	/* Version # of the free-space information */
   uint8 objectdir_ver;        	/* Version # of the object directory format */
   uint8 sharedheader_ver;     	/* Version # of the shared header format */
} H5F_create_t;

/*
 * These things make a file unique.
 */
typedef struct H5F_search_t {
   dev_t	dev;		/* Device number containing file	*/
   ino_t	ino;		/* Unique file number on device		*/
} H5F_search_t;

/* For determining what the last file operation was */
typedef enum {
   H5F_OP_UNKNOWN,	   	/* Don't know what the last operation was */
   H5F_OP_SEEK,          	/* Last operation was a seek		*/
   H5F_OP_WRITE,         	/* Last operation was a write		*/
   H5F_OP_READ           	/* Last operation was a read		*/
} H5F_fileop_t;

/*
 * Define the low-level file interface.
 */
typedef struct H5F_low_class_t {
   hbool_t (*access)(const char*, int, H5F_search_t*);
   struct H5F_low_t *(*open)(const char*, uintn, H5F_search_t*);
   herr_t (*close)(struct H5F_low_t*);
   herr_t (*read)(struct H5F_low_t*, const haddr_t*, size_t, uint8*);
   herr_t (*write)(struct H5F_low_t*, const haddr_t*, size_t, const uint8*);
   herr_t (*flush)(struct H5F_low_t*);
   herr_t (*extend)(struct H5F_low_t*, intn, size_t, haddr_t*);
} H5F_low_class_t;

typedef struct H5F_low_t {
   const H5F_low_class_t *type;	/* What type of file is this?		*/
   haddr_t		eof;	/* Address of logical end-of-file	*/
   union {

      /* File families */
      struct {
	 char		*name;	/* Family name				*/
	 uintn		flags;	/* Flags for opening member files	*/
	 intn		nmemb;	/* Number of family members		*/
	 intn		nalloc;	/* Size of member table in elements	*/
	 struct H5F_low_t **memb;/* An array of family members		*/
	 size_t		offset_bits;/* Number of bits in a member offset*/
      } fam;

      /* Split meta/raw data */
      struct {
	 char		*name;	/* Base name w/o extension		*/
	 uint64		mask;	/* Bit that determines which file to use*/
	 struct H5F_low_t *meta;/* Meta data file			*/
	 struct H5F_low_t *raw;	/* Raw data file			*/
      } split;

      /* Posix section 2 I/O */
      struct {
	 int		fd;	/* The unix file descriptor		*/
	 H5F_fileop_t	op;	/* Previous file operation		*/
	 off_t		cur;	/* Current file position		*/
      } sec2;

      /* Posix stdio */
      struct {
	 FILE		*f;	/* Posix stdio file			*/
	 H5F_fileop_t	op;	/* Previous file operation		*/
	 off_t		cur;	/* Current file position		*/
      } stdio;

      /* In-core temp file */
      struct {
	 uint8		*mem;	/* Mem image of the file		*/
	 size_t		size;	/* Current file size			*/
	 size_t		alloc;	/* Current size of MEM buffer		*/
      } core;
      
   } u;
} H5F_low_t;

/* What types of low-level files are there? */
#ifndef H5F_LOW_DFLT
#  define H5F_LOW_DFLT	H5F_LOW_STDIO		/* The default type	*/
#endif
extern const H5F_low_class_t H5F_LOW_SEC2[];	/* Posix section 2	*/
extern const H5F_low_class_t H5F_LOW_STDIO[];	/* Posix stdio 		*/
extern const H5F_low_class_t H5F_LOW_CORE[];	/* In-core temp file	*/
extern const H5F_low_class_t H5F_LOW_FAM[];	/* File family		*/
extern const H5F_low_class_t H5F_LOW_SPLIT[];	/* Split meta/raw data	*/

