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HDF5  1.14.4.3
API Reference
 
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HDF5 Table APIs (H5TB)

Detailed Description

Creating and manipulating HDF5 datasets intended to be interpreted as tables (H5TB)

The HDF5 Table API defines a standard storage for HDF5 datasets that are intended to be interpreted as tables. A table is defined as a collection of records whose values are stored in fixed-length fields. All records have the same structure, and all values in each field have the same data type.

Note
Programming hints:
To use any of these functions or subroutines, you must first include the relevant include file (C) or module (Fortran) in your application.
The following line includes the HDF5 Table package, H5TB, in C applications:
#include "hdf5_hl.h"
To include the H5TB module in Fortran applications specify:
use h5tb
This module contains Fortran interfaces for H5TB.
Definition H5TBff.F90:36
Fortran applications must also include H5open before any HDF5 calls to initialize global variables and H5close after all HDF5 calls to close the Fortran interface.

Functions

H5_HLDLL 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)
 Creates and writes a table.
 
H5_HLDLL 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 *dst_sizes, const void *buf)
 Adds records to the end of the table.
 
H5_HLDLL 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 *dst_sizes, const void *buf)
 Overwrites records.
 
H5_HLDLL 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 *dst_sizes, const void *buf)
 Overwrites fields.
 
H5_HLDLL 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 *dst_sizes, const void *buf)
 Overwrites fields.
 
H5_HLDLL herr_t H5TBread_table (hid_t loc_id, const char *dset_name, size_t dst_size, const size_t *dst_offset, const size_t *dst_sizes, void *dst_buf)
 Reads a table.
 
H5_HLDLL 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 *dst_sizes, void *buf)
 Reads one or several fields. The fields are identified by name.
 
H5_HLDLL herr_t H5TBread_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 *dst_sizes, void *buf)
 Reads one or several fields. The fields are identified by index.
 
H5_HLDLL 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 *dst_offset, const size_t *dst_sizes, void *buf)
 Reads records.
 
H5_HLDLL herr_t H5TBget_table_info (hid_t loc_id, const char *dset_name, hsize_t *nfields, hsize_t *nrecords)
 Gets the table dimensions.
 
H5_HLDLL herr_t H5TBget_field_info (hid_t loc_id, const char *dset_name, char *field_names[], size_t *field_sizes, size_t *field_offsets, size_t *type_size)
 Gets information about a table.
 
H5_HLDLL herr_t H5TBdelete_record (hid_t loc_id, const char *dset_name, hsize_t start, hsize_t nrecords)
 Delete records.
 
H5_HLDLL herr_t H5TBinsert_record (hid_t loc_id, const char *dset_name, hsize_t start, hsize_t nrecords, size_t dst_size, const size_t *dst_offset, const size_t *dst_sizes, void *buf)
 Insert records.
 
H5_HLDLL herr_t H5TBadd_records_from (hid_t loc_id, const char *dset_name1, hsize_t start1, hsize_t nrecords, const char *dset_name2, hsize_t start2)
 Add records from first table to second table.
 
H5_HLDLL herr_t H5TBcombine_tables (hid_t loc_id1, const char *dset_name1, hid_t loc_id2, const char *dset_name2, const char *dset_name3)
 Combines records from two tables into a third.
 
H5_HLDLL herr_t H5TBinsert_field (hid_t loc_id, const char *dset_name, const char *field_name, hid_t field_type, hsize_t position, const void *fill_data, const void *buf)
 Insert a new field into a table.
 
H5_HLDLL herr_t H5TBdelete_field (hid_t loc_id, const char *dset_name, const char *field_name)
 Deletes a field from a table.
 
H5_HLDLL herr_t H5TBAget_title (hid_t loc_id, char *table_title)
 Reads a table's title.
 
H5_HLDLL htri_t H5TBAget_fill (hid_t loc_id, const char *dset_name, hid_t dset_id, unsigned char *dst_buf)
 Reads the table attribute fill values.
 

