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/*
* Copyright (C) 1998 NCSA
* All rights reserved.
*
* Programmer: Quincey Koziol <koziol@ncsa.uiuc.edu>
* Tuesday, June 16, 1998
*
* Purpose: "All" selection data space I/O functions.
*/
#include <H5private.h>
#include <H5Eprivate.h>
#include <H5Sprivate.h>
#include <H5Vprivate.h>
#include <H5Dprivate.h>
/* Interface initialization */
#define PABLO_MASK H5Sall_mask
#define INTERFACE_INIT NULL
static intn interface_initialize_g = 0;
static herr_t H5S_all_init (const struct H5O_layout_t *layout,
const H5S_t *space, H5S_sel_iter_t *iter);
static size_t H5S_all_favail (const H5S_t *space, const H5S_sel_iter_t *iter,
size_t max);
static size_t H5S_all_fgath (H5F_t *f, const struct H5O_layout_t *layout,
const struct H5O_pline_t *pline,
const struct H5O_fill_t *fill,
const struct H5O_efl_t *efl, size_t elmt_size,
const H5S_t *file_space,
H5S_sel_iter_t *file_iter, size_t nelmts,
const H5D_xfer_t *xfer_parms, void *buf/*out*/);
static herr_t H5S_all_fscat (H5F_t *f, const struct H5O_layout_t *layout,
const struct H5O_pline_t *pline,
const struct H5O_fill_t *fill,
const struct H5O_efl_t *efl, size_t elmt_size,
const H5S_t *file_space,
H5S_sel_iter_t *file_iter, size_t nelmts,
const H5D_xfer_t *xfer_parms, const void *buf);
static size_t H5S_all_mgath (const void *_buf, size_t elmt_size,
const H5S_t *mem_space, H5S_sel_iter_t *mem_iter,
size_t nelmts, void *_tconv_buf/*out*/);
static herr_t H5S_all_mscat (const void *_tconv_buf, size_t elmt_size,
const H5S_t *mem_space, H5S_sel_iter_t *mem_iter,
size_t nelmts, void *_buf/*out*/);
const H5S_fconv_t H5S_ALL_FCONV[1] = {{
"all", /*name */
H5S_SEL_ALL, /*selection type */
H5S_all_init, /*initialize */
H5S_all_favail, /*available */
H5S_all_fgath, /*gather */
H5S_all_fscat, /*scatter */
}};
const H5S_mconv_t H5S_ALL_MCONV[1] = {{
"all", /*name */
H5S_SEL_ALL, /*selection type */
H5S_all_init, /*initialize */
H5S_all_mgath, /*gather */
H5S_all_mscat, /*scatter */
}};
/*-------------------------------------------------------------------------
* Function: H5S_all_init
*
* Purpose: Initializes iteration information for all selection.
*
* Return: non-negative on success, negative on failure.
*
* Programmer: Quincey Koziol
* Tuesday, June 16, 1998
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5S_all_init (const struct H5O_layout_t __unused__ *layout,
const H5S_t *space, H5S_sel_iter_t *sel_iter)
{
FUNC_ENTER (H5S_all_init, FAIL);
/* Check args */
assert (layout);
assert (space && H5S_SEL_ALL==space->select.type);
assert (sel_iter);
/* Initialize the number of elements to iterate over */
sel_iter->all.elmt_left=H5S_get_simple_extent_npoints(space);
/* Start at the upper left location */
sel_iter->all.offset=0;
FUNC_LEAVE (SUCCEED);
}
/*-------------------------------------------------------------------------
* Function: H5S_all_favail
*
* Purpose: Figure out the optimal number of elements to transfer to/from
* the file.
*
* Return: non-negative number of elements on success, negative on
* failure.
