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H5TB.c
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3391 lines (2845 loc) · 102 KB
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* 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 LICENSE file, which can be found at the root of the source code *
* distribution tree, or in https://www.hdfgroup.org/licenses. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#include "H5LTprivate.h"
#include "H5TBprivate.h"
/*-------------------------------------------------------------------------
*
* internal functions
*
*-------------------------------------------------------------------------
*/
static bool H5TB_find_field(const char *field, const char *field_list);
static herr_t H5TB_attach_attributes(const char *table_title, hid_t loc_id, const char *dset_name,
hsize_t nfields, hid_t tid);
static hid_t H5TB_create_type(hid_t loc_id, const char *dset_name, size_t type_size,
const size_t *field_offset, const size_t *field_sizes, hid_t ftype_id);
/*-------------------------------------------------------------------------
*
* Create functions
*
*-------------------------------------------------------------------------
*/
/*-------------------------------------------------------------------------
* Function: H5TBmake_table
*
* Purpose: Make a table
*
* Return: Success: 0, Failure: -1
*-------------------------------------------------------------------------
*/
herr_t
H5TBmake_table(const char *table_title, hid_t loc_id, const char *dset_name, hsize_t nfields,
hsize_t nrecords, size_t type_size, const char *field_names[], const size_t *field_offset,
const hid_t *field_types, hsize_t chunk_size, void *fill_data, int compress, const void *buf)
{
hid_t did = H5I_INVALID_HID;
hid_t sid = H5I_INVALID_HID;
hid_t mem_type_id = H5I_INVALID_HID;
hid_t plist_id = H5I_INVALID_HID;
hid_t attr_id = H5I_INVALID_HID;
hsize_t dims[1];
hsize_t dims_chunk[1];
hsize_t maxdims[1] = {H5S_UNLIMITED};
char attr_name[255];
char *member_name = NULL;
unsigned char *tmp_buf = NULL;
hsize_t i;
herr_t ret_val = -1;
/* check the arguments */
if (table_title == NULL) {
goto out;
}
if (dset_name == NULL) {
goto out;
}
if (field_names == NULL) {
goto out;
}
dims[0] = nrecords;
dims_chunk[0] = chunk_size;
/* create the memory data type. */
if ((mem_type_id = H5Tcreate(H5T_COMPOUND, type_size)) < 0)
goto out;
/* insert fields. */
for (i = 0; i < nfields; i++)
if (H5Tinsert(mem_type_id, field_names[i], field_offset[i], field_types[i]) < 0)
goto out;
/* create a simple data space with unlimited size */
if ((sid = H5Screate_simple(1, dims, maxdims)) < 0)
goto out;
/* modify dataset creation properties, i.e. enable chunking */
if ((plist_id = H5Pcreate(H5P_DATASET_CREATE)) < 0)
goto out;
if (H5Pset_chunk(plist_id, 1, dims_chunk) < 0)
goto out;
/* set the fill value using a struct as the data type. */
if (fill_data)
if (H5Pset_fill_value(plist_id, mem_type_id, fill_data) < 0)
goto out;
/*
dataset creation property list is modified to use
GZIP compression with the compression effort set to 6.