Function Documentation

◆ H5TBadd_records_from()

H5_HLDLL herr_t H5TBadd_records_from ( hid_t  loc_id,
const char *  dset_name1,
hsize_t  start1,
hsize_t  nrecords,
const char *  dset_name2,
hsize_t  start2 
)

Add records from first table to second table.


Parameters
[in]loc_idLocation identifier. The identifier may be that of a file or group.
[in]dset_name1The name of the dataset to read the records
[in]start1The position to read the records from the first table
[in]nrecordsThe number of records to read from the first table
[in]dset_name2The name of the dataset to write the records
[in]start2The position to write the records on the second table
Returns
Returns a non-negative value if successful; otherwise, returns a negative value.

H5TBadd_records_from() adds records from a dataset named dset_name1 to a dataset named dset_name2. Both tables are attached to the object specified by the identifier loc_id.

◆ H5TBAget_fill()

H5_HLDLL htri_t H5TBAget_fill ( hid_t  loc_id,
const char *  dset_name,
hid_t  dset_id,
unsigned char *  dst_buf 
)

Reads the table attribute fill values.


Parameters
[in]loc_idLocation identifier. The identifier may be that of a file or group.
[in]dset_nameName of table
[in]dset_idTable identifier
[out]dst_bufBuffer of fill values for table fields
Returns
A return value of 1 indicates that a fill value is present.
A return value of 0 indicates a fill value is not present.
A return value <0 indicates an error.

H5TBget_fill() reads the table attribute fill values into the buffer dst_buf for the table specified by dset_id and dset_name located in loc_id.

Example
unsigned char tmp_fill_buf[40];
...
file_id = H5Fopen(FILENAME, H5F_ACC_RDWR, H5P_DEFAULT);
dataset_id = H5Dopen(file_id, TABLE_NAME, H5P_DEFAULT);
datatype_id = H5Dget_type(dataset_id);
status = H5TBget_table_info(file_id, TABLE_NAME, &nfields, &nrecords);
hasfill = H5TBAget_fill(file_id, TABLE_NAME, dataset_id, tmp_fill_buf);
for (i = 0; i < nfields; i++) {
member_type_id = H5Tget_member_type(datatype_id, (unsigned)i);
native_mem_type_id = H5Tget_native_type(member_type_id, H5T_DIR_ASCEND);
member_offset = H5Tget_member_offset(datatype_id, (unsigned)i);
printf("member_offset: %i\n", member_offset);
memb_class = H5Tget_class(member_type_id);
switch (memb_class) {
/* convert unsigned char array to integer */
break;
case H5T_FLOAT:
/* convert unsigned char array to double or float */
if (H5Tequal(native_mem_type_id, H5T_NATIVE_DOUBLE)) {
}
else if (H5Tequal(native_mem_type_id, H5T_NATIVE_FLOAT)) {
f.i = tmp_fill_buf[member_offset] | (tmp_fill_buf[member_offset + 1] << 8) |
(tmp_fill_buf[member_offset + 2] << 16) | (tmp_fill_buf[member_offset + 3] << 24);
printf("Field %i Fill Value: %lf\n", i, f.f);
}
break;
case H5T_STRING:
/* convert unsigned char array to string */
strsize = H5Tget_size(member_type_id);
printf("Field %i Fill Value: ", i);
for (j = 0; j < strsize; j++)
printf("%c", tmp_fill_buf[member_offset + j]);
printf("\n");
break;
}
#define H5F_ACC_RDWR
Definition H5Fpublic.h:49
#define H5P_DEFAULT
Definition H5Ppublic.h:228
@ H5T_STRING
Definition H5Tpublic.h:35
@ H5T_FLOAT
Definition H5Tpublic.h:33
@ H5T_INTEGER
Definition H5Tpublic.h:32
@ H5T_DIR_ASCEND
Definition H5Tpublic.h:159
#define H5Dopen
Definition H5version.h:727
size_t H5Tget_member_offset(hid_t type_id, unsigned membno)
Retrieves the offset of a field of a compound datatype.
hid_t H5Tget_member_type(hid_t type_id, unsigned membno)
Returns the datatype of the specified member.
hid_t H5Dget_type(hid_t dset_id)
Returns an identifier for a copy of the datatype for a dataset.
hid_t H5Fopen(const char *filename, unsigned flags, hid_t fapl_id)
Opens an existing HDF5 file.
H5_HLDLL herr_t H5TBget_table_info(hid_t loc_id, const char *dset_name, hsize_t *nfields, hsize_t *nrecords)
Gets the table dimensions.
H5_HLDLL htri_t H5TBAget_fill(hid_t loc_id, const char *dset_name, hid_t dset_id, unsigned char *dst_buf)
Reads the table attribute fill values.
hid_t H5Tget_native_type(hid_t type_id, H5T_direction_t direction)
Returns the native datatype identifier of a specified datatype.
size_t H5Tget_size(hid_t type_id)
Returns the size of a datatype.
H5T_class_t H5Tget_class(hid_t type_id)
Returns a datatype class.
htri_t H5Tequal(hid_t type1_id, hid_t type2_id)
Determines whether two datatype identifiers refer to the same datatype.
#define H5T_NATIVE_DOUBLE
Definition H5Tpublic.h:819
#define H5T_NATIVE_FLOAT
Definition H5Tpublic.h:814

