//---------------------------------------------------------------------------
int32_t PacketFile::afterOpen(void)
{
if(!numPackets && getLength() >= 12)
{
int32_t firstPacketOffset;
int32_t firstCheck = readLong();
if(firstCheck == PACKET_FILE_VERSION && !usesCheckSum)
{
}
else
{
//---------------------------------------
// This is probably a checksum. Check it
int32_t checkSum = checkSumFile();
if(checkSum != firstCheck)
return PACKET_OUT_OF_RANGE;
}
firstPacketOffset = readLong();
numPackets = (firstPacketOffset / sizeof(int32_t)) - 2;
}
currentPacket = -1;
if(fileMode == READ || fileMode == RDWRITE)
{
if(numPackets && !seekTable)
{
seekTable = (int32_t*)systemHeap->Malloc(numPackets * sizeof(int32_t));
gosASSERT(seekTable != nullptr);
seek(sizeof(int32_t) * 2); //File Version & File Length
read(puint8_t(seekTable), (numPackets * sizeof(int32_t)));
}
}
return(NO_ERROR);
}
//---------------------------------------------------------------------------
void PacketFile::atClose(void)
{
if(isOpen() && fileMode != READ) // update filesize
{
int32_t endPtr = getLength();
//seek(sizeof(int32_t)); //Move Past Version Marker
//writeLong(endPtr); //Write File length
int32_t tableEntry;
currentPacket = numPackets;
if(!seekTable)
{
while(--currentPacket >= 0)
{
seek(TABLE_ENTRY(currentPacket));
tableEntry = readLong();
if(GetPacketType(tableEntry) == STORAGE_TYPE_NUL)
{
seek(TABLE_ENTRY(currentPacket));
writeLong(SetPacketType(endPtr, STORAGE_TYPE_NUL));
}
else
{
endPtr = GetPacketOffset(tableEntry);
}
}
}
else
{
while(--currentPacket >= 0)
{
tableEntry = seekTable[currentPacket];
if(GetPacketType(tableEntry) == STORAGE_TYPE_NUL)
{
seekTable[currentPacket] = SetPacketType(endPtr, STORAGE_TYPE_NUL);
}
else
{
endPtr = GetPacketOffset(tableEntry);
}
}
}
//-----------------------------------------------------
// If seekTable was being used, write it back to file
if(seekTable)
{
seek(sizeof(int32_t) * 2); //File Version & File Length
write(puint8_t(seekTable), (numPackets * sizeof(int32_t)));
}
//------------------------------------------------------
// Is we were using a checkSum, calc it and write it to
// the beginning of the file.
if(usesCheckSum)
{
int32_t checkSum = checkSumFile();
seek(0);
writeLong(checkSum);
}
}
clear();
}
//---------------------------------------------------------------------------
long PacketFile::afterOpen (void)
{
if (!numPackets && getLength() >= 12)
{
long firstPacketOffset;
long firstCheck = readLong();
if (firstCheck == PACKET_FILE_VERSION && !usesCheckSum)
{
}
else
{
//---------------------------------------
// This is probably a checksum. Check it
long checkSum = checkSumFile();
if (checkSum != firstCheck)
return PACKET_OUT_OF_RANGE;
}
firstPacketOffset = readLong();
numPackets = (firstPacketOffset/sizeof(long))-2;
}
currentPacket = -1;
if (fileMode == READ || fileMode == RDWRITE)
{
if (numPackets && !seekTable)
{
//seekTable = (long *)systemHeap->Malloc(numPackets * sizeof(long));
seekTable = new long[numPackets]; //magic 02102011
gosASSERT(seekTable != NULL);
seek(sizeof(long)*2); //File Version & File Length
read(MemoryPtr(seekTable),(numPackets*sizeof(long)));
}
}
return(NO_ERR);
}