*/
if (compress)
if (H5Pset_deflate(plist_id, 6) < 0)
goto out;
/* create the dataset. */
if ((did = H5Dcreate2(loc_id, dset_name, mem_type_id, sid, H5P_DEFAULT, plist_id, H5P_DEFAULT)) < 0)
goto out;
/* only write if there is something to write */
if (buf)
if (H5Dwrite(did, mem_type_id, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf) < 0)
goto out;
/* terminate access to the data space. */
if (H5Sclose(sid) < 0)
goto out;
sid = H5I_INVALID_HID;
/* end access to the dataset */
if (H5Dclose(did) < 0)
goto out;
did = H5I_INVALID_HID;
/* end access to the property list */
if (H5Pclose(plist_id) < 0)
goto out;
plist_id = H5I_INVALID_HID;
/*-------------------------------------------------------------------------
* set the conforming table attributes
*-------------------------------------------------------------------------
*/
/* attach the CLASS attribute */
if (H5LTset_attribute_string(loc_id, dset_name, "CLASS", TABLE_CLASS) < 0)
goto out;
/* attach the VERSION attribute */
if (H5LTset_attribute_string(loc_id, dset_name, "VERSION", TABLE_VERSION) < 0)
goto out;
/* attach the TITLE attribute */
if (H5LTset_attribute_string(loc_id, dset_name, "TITLE", table_title) < 0)
goto out;
/* attach the FIELD_ name attribute */
for (i = 0; i < nfields; i++) {
/* get the member name */
if (NULL == (member_name = H5Tget_member_name(mem_type_id, (unsigned)i)))
goto out;
snprintf(attr_name, sizeof(attr_name), "FIELD_%d_NAME", (int)i);
/* attach the attribute */
if (H5LTset_attribute_string(loc_id, dset_name, attr_name, member_name) < 0)
goto out;
H5free_memory(member_name);
member_name = NULL;
} /* end for */
/* attach the FIELD_ fill value attribute */
if (fill_data) {
tmp_buf = (unsigned char *)fill_data;
/* open the dataset. */
if ((did = H5Dopen2(loc_id, dset_name, H5P_DEFAULT)) < 0)
goto out;
if ((sid = H5Screate(H5S_SCALAR)) < 0)
goto out;
for (i = 0; i < nfields; i++) {
snprintf(attr_name, sizeof(attr_name), "FIELD_%d_FILL", (int)i);
if ((attr_id = H5Acreate2(did, attr_name, field_types[i], sid, H5P_DEFAULT, H5P_DEFAULT)) < 0)
goto out;
if (H5Awrite(attr_id, field_types[i], tmp_buf + field_offset[i]) < 0)
goto out;
if (H5Aclose(attr_id) < 0)
goto out;
attr_id = H5I_INVALID_HID;
} /* end for */
/* terminate access to the data space. */
if (H5Sclose(sid) < 0)
goto out;
sid = H5I_INVALID_HID;
/* end access to the dataset */
if (H5Dclose(did) < 0)
goto out;
did = H5I_INVALID_HID;
} /* end if */
/* release the datatype. */
if (H5Tclose(mem_type_id) < 0)
goto out;
mem_type_id = H5I_INVALID_HID;
ret_val = 0;
out:
if (member_name)
H5free_memory(member_name);
if (attr_id > 0)
if (H5Aclose(attr_id) < 0)
ret_val = -1;
if (plist_id > 0)
if (H5Pclose(plist_id) < 0)
ret_val = -1;
if (sid > 0)
if (H5Sclose(sid) < 0)
ret_val = -1;
if (did > 0)
if (H5Dclose(did) < 0)
ret_val = -1;
if (mem_type_id > 0)
if (H5Tclose(mem_type_id) < 0)
ret_val = -1;
return ret_val;
} /* end H5TBmake_table() */
/*-------------------------------------------------------------------------
*
* Write functions
*
*-------------------------------------------------------------------------
*/
/*-------------------------------------------------------------------------
* Function: H5TBappend_records
*
* Purpose: Appends records to a table
*
* Return: Success: 0, Failure: -1
*
* Comments: Uses memory offsets
*
*-------------------------------------------------------------------------
*/
herr_t