◆ H5TBAget_title()

H5_HLDLL herr_t H5TBAget_title ( hid_t  loc_id,
char *  table_title 
)

Reads a table's title.


Parameters
[in]loc_idLocation identifier. The identifier may be that of a file or group.
[out]table_titleBuffer for title name
Returns
Returns a non-negative value if successful; otherwise, returns a negative value.

H5TBget_title() returns the title of the table identified by loc_id in a buffer table_title.

◆ H5TBappend_records()

H5_HLDLL 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 *  dst_sizes,
const void *  buf 
)

Adds records to the end of the table.


Parameters
[in]loc_idLocation identifier. The identifier may be that of a file or group.
[in]dset_nameThe name of the dataset to overwrite
[in]nrecordsThe number of records to append
[in]type_sizeThe size of the structure type, as calculated by sizeof().
[in]field_offsetAn array containing the offsets of the fields. These offsets can be calculated with the HOFFSET macro
[in]dst_sizesAn array containing the sizes of the fields
[in]bufBuffer with data
Returns
Returns a non-negative value if successful; otherwise, returns a negative value.

H5TBappend_records() adds records to the end of the table named dset_name attached to the object specified by the identifier loc_id. The dataset is extended to hold the new records.

◆ H5TBcombine_tables()

H5_HLDLL herr_t H5TBcombine_tables ( hid_t  loc_id1,
const char *  dset_name1,
hid_t  loc_id2,
const char *  dset_name2,
const char *  dset_name3 
)

Combines records from two tables into a third.


Parameters
[in]loc_id1Identifier of the file or group in which the first table is located
[in]dset_name1The name of the first table to combine
[in]loc_id2Identifier of the file or group in which the second table is located
[in]dset_name2The name of the second table to combine
[in]dset_name3The name of the new table
Returns
Returns a non-negative value if successful; otherwise, returns a negative value.

H5TBcombine_tables() combines records from two datasets named dset_name1 and dset_name2, to a new table named dset_name3. These tables can be located on different files, identified by loc_id1 and loc_id2 (identifiers obtained with H5Fcreate()). They can also be located on the same file. In this case one uses the same identifier for both parameters loc_id1 and loc_id2. If two files are used, the third table is written in the first file.

◆ H5TBdelete_field()

H5_HLDLL herr_t H5TBdelete_field ( hid_t  loc_id,
const char *  dset_name,
const char *  field_name 
)

Deletes a field from a table.


