public BootGodDb(string basePath)
{
// notes: there can be multiple each of prg,chr,wram,vram
// we aren't tracking the individual hashes yet.
string xmlPath = Path.Combine(basePath, "NesCarts.xml");
string x7zPath = Path.Combine(basePath, "NesCarts.7z");
bool loadXml = File.Exists(xmlPath);
using var nesCartFile = new HawkFile(loadXml ? xmlPath : x7zPath);
if (!loadXml)
{
nesCartFile.BindFirst();
}
var stream = nesCartFile.GetStream();
// in anticipation of any slowness annoying people, and just for shits and giggles, i made a super fast parser
int state = 0;
var xmlReader = XmlReader.Create(stream);
CartInfo currCart = null;
string currName = null;
while (xmlReader.Read())
{
switch (state)
{
case 0:
if (xmlReader.NodeType == XmlNodeType.Element && xmlReader.Name == "game")
{
currName = xmlReader.GetAttribute("name");
state = 1;
}
break;
case 2:
if (xmlReader.NodeType == XmlNodeType.Element && xmlReader.Name == "board")
{
currCart.BoardType = xmlReader.GetAttribute("type");
currCart.Pcb = xmlReader.GetAttribute("pcb");
int mapper = int.Parse(xmlReader.GetAttribute("mapper"));
if (validate && mapper > 255)
{
throw new Exception("didnt expect mapper>255!");
}
// we don't actually use this value at all; only the board name
state = 3;
}
break;
case 3:
if (xmlReader.NodeType == XmlNodeType.Element)
{
switch (xmlReader.Name)
{
case "prg":
currCart.PrgSize += (short)ParseSize(xmlReader.GetAttribute("size"));
break;
case "chr":
currCart.ChrSize += (short)ParseSize(xmlReader.GetAttribute("size"));
break;
case "vram":
currCart.VramSize += (short)ParseSize(xmlReader.GetAttribute("size"));
break;
case "wram":
currCart.WramSize += (short)ParseSize(xmlReader.GetAttribute("size"));
if (xmlReader.GetAttribute("battery") != null)
{
currCart.WramBattery = true;
}
break;
case "pad":
currCart.PadH = byte.Parse(xmlReader.GetAttribute("h"));
currCart.PadV = byte.Parse(xmlReader.GetAttribute("v"));
break;
case "chip":
currCart.Chips.Add(xmlReader.GetAttribute("type"));
if (xmlReader.GetAttribute("battery") != null)
{
currCart.WramBattery = true;
}
break;
}
}
else
if (xmlReader.NodeType == XmlNodeType.EndElement && xmlReader.Name == "board")
{
state = 4;
}
break;
case 4:
if (xmlReader.NodeType == XmlNodeType.EndElement && xmlReader.Name == "cartridge")
{
_sha1Table[currCart.Sha1].Add(currCart);
currCart = null;
state = 5;
}
break;
case 5:
case 1:
if (xmlReader.NodeType == XmlNodeType.Element && xmlReader.Name == "cartridge")
{
currCart = new CartInfo();
currCart.System = xmlReader.GetAttribute("system");
currCart.Sha1 = "sha1:" + xmlReader.GetAttribute("sha1");
currCart.Name = currName;
state = 2;
}
if (xmlReader.NodeType == XmlNodeType.EndElement && xmlReader.Name == "game")
{
currName = null;
state = 0;
}
break;
}
} //end xmlreader loop
}