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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* Programmer: Robb Matzke <matzke@llnl.gov>
* Thursday, July 29, 1999
*
* Purpose: The POSIX unbuffered file driver using only the HDF5 public
* API and with a few optimizations: the lseek() call is made
* only when the current file position is unknown or needs to be
* changed based on previous I/O through this driver (don't mix
* I/O from this driver with I/O from other parts of the
* application to the same file).
*/
/* Interface initialization */
#define H5_INTERFACE_INIT_FUNC H5FD_sec2_init_interface
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5Fprivate.h" /* File access */
#include "H5FDprivate.h" /* File drivers */
#include "H5FDsec2.h" /* Sec2 file driver */
#include "H5FLprivate.h" /* Free Lists */
#include "H5Iprivate.h" /* IDs */
#include "H5MMprivate.h" /* Memory management */
#include "H5Pprivate.h" /* Property lists */
/* The driver identification number, initialized at runtime */
static hid_t H5FD_SEC2_g = 0;
/* File operations */
#define OP_UNKNOWN 0
#define OP_READ 1
#define OP_WRITE 2
/*
* The description of a file belonging to this driver. The `eoa' and `eof'
* determine the amount of hdf5 address space in use and the high-water mark
* of the file (the current size of the underlying Unix file). The `pos'
* value is used to eliminate file position updates when they would be a
* no-op. Unfortunately we've found systems that use separate file position
* indicators for reading and writing so the lseek can only be eliminated if
* the current operation is the same as the previous operation. When opening
* a file the `eof' will be set to the current file size, `eoa' will be set
* to zero, `pos' will be set to H5F_ADDR_UNDEF (as it is when an error
* occurs), and `op' will be set to H5F_OP_UNKNOWN.
*/
typedef struct H5FD_sec2_t {
H5FD_t pub; /*public stuff, must be first */
int fd; /*the unix file */
haddr_t eoa; /*end of allocated region */
haddr_t eof; /*end of file; current file size*/
haddr_t pos; /*current file I/O position */
int op; /*last operation */
#ifndef WIN32
/*
* On most systems the combination of device and i-node number uniquely
* identify a file.
*/
dev_t device; /*file device number */
#ifdef H5_VMS
ino_t inode[3]; /*file i-node number */
#else
ino_t inode; /*file i-node number */
#endif /*H5_VMS*/
#else
/*
* On WIN32 the low-order word of a unique identifier associated with the
* file and the volume serial number uniquely identify a file. This number
* (which, both? -rpm) may change when the system is restarted or when the
* file is opened. After a process opens a file, the identifier is
* constant until the file is closed. An application can use this
* identifier and the volume serial number to determine whether two
* handles refer to the same file.
*/
DWORD fileindexlo;
DWORD fileindexhi;
#endif
} H5FD_sec2_t;
/*
* This driver supports systems that have the lseek64() function by defining
* some macros here so we don't have to have conditional compilations later
* throughout the code.
*
* file_offset_t: The datatype for file offsets, the second argument of
* the lseek() or lseek64() call.
*
* file_seek: The function which adjusts the current file position,
* either lseek() or lseek64().
*/
/* adding for windows NT file system support. */
#ifdef H5_HAVE_LSEEK64
# define file_offset_t off64_t
# define file_seek lseek64
# define file_truncate ftruncate64
#elif defined (WIN32) && !defined(__MWERKS__)
# /*MSVC*/
# define file_offset_t __int64
# define file_seek _lseeki64
# define file_truncate _chsize
#else
# define file_offset_t off_t
# define file_seek lseek
# define file_truncate HDftruncate
#endif
/*
* These macros check for overflow of various quantities. These macros
* assume that file_offset_t is signed and haddr_t and size_t are unsigned.
*
* ADDR_OVERFLOW: Checks whether a file address of type `haddr_t'
* is too large to be represented by the second argument
* of the file seek function.
*
* SIZE_OVERFLOW: Checks whether a buffer size of type `hsize_t' is too
* large to be represented by the `size_t' type.
*
* REGION_OVERFLOW: Checks whether an address and size pair describe data
* which can be addressed entirely by the second
* argument of the file seek function.
