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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* Copyright by the Board of Trustees of the University of Illinois. *
* 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 COPYING file, which can be found at the root of the source code *
* distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#include "H5PacketTable.h"
/*-------------------------------------------------------------------------
* Packet Table Fixed-Length Example
*
* Example program that creates a packet table and performs
* writes and reads.
*
*-------------------------------------------------------------------------
*/
const char* FILE_NAME("PTcppexampleFL.h5");
const char* PT_NAME("/examplePacketTable");
int main(void)
{
herr_t err; /* Return value from function calls */
hid_t fileID; /* HDF5 identifier for file */
hid_t plistID; /* HDF5 identifier for property list to use compression */
hsize_t count; /* Number of records in table */
int x; /* Temporary counter variable */
/* Buffers to hold data */
int readBuffer[5];
int writeBuffer[5];
/* Initialize buffers */
for(x=0; x<5; x++)
{
writeBuffer[x]=x;
readBuffer[x] = -1;
}
/* Create a new HDF5 file */
fileID = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
if(fileID <0)
fprintf(stderr, "Couldn't create file.\n");
/* Prepare property list to set compression, randomly use deflate
with compression level 5. */
plistID = H5Pcreate(H5P_DATASET_CREATE);
err = H5Pset_deflate(plistID, 5);
if(err < 0)
fprintf(stderr, "Error setting compression level.");
/* Create a fixed-length packet table. */
FL_PacketTable ptable(fileID, plistID, PT_NAME, H5T_NATIVE_INT, 100);
if(! ptable.IsValid())
fprintf(stderr, "Unable to create packet table.");
/* Append five packets to the packet table, one at a time */
for(x=0; x<5; x++)
{
err = ptable.AppendPacket( &(writeBuffer[x]) );
if(err<0)
fprintf(stderr, "Error adding record.");
}
/* Get the number of packets in the packet table. This should be five. */
count = ptable.GetPacketCount(err);
if(err < 0)
fprintf(stderr, "Error getting packet count.");
printf("Number of packets in packet table after five appends: %d\n", count);
/* Initialize packet table's "current record" */
ptable.ResetIndex();
/* Iterate through packets, read each one back */
for(x=0; x<5; x++)
{
err = ptable.GetNextPacket( &(readBuffer[x]) );
if(err < 0)
fprintf(stderr, "Error reading record.");
printf("Packet %d's value is %d.\n", x, readBuffer[x]);
}
/* The packet table will close automatically when its object goes */
/* out of scope. */
err = H5Fclose(fileID);
if( err < 0 )
fprintf(stderr, "Failed to close file.\n");
return 0;
}
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