/*
 * Define the structure to store the file information for HDF5 files. One of
 * these structures is allocated per file, not per H5Fopen().
 */
typedef struct H5F_file_t {
   H5F_search_t	key;		/* The key for looking up files		*/
   uintn	flags;         	/* Access Permissions for file		*/
   H5F_low_t	*lf;		/* Lower level file handle for I/O	*/
   uintn	nrefs;        	/* Ref count for times file is opened 	*/
   uint32 	consist_flags; 	/* File Consistency Flags 		*/
   haddr_t	boot_addr;	/* Absolute address of boot block	*/
   haddr_t	base_addr;	/* Absolute base address for rel.addrs.	*/
   haddr_t 	smallobj_addr; 	/* Relative address of small-obj heap 	*/
   haddr_t 	freespace_addr;	/* Relative address of free-space info	*/
   haddr_t	hdf5_eof;	/* Relative addr of end of all hdf5 data*/
   struct H5AC_t *cache; 	/* The object cache 			*/
   H5F_create_t	create_parms;	/* File-creation template 		*/
#ifdef LATER
   file_access_temp_t file_access_parms; /* File-access template	*/
#endif
   struct H5G_entry_t *root_sym; /* Root symbol table entry		*/
   uintn nshadows;		/* Size of shadow hash table		*/
   struct H5G_hash_t **shadow;	/* The shadow hash table		*/
} H5F_file_t;

/*
 * This is the top-level file descriptor.  One of these structures is
 * allocated every time H5Fopen() is called although they may contain
 * pointers to shared H5F_file_t structs.
 */
typedef struct H5F_t {
   uintn	intent;		/* The flags passed to H5F_open()	*/
   char		*name;		/* Name used to open file		*/
   H5F_file_t	*shared;	/* The shared file info			*/
   struct H5G_cwgstk_t *cwg_stack; /* CWG stack for push/pop functions	*/
} H5F_t;




#ifdef NOT_YET
#define H5F_ENCODE_OFFSET(f,p,o) (H5F_SIZEOF_ADDR(f)==4 ? UINT32ENCODE(p,o) \
    : H5F_SIZEOF_ADDR(f)==8 ? UINT64ENCODE(p,o) \
    : H5F_SIZEOF_ADDR(f)==2 ? UINT16ENCODE(p,o) \
    : H5FPencode_unusual_offset(f,&(p),(uint8 *)&(o)))
#else /* NOT_YET */
#define H5F_ENCODE_OFFSET(f,p,o) switch(H5F_SIZEOF_ADDR(f)) { case 4: UINT32ENCODE(p,o); break;\
    case 8: UINT64ENCODE(p,o); break;\
    case 2: UINT16ENCODE(p,o); break;}
#endif /* NOT_YET */

#define H5F_DECODE_OFFSET(f,p,o)					      \
   switch (H5F_SIZEOF_ADDR (f)) {					      \
   case 4:								      \
      UINT32DECODE (p, o);						      \
      break;								      \
   case 8:								      \
      UINT64DECODE (p, o);						      \
      break;								      \
   case 2:								      \
      UINT16DECODE (p, o);						      \
      break;								      \
   }

#ifdef NOT_YET
#define H5F_encode_length(f,p,l) (H5F_SIZEOF_SIZE(f)==4 ? UINT32ENCODE(p,l) \
    : H5F_SIZEOF_SIZE(f)==8 ? UINT64ENCODE(p,l) \
    : H5F_SIZEOF_SIZE(f)==2 ? UINT16ENCODE(p,l) : H5FPencode_unusual_length(f,&(p),(uint8 *)&(l)))
#else
#define H5F_encode_length(f,p,l)					      \
   switch(H5F_SIZEOF_SIZE(f)) {						      \
   case 4: UINT32ENCODE(p,l); break;					      \
   case 8: UINT64ENCODE(p,l); break;					      \
   case 2: UINT16ENCODE(p,l); break;					      \
}
#endif