*
* Programmer: Quincey Koziol
* Tuesday, June 16, 1998
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static size_t
H5S_all_favail (const H5S_t *space, const H5S_sel_iter_t *sel_iter, size_t max)
{
hsize_t nelmts;
int m_ndims; /* file dimensionality */
hsize_t size[H5O_LAYOUT_NDIMS]; /*size of selected hyperslab */
hsize_t acc;
int i;
FUNC_ENTER (H5S_all_favail, FAIL);
/* Check args */
assert (space && H5S_SEL_ALL==space->select.type);
assert (sel_iter);
/*
* The stripmine size is such that only the slowest varying dimension can
* be split up. We choose the largest possible strip mine size which is
* not larger than the desired size.
*/
m_ndims = H5S_get_simple_extent_dims (space, size, NULL);
for (i=m_ndims-1, acc=1; i>0; --i)
acc *= size[i];
nelmts = (max/acc) * acc;
if (nelmts<=0) {
HRETURN_ERROR (H5E_IO, H5E_UNSUPPORTED, FAIL,
"strip mine buffer is too small");
}
FUNC_LEAVE (MIN(sel_iter->all.elmt_left,nelmts));
} /* H5S_all_favail() */
/*-------------------------------------------------------------------------
* Function: H5S_all_fgath
*
* Purpose: Gathers data points from file F and accumulates them in the
* type conversion buffer BUF. The LAYOUT argument describes
* how the data is stored on disk and EFL describes how the data
* is organized in external files. ELMT_SIZE is the size in
* bytes of a datum which this function treats as opaque.
* FILE_SPACE describes the data space of the dataset on disk
* and the elements that have been selected for reading (via
* hyperslab, etc). This function will copy at most NELMTS
* elements.
*
* Return: Success: Number of elements copied.
*
* Failure: 0
*
* Programmer: Quincey Koziol
* Tuesday, June 16, 1998
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static size_t
H5S_all_fgath (H5F_t *f, const struct H5O_layout_t *layout,
const struct H5O_pline_t *pline,
const struct H5O_fill_t *fill, const struct H5O_efl_t *efl,
size_t elmt_size, const H5S_t *file_space,
H5S_sel_iter_t *file_iter, size_t nelmts,
const H5D_xfer_t *xfer_parms, void *_buf/*out*/)
{
hssize_t file_offset[H5O_LAYOUT_NDIMS]; /*offset of slab in file*/
hsize_t hsize[H5O_LAYOUT_NDIMS]; /*size of hyperslab */
hssize_t zero[H5O_LAYOUT_NDIMS]; /*zero */
uint8_t *buf=(uint8_t*)_buf; /*for pointer arithmetic*/
hsize_t acc; /*accumulator */
intn space_ndims; /*dimensionality of space*/
intn i; /*counters */
FUNC_ENTER (H5S_all_fgath, 0);
/* Check args */
assert (f);
assert (layout);
assert (elmt_size>0);
assert (file_space);
assert (file_iter);
assert (nelmts>0);
assert (buf);
/*
* Get hyperslab information to determine what elements are being
* selected (there might eventually be other selection methods too).
* We only support hyperslabs with unit sample because there's no way to
* currently pass sample information into H5F_arr_read() much less
* H5F_istore_read().
*/
if ((space_ndims=H5S_get_simple_extent_dims (file_space, hsize, NULL))<0) {
HRETURN_ERROR (H5E_DATASPACE, H5E_CANTINIT, 0,
"unable to retrieve hyperslab parameters");
}
if(space_ndims>0) {
HDmemset(file_offset,0,sizeof(hssize_t)*space_ndims);
/* Adjust the slowest varying dimension to take care of strip mining */
for (i=1, acc=1; i<space_ndims; i++)
acc *= hsize[i];
assert (0==file_iter->all.offset % acc);
assert (0==nelmts % acc);
file_offset[0] += file_iter->all.offset / acc;
hsize[0] = nelmts / acc;
} /* end if */
/* The fastest varying dimension is for the data point itself */
file_offset[space_ndims] = 0;
hsize[space_ndims] = elmt_size;
HDmemset (zero, 0, (space_ndims+1)*sizeof(*zero));
/*
* Gather from file.