Parameters
[in]loc_idLocation identifier. The identifier may be that of a file or group.
[in]dset_nameThe name of the table
[in]field_nameThe name of the field to delete
Returns
Returns a non-negative value if successful; otherwise, returns a negative value.

H5TBdelete_field() deletes a field named field_name from the table dset_name. Note: this function requires the table to be re-created and rewritten in its entirety, and this can result in some unused space in the file, and can also take a great deal of time if the table is large.

◆ H5TBdelete_record()

H5_HLDLL herr_t H5TBdelete_record ( hid_t  loc_id,
const char *  dset_name,
hsize_t  start,
hsize_t  nrecords 
)

Delete records.


Parameters
[in]loc_idLocation identifier. The identifier may be that of a file or group.
[in]dset_nameThe name of the dataset
[in]startThe start record to delete from
[in]nrecordsThe number of records to delete
Returns
Returns a non-negative value if successful; otherwise, returns a negative value.

H5TBdelete_record() deletes nrecords number of records starting from start from the middle of the table dset_name ("pulling up" all the records after it).

◆ H5TBget_field_info()

H5_HLDLL herr_t H5TBget_field_info ( hid_t  loc_id,
const char *  dset_name,
char *  field_names[],
size_t *  field_sizes,
size_t *  field_offsets,
size_t *  type_size 
)

Gets information about a table.


Parameters
[in]loc_idLocation identifier. The identifier may be that of a file or group.
[in]dset_nameThe name of the dataset to read
[out]field_namesAn array containing the names of the fields
[out]field_sizesAn array containing the size of the fields
[out]field_offsetsAn array containing the offsets of the fields
[out]type_sizeThe size of the HDF5 datatype associated with the table. (More specifically, the size in bytes of the HDF5 compound datatype used to define a row, or record, in the table)
Returns
Returns a non-negative value if successful; otherwise, returns a negative value.

H5TBget_field_info() gets information about a dataset named dset_name attached to the object specified by the identifier loc_id.

◆ H5TBget_table_info()

H5_HLDLL herr_t H5TBget_table_info ( hid_t  loc_id,
const char *  dset_name,
hsize_t nfields,
hsize_t nrecords 
)

Gets the table dimensions.


Parameters
[in]loc_idLocation identifier. The identifier may be that of a file or group.
[in]dset_nameThe name of the dataset to read
[out]nfieldsThe number of fields
[out]nrecordsThe number of records
Returns
Returns a non-negative value if successful; otherwise, returns a negative value.

H5TBget_table_info() retrieves the table dimensions from a dataset named dset_name attached to the object specified by the identifier loc_id.

◆ H5TBinsert_field()

H5_HLDLL herr_t H5TBinsert_field ( hid_t  loc_id,
const char *  dset_name,
const char *  field_name,
hid_t  field_type,
hsize_t  position,
const void *  fill_data,
const void *  buf 
)

Insert a new field into a table.


Parameters
[in]loc_idLocation identifier. The identifier may be that of a file or group.
[in]dset_nameThe name of the table
[in]field_nameThe name of the field to insert
[in]field_typeThe data type of the field
[in]positionThe zero based index position where to insert the field
[in]fill_dataFill value data for the field. This parameter can be NULL
[in]bufBuffer with data
Returns
Returns a non-negative value if successful; otherwise, returns a negative value.

H5TBinsert_field() inserts a new field named field_name into the table dset_name. Note: this function requires the table to be re-created and rewritten in its entirety, and this can result in some unused space in the file, and can also take a great deal of time if the table is large.

◆ H5TBinsert_record()

H5_HLDLL herr_t H5TBinsert_record ( hid_t  loc_id,
const char *  dset_name,
hsize_t  start,
hsize_t  nrecords,
size_t  dst_size,
const size_t *  dst_offset,
const size_t *  dst_sizes,
void *  buf 
)

Insert records.