H5TBappend_records(hid_t loc_id, const char *dset_name, hsize_t nrecords, size_t type_size,
const size_t *field_offset, const size_t *field_sizes, const void *buf)
{
hid_t did = H5I_INVALID_HID;
hid_t tid = H5I_INVALID_HID;
hid_t mem_type_id = H5I_INVALID_HID;
hsize_t nrecords_orig;
hsize_t nfields;
herr_t ret_val = -1;
/* check the arguments */
if (dset_name == NULL)
goto out;
/* get the original number of records and fields */
if (H5TBget_table_info(loc_id, dset_name, &nfields, &nrecords_orig) < 0)
goto out;
/* open the dataset. */
if ((did = H5Dopen2(loc_id, dset_name, H5P_DEFAULT)) < 0)
goto out;
/* get the datatypes */
if ((tid = H5Dget_type(did)) < 0)
goto out;
if ((mem_type_id = H5TB_create_type(loc_id, dset_name, type_size, field_offset, field_sizes, tid)) < 0)
goto out;
/* append the records */
if ((H5TB_common_append_records(did, mem_type_id, (size_t)nrecords, nrecords_orig, buf)) < 0)
goto out;
ret_val = 0;
out:
if (tid > 0)
if (H5Tclose(tid) < 0)
ret_val = -1;
if (mem_type_id > 0)
if (H5Tclose(mem_type_id) < 0)
ret_val = -1;
if (did > 0)
if (H5Dclose(did) < 0)
ret_val = -1;
return ret_val;
} /* end H5TBappend_records() */
/*-------------------------------------------------------------------------
* Function: H5TBwrite_records
*
* Purpose: Writes records
*
* Return: Success: 0, Failure: -1
*
* Comments: Uses memory offsets
*
*-------------------------------------------------------------------------
*/
herr_t
H5TBwrite_records(hid_t loc_id, const char *dset_name, hsize_t start, hsize_t nrecords, size_t type_size,
const size_t *field_offset, const size_t *field_sizes, const void *buf)
{
hid_t did = H5I_INVALID_HID;
hid_t tid = H5I_INVALID_HID;
hid_t sid = H5I_INVALID_HID;
hid_t m_sid = H5I_INVALID_HID;
hid_t mem_type_id = H5I_INVALID_HID;
hsize_t count[1];
hsize_t offset[1];
hsize_t mem_size[1];
hsize_t dims[1];
herr_t ret_val = -1;
/* check the arguments */
if (dset_name == NULL)
goto out;
/* open the dataset. */
if ((did = H5Dopen2(loc_id, dset_name, H5P_DEFAULT)) < 0)
goto out;
/* get the datatype */
if ((tid = H5Dget_type(did)) < 0)
goto out;
if ((mem_type_id = H5TB_create_type(loc_id, dset_name, type_size, field_offset, field_sizes, tid)) < 0)
goto out;
/* get the dataspace handle */
if ((sid = H5Dget_space(did)) < 0)
goto out;
/* get records */
if (H5Sget_simple_extent_dims(sid, dims, NULL) < 0)
goto out;
if (start + nrecords > dims[0])
goto out;
/* define a hyperslab in the dataset of the size of the records */
offset[0] = start;
count[0] = nrecords;
if (H5Sselect_hyperslab(sid, H5S_SELECT_SET, offset, NULL, count, NULL) < 0)
goto out;
/* create a memory dataspace handle */
mem_size[0] = count[0];
if ((m_sid = H5Screate_simple(1, mem_size, NULL)) < 0)
goto out;
if (H5Dwrite(did, mem_type_id, m_sid, sid, H5P_DEFAULT, buf) < 0)
goto out;
ret_val = 0;
out:
if (m_sid > 0)
if (H5Sclose(m_sid) < 0)
ret_val = -1;
if (sid > 0)
if (H5Sclose(sid) < 0)
ret_val = -1;
if (tid > 0)
if (H5Tclose(tid) < 0)
ret_val = -1;
if (mem_type_id > 0)
if (H5Tclose(mem_type_id) < 0)
ret_val = -1;
if (did > 0)
if (H5Dclose(did) < 0)
ret_val = -1;
return ret_val;
} /* end H5TBwrite_records() */
/*-------------------------------------------------------------------------
* Function: H5TBwrite_fields_name
*
* Purpose: Writes fields
*
* Return: Success: 0, Failure: -1
*
* Comments:
*
*-------------------------------------------------------------------------
*/
herr_t
H5TBwrite_fields_name(hid_t loc_id, const char *dset_name, const char *field_names, hsize_t start,