*/
if (H5F_arr_read (f, xfer_parms, layout, pline, fill, efl, hsize, hsize,
zero, file_offset, buf/*out*/)<0) {
HRETURN_ERROR (H5E_DATASPACE, H5E_READERROR, 0, "read error");
}
/* Advance iterator */
file_iter->all.elmt_left--;
file_iter->all.offset+=nelmts;
FUNC_LEAVE (nelmts);
} /* H5S_all_fgath() */
/*-------------------------------------------------------------------------
* Function: H5S_all_fscat
*
* Purpose: Scatters dataset elements from the type conversion buffer BUF
* to the file F where the data points are arranged according to
* the file data space FILE_SPACE and stored according to
* LAYOUT and EFL. Each element is ELMT_SIZE bytes.
* The caller is requesting that NELMTS elements are copied.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* Tuesday, June 16, 1998
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5S_all_fscat (H5F_t *f, const struct H5O_layout_t *layout,
const struct H5O_pline_t *pline, const struct H5O_fill_t *fill,
const struct H5O_efl_t *efl, size_t elmt_size,
const H5S_t *file_space, H5S_sel_iter_t *file_iter,
size_t nelmts, const H5D_xfer_t *xfer_parms, const void *_buf)
{
hssize_t file_offset[H5O_LAYOUT_NDIMS]; /*offset of hyperslab */
hsize_t hsize[H5O_LAYOUT_NDIMS]; /*size of hyperslab */
hssize_t zero[H5O_LAYOUT_NDIMS]; /*zero vector */
const uint8_t *buf=(const uint8_t*)_buf; /*for pointer arithmetic*/
hsize_t acc; /*accumulator */
intn space_ndims; /*space dimensionality */
intn i; /*counters */
FUNC_ENTER (H5S_all_fscat, FAIL);
/* Check args */
assert (f);
assert (layout);
assert (elmt_size>0);
assert (file_space);
assert (file_iter);
assert (nelmts>0);
assert (buf);
/*
* Get information to determine what elements are being selected.
*/
if ((space_ndims=H5S_get_simple_extent_dims (file_space, hsize, NULL))<0) {
HRETURN_ERROR (H5E_DATASPACE, H5E_CANTINIT, FAIL,
"unable to retrieve hyperslab parameters");
}
if(space_ndims>0) {
HDmemset(file_offset,0,sizeof(hssize_t)*space_ndims);
/* Adjust the slowest varying dimension to account for strip mining */
for (i=1, acc=1; i<space_ndims; i++)
acc *= hsize[i];
assert (0==file_iter->all.offset % acc);
assert (0==nelmts % acc);
file_offset[0] += file_iter->all.offset / acc;
hsize[0] = nelmts / acc;
} /* end if */
/* The fastest varying dimension is for the data point itself */
file_offset[space_ndims] = 0;
hsize[space_ndims] = elmt_size;
HDmemset (zero, 0, (space_ndims+1)*sizeof(*zero));
/*
* Scatter to file.
*/
if (H5F_arr_write (f, xfer_parms, layout, pline, fill, efl, hsize, hsize,
zero, file_offset, buf)<0) {
HRETURN_ERROR (H5E_DATASPACE, H5E_WRITEERROR, FAIL, "write error");
}
/* Advance iterator */
file_iter->all.elmt_left--;
file_iter->all.offset+=nelmts;
FUNC_LEAVE (SUCCEED);
} /* H5S_all_fscat() */
/*-------------------------------------------------------------------------
* Function: H5S_all_mgath
*
* Purpose: Gathers dataset elements from application memory BUF and
* copies them into the data type conversion buffer TCONV_BUF.
* Each element is ELMT_SIZE bytes and arranged in application
* memory according to MEM_SPACE.
