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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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