hsize_t nrecords, size_t type_size, const size_t *field_offset,
const size_t *field_sizes, const void *buf)
{
hid_t did = H5I_INVALID_HID;
hid_t tid = H5I_INVALID_HID;
hid_t write_type_id = H5I_INVALID_HID;
hid_t member_type_id = H5I_INVALID_HID;
hid_t nmtype_id = H5I_INVALID_HID;
hid_t m_sid = H5I_INVALID_HID;
hid_t file_space_id = H5I_INVALID_HID;
hid_t preserve_id = H5I_INVALID_HID;
hssize_t nfields;
hssize_t i, j;
hsize_t count[1];
hsize_t offset[1];
char *member_name = NULL;
size_t size_native;
herr_t ret_val = -1;
/* check the arguments */
if (dset_name == NULL)
goto out;
if (field_names == NULL)
goto out;
/* create xfer properties to preserve initialized data */
if ((preserve_id = H5Pcreate(H5P_DATASET_XFER)) < 0)
goto out;
if (H5Pset_preserve(preserve_id, 1) < 0)
goto out;
/* open the dataset. */
if ((did = H5Dopen2(loc_id, dset_name, H5P_DEFAULT)) < 0)
goto out;
/* get the datatype */
if ((tid = H5Dget_type(did)) < 0)
goto out;
/* get the number of fields */
if ((nfields = H5Tget_nmembers(tid)) < 0)
goto out;
/* create a write id */
if ((write_type_id = H5Tcreate(H5T_COMPOUND, type_size)) < 0)
goto out;
j = 0;
/* iterate though the members */
for (i = 0; i < nfields; i++) {
/* get the member name */
if (NULL == (member_name = H5Tget_member_name(tid, (unsigned)i)))
goto out;
if (H5TB_find_field(member_name, field_names)) {
/* get the member type */
if ((member_type_id = H5Tget_member_type(tid, (unsigned)i)) < 0)
goto out;
/* convert to native type */
if ((nmtype_id = H5Tget_native_type(member_type_id, H5T_DIR_DEFAULT)) < 0)
goto out;
if (0 == (size_native = H5Tget_size(nmtype_id)))
goto out;
/* adjust, if necessary */
if (field_sizes[j] != size_native)
if (H5Tset_size(nmtype_id, field_sizes[j]) < 0)
goto out;
/* the field in the file is found by its name */
if (field_offset) {
if (H5Tinsert(write_type_id, member_name, field_offset[j], nmtype_id) < 0)
goto out;
} /* end if */
/* only one field */
else {
if (H5Tinsert(write_type_id, member_name, (size_t)0, nmtype_id) < 0)
goto out;
} /* end else */
j++;
/* close */
if (H5Tclose(member_type_id) < 0)
goto out;
member_type_id = H5I_INVALID_HID;
if (H5Tclose(nmtype_id) < 0)
goto out;
nmtype_id = H5I_INVALID_HID;
} /* end if */
H5free_memory(member_name);
member_name = NULL;
} /* end for */
/* get the dataspace handle */
if ((file_space_id = H5Dget_space(did)) < 0)
goto out;
if ((m_sid = H5Screate_simple(1, &nrecords, NULL)) < 0)
goto out;
/* define a hyperslab in the dataset */
offset[0] = start;
count[0] = nrecords;
if (H5Sselect_hyperslab(file_space_id, H5S_SELECT_SET, offset, NULL, count, NULL) < 0)
goto out;
/* write */
if (H5Dwrite(did, write_type_id, m_sid, file_space_id, preserve_id, buf) < 0)
goto out;
ret_val = 0;
out:
if (member_name)
H5free_memory(member_name);
if (preserve_id > 0)
if (H5Pclose(preserve_id) < 0)
ret_val = -1;
if (write_type_id > 0)
if (H5Tclose(write_type_id) < 0)
ret_val = -1;
if (tid > 0)
if (H5Tclose(tid) < 0)
ret_val = -1;
if (file_space_id > 0)
if (H5Sclose(file_space_id) < 0)
ret_val = -1;
if (m_sid > 0)
if (H5Sclose(m_sid) < 0)
ret_val = -1;
if (did > 0)
if (H5Dclose(did) < 0)
ret_val = -1;
return ret_val;
} /* end H5TBwrite_fields_name() */
/*-------------------------------------------------------------------------
* Function: H5TBwrite_fields_index
*
* Purpose: Writes fields
*
* Return: Success: 0, Failure: -1
*
* Comments: Uses memory offsets
