dfhack/plugins/Dfusion/luafiles/onfunction/init.lua

62 lines
1.7 KiB
Lua

onfunction=onfunction or {}
function onfunction.install()
ModData=engine.installMod("dfusion/onfunction/functions.o","functions",4)
modpos=ModData.pos
modsize=ModData.size
onfunction.pos=modpos
trgpos=engine.getpushvalue()
print(string.format("Function installed in:%x function to call is: %x",modpos,trgpos))
local firstpos=modpos+engine.FindMarker(ModData,"function")
engine.poked(firstpos,trgpos-firstpos-4) --call Lua-Onfunction
onfunction.fpos=modpos+engine.FindMarker(ModData,"function3")
engine.poked(modpos+engine.FindMarker(ModData,"function2"),modpos+modsize)
engine.poked(onfunction.fpos,modpos+modsize)
SetExecute(modpos)
onfunction.calls={}
onfunction.functions={}
onfunction.names={}
onfunction.hints={}
end
function OnFunction(values)
--[=[print("Onfunction called!")
print("Data:")
for k,v in pairs(values) do
print(string.format("%s=%x",k,v))
end
print("stack:")
for i=0,3 do
print(string.format("%d %x",i,engine.peekd(values.esp+i*4)))
end
--]=]
if onfunction.functions[values.ret] ~=nil then
onfunction.functions[values.ret](values)
end
return onfunction.calls[values.ret] --returns real function to call
end
function onfunction.patch(addr)
if(engine.peekb(addr)~=0xe8) then
error("Incorrect address, not a function call")
else
onfunction.calls[addr+5]=addr+engine.peekd(addr+1)+5 --adds real function to call
engine.poked(addr+1,engine.getmod("functions")-addr-5)
end
end
function onfunction.AddFunction(addr,name,hints)
onfunction.patch(addr)
onfunction.names[name]=addr+5
if hints~=nil then
onfunction.hints[name]=hints
end
end
function onfunction.SetCallback(name,func)
if onfunction.names[name]==nil then
error("No such function:"..name)
else
onfunction.functions[onfunction.names[name]]=func
end
end