/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* Programmer: Quincey Koziol <koziol@ncsa.uiuc.edu>
* Thursday, September 30, 2004
*/
#define H5D_PACKAGE /*suppress error about including H5Dpkg */
#include "H5private.h" /* Generic Functions */
#include "H5Dpkg.h" /* Datasets */
#include "H5Eprivate.h" /* Error handling */
#include "H5Fprivate.h" /* Files */
/* PRIVATE PROTOTYPES */
static herr_t H5D_efl_read (const H5O_efl_t *efl, haddr_t addr, size_t size,
uint8_t *buf);
static herr_t H5D_efl_write(const H5O_efl_t *efl, haddr_t addr, size_t size,
const uint8_t *buf);
/*-------------------------------------------------------------------------
* Function: H5D_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: Non-negative on success/Negative on failure
*
* Programmer: Robb Matzke
* Wednesday, March 4, 1998
*
* Modifications:
* Robb Matzke, 1999-07-28
* The ADDR argument is passed by value.
*-------------------------------------------------------------------------
*/
static herr_t
H5D_efl_read (const H5O_efl_t *efl, haddr_t addr, size_t size, uint8_t *buf)
{
int fd=-1;
size_t to_read;
#ifndef NDEBUG
hsize_t tempto_read;
#endif /* NDEBUG */
hsize_t skip=0;
haddr_t cur;
ssize_t n;
size_t u; /* Local index variable */
herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT(H5D_efl_read)
/* Check args */
assert (efl && efl->nused>0);
assert (H5F_addr_defined (addr));
assert (size < SIZET_MAX);
assert (buf || 0==size);
/* Find the first efl member from which to read */
for (u=0, cur=0; u<efl->nused; u++) {
if (H5O_EFL_UNLIMITED==efl->slot[u].size || addr < cur+efl->slot[u].size) {
skip = addr - cur;
break;
}
cur += efl->slot[u].size;
}
/* Read the data */
while (size) {
assert(buf);
if (u>=efl->nused)
HGOTO_ERROR (H5E_EFL, H5E_OVERFLOW, FAIL, "read past logical end of file")
if (H5F_OVERFLOW_HSIZET2OFFT (efl->slot[u].offset+skip))
HGOTO_ERROR (H5E_EFL, H5E_OVERFLOW, FAIL, "external file address overflowed")
if ((fd=HDopen (efl->slot[u].name, O_RDONLY, 0))<0)
HGOTO_ERROR (H5E_EFL, H5E_CANTOPENFILE, FAIL, "unable to open external raw data file")
if (HDlseek (fd, (off_t)(efl->slot[u].offset+skip), SEEK_SET)<0)
HGOTO_ERROR (H5E_EFL, H5E_SEEKERROR, FAIL, "unable to seek in external raw data file")
#ifndef NDEBUG
tempto_read = MIN(efl->slot[u].size-skip,(hsize_t)size);
H5_CHECK_OVERFLOW(tempto_read,hsize_t,size_t);
to_read = (size_t)tempto_read;
#else /* NDEBUG */
to_read = MIN((size_t)(efl->slot[u].size-skip), size);
#endif /* NDEBUG */
if ((n=HDread (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);
}
HDclose (fd);
fd = -1;
size -= to_read;
buf += to_read;
skip = 0;
u++;
}
done:
if (fd>=0)
HDclose (fd);
FUNC_LEAVE_NOAPI(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5D_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: Non-negative on success/Negative on failure
*
* Programmer: Robb Matzke
* Wednesday, March 4, 1998
*
* Modifications:
* Robb Matzke, 1999-07-28
* The ADDR argument is passed by value.
*-------------------------------------------------------------------------
*/
static herr_t
H5D_efl_write (const H5O_efl_t *efl, haddr_t addr, size_t size, const uint8_t *buf)
{
int fd=-1;
size_t to_write;
#ifndef NDEBUG
hsize_t tempto_write;
#endif /* NDEBUG */
haddr_t cur;
hsize_t skip=0;
size_t u; /* Local index variable */
herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT(H5D_efl_write)
/* Check args */
assert (efl && efl->nused>0);
assert (H5F_addr_defined (addr));
assert (size < SIZET_MAX);
assert (buf || 0==size);
/* Find the first efl member in which to write */
for (u=0, cur=0; u<efl->nused; u++) {
if (H5O_EFL_UNLIMITED==efl->slot[u].size || addr < cur+efl->slot[u].size) {
skip = addr - cur;
break;
}
cur += efl->slot[u].size;
}
/* Write the data */
while (size) {
assert(buf);
if (u>=efl->nused)
HGOTO_ERROR (H5E_EFL, H5E_OVERFLOW, FAIL, "write past logical end of file")
if (H5F_OVERFLOW_HSIZET2OFFT (efl->slot[u].offset+skip))
HGOTO_ERROR (H5E_EFL, H5E_OVERFLOW, FAIL, "external file address overflowed")
if ((fd=HDopen (efl->slot[u].name, O_CREAT|O_RDWR, 0666))<0) {
if (HDaccess (efl->slot[u].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 (HDlseek (fd, (off_t)(efl->slot[u].offset+skip), SEEK_SET)<0)
HGOTO_ERROR (H5E_EFL, H5E_SEEKERROR, FAIL, "unable to seek in external raw data file")
#ifndef NDEBUG
tempto_write = MIN(efl->slot[u].size-skip,(hsize_t)size);
H5_CHECK_OVERFLOW(tempto_write,hsize_t,size_t);
to_write = (size_t)tempto_write;
