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/****************************************************************************
* 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
/* 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_OFFSET(F) ((F)->shared->file_create_parms.offset_size)
#define H5F_SIZEOF_SIZE(F) ((F)->shared->file_create_parms.length_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 */
/*
* 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; \
uint8 *_p = (uint8*)(p)+8; \
for (_i=0; _i<sizeof(int64); _i++, _n<<=8) { \
_n |= *(--_p); \
} \
(p) = (uint8*)(p)+8; \
}
# define UINT64DECODE(p, n) { \
/* WE DON'T CHECK FOR OVERFLOW! */ \
uint64 _n = 0; \
intn _i; \
uint8 *_p = (uint8*)(p)+8; \
for (_i=0; _i<sizeof(uint64); _i++, _n<<=8) { \
_n |= *(--_p); \
} \
(p) = (uint8*)(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 information structure
*/
typedef struct {
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 offset_size; /* Number of bytes for offsets */
uint8 length_size; /* Number of bytes for lengths */
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 */
} file_create_temp_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 {
struct H5F_low_t *(*open)(const char*, uintn);
herr_t (*close)(struct H5F_low_t*);
herr_t (*read)(struct H5F_low_t*, haddr_t, size_t, uint8*);
herr_t (*write)(struct H5F_low_t*, haddr_t, size_t, const uint8*);
herr_t (*flush)(struct H5F_low_t*);
size_t (*size)(struct H5F_low_t*);
} H5F_low_class_t;
typedef struct H5F_low_t {
const H5F_low_class_t *type; /* What type of file is this? */
union {
/* Posix section 2 I/O */
struct {
int fd; /* The unix file descriptor */
H5F_fileop_t op; /* Previous file operation */
haddr_t cur; /* Current file position */
} sec2;
/* Posix stdio */
struct {
FILE *f; /* Posix stdio file */
H5F_fileop_t op; /* Previous file operation */
haddr_t cur; /* Current file position */
} stdio;
} 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 */
/*
* 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 *file_handle; /* Lower level file handle for I/O */
uintn nrefs; /* Ref count for times file is opened */
uint32 consist_flags; /* File Consistency Flags */
haddr_t smallobj_off; /* Offset of small-obj heap within the file */
haddr_t freespace_off; /* Offset of free-space info within the file */
size_t logical_len; /* Logical length of file */
struct H5AC_t *cache; /* The object cache */
file_create_temp_t file_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_OFFSET(f)==4 ? UINT32ENCODE(p,o) \
: H5F_SIZEOF_OFFSET(f)==8 ? UINT64ENCODE(p,o) \
: H5F_SIZEOF_OFFSET(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_OFFSET(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_OFFSET (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*/
/* Private functions, not part of the publicly documented API */
void H5F_encode_length_unusual(const H5F_t *f, uint8 **p, uint8 *l);
void H5F_encode_offset_unusual(const H5F_t *f, uint8 **p, uint8 *o);
H5F_t *H5F_open (const H5F_low_class_t *type, const char *name, uintn flags,
const file_create_temp_t *create_parms);
herr_t H5F_close (H5F_t *f);
herr_t H5F_debug (H5F_t *f, haddr_t addr, FILE *stream, intn indent,
intn fwidth);
/* Functions that operate on indexed storage */
herr_t H5F_istore_new (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, haddr_t addr, size_t size, void *buf);
herr_t H5F_block_write (H5F_t *f, haddr_t addr, size_t size, void *buf);
/* Functions that operate directly on low-level files */
H5F_low_t *H5F_low_open (const H5F_low_class_t *type, const char *name,
uintn flags);
H5F_low_t *H5F_low_close (H5F_low_t *lf);
size_t H5F_low_size (H5F_low_t *lf);
herr_t H5F_low_read (H5F_low_t *lf, haddr_t addr, size_t size, uint8 *buf);
herr_t H5F_low_write (H5F_low_t *lf, haddr_t addr, size_t size,
const uint8 *buf);
#endif
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