*/
#define MAXADDR (((haddr_t)1<<(8*sizeof(file_offset_t)-1))-1)
#define ADDR_OVERFLOW(A) (HADDR_UNDEF==(A) || \
((A) & ~(haddr_t)MAXADDR))
#define SIZE_OVERFLOW(Z) ((Z) & ~(hsize_t)MAXADDR)
#define REGION_OVERFLOW(A,Z) (ADDR_OVERFLOW(A) || SIZE_OVERFLOW(Z) || \
HADDR_UNDEF==(A)+(Z) || \
(file_offset_t)((A)+(Z))<(file_offset_t)(A))
/* Prototypes */
static H5FD_t *H5FD_sec2_open(const char *name, unsigned flags, hid_t fapl_id,
haddr_t maxaddr);
static herr_t H5FD_sec2_close(H5FD_t *_file);
static int H5FD_sec2_cmp(const H5FD_t *_f1, const H5FD_t *_f2);
static herr_t H5FD_sec2_query(const H5FD_t *_f1, unsigned long *flags);
static haddr_t H5FD_sec2_get_eoa(const H5FD_t *_file, H5FD_mem_t type);
static herr_t H5FD_sec2_set_eoa(H5FD_t *_file, H5FD_mem_t type, haddr_t addr);
static haddr_t H5FD_sec2_get_eof(const H5FD_t *_file);
static herr_t H5FD_sec2_get_handle(H5FD_t *_file, hid_t fapl, void** file_handle);
static herr_t H5FD_sec2_read(H5FD_t *_file, H5FD_mem_t type, hid_t fapl_id, haddr_t addr,
size_t size, void *buf);
static herr_t H5FD_sec2_write(H5FD_t *_file, H5FD_mem_t type, hid_t fapl_id, haddr_t addr,
size_t size, const void *buf);
static herr_t H5FD_sec2_flush(H5FD_t *_file, hid_t dxpl_id, unsigned closing);
static const H5FD_class_t H5FD_sec2_g = {
"sec2", /*name */
MAXADDR, /*maxaddr */
H5F_CLOSE_WEAK, /* fc_degree */
NULL, /*sb_size */
NULL, /*sb_encode */
NULL, /*sb_decode */
0, /*fapl_size */
NULL, /*fapl_get */
NULL, /*fapl_copy */
NULL, /*fapl_free */
0, /*dxpl_size */
NULL, /*dxpl_copy */
NULL, /*dxpl_free */
H5FD_sec2_open, /*open */
H5FD_sec2_close, /*close */
H5FD_sec2_cmp, /*cmp */
H5FD_sec2_query, /*query */
NULL, /*alloc */
NULL, /*free */
H5FD_sec2_get_eoa, /*get_eoa */
H5FD_sec2_set_eoa, /*set_eoa */
H5FD_sec2_get_eof, /*get_eof */
H5FD_sec2_get_handle, /*get_handle */
H5FD_sec2_read, /*read */
H5FD_sec2_write, /*write */
H5FD_sec2_flush, /*flush */
NULL, /*lock */
NULL, /*unlock */
H5FD_FLMAP_SINGLE /*fl_map */
};
/* Declare a free list to manage the H5FD_sec2_t struct */
H5FL_DEFINE_STATIC(H5FD_sec2_t);
/*--------------------------------------------------------------------------
NAME
H5FD_sec2_init_interface -- Initialize interface-specific information
USAGE
herr_t H5FD_sec2_init_interface()
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
Initializes any interface-specific data or routines. (Just calls
H5FD_sec2_init currently).
--------------------------------------------------------------------------*/
static herr_t
H5FD_sec2_init_interface(void)
{
FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5FD_sec2_init_interface)
FUNC_LEAVE_NOAPI(H5FD_sec2_init())
} /* H5FD_sec2_init_interface() */
/*-------------------------------------------------------------------------
* Function: H5FD_sec2_init
*
* Purpose: Initialize this driver by registering the driver with the
* library.
*
* Return: Success: The driver ID for the sec2 driver.
* Failure: Negative.