*
*-------------------------------------------------------------------------
*/
herr_t
H5TBwrite_fields_index(hid_t loc_id, const char *dset_name, hsize_t nfields, const int *field_index,
hsize_t start, hsize_t nrecords, size_t type_size, const size_t *field_offset,
const size_t *field_sizes, const void *buf)
{
hid_t did = H5I_INVALID_HID;
hid_t tid = H5I_INVALID_HID;
hid_t write_type_id = H5I_INVALID_HID;
hid_t member_type_id = H5I_INVALID_HID;
hid_t nmtype_id = H5I_INVALID_HID;
hid_t m_sid = H5I_INVALID_HID;
hid_t file_space_id = H5I_INVALID_HID;
hid_t preserve_id = H5I_INVALID_HID;
hsize_t count[1];
hsize_t offset[1];
hsize_t i;
size_t size_native;
char *member_name = NULL;
herr_t ret_val = -1;
/* check the arguments */
if (dset_name == NULL)
goto out;
/* create xfer properties to preserve initialized data */
if ((preserve_id = H5Pcreate(H5P_DATASET_XFER)) < 0)
goto out;
if (H5Pset_preserve(preserve_id, 1) < 0)
goto out;
/* open the dataset. */
if ((did = H5Dopen2(loc_id, dset_name, H5P_DEFAULT)) < 0)
goto out;
/* get the datatype */
if ((tid = H5Dget_type(did)) < 0)
goto out;
/* create a write id */
if ((write_type_id = H5Tcreate(H5T_COMPOUND, type_size)) < 0)
goto out;
/* iterate through the members */
for (i = 0; i < nfields; i++) {
unsigned j;
/* Range check value */
if (field_index[i] < 0)
goto out;
j = (unsigned)field_index[i];
/* get the member name */
if (NULL == (member_name = H5Tget_member_name(tid, j)))
goto out;
/* get the member type */
if ((member_type_id = H5Tget_member_type(tid, j)) < 0)
goto out;
/* convert to native type */
if ((nmtype_id = H5Tget_native_type(member_type_id, H5T_DIR_DEFAULT)) < 0)
goto out;
if (0 == (size_native = H5Tget_size(nmtype_id)))
goto out;
if (field_sizes[i] != size_native)
if (H5Tset_size(nmtype_id, field_sizes[i]) < 0)
goto out;
/* the field in the file is found by its name */
if (field_offset) {
if (H5Tinsert(write_type_id, member_name, field_offset[i], nmtype_id) < 0)
goto out;
} /* end if */
/* only one field */
else {
if (H5Tinsert(write_type_id, member_name, (size_t)0, nmtype_id) < 0)
goto out;
} /* end else */
/* close */
if (H5Tclose(member_type_id) < 0)
goto out;
member_type_id = H5I_INVALID_HID;
if (H5Tclose(nmtype_id) < 0)
goto out;
nmtype_id = H5I_INVALID_HID;
H5free_memory(member_name);
member_name = NULL;
} /* end for */
/* get the dataspace handles */
if ((file_space_id = H5Dget_space(did)) < 0)
goto out;
if ((m_sid = H5Screate_simple(1, &nrecords, NULL)) < 0)
goto out;
/* define a hyperslab in the dataset */
offset[0] = start;
count[0] = nrecords;
if (H5Sselect_hyperslab(file_space_id, H5S_SELECT_SET, offset, NULL, count, NULL) < 0)
goto out;
/* write */
if (H5Dwrite(did, write_type_id, m_sid, file_space_id, preserve_id, buf) < 0)
goto out;
ret_val = 0;
out:
if (member_name)
H5free_memory(member_name);
if (preserve_id > 0)
if (H5Pclose(preserve_id) < 0)
ret_val = -1;
if (write_type_id > 0)
if (H5Tclose(write_type_id) < 0)
ret_val = -1;
if (member_type_id > 0)
if (H5Tclose(member_type_id) < 0)
ret_val = -1;
if (nmtype_id > 0)
if (H5Tclose(nmtype_id) < 0)
ret_val = -1;
if (tid > 0)
if (H5Tclose(tid) < 0)
ret_val = -1;
if (file_space_id > 0)
if (H5Sclose(file_space_id) < 0)
ret_val = -1;
if (m_sid > 0)
if (H5Sclose(m_sid) < 0)
ret_val = -1;
if (did > 0)
if (H5Dclose(did) < 0)
ret_val = -1;
return ret_val;
} /* end H5TBwrite_fields_index() */
/*-------------------------------------------------------------------------