#define H5F_decode_length(f,p,l)					      \
   switch(H5F_SIZEOF_SIZE(f)) {						      \
   case 4: UINT32DECODE(p,l); break;					      \
   case 8: UINT64DECODE(p,l); break;					      \
   case 2: UINT16DECODE(p,l); break;					      \
}

struct H5O_istore_t; /*forward decl for prototype arguments*/

/* library variables */
extern const H5F_create_t H5F_create_dflt;

/* Private functions, not part of the publicly documented API */
void H5F_encode_length_unusual(const H5F_t *f, uint8 **p, uint8 *l);
H5F_t *H5F_open (const H5F_low_class_t *type, const char *name, uintn flags,
		 const H5F_create_t *create_parms);
herr_t H5F_close (H5F_t *f);
herr_t H5F_debug (H5F_t *f, const haddr_t *addr, FILE *stream, intn indent,
		  intn fwidth);

/* Functions that operate on indexed storage */
herr_t H5F_istore_create (H5F_t *f, struct H5O_istore_t *istore,
			  uintn ndims, const size_t alignment[]);
herr_t H5F_istore_read (H5F_t *f, const struct H5O_istore_t *mesg,
			const size_t offset[], const size_t size[],
			void *buf);
herr_t H5F_istore_write (H5F_t *f, const struct H5O_istore_t *mesg,
			 const size_t offset[], const size_t size[],
			 void *buf);

/* Functions that operate on contiguous storage wrt boot block */
herr_t H5F_block_read (H5F_t *f, const haddr_t *addr, size_t size, void *buf);
herr_t H5F_block_write (H5F_t *f, const haddr_t *addr, size_t size,
			const void *buf);

/* Functions that operate directly on low-level files */
herr_t H5F_low_extend (H5F_low_t *lf, intn op, size_t size, haddr_t *addr);
herr_t H5F_low_seteof (H5F_low_t *lf, const haddr_t *addr);
hbool_t H5F_low_access (const H5F_low_class_t *type, const char *name,
			int mode, H5F_search_t *key);
H5F_low_t *H5F_low_open (const H5F_low_class_t *type, const char *name,
			 uintn flags, H5F_search_t *key);
H5F_low_t *H5F_low_close (H5F_low_t *lf);
size_t H5F_low_size (H5F_low_t *lf, haddr_t *addr);
herr_t H5F_low_read (H5F_low_t *lf, const haddr_t *addr, size_t size,
		     uint8 *buf);
herr_t H5F_low_write (H5F_low_t *lf, const haddr_t *addr, size_t size,
		      const uint8 *buf);
herr_t H5F_low_flush (H5F_low_t *lf);


/* Functions that operate on addresses */
#define H5F_addr_eq(A1,A2) (H5F_addr_cmp(A1,A2)==0)
#define H5F_addr_ne(A1,A2) (H5F_addr_cmp(A1,A2)!=0)
#define H5F_addr_lt(A1,A2) (H5F_addr_cmp(A1,A2)<0)
#define H5F_addr_le(A1,A2) (H5F_addr_cmp(A1,A2)<=0)
#define H5F_addr_gt(A1,A2) (H5F_addr_cmp(A1,A2)>0)
#define H5F_addr_ge(A1,A2) (H5F_addr_cmp(A1,A2)>=0)
intn H5F_addr_cmp (const haddr_t*, const haddr_t*);
hbool_t H5F_addr_defined (const haddr_t*);
void H5F_addr_undef (haddr_t*);
void H5F_addr_reset (haddr_t*);
hbool_t H5F_addr_zerop (const haddr_t*);
void H5F_addr_encode (H5F_t*, uint8**, const haddr_t*);
void H5F_addr_decode (H5F_t*, const uint8**, haddr_t*);
void H5F_addr_print (FILE*, const haddr_t*);
void H5F_addr_pow2 (uintn, haddr_t*);
void H5F_addr_inc (haddr_t*, size_t);
void H5F_addr_add (haddr_t*, const haddr_t *);
uintn H5F_addr_hash (const haddr_t*, uintn mod);

#endif