Parameters
[in]loc_idLocation identifier. The identifier may be that of a file or group.
[in]dset_nameThe name of the dataset
[in]startThe position to insert
[in]nrecordsThe number of records to insert
[in]dst_sizeThe size in bytes of the structure associated with the table
[in]dst_offsetAn array containing the offsets of the fields
[in]dst_sizesAn array containing the size in bytes of the fields
[in]bufBuffer with data
Returns
Returns a non-negative value if successful; otherwise, returns a negative value.

H5TBinsert_record() inserts records into the middle of the table ("pushing down" all the records after it)

◆ H5TBmake_table()

H5_HLDLL 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 
)

Creates and writes a table.


Parameters
[in]table_titleThe title of the table
[in]loc_idLocation identifier. The identifier may be that of a file or group.
[in]dset_nameThe name of the dataset to create
[in]nfieldsThe number of fields
[in]nrecordsThe number of records
[in]type_sizeThe size in bytes of the structure associated with the table; This value is obtained with sizeof().
[in]field_namesAn array containing the names of the fields
[in]field_offsetAn array containing the offsets of the fields
[in]field_typesAn array containing the type of the fields
[in]chunk_sizeThe chunk size
[in]fill_dataFill values data
[in]compressFlag that turns compression on or off
[in]bufBuffer with data to be written to the table
Returns
Returns a non-negative value if successful; otherwise, returns a negative value.

H5TBmake_table() creates and writes a dataset named dset_name attached to the object specified by the identifier loc_id.

◆ H5TBread_fields_index()

H5_HLDLL herr_t H5TBread_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 *  dst_sizes,
void *  buf 
)

Reads one or several fields. The fields are identified by index.


Parameters
[in]loc_idLocation identifier. The identifier may be that of a file or group.
[in]dset_nameThe name of the dataset to read
[in]nfieldsThe number of fields to read (This parameter is also the size of the field_index array.) fields to read
[in]field_indexThe indexes of the fields to read
[in]startThe start record to read from
[in]nrecordsThe number of records to read
[in]type_sizeThe size in bytes of the structure associated with the table (This value is obtained with sizeof())
[in]field_offsetAn array containing the offsets of the fields
[in]dst_sizesAn array containing the size in bytes of the fields
[out]bufBuffer with data
Returns
Returns a non-negative value if successful; otherwise, returns a negative value.

H5TBread_fields_index() reads the fields identified by field_index from a dataset named dset_name attached to the object specified by the identifier loc_id.

◆ H5TBread_fields_name()

H5_HLDLL 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 *  dst_sizes,
void *  buf 
)

Reads one or several fields. The fields are identified by name.


Parameters
[in]loc_idLocation identifier. The identifier may be that of a file or group.
[in]dset_nameThe name of the dataset to read
[in]field_namesAn array containing the names of the fields to read
[in]startThe start record to read from
[in]nrecordsThe number of records to read
[in]type_sizeThe size in bytes of the structure associated with the table (This value is obtained with sizeof().)
[in]field_offsetAn array containing the offsets of the fields
[in]dst_sizesAn array containing the size in bytes of the fields
[out]bufBuffer with data
Returns
Returns a non-negative value if successful; otherwise, returns a negative value.

H5TBread_fields_name() reads the fields identified by field_names from a dataset named dset_name attached to the object specified by the identifier loc_id.

◆ H5TBread_records()

H5_HLDLL 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 *  dst_offset,
const size_t *  dst_sizes,
void *  buf 
)

Reads records.


Parameters
[in]loc_idLocation identifier. The identifier may be that of a file or group.
[in]dset_nameThe name of the dataset to read
[in]startThe start record to read from
[in]nrecordsThe number of records to read
[in]type_sizeThe size of the structure type, as calculated by sizeof()
[in]dst_offsetAn array containing the offsets of the fields. These offsets can be calculated with the HOFFSET macro
[in]dst_sizesAn array containing the size in bytes of the fields
[out]bufBuffer with data
Returns
Returns a non-negative value if successful; otherwise, returns a negative value.