*
* Read functions
*
*-------------------------------------------------------------------------
*/
/*-------------------------------------------------------------------------
* Function: H5TBread_table
*
* Purpose: Reads a table
*
* Return: Success: 0, Failure: -1
*
* Comments:
*
*-------------------------------------------------------------------------
*/
herr_t
H5TBread_table(hid_t loc_id, const char *dset_name, size_t type_size, const size_t *field_offset,
const size_t *field_sizes, void *dst_buf)
{
hid_t did = H5I_INVALID_HID;
hid_t ftype_id = H5I_INVALID_HID;
hid_t mem_type_id = H5I_INVALID_HID;
hid_t sid = H5I_INVALID_HID;
hsize_t dims[1];
herr_t ret_val = -1;
/* check the arguments */
if (dset_name == NULL)
goto out;
/* open the dataset. */
if ((did = H5Dopen2(loc_id, dset_name, H5P_DEFAULT)) < 0)
goto out;
/* get the dataspace handle */
if ((sid = H5Dget_space(did)) < 0)
goto out;
/* get dimensions */
if (H5Sget_simple_extent_dims(sid, dims, NULL) < 0)
goto out;
/* get the datatypes */
if ((ftype_id = H5Dget_type(did)) < 0)
goto out;
if ((mem_type_id = H5TB_create_type(loc_id, dset_name, type_size, field_offset, field_sizes, ftype_id)) <
0)
goto out;
/* read */
if (H5Dread(did, mem_type_id, H5S_ALL, H5S_ALL, H5P_DEFAULT, dst_buf) < 0)
goto out;
ret_val = 0;
out:
if (mem_type_id > 0)
if (H5Tclose(mem_type_id) < 0)
ret_val = -1;
if (ftype_id > 0)
if (H5Tclose(ftype_id) < 0)
ret_val = -1;
if (sid > 0)
if (H5Sclose(sid) < 0)
ret_val = -1;
if (did > 0)
if (H5Dclose(did) < 0)
ret_val = -1;
return ret_val;
} /* end H5TBread_table() */
/*-------------------------------------------------------------------------
* Function: H5TBread_records
*
* Purpose: Reads records
*
* Return: Success: 0, Failure: -1
*
* Comments:
*
*-------------------------------------------------------------------------
*/
herr_t
H5TBread_records(hid_t loc_id, const char *dset_name, hsize_t start, hsize_t nrecords, size_t type_size,
const size_t *field_offset, const size_t *field_sizes, void *buf)
{
hid_t did = H5I_INVALID_HID;
hid_t ftype_id = H5I_INVALID_HID;
hid_t mem_type_id = H5I_INVALID_HID;
hsize_t nrecords_orig;
hsize_t nfields;
herr_t ret_val = -1;
/* check the arguments */
if (dset_name == NULL)
goto out;
/* get the number of records and fields */
if (H5TBget_table_info(loc_id, dset_name, &nfields, &nrecords_orig) < 0)
goto out;
/* open the dataset */
if ((did = H5Dopen2(loc_id, dset_name, H5P_DEFAULT)) < 0)
goto out;
/* get the datatypes */
if ((ftype_id = H5Dget_type(did)) < 0)
goto out;
if ((mem_type_id = H5TB_create_type(loc_id, dset_name, type_size, field_offset, field_sizes, ftype_id)) <
0)
goto out;
/* read the records */
if ((H5TB_common_read_records(did, mem_type_id, start, (size_t)nrecords, nrecords_orig, buf)) < 0)
goto out;
ret_val = 0;
out:
if (mem_type_id > 0)
if (H5Tclose(mem_type_id) < 0)
ret_val = -1;
if (ftype_id > 0)
if (H5Tclose(ftype_id) < 0)
ret_val = -1;
if (did > 0)
if (H5Dclose(did) < 0)
ret_val = -1;
return ret_val;
} /* end H5TBread_records() */
/*-------------------------------------------------------------------------
* Function: H5TBread_fields_name
*
* Purpose: Reads fields
*
* Return: Success: 0, Failure: -1
*
* Comments:
*
*-------------------------------------------------------------------------
*/
herr_t
H5TBread_fields_name(hid_t loc_id, const char *dset_name, const char *field_names, hsize_t start,
hsize_t nrecords, size_t type_size, const size_t *field_offset,
