public static bool TryGetOffset(string addrVar, RomVersion version, out int v)
{
Block block;
v = 0;
if (!TryGetBlock(version, addrVar, out block))
{
return(false);
}
var lookupAddr = block.Identifier.SingleOrDefault(x => x.id == addrVar);
if (!(lookupAddr.Item.Count > 0 && lookupAddr.Item[0] is Offset))
{
return(false);
}
var lookupSet = lookupAddr.Item.Cast <Offset>().ToList();
var group = version.GetGroup();
Offset offset = lookupSet.SingleOrDefault(x => x.id == version.GetGroup());
if (offset == null && group != null)
{
offset = lookupSet.SingleOrDefault(x => x.id == null);
}
if (offset == null)
{
return(false);
}
if (!TryGetOffsetValue(offset, out v))
{
return(false);
}
return(true);
}
private static bool TryMagicConverter(Block block, string ident, RomVersion version, Domain domain, out int result)
{
int lookup;
result = 0;
lookup = 0;
var lookupAddr = block.Identifier.SingleOrDefault(x => x.id == ident);
if (lookupAddr == null)
{
return(false);
}
if (lookupAddr.Item.Count > 0 && lookupAddr.Item[0] is Addr)
{
Addr addr = (Addr)lookupAddr.Item[0];
if (!TryGetAddrValue(addr, version, out lookup))
{
return(false);
}
//if lookup is absolute, and in the same space, we have it
if (addr.reftype == AddressType.absolute &&
addr.domain == domain)
{
result = lookup;
return(true);
}
//if lookup is absolute, but not in the same space, convert to offset
if (addr.reftype == AddressType.absolute && addr.domain != domain)
{
Addr altStartAddr;
altStartAddr = block.Start.SingleOrDefault(x => x.domain == addr.domain);
if (altStartAddr == null ||
!TryGetAddrValue(altStartAddr, version, out int altStart))
{
return(false);
}
lookup -= altStart;
}
}
else if (lookupAddr.Item.Count > 0 && lookupAddr.Item[0] is Offset)
{
var lookupSet = lookupAddr.Item.Cast <Offset>().ToList();
Offset offset = lookupSet.SingleOrDefault(x => x.id == version.GetGroup());
if (offset == null)
{
return(false);
}
if (!TryGetOffsetValue(offset, out lookup))
{
return(false);
}
}
if (!TryGetStart(block, version, domain, out int start))
{
return(false);
}
result = start + lookup;
return(true);
}