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+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * 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 files COPYING and Copyright.html. COPYING can be found at the root *
+ * of the source code distribution tree; Copyright.html can be found at the *
+ * root level of an installed copy of the electronic HDF5 document set and *
+ * is linked from the top-level documents page. It can also be found at *
+ * http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
+ * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#include "H5PacketTable.h"
+
+/*-------------------------------------------------------------------------
+ * Packet Table Variable-Length Example
+ *
+ * Example program that creates a packet table and performs
+ * writes and reads.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+int main(void)
+{
+ herr_t err; /* Return value from function calls */
+ hid_t fileID; /* HDF5 identifier for file */
+ hsize_t count; /* Number of records in table */
+ int x; /* Loop variable */
+
+ /* This example has two different sizes of "record": longs and shorts */
+ long longBuffer[5];
+ short shortBuffer[5];
+
+ /* Buffer of hvl_t structs to read back records */
+ hvl_t readBuffer[5];
+
+ /* Initialize buffers */
+ for(x=0; x<5; x++)
+ {
+ longBuffer[x] = -x;
+ shortBuffer[x] = x;
+ }
+
+ /* Create a new HDF5 file */
+ fileID = H5Fcreate("PTcppexampleVL.h5", H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
+ if(fileID <0)
+ fprintf(stderr, "Couldn't create file.\n");
+
+ /* Create a variable-length packet table. */
+ VL_PacketTable ptable(fileID, "/examplePacketTable", 1);
+
+ if(! ptable.IsValid())
+ fprintf(stderr, "Unable to create packet table.");
+
+ /* Append five packets to the packet table. */
+ /* In C++, there is no need to package data into hvl_t structs. */
+ err = ptable.AppendPacket( &(longBuffer[0]), sizeof(long));
+ if(err < 0)
+ fprintf(stderr, "Error adding record.");
+ err = ptable.AppendPacket( &(shortBuffer[1]), sizeof(short));
+ if(err < 0)
+ fprintf(stderr, "Error adding record.");
+ err = ptable.AppendPacket( &(longBuffer[2]), sizeof(long));
+ if(err < 0)
+ fprintf(stderr, "Error adding record.");
+ err = ptable.AppendPacket( &(longBuffer[3]), sizeof(long));
+ if(err < 0)
+ fprintf(stderr, "Error adding record.");
+ err = ptable.AppendPacket( &(shortBuffer[4]), sizeof(short));
+ 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(int x=0; x<5; x++)
+ {
+ err = ptable.GetNextPacket( &(readBuffer[x]) );
+ if(err < 0)
+ fprintf(stderr, "Error reading record.");
+
+ printf("Packet %d's length is %d.\n", x, readBuffer[x].len);
+ if(readBuffer[x].len == sizeof(long))
+ printf("Packet %d's value is %d.\n", x, *((long *) readBuffer[x].p) );
+ else
+ printf("Packet %d's value is %d.\n", x, *((short *) readBuffer[x].p) );
+ }
+
+ /* 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;
+}
+