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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. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* Packet Table wrapper classes
*
* Wraps the H5PT Packet Table C functions in C++ objects
*
* Nat Furrer and James Laird
* February 2004
*/
#include "H5PacketTable.h"
/********************************/
/* PacketTable superclass */
/********************************/
/* "Open" Constructor
* Opens an existing packet table, which can contain either fixed-length or
* variable-length records.
*/
PacketTable::PacketTable(hid_t fileID, char* name)
{
table_id = H5PTopen( fileID, name);
}
/* Destructor
* Cleans up the packet table
*/
PacketTable::~PacketTable()
{
H5PTclose( table_id);
}
/* IsValid
* Returns true if this packet table is valid, false otherwise.
* Use this after the constructor to ensure HDF did not have
* any trouble making or opening the packet table.
*/
bool PacketTable::IsValid()
{
if (H5PTis_valid(table_id) == 0)
return true;
else
return false;
}
/* IsVariableLength
* Return 1 if this packet table is a Variable Length packet table,
* return 0 if it is Fixed Length. Returns -1 if the table is
* invalid (not open).
*/
int PacketTable::IsVariableLength()
{
return H5PTis_varlen(table_id);
}
/* ResetIndex
* Sets the "current record" to the first record in the packet table
*/
void PacketTable::ResetIndex()
{
H5PTcreate_index(table_id);
}
/* SetIndex
* Sets the current record to point to the record specified by index.
* Returns 0 on success, negative on failure (if index is out of bounds)
*/
int PacketTable::SetIndex(unsigned int index)
{
return H5PTset_index(table_id, index);
}
/* GetPacketCount
* Returns the number of records in the packet table. Error
* is set to 0 on success. On failure, returns 0 and
* error is set to negative.
*/
unsigned int PacketTable::GetPacketCount(int& error)
{
hsize_t nrecords;
error = H5PTget_num_packets( table_id, (hsize_t *)&nrecords);
return nrecords;
}
/********************************/
/* Fixed-Length Packet Table */
/********************************/
/* Constructor
* Creates a packet table in which to store fixed length records.
* Takes the ID of the file the packet table will be created in, the name of
* the packet table, the ID of the datatype of the set, and the size
* of a memory chunk used in chunking.
*/
FL_PacketTable::FL_PacketTable(hid_t fileID, char* name, hid_t dtypeID, int chunkSize)
{
table_id = H5PTcreate_fl ( fileID, name, dtypeID, chunkSize);
}
/* "Open" Constructor
* Opens an existing fixed-length packet table.
* Fails if the packet table specified is variable-length.
*/
FL_PacketTable::FL_PacketTable(hid_t fileID, char* name) : PacketTable(fileID, name)
{
if( H5PTis_varlen(table_id) != 0 ) // If this is not a fixed-length table
{
H5PTclose(table_id);
table_id = NULL;
}
}
/* AppendPacket
* Adds a single packet to the packet table. Takes a pointer
* to the location of the data in memory.
* Returns 0 on success, negative on failure
*/
int FL_PacketTable::AppendPacket(void * data)
{
return H5PTappend(table_id, 1, data);
}
/* AppendPackets (multiple packets)
* Adds multiple records to the packet table. Takes the number of records to be
* added and a pointer to their location in memory.
* Returns 0 on success, -1 on failure.
*/
int FL_PacketTable::AppendPackets(unsigned int numRecords, void * data)
{
return H5PTappend(table_id, numRecords, data);
}
/* GetPacket (indexed)
* Gets a single packet from the packet table. Takes the index
* of the record (with 0 being the first record) and a pointer
* to memory where the data should be stored.
* Returns 0 on success, negative on failure
*/
int FL_PacketTable::GetPacket(unsigned int index, void * data)
{
return H5PTread_packets(table_id, index, 1, data);
}
/* GetPackets (multiple packets)
* Gets multiple packets at once, all records between
* startIndex and endIndex inclusive. Also takes a pointer to
* the memory where these records should be stored.
* Returns 0 on success, negative on failure.
*/
int FL_PacketTable::GetPackets(unsigned int startIndex, unsigned int endIndex, void * data)
{
// Make sure the range of indexes is valid
if (startIndex > endIndex)
return -1;
return H5PTread_packets(table_id, startIndex, endIndex-startIndex+1, data);
}
/* GetNextPacket (single packet)
* Gets the next record in the packet table. Takes a pointer to
* memory where the record should be stored.
