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https://github.com/HDFGroup/hdf5.git
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220fdf4113
Bug fix Description: When variables were declared in for loops C++ compiler on Cray X1 scoped them oddly, leading to compilation errors. Solution: Moved variable declarations out of for loops (where they probably shouldn't have been anyway) to the beginning of the function. Platforms tested: mir, Cray X1 (minor change)
110 lines
4.0 KiB
C++
110 lines
4.0 KiB
C++
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Copyright by the Board of Trustees of the University of Illinois. *
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* All rights reserved. *
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* *
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* This file is part of HDF5. The full HDF5 copyright notice, including *
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* terms governing use, modification, and redistribution, is contained in *
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* the files COPYING and Copyright.html. COPYING can be found at the root *
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* of the source code distribution tree; Copyright.html can be found at the *
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* root level of an installed copy of the electronic HDF5 document set and *
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* is linked from the top-level documents page. It can also be found at *
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* http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
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* access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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#include "H5PacketTable.h"
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/*-------------------------------------------------------------------------
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* Packet Table Variable-Length Example
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*
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* Example program that creates a packet table and performs
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* writes and reads.
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*
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*-------------------------------------------------------------------------
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*/
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int main(void)
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{
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herr_t err; /* Return value from function calls */
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hid_t fileID; /* HDF5 identifier for file */
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hsize_t count; /* Number of records in table */
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int x; /* Loop variable */
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/* This example has two different sizes of "record": longs and shorts */
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long longBuffer[5];
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short shortBuffer[5];
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/* Buffer of hvl_t structs to read back records */
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hvl_t readBuffer[5];
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/* Initialize buffers */
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for(x=0; x<5; x++)
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{
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longBuffer[x] = -x;
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shortBuffer[x] = x;
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}
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/* Create a new HDF5 file */
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fileID = H5Fcreate("PTcppexampleVL.h5", H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
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if(fileID <0)
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fprintf(stderr, "Couldn't create file.\n");
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/* Create a variable-length packet table. */
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VL_PacketTable ptable(fileID, "/examplePacketTable", 1);
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if(! ptable.IsValid())
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fprintf(stderr, "Unable to create packet table.");
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/* Append five packets to the packet table. */
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/* In C++, there is no need to package data into hvl_t structs. */
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err = ptable.AppendPacket( &(longBuffer[0]), sizeof(long));
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if(err < 0)
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fprintf(stderr, "Error adding record.");
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err = ptable.AppendPacket( &(shortBuffer[1]), sizeof(short));
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if(err < 0)
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fprintf(stderr, "Error adding record.");
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err = ptable.AppendPacket( &(longBuffer[2]), sizeof(long));
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if(err < 0)
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fprintf(stderr, "Error adding record.");
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err = ptable.AppendPacket( &(longBuffer[3]), sizeof(long));
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if(err < 0)
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fprintf(stderr, "Error adding record.");
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err = ptable.AppendPacket( &(shortBuffer[4]), sizeof(short));
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if(err < 0)
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fprintf(stderr, "Error adding record.");
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/* Get the number of packets in the packet table. This should be five. */
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count = ptable.GetPacketCount(err);
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if(err < 0)
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fprintf(stderr, "Error getting packet count.");
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printf("Number of packets in packet table after five appends: %d\n", count);
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/* Initialize packet table's "current record" */
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ptable.ResetIndex();
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/* Iterate through packets, read each one back */
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for(x=0; x<5; x++)
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{
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err = ptable.GetNextPacket( &(readBuffer[x]) );
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if(err < 0)
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fprintf(stderr, "Error reading record.");
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printf("Packet %d's length is %d.\n", x, readBuffer[x].len);
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if(readBuffer[x].len == sizeof(long))
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printf("Packet %d's value is %d.\n", x, *((long *) readBuffer[x].p) );
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else
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printf("Packet %d's value is %d.\n", x, *((short *) readBuffer[x].p) );
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}
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/* The packet table will close automatically when its object goes */
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/* out of scope. */
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err = H5Fclose(fileID);
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if( err < 0 )
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fprintf(stderr, "Failed to close file.\n");
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return 0;
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}
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