Lua_tostring weirdness
- From: rob <rob.mail@xxxxxxxxxxx>
- To: luajit@xxxxxxxxxxxxx
- Date: Tue, 07 Aug 2012 13:20:59 +0200
Hi,
Using Lua, lua_tostring returns string pointers and a null pointer if
the given index in the stack does not exist, e.g. -1 when a registered C
function passes no arguments from Lua.
However, as I have found out the hard way, LuaJit seems to always return
a valid pointer, thus now even without passed arguments I have things
like '1.2282043745381e-306', resulting in a memory access error in my
function.
Is there a way to check if a given stack index is empty, i.e. there is
no passed value, or have a null pointer returned?
Rob
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