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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
*/
#ifndef H5PTWRAP_H
#define H5PTWRAP_H
#include "H5PT.h"
class H5_HLCPPDLL PacketTable
{
public:
/* Null constructor
* Sets table_id to "invalid"
*/
PacketTable() {table_id = H5I_BADID;}
/* "Open" Constructor
* Opens an existing packet table, which can contain either fixed-length or
* variable-length packets.
*/
PacketTable(hid_t fileID, char* name);
/* Destructor
* Cleans up the packet table
*/
~PacketTable();
/* 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 IsValid();
/* 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 IsVariableLength();
/* ResetIndex
* Sets the "current packet" index to point to the first packet in the
* packet table
*/
void ResetIndex();
/* SetIndex
* Sets the current packet to point to the packet specified by index.
* Returns 0 on success, negative on failure (if index is out of bounds)
*/
int SetIndex(unsigned int index);
/* GetPacketCount
* Returns the number of packets in the packet table. Error
* is set to 0 on success. On failure, returns 0 and
* error is set to negative.
*/
hsize_t GetPacketCount(int& error);
unsigned int GetPacketCount()
{
int ignoreError;
return GetPacketCount(ignoreError);
}
protected:
hid_t table_id;
};
class H5_HLCPPDLL FL_PacketTable : virtual public PacketTable
{
public:
/* Constructor
* Creates a packet table in which to store fixed length packets.
* 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(hid_t fileID, char* name, hid_t dtypeID, int chunkSize);
/* "Open" Constructor
* Opens an existing fixed-length packet table.
* Fails if the packet table specified is variable-length.
*/
FL_PacketTable(hid_t fileID, char* name);
/* 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 AppendPacket(void * data);
/* AppendPackets (multiple packets)
* Adds multiple packets to the packet table. Takes the number of packets
* to be added and a pointer to their location in memory.
* Returns 0 on success, -1 on failure.
*/
int AppendPackets(unsigned int numPackets, void * data);
/* GetPacket (indexed)
* Gets a single packet from the packet table. Takes the index
* of the packet (with 0 being the first packet) and a pointer
* to memory where the data should be stored.
* Returns 0 on success, negative on failure
*/
int GetPacket(unsigned int index, void * data);
/* GetPackets (multiple packets)
* Gets multiple packets at once, all packets between
* startIndex and endIndex inclusive. Also takes a pointer to
* the memory where these packets should be stored.
* Returns 0 on success, negative on failure.
*/
int GetPackets(unsigned int startIndex, unsigned int endIndex, void * data);
/* GetNextPacket (single packet)
* Gets the next packet in the packet table. Takes a pointer to
* memory where the packet should be stored.
* Returns 0 on success, negative on failure. Index
* is not advanced to the next packet on failure.
*/
int GetNextPacket(void * data);
/* GetNextPackets (multiple packets)
* Gets the next numPackets packets in the packet table. Takes a
* pointer to memory where these packets should be stored.
* Returns 0 on success, negative on failure. Index
* is not advanced on failure.
*/
int GetNextPackets(unsigned int numPackets, void * data);
};
class H5_HLCPPDLL VL_PacketTable : virtual public PacketTable
{
public:
/* Constructor
* Creates a packet table in which to store variable length packets.
* 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(hid_t fileID, char* name, int chunkSize);
/* "Open" Constructor
* Opens an existing variable-length packet table.
* Fails if the packet table specified is fixed-length.
*/
VL_PacketTable(hid_t fileID, char* name);
/* AppendPacket
* Adds a single packet of any length 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 AppendPacket(void * data, unsigned int length);
/* AppendPackets (multiple packets)
* Adds multiple variable-length packets to the packet table. Takes the
* number of packets to be added and a pointer to an array of
* hvl_t structs in memory.
* Returns 0 on success, negative on failure.
*/
int AppendPackets(unsigned int numPackets, hvl_t * data);
/* GetPacket (indexed)
* Gets a single variable-length packet from the packet table. Takes
* the index of the packet (with 0 being the first packet) and a pointer
* to a hvl_t struct in which to store the packet's size and location.
* Returns 0 on success, negative on failure.
*/
int GetPacket(unsigned int index, hvl_t * data);
/* GetPackets (multiple packets)
* Gets multiple variable-length packets at once, all packets between
* startIndex and endIndex inclusive. Takes a pointer to an array
* of hvl_t structs in memory in which to store pointers to the packets.
* Returns 0 on success, negative on failure.
*/
int GetPackets(unsigned int startIndex, unsigned int endIndex, hvl_t * data);
/* GetNextPacket (single packet)
* Gets the next packet in the packet table. Takes a pointer to
* an hvl_t struct where the packet should be stored.
* Returns 0 on success, negative on failure. Index
* is not advanced to the next packet on failure.
*/
int GetNextPacket(hvl_t * data);
/* GetNextPackets (multiple packets)
* Gets the next numPackets packets in the packet table. Takes a
* pointer to an array of hvl_t structs where pointers to the packets
* should be stored.
* Returns 0 on success, negative on failure. Index
* is not advanced on failure.
*/
int GetNextPackets(unsigned int numPackets, hvl_t * data);
/* FreeReadbuff
* Frees the buffers created when variable-length packets 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 FreeReadbuff(unsigned int numStructs, hvl_t * buffer);
};
#endif /* H5PTWRAP_H */
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