public Item(byte[] itemData)
{
if (!IsPacketData && itemData[0] != 'J' && itemData[1] != 'M')
{
throw new Exception("Item data missing JM header");
}
if(IsPacketData && itemData[0] != 0x9c && itemData[0] != 0x9d)
{
throw new Exception("Attempting to parse a non-item packet!");
}
bs = new BitStream(itemData);
if (!IsPacketData)
{
// Skip 'JM' Header
bs.SkipBits(16);
}
ReadItemData();
ReadRemainingBits();
}
/// <summary>
/// Parses raw character stat data
/// </summary>
/// <param name="headerBytes">Raw characte stat data found between "gf" and "if" near offset 765 in save file</param>
/// <remarks>Bit lengths of stat types are found in the CSvBits column of ItemStatCost.txt</remarks>
/// Source: http://phrozenkeep.hugelaser.com/forum/viewtopic.php?f=8&t=9011&start=50
private void ReadStats()
{
BitStream bs = new BitStream(statsBytes);
// Skip header bytes
bs.SkipBits(8);
bs.SkipBits(8);
while (bs.RemainingBits >= 9)
{
// ID of stat (See ItemStatCost.txt)
int statIndex = (int)bs.ReadReversed(9);
// Value contains this many bits (See CSvBits in ItemStatCost.txt)
int statValueBits = 0;
// Value needs to be shifted by this amount
int valShift = 0;
// Terminating stat index
if (statIndex == 0x1ff)
{
break;
}
statValueBits = ItemDefs.ItemStatCostsById[statIndex].CSvBits;
if (statValueBits == 0)
{
break;
}
valShift = ItemDefs.ItemStatCostsById[(int)statIndex].ValShift;
int statValue = (int)bs.ReadReversed(statValueBits);
if (!statValues.ContainsKey(statIndex))
{
statValues.Add(statIndex, (statValue >> valShift));
}
}
}