*
* Programmer: Robb Matzke
* Thursday, July 29, 1999
*
*-------------------------------------------------------------------------
*/
hid_t
H5FD_sec2_init(void)
{
hid_t ret_value; /* Return value */
FUNC_ENTER_NOAPI(H5FD_sec2_init, FAIL)
if(H5I_VFL != H5I_get_type(H5FD_SEC2_g))
H5FD_SEC2_g = H5FD_register(&H5FD_sec2_g, sizeof(H5FD_class_t));
/* Set return value */
ret_value = H5FD_SEC2_g;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_sec2_init() */
/*---------------------------------------------------------------------------
* Function: H5FD_sec2_term
*
* Purpose: Shut down the VFD
*
* Return: <none>
*
* Programmer: Quincey Koziol
* Friday, Jan 30, 2004
*
* Modification:
*
*---------------------------------------------------------------------------
*/
void
H5FD_sec2_term(void)
{
FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5FD_sec2_term)
/* Reset VFL ID */
H5FD_SEC2_g=0;
FUNC_LEAVE_NOAPI_VOID
} /* end H5FD_sec2_term() */
/*-------------------------------------------------------------------------
* Function: H5Pset_fapl_sec2
*
* Purpose: Modify the file access property list to use the H5FD_SEC2
* driver defined in this source file. There are no driver
* specific properties.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Robb Matzke
* Thursday, February 19, 1998
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pset_fapl_sec2(hid_t fapl_id)
{
H5P_genplist_t *plist; /* Property list pointer */
herr_t ret_value;
FUNC_ENTER_API(H5Pset_fapl_sec2, FAIL)
H5TRACE1("e", "i", fapl_id);
if(NULL == (plist = H5P_object_verify(fapl_id,H5P_FILE_ACCESS)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access property list")
ret_value= H5P_set_driver(plist, H5FD_SEC2, NULL);
done:
FUNC_LEAVE_API(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5FD_sec2_open
*
* Purpose: Create and/or opens a Unix file as an HDF5 file.
*
* Return: Success: A pointer to a new file data structure. The
* public fields will be initialized by the
* caller, which is always H5FD_open().
*
* Failure: NULL
*
* Programmer: Robb Matzke
* Thursday, July 29, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
/* ARGSUSED */
static H5FD_t *
H5FD_sec2_open(const char *name, unsigned flags, hid_t UNUSED fapl_id,
haddr_t maxaddr)
{
int o_flags;
int fd=(-1);
H5FD_sec2_t *file=NULL;
#ifdef WIN32
HFILE filehandle;
struct _BY_HANDLE_FILE_INFORMATION fileinfo;
#endif
h5_stat_t sb;
H5FD_t *ret_value;
FUNC_ENTER_NOAPI(H5FD_sec2_open, NULL)
/* Sanity check on file offsets */
assert(sizeof(file_offset_t)>=sizeof(size_t));
/* Check arguments */
if (!name || !*name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "invalid file name")
if (0==maxaddr || HADDR_UNDEF==maxaddr)
HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, NULL, "bogus maxaddr")
if (ADDR_OVERFLOW(maxaddr))
HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, NULL, "bogus maxaddr")
/* Build the open flags */
o_flags = (H5F_ACC_RDWR & flags) ? O_RDWR : O_RDONLY;
if (H5F_ACC_TRUNC & flags) o_flags |= O_TRUNC;
if (H5F_ACC_CREAT & flags) o_flags |= O_CREAT;
if (H5F_ACC_EXCL & flags) o_flags |= O_EXCL;
/* Open the file */
if ((fd=HDopen(name, o_flags, 0666))<0)
HSYS_GOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to open file")
if (HDfstat(fd, &sb)<0)
HSYS_GOTO_ERROR(H5E_FILE, H5E_BADFILE, NULL, "unable to fstat file")
/* Create the new file struct */
if (NULL==(file=H5FL_CALLOC(H5FD_sec2_t)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "unable to allocate file struct")
file->fd = fd;
H5_ASSIGN_OVERFLOW(file->eof,sb.st_size,h5_stat_size_t,haddr_t);
file->pos = HADDR_UNDEF;
file->op = OP_UNKNOWN;
#ifdef WIN32
filehandle = _get_osfhandle(fd);
(void)GetFileInformationByHandle((HANDLE)filehandle, &fileinfo);
file->fileindexhi = fileinfo.nFileIndexHigh;
file->fileindexlo = fileinfo.nFileIndexLow;
#else
file->device = sb.st_dev;
#ifdef H5_VMS
file->inode[0] = sb.st_ino[0];
file->inode[1] = sb.st_ino[1];
file->inode[2] = sb.st_ino[2];
#else
file->inode = sb.st_ino;
#endif /*H5_VMS*/
#endif
/* Set return value */
ret_value=(H5FD_t*)file;
done:
if(ret_value==NULL) {
if(fd>=0)
HDclose(fd);
} /* end if */
FUNC_LEAVE_NOAPI(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5FD_sec2_close
*
* Purpose: Closes a Unix file.
*
* Return: Success: 0
*
* Failure: -1, file not closed.
