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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: Quincey Koziol <koziol@ncsa.uiuc.edu>
* Thursday, September 28, 2000
*
* Purpose: Provides I/O facilities for sequences of bytes stored with various
* layout policies. These routines are similar to the H5Farray.c routines,
* these deal in terms of byte offsets and lengths, not coordinates and
* hyperslab sizes.
*
*/
#define H5D_PACKAGE /*suppress error about including H5Dpkg */
/* Pablo information */
/* (Put before include files to avoid problems with inline functions) */
#define PABLO_MASK H5Dseq_mask
#include "H5private.h" /* Generic Functions */
#include "H5Dpkg.h" /* Datasets */
#include "H5Eprivate.h" /* Error handling */
#include "H5Fprivate.h" /* Files */
#include "H5FDprivate.h" /* File drivers */
#include "H5Iprivate.h" /* IDs */
#include "H5MFprivate.h" /* File space management */
#include "H5MMprivate.h" /* Memory management */
#include "H5Oprivate.h" /* Object headers */
#include "H5Pprivate.h" /* Property lists */
#include "H5Vprivate.h" /* Vector and array functions */
/*-------------------------------------------------------------------------
* Function: H5D_seq_readvv
*
* Purpose: Reads in a vector of byte sequences from a file dataset into a
* buffer in in memory. The data is read from file F and the array's size
* and storage information is in LAYOUT. External files are described
* according to the external file list, EFL. The vector of byte sequences
* offsets is in the DSET_OFFSET array into the dataset (offsets are in
* terms of bytes) and the size of each sequence is in the SEQ_LEN array.
* The total size of the file array is implied in the LAYOUT argument.
* Bytes read into BUF are sequentially stored in the buffer, each sequence
* from the vector stored directly after the previous. The number of
* sequences is NSEQ.
* Purpose: Reads a vector of byte sequences from a vector of byte
* sequences in a file dataset into a buffer in memory. The data is
* read from file F and the array's size and storage information is in
* LAYOUT. External files and chunks are described according to the
* storage information, STORE. The vector of byte sequences offsets for
* the file is in the DSET_OFFSET_ARR array into the dataset (offsets are
* in terms of bytes) and the size of each sequence is in the DSET_LEN_ARR
* array. The vector of byte sequences offsets for memory is in the
* MEM_OFFSET_ARR array into the dataset (offsets are in terms of bytes)
* and the size of each sequence is in the MEM_LEN_ARR array. The total
* size of the file array is implied in the LAYOUT argument. The maximum
* number of sequences in the file dataset and the memory buffer are
* DSET_MAX_NSEQ & MEM_MAX_NSEQ respectively. The current sequence being
* operated on in the file dataset and the memory buffer are DSET_CURR_SEQ
* & MEM_CURR_SEQ respectively. The current sequence being operated on
* will be updated as a result of the operation, as will the offsets and
* lengths of the file dataset and memory buffer sequences.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* Wednesday, May 7, 2003
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
ssize_t
H5D_seq_readvv(H5F_t *f, const struct H5D_dxpl_cache_t *dxpl_cache, hid_t dxpl_id,
H5D_t *dset, const H5D_storage_t *store,
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/*out*/)
{
ssize_t ret_value; /* Return value */
FUNC_ENTER_NOAPI(H5D_seq_readvv, FAIL);
/* Check args */
assert(f);
assert(TRUE==H5P_isa_class(dxpl_id,H5P_DATASET_XFER)); /* Make certain we have the correct type of property list */
assert(dset);
assert(dset_curr_seq);
assert(*dset_curr_seq<dset_max_nseq);
assert(dset_len_arr);
assert(dset_offset_arr);
assert(mem_curr_seq);
assert(*mem_curr_seq<mem_max_nseq);
assert(mem_len_arr);
assert(mem_offset_arr);
assert(buf);
switch (dset->shared->layout.type) {
case H5D_CONTIGUOUS:
/* Read directly from file if the dataset is in an external file */
if (store && store->efl.nused>0) {
/* Note: We can't use data sieve buffers for datasets in external files
* because the 'addr' of all external files is set to 0 (above) and
* all datasets in external files would alias to the same set of
* file offsets, totally mixing up the data sieve buffer information. -QAK
*/
if((ret_value=H5O_efl_readvv(&(store->efl),
dset_max_nseq, dset_curr_seq, dset_len_arr, dset_offset_arr,
mem_max_nseq, mem_curr_seq, mem_len_arr, mem_offset_arr,
buf))<0)
HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "external data read failed");
} else {
/* Pass along the vector of sequences to read */
if((ret_value=H5D_contig_readvv(f, dxpl_id, dset,
dset->shared->layout.u.contig.addr, dset->shared->layout.u.contig.size,
dset_max_nseq, dset_curr_seq, dset_len_arr, dset_offset_arr,
mem_max_nseq, mem_curr_seq, mem_len_arr, mem_offset_arr,
buf))<0)
HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "block read failed");
} /* end else */
break;
case H5D_CHUNKED:
assert(store);
if((ret_value=H5D_istore_readvv(f, dxpl_cache, dxpl_id, dset, store,
dset_max_nseq, dset_curr_seq, dset_len_arr, dset_offset_arr,
mem_max_nseq, mem_curr_seq, mem_len_arr, mem_offset_arr,
buf))<0)
HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "istore read failed");
break;
case H5D_COMPACT:
/* Pass along the vector of sequences to read */
if((ret_value=H5D_compact_readvv(f, dxpl_id, dset,
dset_max_nseq, dset_curr_seq, dset_len_arr, dset_offset_arr,
mem_max_nseq, mem_curr_seq, mem_len_arr, mem_offset_arr,
buf))<0)
HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "compact read failed");
break;
default:
assert("not implemented yet" && 0);
HGOTO_ERROR(H5E_IO, H5E_UNSUPPORTED, FAIL, "unsupported storage layout");
} /* end switch() */
done:
FUNC_LEAVE_NOAPI(ret_value);
} /* H5D_seq_readvv() */
/*-------------------------------------------------------------------------
* Function: H5D_seq_writevv
*
* Purpose: Writes a vector of byte sequences from a buffer in memory into
* a vector of byte sequences in a file dataset. The data is written to
* file F and the array's size and storage information is in LAYOUT.