* Returns 0 on success, negative on failure. Current record
* is not advanced to the next record on failure.
*/
int FL_PacketTable::GetNextPacket(void * data)
{
return H5PTget_next(table_id, 1, data);
}
/* GetNextPackets (multiple packets)
* Gets the next numRecords records in the packet table. Takes a
* pointer to memory where these records should be stored.
* Returns 0 on success, negative on failure. Current record
* is not advanced on failure.
*/
int FL_PacketTable::GetNextPackets(unsigned int numRecords, void * data)
{
return H5PTget_next(table_id, numRecords, data);
}
/********************************/
/* Variable-Length Packet Table */
/********************************/
/* Constructor
* Creates a packet table in which to store variable length records.
* Takes the ID of the file the packet table will be created in, the name of
* the packet table, and the size of a memory chunk used in chunking.
*/
VL_PacketTable::VL_PacketTable(hid_t fileID, char* name, int chunkSize)
{
table_id = H5PTcreate_vl ( fileID, name, chunkSize);
}
/* "Open" Constructor
* Opens an existing variable-length packet table.
* Fails if the packet table specified is fixed-length.
*/
VL_PacketTable::VL_PacketTable(hid_t fileID, char* name) : PacketTable(fileID, name)
{
if( H5PTis_varlen(table_id) != 1 ) // If this is not a variable-length table
{
H5PTclose(table_id);
table_id = NULL;
}
}
/* AppendPacket (variable-length)
* Adds a single variable-length packet to the packet table.
* Takes a pointer to the location of the data in memory and the length of the data
* in bytes.
* Returns 0 on success, negative on failure.
*/
int VL_PacketTable::AppendPacket(void * data, unsigned int length)
{
hvl_t packet;
packet.len = length;
packet.p = data;
return H5PTappend(table_id, 1, &packet);
}
/* AppendPackets (multiple packets)
* Adds multiple variable-length records to the packet table. Takes the number of
* records to be added and a pointer to an array of hvl_t structs in memory.
* Returns 0 on success, negative on failure.
*/
int VL_PacketTable::AppendPackets(unsigned int numRecords, hvl_t * data)
{
return H5PTappend(table_id, numRecords, data);
}
/* GetPacket (indexed)
* Gets a single variable-length record from the packet table. Takes the index
* of the record (with 0 being the first record) and a pointer
* to a hvl_t struct in which to store the record's size and location.
* Returns 0 on success, negative on failure.
*/
int VL_PacketTable::GetPacket(unsigned int index, hvl_t * data)
{
return H5PTread_packets(table_id, index, 1, data);
}
/* GetPackets (multiple packets)
* Gets multiple variable-length records at once, all records between
* startIndex and endIndex inclusive. Takes a pointer to an array
* of hvl_t structs in memory in which to store pointers to the records.
* Returns 0 on success, negative on failure.
*/
int VL_PacketTable::GetPackets(unsigned int startIndex, unsigned int endIndex, hvl_t * data)
{
// Make sure the range of indexes is valid
if (startIndex > endIndex)
return -1;
return H5PTread_packets(table_id, startIndex, endIndex-startIndex+1, data);
}
/* GetNextPacket (single packet)
* Gets the next record in the packet table. Takes a pointer to
* an hvl_t struct where the record should be stored.
* Returns 0 on success, negative on failure. Current record
* is not advanced to the next record on failure.
*/
int VL_PacketTable::GetNextPacket(hvl_t * data)
{
return H5PTget_next(table_id, 1, data);
}
/* GetNextPackets (multiple packets)
* Gets the next numRecords records in the packet table. Takes a
* pointer to an array of hvl_t structs where pointers to the records
* should be stored.
* Returns 0 on success, negative on failure. Current record
* is not advanced on failure.
*/
int VL_PacketTable::GetNextPackets(unsigned int numRecords, hvl_t * data)
{
return H5PTget_next(table_id, numRecords, data);
}
/* FreeReadbuff
* Frees the buffers created when variable-length records are read.
* Takes the number of hvl_t structs to be freed and a pointer to their location
* in memory.
* Returns 0 on success, negative on error.
*/
int VL_PacketTable::FreeReadbuff(unsigned int numStructs, hvl_t * buffer)
{
return H5PTfree_vlen_readbuff( table_id, numStructs, buffer);
}
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