H5TBread_records() reads some records identified from a dataset named dset_name attached to the object specified by the identifier loc_id.

◆ H5TBread_table()

H5_HLDLL herr_t H5TBread_table ( hid_t  loc_id,
const char *  dset_name,
size_t  dst_size,
const size_t *  dst_offset,
const size_t *  dst_sizes,
void *  dst_buf 
)

Reads a table.


Parameters
[in]loc_idLocation identifier. The identifier may be that of a file or group.
[in]dset_nameThe name of the dataset to read
[in]dst_sizeThe size of the structure type, as calculated by sizeof()
[in]dst_offsetAn array containing the offsets of the fields. These offsets can be calculated with the HOFFSET macro
[in]dst_sizesAn array containing the sizes of the fields. These sizes can be calculated with the sizeof() macro.
[in]dst_bufBuffer with data
Returns
Returns a non-negative value if successful; otherwise, returns a negative value.

H5TBread_table() reads a table named dset_name attached to the object specified by the identifier loc_id.

◆ H5TBwrite_fields_index()

H5_HLDLL 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 *  dst_sizes,
const void *  buf 
)

Overwrites fields.


Parameters
[in]loc_idLocation identifier. The identifier may be that of a file or group.
[in]dset_nameThe name of the dataset to overwrite
[in]nfieldsThe number of fields to overwrite. This parameter is also the size of the field_index array.
[in]field_indexThe indexes of the fields to write
[in]startThe zero based index record to start writing
[in]nrecordsThe number of records to write
[in]type_sizeThe size of the structure type, as calculated by sizeof().
[in]field_offsetAn array containing the offsets of the fields. These offsets can be calculated with the HOFFSET macro
[in]dst_sizesAn array containing the sizes of the fields
[in]bufBuffer with data
Returns
Returns a non-negative value if successful; otherwise, returns a negative value.

H5TBwrite_fields_index() overwrites one or several fields specified by field_index with a buffer buf from a dataset named dset_name attached to the object specified by the identifier loc_id.

◆ H5TBwrite_fields_name()

H5_HLDLL 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 *  dst_sizes,
const void *  buf 
)

Overwrites fields.


Parameters
[in]loc_idLocation identifier. The identifier may be that of a file or group.
[in]dset_nameThe name of the dataset to overwrite
[in]field_namesThe names of the fields to write
[in]startThe zero index record to start writing
[in]nrecordsThe number of records to write
[in]type_sizeThe size of the structure type, as calculated by sizeof().
[in]field_offsetAn array containing the offsets of the fields. These offsets can be calculated with the HOFFSET macro
[in]dst_sizesAn array containing the sizes of the fields
[in]bufBuffer with data
Returns
Returns a non-negative value if successful; otherwise, returns a negative value.

H5TBwrite_fields_name() overwrites one or several fields specified by field_names with data in buf from a dataset named dset_name attached to the object specified by the identifier loc_id.

◆ H5TBwrite_records()

H5_HLDLL 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 *  dst_sizes,
const void *  buf 
)

Overwrites records.


Parameters
[in]loc_idLocation identifier. The identifier may be that of a file or group.
[in]dset_nameThe name of the dataset to overwrite
[in]startThe zero index record to start writing
[in]nrecordsThe number of records to write
[in]type_sizeThe size of the structure type, as calculated by sizeof().
[in]field_offsetAn array containing the offsets of the fields. These offsets can be calculated with the HOFFSET macro
[in]dst_sizesAn array containing the sizes of the fields
[in]bufBuffer with data
Returns
Returns a non-negative value if successful; otherwise, returns a negative value.

H5TBwrite_records() overwrites records starting at the zero index position start of the table named dset_name attached to the object specified by the identifier loc_id.