* External files and chunks are described according to the storage
* information, STORE. The vector of byte sequences offsets for the file
* is in the DSET_OFFSET_ARR array into the dataset (offsets are in
* terms of bytes) and the size of each sequence is in the DSET_LEN_ARR
* array. The vector of byte sequences offsets for memory is in the
* MEM_OFFSET_ARR array into the dataset (offsets are in terms of bytes)
* and the size of each sequence is in the MEM_LEN_ARR array. The total
* size of the file array is implied in the LAYOUT argument. The maximum
* number of sequences in the file dataset and the memory buffer are
* DSET_MAX_NSEQ & MEM_MAX_NSEQ respectively. The current sequence being
* operated on in the file dataset and the memory buffer are DSET_CURR_SEQ
* & MEM_CURR_SEQ respectively. The current sequence being operated on
* will be updated as a result of the operation, as will the offsets and
* lengths of the file dataset and memory buffer sequences.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* Friday, May 2, 2003
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
ssize_t
H5D_seq_writevv(H5F_t *f, const struct H5D_dxpl_cache_t *dxpl_cache,
hid_t dxpl_id, struct H5D_t *dset, const H5D_storage_t *store,
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)
{
ssize_t ret_value; /* Return value */
FUNC_ENTER_NOAPI(H5D_seq_writevv, FAIL);
/* Check args */
assert(f);
assert(TRUE==H5P_isa_class(dxpl_id,H5P_DATASET_XFER)); /* Make certain we have the correct type of property list */
assert(dset);
assert(dset_curr_seq);
assert(*dset_curr_seq<dset_max_nseq);
assert(dset_len_arr);
assert(dset_offset_arr);
assert(mem_curr_seq);
assert(*mem_curr_seq<mem_max_nseq);
assert(mem_len_arr);
assert(mem_offset_arr);
assert(buf);
switch (dset->shared->layout.type) {
case H5D_CONTIGUOUS:
/* Write directly to file if the dataset is in an external file */
if (store && store->efl.nused>0) {
/* Note: We can't use data sieve buffers for datasets in external files
* because the 'addr' of all external files is set to 0 (above) and
* all datasets in external files would alias to the same set of
* file offsets, totally mixing up the data sieve buffer information. -QAK
*/
if ((ret_value=H5O_efl_writevv(&(store->efl),
dset_max_nseq, dset_curr_seq, dset_len_arr, dset_offset_arr,
mem_max_nseq, mem_curr_seq, mem_len_arr, mem_offset_arr,
buf))<0)
HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "external data write failed");
} else {
/* Pass along the vector of sequences to write */
if ((ret_value=H5D_contig_writevv(f, dxpl_id, dset,
dset->shared->layout.u.contig.addr, dset->shared->layout.u.contig.size,
dset_max_nseq, dset_curr_seq, dset_len_arr, dset_offset_arr,
mem_max_nseq, mem_curr_seq, mem_len_arr, mem_offset_arr,
buf))<0)
HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "block write failed");
} /* end else */
break;
case H5D_CHUNKED:
assert(store);
if((ret_value=H5D_istore_writevv(f, dxpl_cache, dxpl_id, dset, store,
dset_max_nseq, dset_curr_seq, dset_len_arr, dset_offset_arr,
mem_max_nseq, mem_curr_seq, mem_len_arr, mem_offset_arr,
buf))<0)
HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "istore write failed");
break;
case H5D_COMPACT:
/* Pass along the vector of sequences to write */
if((ret_value=H5D_compact_writevv(f, dxpl_id, dset,
dset_max_nseq, dset_curr_seq, dset_len_arr, dset_offset_arr,
mem_max_nseq, mem_curr_seq, mem_len_arr, mem_offset_arr,
buf))<0)
HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "compact write failed");
break;
default:
assert("not implemented yet" && 0);
HGOTO_ERROR(H5E_IO, H5E_UNSUPPORTED, FAIL, "unsupported storage layout");
} /* end switch() */
done:
FUNC_LEAVE_NOAPI(ret_value);
} /* H5D_seq_writevv() */
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