1 files changed, 212 insertions, 0 deletions
diff --git a/hl/c++/src/H5PacketTable.h b/hl/c++/src/H5PacketTable.h
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+++ b/hl/c++/src/H5PacketTable.h
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+/* 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 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 records.
+     */
+    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 record" to the first record in the packet table
+     */
+    void ResetIndex();
+
+    /* 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 SetIndex(unsigned int 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 GetPacketCount(int& error);
+
+    unsigned int GetPacketCount()
+    {
+        int ignoreError;
+        return GetPacketCount(ignoreError);
+    }
+
+protected:
+    hid_t table_id;
+};
+
+class FL_PacketTable : virtual public PacketTable
+{
+public:
+    /* 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(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 records)
+     * 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 AppendPackets(unsigned int numRecords, void * 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 GetPacket(unsigned int index, void * data);
+
+    /* GetPackets (multiple records)
+     * 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 GetPackets(unsigned int startIndex, unsigned int endIndex, void * data);
+
+    /* GetNextPacket (single record)
+     * 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 GetNextPacket(void * data);
+
+    /* GetNextPackets (multiple records)
+     * 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 GetNextPackets(unsigned int numRecords, void * data);
+};
+
+class VL_PacketTable : virtual public PacketTable
+{
+public:
+    /* 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(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 records)
+     * 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 AppendPackets(unsigned int numRecords, hvl_t * 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 GetPacket(unsigned int index, hvl_t * data);
+
+    /* GetPackets (multiple records)
+     * 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 GetPackets(unsigned int startIndex, unsigned int endIndex, hvl_t * data);
+
+    /* GetNextPacket (single record)
+     * 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 GetNextPacket(hvl_t * data);
+
+    /* GetNextPackets (multiple records)
+     * 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 GetNextPackets(unsigned int numRecords, hvl_t * 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 FreeReadbuff(unsigned int numStructs, hvl_t * buffer);
+};
+
+#endif /* H5PTWRAP_H */