*
* Programmer: Robb Matzke
* Thursday, July 29, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_sec2_close(H5FD_t *_file)
{
H5FD_sec2_t *file = (H5FD_sec2_t*)_file;
herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5FD_sec2_close, FAIL)
if (HDclose(file->fd)<0)
HSYS_GOTO_ERROR(H5E_IO, H5E_CANTCLOSEFILE, FAIL, "unable to close file")
H5FL_FREE(H5FD_sec2_t,file);
done:
FUNC_LEAVE_NOAPI(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5FD_sec2_cmp
*
* Purpose: Compares two files belonging to this driver using an
* arbitrary (but consistent) ordering.
*
* Return: Success: A value like strcmp()
*
* Failure: never fails (arguments were checked by the
* caller).
*
* Programmer: Robb Matzke
* Thursday, July 29, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static int
H5FD_sec2_cmp(const H5FD_t *_f1, const H5FD_t *_f2)
{
const H5FD_sec2_t *f1 = (const H5FD_sec2_t*)_f1;
const H5FD_sec2_t *f2 = (const H5FD_sec2_t*)_f2;
int ret_value=0;
FUNC_ENTER_NOAPI(H5FD_sec2_cmp, H5FD_VFD_DEFAULT)
#ifdef WIN32
if (f1->fileindexhi < f2->fileindexhi) HGOTO_DONE(-1)
if (f1->fileindexhi > f2->fileindexhi) HGOTO_DONE(1)
if (f1->fileindexlo < f2->fileindexlo) HGOTO_DONE(-1)
if (f1->fileindexlo > f2->fileindexlo) HGOTO_DONE(1)
#else
#ifdef H5_DEV_T_IS_SCALAR
if (f1->device < f2->device) HGOTO_DONE(-1)
if (f1->device > f2->device) HGOTO_DONE(1)
#else /* H5_DEV_T_IS_SCALAR */
/* If dev_t isn't a scalar value on this system, just use memcmp to
* determine if the values are the same or not. The actual return value
* shouldn't really matter...
*/
if(HDmemcmp(&(f1->device),&(f2->device),sizeof(dev_t))<0) HGOTO_DONE(-1)
if(HDmemcmp(&(f1->device),&(f2->device),sizeof(dev_t))>0) HGOTO_DONE(1)
#endif /* H5_DEV_T_IS_SCALAR */
#ifndef H5_VMS
if (f1->inode < f2->inode) HGOTO_DONE(-1)
if (f1->inode > f2->inode) HGOTO_DONE(1)
#else
if(HDmemcmp(&(f1->inode),&(f2->inode),3*sizeof(ino_t))<0) HGOTO_DONE(-1)
if(HDmemcmp(&(f1->inode),&(f2->inode),3*sizeof(ino_t))>0) HGOTO_DONE(1)
#endif /*H5_VMS*/
#endif
done:
FUNC_LEAVE_NOAPI(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5FD_sec2_query
*
* Purpose: Set the flags that this VFL driver is capable of supporting.
* (listed in H5FDpublic.h)
*
* Return: Success: non-negative
*
* Failure: negative
*
* Programmer: Quincey Koziol
* Friday, August 25, 2000
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
/* ARGSUSED */
static herr_t
H5FD_sec2_query(const H5FD_t UNUSED * _f, unsigned long *flags /* out */)
{
herr_t ret_value=SUCCEED;
FUNC_ENTER_NOAPI(H5FD_sec2_query, FAIL)
/* Set the VFL feature flags that this driver supports */
if(flags) {
*flags = 0;
*flags|=H5FD_FEAT_AGGREGATE_METADATA; /* OK to aggregate metadata allocations */
*flags|=H5FD_FEAT_ACCUMULATE_METADATA; /* OK to accumulate metadata for faster writes */
*flags|=H5FD_FEAT_DATA_SIEVE; /* OK to perform data sieving for faster raw data reads & writes */
*flags|=H5FD_FEAT_AGGREGATE_SMALLDATA; /* OK to aggregate "small" raw data allocations */
}
done:
FUNC_LEAVE_NOAPI(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5FD_sec2_get_eoa
*
* Purpose: Gets the end-of-address marker for the file. The EOA marker
* is the first address past the last byte allocated in the
* format address space.
*
* Return: Success: The end-of-address marker.
*
* Failure: HADDR_UNDEF
*
* Programmer: Robb Matzke
* Monday, August 2, 1999
*
* Modifications:
* Raymond Lu
* 21 Dec. 2006
* Added the parameter TYPE. It's only used for MULTI driver.