const size_t *field_sizes, void *buf)
{
hid_t did = H5I_INVALID_HID;
hid_t ftype_id = H5I_INVALID_HID;
hid_t mem_type_id = H5I_INVALID_HID;
hid_t mtype_id = H5I_INVALID_HID;
hid_t nmtype_id = H5I_INVALID_HID;
hid_t sid = H5I_INVALID_HID;
hid_t m_sid = H5I_INVALID_HID;
hssize_t nfields;
hsize_t count[1];
hsize_t offset[1];
hsize_t mem_size[1];
size_t size_native;
char *member_name = NULL;
hssize_t i, j;
herr_t ret_val = -1;
/* check the arguments */
if (dset_name == NULL)
goto out;
if (field_names == NULL)
goto out;
/* open the dataset */
if ((did = H5Dopen2(loc_id, dset_name, H5P_DEFAULT)) < 0)
goto out;
/* get the datatype */
if ((ftype_id = H5Dget_type(did)) < 0)
goto out;
/* get the number of fields */
if ((nfields = H5Tget_nmembers(ftype_id)) < 0)
goto out;
/* create a memory read id */
if ((mem_type_id = H5Tcreate(H5T_COMPOUND, type_size)) < 0)
goto out;
/* iterate through the members */
for (i = 0, j = 0; i < nfields; i++) {
/* get the member name */
if (NULL == (member_name = H5Tget_member_name(ftype_id, (unsigned)i)))
goto out;
if (H5TB_find_field(member_name, field_names)) {
/* get the member type */
if ((mtype_id = H5Tget_member_type(ftype_id, (unsigned)i)) < 0)
goto out;
/* convert to native type */
if ((nmtype_id = H5Tget_native_type(mtype_id, H5T_DIR_DEFAULT)) < 0)
goto out;
if (0 == (size_native = H5Tget_size(nmtype_id)))
goto out;
if (field_sizes[j] != size_native)
if (H5Tset_size(nmtype_id, field_sizes[j]) < 0)
goto out;
/* the field in the file is found by its name */
if (field_offset) {
if (H5Tinsert(mem_type_id, member_name, field_offset[j], nmtype_id) < 0)
goto out;
} /* end if */
else {
if (H5Tinsert(mem_type_id, member_name, (size_t)0, nmtype_id) < 0)
goto out;
} /* end else */
/* close */
if (H5Tclose(mtype_id) < 0)
goto out;
mtype_id = H5I_INVALID_HID;
if (H5Tclose(nmtype_id) < 0)
goto out;
nmtype_id = H5I_INVALID_HID;
j++;
} /* end if */
H5free_memory(member_name);
member_name = NULL;
} /* end for */
/* check to make sure field was found, no reason to continue if it does not exist */
if (j == 0)
goto out;
/* get the dataspace handle */
if ((sid = H5Dget_space(did)) < 0)
goto out;
/* define a hyperslab in the dataset */
offset[0] = start;
count[0] = nrecords;
if (H5Sselect_hyperslab(sid, H5S_SELECT_SET, offset, NULL, count, NULL) < 0)
goto out;
/* create a memory dataspace handle */
mem_size[0] = count[0];
if ((m_sid = H5Screate_simple(1, mem_size, NULL)) < 0)
goto out;
/* read */
if (H5Dread(did, mem_type_id, m_sid, sid, H5P_DEFAULT, buf) < 0)
goto out;
ret_val = 0;
out:
if (member_name)
H5free_memory(member_name);
if (mtype_id > 0)
if (H5Tclose(mtype_id) < 0)
ret_val = -1;
if (nmtype_id > 0)
if (H5Tclose(nmtype_id) < 0)
ret_val = -1;
if (mem_type_id > 0)
if (H5Tclose(mem_type_id) < 0)
ret_val = -1;
if (ftype_id > 0)
if (H5Tclose(ftype_id) < 0)
ret_val = -1;
if (m_sid > 0)
if (H5Sclose(m_sid) < 0)
ret_val = -1;
if (sid > 0)
if (H5Sclose(sid) < 0)
ret_val = -1;
if (did > 0)
if (H5Dclose(did) < 0)
ret_val = -1;
return ret_val;
} /* end H5TBread_fields_name() */
/*-------------------------------------------------------------------------
* Function: H5TBread_fields_index
*
* Purpose: Reads fields
*
* Return: Success: 0, Failure: -1
*
* Comments:
*
*-------------------------------------------------------------------------
*/
herr_t
H5TBread_fields_index(hid_t loc_id, const char *dset_name, hsize_t nfields, const int *field_index,