* The caller is requesting that at most NELMTS be gathered.
*
* Return: Success: Number of elements copied.
*
* Failure: 0
*
* Programmer: Quincey Koziol
* Tuesday, June 16, 1998
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static size_t
H5S_all_mgath (const void *_buf, size_t elmt_size,
const H5S_t *mem_space, H5S_sel_iter_t *mem_iter,
size_t nelmts, void *_tconv_buf/*out*/)
{
hssize_t mem_offset[H5O_LAYOUT_NDIMS]; /*slab offset in app buf*/
hsize_t mem_size[H5O_LAYOUT_NDIMS]; /*total size of app buf */
hsize_t hsize[H5O_LAYOUT_NDIMS]; /*size of hyperslab */
hssize_t zero[H5O_LAYOUT_NDIMS]; /*zero */
const uint8_t *buf=(const uint8_t*)_buf; /* Get local copies for address arithmetic */
uint8_t *tconv_buf=(uint8_t*)_tconv_buf;
hsize_t acc; /*accumulator */
intn space_ndims; /*dimensionality of space*/
intn i; /*counters */
FUNC_ENTER (H5S_all_mgath, 0);
/* Check args */
assert (buf);
assert (elmt_size>0);
assert (mem_space && H5S_SEL_ALL==mem_space->select.type);
assert (mem_iter);
assert (nelmts>0);
assert (tconv_buf);
/*
* Retrieve information to determine what elements are being selected.
*/
if ((space_ndims=H5S_get_simple_extent_dims (mem_space, hsize, NULL))<0) {
HRETURN_ERROR (H5E_DATASPACE, H5E_CANTINIT, 0,
"unable to retrieve hyperslab parameters");
}
if(space_ndims>0) {
HDmemset(mem_offset,0,sizeof(hssize_t)*space_ndims);
if (H5S_get_simple_extent_dims (mem_space, mem_size, NULL)<0) {
HRETURN_ERROR (H5E_DATASPACE, H5E_CANTINIT, 0,
"unable to retrieve data space dimensions");
}
/* Adjust the slowest varying dimension to account for strip mining */
for (i=1, acc=1; i<space_ndims; i++)
acc *= hsize[i];
assert (0==mem_iter->all.offset % acc);
assert (0==nelmts % acc);
mem_offset[0] += mem_iter->all.offset / acc;
hsize[0] = nelmts / acc;
} /* end if */
/* The fastest varying dimension is for the data point itself */
mem_offset[space_ndims] = 0;
mem_size[space_ndims] = elmt_size;
hsize[space_ndims] = elmt_size;
HDmemset (zero, 0, (space_ndims+1)*sizeof(*zero));
/*
* Scatter from conversion buffer to application memory.
*/
if (H5V_hyper_copy (space_ndims+1, hsize, hsize, zero, tconv_buf,
mem_size, mem_offset, buf)<0) {
HRETURN_ERROR (H5E_DATASPACE, H5E_CANTINIT, 0,
"unable to scatter data to memory");
}
/* Advance iterator */
mem_iter->all.elmt_left--;
mem_iter->all.offset+=nelmts;
FUNC_LEAVE (nelmts);
} /* H5S_all_mgath() */
/*-------------------------------------------------------------------------
* Function: H5S_all_mscat
*
* Purpose: Scatters NELMTS data points from the type conversion buffer
* TCONV_BUF to the application buffer BUF. Each element is
* ELMT_SIZE bytes and they are organized in application memory
* according to MEM_SPACE.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* Wednesday, June 17, 1998
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5S_all_mscat (const void *_tconv_buf, size_t elmt_size,
const H5S_t *mem_space, H5S_sel_iter_t *mem_iter,
size_t nelmts, void *_buf/*out*/)
{
hssize_t mem_offset[H5O_LAYOUT_NDIMS]; /*slab offset in app buf*/
hsize_t mem_size[H5O_LAYOUT_NDIMS]; /*total size of app buf */
hsize_t hsize[H5O_LAYOUT_NDIMS]; /*size of hyperslab */
hssize_t zero[H5O_LAYOUT_NDIMS]; /*zero */
uint8_t *buf=(uint8_t*)_buf; /* Get local copies for address arithmetic */
const uint8_t *tconv_buf=(const uint8_t *)_tconv_buf;
hsize_t acc; /*accumulator */
intn space_ndims; /*dimensionality of space*/
intn i; /*counters */
FUNC_ENTER (H5S_all_mscat, FAIL);
/* Check args */
assert (tconv_buf);
assert (elmt_size>0);
assert (mem_space && H5S_SEL_ALL==mem_space->select.type);
assert (mem_iter);
assert (nelmts>0);
assert (buf);
/*
* Retrieve information to determine what elements are being selected.