#else /* NDEBUG */
to_write = MIN((size_t)(efl->slot[u].size-skip), size);
#endif /* NDEBUG */
if ((size_t)HDwrite (fd, buf, to_write)!=to_write)
HGOTO_ERROR (H5E_EFL, H5E_READERROR, FAIL, "write error in external raw data file")
HDclose (fd);
fd = -1;
size -= to_write;
buf += to_write;
skip = 0;
u++;
}
done:
if (fd>=0)
HDclose (fd);
FUNC_LEAVE_NOAPI(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5D_efl_readvv
*
* 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: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* Wednesday, May 7, 2003
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
ssize_t
H5D_efl_readvv(const H5D_io_info_t *io_info,
size_t dset_max_nseq, size_t *dset_curr_seq, size_t dset_len_arr[], hsize_t dset_offset_arr[],
size_t mem_max_nseq, size_t *mem_curr_seq, size_t mem_len_arr[], hsize_t mem_offset_arr[],
void *_buf)
{
const H5O_efl_t *efl=&(io_info->store->efl); /* Pointer to efl info */
unsigned char *buf; /* Pointer to buffer to write */
haddr_t addr; /* Actual address to read */
size_t total_size=0; /* Total size of sequence in bytes */
size_t size; /* Size of sequence in bytes */
size_t u; /* Counting variable */
size_t v; /* Counting variable */
ssize_t ret_value; /* Return value */
FUNC_ENTER_NOAPI(H5D_efl_readvv, FAIL)
/* Check args */
assert (efl && efl->nused>0);
assert (_buf);
/* Work through all the sequences */
for(u=*dset_curr_seq, v=*mem_curr_seq; u<dset_max_nseq && v<mem_max_nseq; ) {
/* Choose smallest buffer to write */
if(mem_len_arr[v]<dset_len_arr[u])
size=mem_len_arr[v];
else
size=dset_len_arr[u];
/* Compute offset on disk */
addr=dset_offset_arr[u];
/* Compute offset in memory */
buf = (unsigned char *)_buf + mem_offset_arr[v];
/* Read data */
if (H5D_efl_read(efl, addr, size, buf)<0)
HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "block write failed")
/* Update memory information */
mem_len_arr[v]-=size;
mem_offset_arr[v]+=size;
if(mem_len_arr[v]==0)
v++;
/* Update file information */
dset_len_arr[u]-=size;
dset_offset_arr[u]+=size;
if(dset_len_arr[u]==0)
u++;
/* Increment number of bytes copied */
total_size+=size;
} /* end for */
/* Update current sequence vectors */
*dset_curr_seq=u;
*mem_curr_seq=v;
/* Set return value */
H5_ASSIGN_OVERFLOW(ret_value,total_size,size_t,ssize_t);
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D_efl_readvv() */
/*-------------------------------------------------------------------------
* Function: H5D_efl_writevv
*
* 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: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* Friday, May 2, 2003
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
ssize_t
H5D_efl_writevv(const H5D_io_info_t *io_info,
size_t dset_max_nseq, size_t *dset_curr_seq, size_t dset_len_arr[], hsize_t dset_offset_arr[],
size_t mem_max_nseq, size_t *mem_curr_seq, size_t mem_len_arr[], hsize_t mem_offset_arr[],
const void *_buf)
{
const H5O_efl_t *efl=&(io_info->store->efl); /* Pointer to efl info */
const unsigned char *buf; /* Pointer to buffer to write */
haddr_t addr; /* Actual address to read */
size_t total_size=0; /* Total size of sequence in bytes */
size_t size; /* Size of sequence in bytes */
size_t u; /* Counting variable */
size_t v; /* Counting variable */
ssize_t ret_value; /* Return value */
FUNC_ENTER_NOAPI(H5D_efl_writevv, FAIL)
/* Check args */
assert (efl && efl->nused>0);
assert (_buf);
/* Work through all the sequences */
for(u=*dset_curr_seq, v=*mem_curr_seq; u<dset_max_nseq && v<mem_max_nseq; ) {
/* Choose smallest buffer to write */
if(mem_len_arr[v]<dset_len_arr[u])
size=mem_len_arr[v];
else
size=dset_len_arr[u];
/* Compute offset on disk */
addr=dset_offset_arr[u];
/* Compute offset in memory */
buf = (const unsigned char *)_buf + mem_offset_arr[v];
/* Write data */
if (H5D_efl_write(efl, addr, size, buf)<0)
HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "block write failed")
/* Update memory information */
mem_len_arr[v]-=size;
mem_offset_arr[v]+=size;
if(mem_len_arr[v]==0)
v++;
/* Update file information */
dset_len_arr[u]-=size;
dset_offset_arr[u]+=size;
if(dset_len_arr[u]==0)
u++;
/* Increment number of bytes copied */
total_size+=size;
} /* end for */
/* Update current sequence vectors */
*dset_curr_seq=u;
*mem_curr_seq=v;
/* Set return value */
H5_ASSIGN_OVERFLOW(ret_value,total_size,size_t,ssize_t);
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D_efl_writevv() */
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