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/*
* Copyright (C) 1998 Spizella Software
* All rights reserved.
*
* Programmer: Robb Matzke <robb@arborea.spizella.com>
* Thursday, January 15, 1998
*
* Purpose: Provides I/O facilities for multi-dimensional arrays of bytes
* stored with various layout policies.
*/
#include <H5private.h>
#include <H5Dprivate.h>
#include <H5Eprivate.h>
#include <H5Fprivate.h>
#include <H5MFprivate.h>
#include <H5Oprivate.h>
/* Interface initialization */
#define PABLO_MASK H5F_arr_mask
#define INTERFACE_INIT NULL
static intn interface_initialize_g = FALSE;
/*-------------------------------------------------------------------------
* Function: H5F_arr_create
*
* Purpose: Creates an array of bytes. When called to create an array of
* some type, the fastest varying dimension corresponds to an
* instance of that type. That is, a 10x20 array of int32 is
* really a 10x20x4 array of bytes.
*
* Return: Success: SUCCEED
*
* Failure: FAIL
*
* Programmer: Robb Matzke
* Friday, January 16, 1998
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t
H5F_arr_create (H5F_t *f, struct H5O_layout_t *layout/*in,out*/)
{
intn i;
size_t nbytes;
FUNC_ENTER (H5F_arr_create, FAIL);
/* check args */
assert (f);
assert (layout);
H5F_addr_undef (&(layout->addr)); /*just in case we fail*/
switch (layout->type) {
case H5D_CONTIGUOUS:
/* Reserve space in the file for the entire array */
for (i=0, nbytes=1; i<layout->ndims; i++) nbytes *= layout->dim[i];
assert (nbytes>0);
if (H5MF_alloc (f, H5MF_RAW, nbytes, &(layout->addr)/*out*/)<0) {
HRETURN_ERROR (H5E_IO, H5E_NOSPACE, FAIL,
"unable to reserve file space");
}
break;
case H5D_CHUNKED:
/* Create the root of the B-tree that describes chunked storage */
if (H5F_istore_create (f, layout/*out*/)<0) {
HRETURN_ERROR (H5E_IO, H5E_CANTINIT, FAIL,
"unable to initialize chunked storage");
}
break;
default:
assert ("not implemented yet" && 0);
HRETURN_ERROR (H5E_IO, H5E_UNSUPPORTED, FAIL,
"unsupported storage layout");
break;
}
FUNC_LEAVE (SUCCEED);
}
/*-------------------------------------------------------------------------
* Function: H5F_arr_read
*
* Purpose: Reads a hyperslab of a file byte array into a byte array in
* memory which has the same dimensions as the hyperslab.
*
* Return: Success: SUCCEED
*
* Failure: FAIL
*
* Programmer: Robb Matzke
* Friday, January 16, 1998
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t H5F_arr_read (H5F_t *f, const struct H5O_layout_t *layout,
const size_t offset[], const size_t size[],
void *buf/*out*/)
{
intn i;
size_t nbytes;
size_t zero_offset[H5O_LAYOUT_NDIMS];
FUNC_ENTER (H5F_arr_read, FAIL);
/* Check args */
assert (f);
assert (layout);
if (!offset) {
HDmemset (zero_offset, 0, sizeof zero_offset);
offset = zero_offset;
}
assert (size);
assert (buf);
switch (layout->type) {
case H5D_CONTIGUOUS:
/*
* We currently only support complete I/O.
*/
for (i=0; i<layout->ndims; i++) {
assert (0==offset[i]);
assert (size[i]==layout->dim[i]);
}
for (i=0, nbytes=1; i<layout->ndims; i++) nbytes *= layout->dim[i];
if (H5F_block_read (f, &(layout->addr), nbytes, buf)<0) {
HRETURN_ERROR (H5E_IO, H5E_READERROR, FAIL, "block read failed");
}
break;
case H5D_CHUNKED:
if (H5F_istore_read (f, layout, offset, size, buf)<0) {
HRETURN_ERROR (H5E_IO, H5E_READERROR, FAIL, "chunked read failed");
}
break;
default:
assert ("not implemented yet" && 0);
HRETURN_ERROR (H5E_IO, H5E_UNSUPPORTED, FAIL,
"unsupported storage layout");
break;
}
FUNC_LEAVE (SUCCEED);
}
/*-------------------------------------------------------------------------
* Function: H5F_arr_write
*
* Purpose: Writes an array to a hyperslab of a file byte array. The
* memory array and the hyperslab are the same size.
*
* Return: Success: SUCCEED
*
* Failure: FAIL
*
* Programmer: Robb Matzke
* Friday, January 16, 1998
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t H5F_arr_write (H5F_t *f, const struct H5O_layout_t *layout,
const size_t offset[], const size_t size[],
const void *buf)
{
intn i;
size_t nbytes;
FUNC_ENTER (H5F_arr_write, FAIL);
/* Check args */
assert (f);
assert (layout);
assert (offset);
assert (size);
assert (buf);
switch (layout->type) {
case H5D_CONTIGUOUS:
/*
* We currently only support complete I/O.
*/
for (i=0; i<layout->ndims; i++) {
assert (0==offset[i]);
assert (size[i]==layout->dim[i]);
}
for (i=0, nbytes=1; i<layout->ndims; i++) nbytes *= layout->dim[i];
if (H5F_block_write (f, &(layout->addr), nbytes, buf)<0) {
HRETURN_ERROR (H5E_IO, H5E_WRITEERROR, FAIL, "block write failed");
}
break;
case H5D_CHUNKED:
if (H5F_istore_write (f, layout, offset, size, buf)<0) {
HRETURN_ERROR (H5E_IO, H5E_WRITEERROR, FAIL, "chunked write failed");
}
break;
default:
assert ("not implemented yet" && 0);
HRETURN_ERROR (H5E_IO, H5E_UNSUPPORTED, FAIL,
"unsupported storage layout");
break;
}
FUNC_LEAVE (SUCCEED);
}
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