*/
if ((space_ndims=H5S_get_simple_extent_dims (mem_space, hsize, NULL))<0) {
HRETURN_ERROR (H5E_DATASPACE, H5E_CANTINIT, FAIL,
"unable to retrieve hyperslab parameters");
}
if(space_ndims>0) {
HDmemset(mem_offset,0,sizeof(hssize_t)*space_ndims);
if (H5S_get_simple_extent_dims (mem_space, mem_size, NULL)<0) {
HRETURN_ERROR (H5E_DATASPACE, H5E_CANTINIT, FAIL,
"unable to retrieve data space dimensions");
}
/* Adjust the slowest varying dimension to take care of strip mining */
for (i=1, acc=1; i<space_ndims; i++)
acc *= hsize[i];
assert (0==mem_iter->all.offset % acc);
assert (0==nelmts % acc);
mem_offset[0] += mem_iter->all.offset / acc;
hsize[0] = nelmts / acc;
} /* end if */
/* The fastest varying dimension is for the data point itself */
mem_offset[space_ndims] = 0;
mem_size[space_ndims] = elmt_size;
hsize[space_ndims] = elmt_size;
HDmemset (zero, 0, (space_ndims+1)*sizeof(*zero));
/*
* Scatter from conversion buffer to application memory.
*/
if (H5V_hyper_copy (space_ndims+1, hsize, mem_size, mem_offset, buf,
hsize, zero, tconv_buf)<0) {
HRETURN_ERROR (H5E_DATASPACE, H5E_CANTINIT, FAIL,
"unable to scatter data to memory");
}
/* Advance iterator */
mem_iter->all.elmt_left--;
mem_iter->all.offset+=nelmts;
FUNC_LEAVE (SUCCEED);
} /* H5S_all_mscat() */
/*--------------------------------------------------------------------------
NAME
H5S_all_release
PURPOSE
Release all selection information for a dataspace
USAGE
herr_t H5S_all_release(space)
H5S_t *space; IN: Pointer to dataspace
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
Releases "all" selection information for a dataspace
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
herr_t
H5S_all_release (H5S_t __unused__ *space)
{
FUNC_ENTER (H5S_all_release, FAIL);
/* Check args */
assert (space);
FUNC_LEAVE (SUCCEED);
} /* H5S_all_release() */
/*--------------------------------------------------------------------------
NAME
H5S_all_npoints
PURPOSE
Compute number of elements in current selection
USAGE
hsize_t H5S_all_npoints(space)
H5S_t *space; IN: Pointer to dataspace
RETURNS
The number of elements in selection on success, 0 on failure
DESCRIPTION
Compute number of elements in current selection. For "all" selections,
this is the same as the number of points in the extent.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
hsize_t
H5S_all_npoints (const H5S_t *space)
{
intn i; /* Counters */
hsize_t ret_value;
FUNC_ENTER (H5S_all_npoints, 0);
/* Check args */
assert (space);
for(i=0, ret_value=1; i<space->extent.u.simple.rank; i++)
ret_value*=space->extent.u.simple.size[i];
FUNC_LEAVE (ret_value);
} /* H5S_all_npoints() */
/*--------------------------------------------------------------------------
NAME
H5S_all_select_serialize
PURPOSE
Serialize the current selection into a user-provided buffer.