*
*-------------------------------------------------------------------------
*/
static haddr_t
H5FD_sec2_get_eoa(const H5FD_t *_file, H5FD_mem_t UNUSED type)
{
const H5FD_sec2_t *file = (const H5FD_sec2_t*)_file;
haddr_t ret_value; /* Return value */
FUNC_ENTER_NOAPI(H5FD_sec2_get_eoa, HADDR_UNDEF)
/* Set return value */
ret_value=file->eoa;
done:
FUNC_LEAVE_NOAPI(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5FD_sec2_set_eoa
*
* Purpose: Set the end-of-address marker for the file. This function is
* called shortly after an existing HDF5 file is opened in order
* to tell the driver where the end of the HDF5 data is located.
*
* Return: Success: 0
*
* Failure: -1
*
* Programmer: Robb Matzke
* Thursday, July 29, 1999
*
* Modifications:
* Raymond Lu
* 21 Dec. 2006
* Added the parameter TYPE. It's only used for MULTI driver.
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_sec2_set_eoa(H5FD_t *_file, H5FD_mem_t UNUSED type, haddr_t addr)
{
H5FD_sec2_t *file = (H5FD_sec2_t*)_file;
herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5FD_sec2_set_eoa, FAIL)
file->eoa = addr;
done:
FUNC_LEAVE_NOAPI(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5FD_sec2_get_eof
*
* Purpose: Returns the end-of-file marker, which is the greater of
* either the Unix end-of-file or the HDF5 end-of-address
* markers.
*
* Return: Success: End of file address, the first address past
* the end of the "file", either the Unix file
* or the HDF5 file.
*
* Failure: HADDR_UNDEF
*
* Programmer: Robb Matzke
* Thursday, July 29, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static haddr_t
H5FD_sec2_get_eof(const H5FD_t *_file)
{
const H5FD_sec2_t *file = (const H5FD_sec2_t*)_file;
haddr_t ret_value; /* Return value */
FUNC_ENTER_NOAPI(H5FD_sec2_get_eof, HADDR_UNDEF)
/* Set return value */
ret_value=MAX(file->eof, file->eoa);
done:
FUNC_LEAVE_NOAPI(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5FD_sec2_get_handle
*
* Purpose: Returns the file handle of sec2 file driver.
*
* Returns: Non-negative if succeed or negative if fails.
*
* Programmer: Raymond Lu
* Sept. 16, 2002
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
/* ARGSUSED */
static herr_t
H5FD_sec2_get_handle(H5FD_t *_file, hid_t UNUSED fapl, void** file_handle)
{
H5FD_sec2_t *file = (H5FD_sec2_t *)_file;
herr_t ret_value = SUCCEED;
FUNC_ENTER_NOAPI(H5FD_sec2_get_handle, FAIL)
if(!file_handle)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "file handle not valid")
*file_handle = &(file->fd);
done:
FUNC_LEAVE_NOAPI(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5FD_sec2_read
*
* Purpose: Reads SIZE bytes of data from FILE beginning at address ADDR
* into buffer BUF according to data transfer properties in
* DXPL_ID.
*
* Return: Success: Zero. Result is stored in caller-supplied
* buffer BUF.
*
* Failure: -1, Contents of buffer BUF are undefined.
*
* Programmer: Robb Matzke
* Thursday, July 29, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
/* ARGSUSED */
static herr_t
H5FD_sec2_read(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t UNUSED dxpl_id, haddr_t addr,
size_t size, void *buf/*out*/)
{
H5FD_sec2_t *file = (H5FD_sec2_t*)_file;
ssize_t nbytes;
herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5FD_sec2_read, FAIL)
assert(file && file->pub.cls);
assert(buf);
/* Check for overflow conditions */
if (HADDR_UNDEF==addr)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "addr undefined")
if (REGION_OVERFLOW(addr, size))
HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow")
if (addr+size>file->eoa)
HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow")
/* Seek to the correct location */
if ((addr!=file->pos || OP_READ!=file->op) &&
file_seek(file->fd, (file_offset_t)addr, SEEK_SET)<0)
HSYS_GOTO_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to seek to proper position")
/*
* Read data, being careful of interrupted system calls, partial results,
* and the end of the file.