USAGE
herr_t H5S_all_select_serialize(space, buf)
H5S_t *space; IN: Dataspace pointer of selection to serialize
uint8 *buf; OUT: Buffer to put serialized selection into
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
Serializes the current element selection into a buffer. (Primarily for
storing on disk).
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
herr_t
H5S_all_select_serialize (const H5S_t *space, uint8_t *buf)
{
herr_t ret_value=FAIL; /* return value */
FUNC_ENTER (H5S_all_select_serialize, FAIL);
assert(space);
/* Store the preamble information */
UINT32ENCODE(buf, (uint32_t)space->select.type); /* Store the type of selection */
UINT32ENCODE(buf, (uint32_t)1); /* Store the version number */
UINT32ENCODE(buf, (uint32_t)0); /* Store the un-used padding */
UINT32ENCODE(buf, (uint32_t)0); /* Store the additional information length */
/* Set success */
ret_value=SUCCEED;
FUNC_LEAVE (ret_value);
} /* H5S_all_select_serialize() */
/*--------------------------------------------------------------------------
NAME
H5S_all_select_deserialize
PURPOSE
Deserialize the current selection from a user-provided buffer.
USAGE
herr_t H5S_all_select_deserialize(space, buf)
H5S_t *space; IN/OUT: Dataspace pointer to place selection into
uint8 *buf; IN: Buffer to retrieve serialized selection from
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
Deserializes the current selection into a buffer. (Primarily for retrieving
from disk).
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
herr_t
H5S_all_select_deserialize (H5S_t *space, const uint8_t __unused__ *buf)
{
herr_t ret_value=FAIL; /* return value */
FUNC_ENTER (H5S_all_select_deserialize, FAIL);
assert(space);
/* Change to "all" selection */
if((ret_value=H5S_select_all(space))<0) {
HGOTO_ERROR(H5E_DATASPACE, H5E_CANTDELETE, FAIL, "can't change selection");
} /* end if */
done:
FUNC_LEAVE (ret_value);
} /* H5S_all_select_deserialize() */
/*--------------------------------------------------------------------------
NAME
H5S_all_bounds
PURPOSE
Gets the bounding box containing the selection.
USAGE
herr_t H5S_all_bounds(space, hsize_t *start, hsize_t *end)
H5S_t *space; IN: Dataspace pointer of selection to query
hsize_t *start; OUT: Starting coordinate of bounding box
hsize_t *end; OUT: Opposite coordinate of bounding box
RETURNS
Non-negative on success, negative on failure
DESCRIPTION
Retrieves the bounding box containing the current selection and places
it into the user's buffers. The start and end buffers must be large
enough to hold the dataspace rank number of coordinates. The bounding box
exactly contains the selection, ie. if a 2-D element selection is currently
defined with the following points: (4,5), (6,8) (10,7), the bounding box
with be (4, 5), (10, 8). Calling this function on a "none" selection
returns fail.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
herr_t
H5S_all_bounds(H5S_t *space, hsize_t *start, hsize_t *end)
{
intn rank; /* Dataspace rank */
intn i; /* index variable */
herr_t ret_value=SUCCEED; /* return value */
FUNC_ENTER (H5S_all_bounds, FAIL);
assert(space);
assert(start);
assert(end);
/* Get the dataspace extent rank */
rank=space->extent.u.simple.rank;
/* Just copy over the complete extent */
for(i=0; i<rank; i++) {
start[i]=0;
end[i]=space->extent.u.simple.size[i]-1;
} /* end for */
FUNC_LEAVE (ret_value);
} /* H5Sget_all_bounds() */
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