*/
while (size>0) {
do {
nbytes = HDread(file->fd, buf, size);
} while (-1==nbytes && EINTR==errno);
if (-1==nbytes) /* error */
HSYS_GOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "file read failed")
if (0==nbytes) {
/* end of file but not end of format address space */
HDmemset(buf, 0, size);
break;
}
assert(nbytes>=0);
assert((size_t)nbytes<=size);
H5_CHECK_OVERFLOW(nbytes,ssize_t,size_t);
size -= (size_t)nbytes;
H5_CHECK_OVERFLOW(nbytes,ssize_t,haddr_t);
addr += (haddr_t)nbytes;
buf = (char*)buf + nbytes;
}
/* Update current position */
file->pos = addr;
file->op = OP_READ;
done:
if(ret_value<0) {
/* Reset last file I/O information */
file->pos = HADDR_UNDEF;
file->op = OP_UNKNOWN;
} /* end if */
FUNC_LEAVE_NOAPI(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5FD_sec2_write
*
* Purpose: Writes SIZE bytes of data to FILE beginning at address ADDR
* from buffer BUF according to data transfer properties in
* DXPL_ID.
*
* Return: Success: Zero
*
* Failure: -1
*
* Programmer: Robb Matzke
* Thursday, July 29, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
/* ARGSUSED */
static herr_t
H5FD_sec2_write(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t UNUSED dxpl_id, haddr_t addr,
size_t size, const void *buf)
{
H5FD_sec2_t *file = (H5FD_sec2_t*)_file;
ssize_t nbytes;
herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5FD_sec2_write, FAIL)
assert(file && file->pub.cls);
assert(buf);
/* Check for overflow conditions */
if (HADDR_UNDEF==addr)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "addr undefined")
if (REGION_OVERFLOW(addr, size))
HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow")
if (addr+size>file->eoa)
HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow")
/* Seek to the correct location */
if ((addr!=file->pos || OP_WRITE!=file->op) &&
file_seek(file->fd, (file_offset_t)addr, SEEK_SET)<0)
HSYS_GOTO_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to seek to proper position")
/*
* Write the data, being careful of interrupted system calls and partial
* results
*/
while (size>0) {
do {
nbytes = HDwrite(file->fd, buf, size);
} while (-1==nbytes && EINTR==errno);
if (-1==nbytes) /* error */
HSYS_GOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
assert(nbytes>0);
assert((size_t)nbytes<=size);
H5_CHECK_OVERFLOW(nbytes,ssize_t,size_t);
size -= (size_t)nbytes;
H5_CHECK_OVERFLOW(nbytes,ssize_t,haddr_t);
addr += (haddr_t)nbytes;
buf = (const char*)buf + nbytes;
}
/* Update current position and eof */
file->pos = addr;
file->op = OP_WRITE;
if (file->pos>file->eof)
file->eof = file->pos;
done:
if(ret_value<0) {
/* Reset last file I/O information */
file->pos = HADDR_UNDEF;
file->op = OP_UNKNOWN;
} /* end if */
FUNC_LEAVE_NOAPI(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5FD_sec2_flush
*
* Purpose: Makes sure that the true file size is the same (or larger)
* than the end-of-address.
*
* Return: Success: Non-negative
*
* Failure: Negative
*
* Programmer: Robb Matzke
* Wednesday, August 4, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
/* ARGSUSED */
static herr_t
H5FD_sec2_flush(H5FD_t *_file, hid_t UNUSED dxpl_id, unsigned UNUSED closing)
{
H5FD_sec2_t *file = (H5FD_sec2_t*)_file;
herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5FD_sec2_flush, FAIL)
assert(file);
/* Extend the file to make sure it's large enough */
if (file->eoa!=file->eof) {
#ifdef WIN32
HFILE filehandle; /* Windows file handle */
LARGE_INTEGER li; /* 64-bit integer for SetFilePointer() call */
/* Map the posix file handle to a Windows file handle */
filehandle = _get_osfhandle(file->fd);
/* Translate 64-bit integers into form Windows wants */
/* [This algorithm is from the Windows documentation for SetFilePointer()] */
li.QuadPart = (LONGLONG)file->eoa;
(void)SetFilePointer((HANDLE)filehandle,li.LowPart,&li.HighPart,FILE_BEGIN);
if(SetEndOfFile((HANDLE)filehandle)==0)
HGOTO_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to extend file properly")
#else /* WIN32 */
if (-1==file_truncate(file->fd, (file_offset_t)file->eoa))
HSYS_GOTO_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to extend file properly")
#endif /* WIN32 */
/* Update the eof value */
file->eof = file->eoa;
/* Reset last file I/O information */
file->pos = HADDR_UNDEF;
file->op = OP_UNKNOWN;
}
done:
FUNC_LEAVE_NOAPI(ret_value)
}
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