Lunatic: fix one stack index, comment on a problem with ffi.C access.

git-svn-id: https://svn.eduke32.com/eduke32@2710 1a8010ca-5511-0410-912e-c29ae57300e0

polymer/eduke32/source/lunatic/defs.ilua

@@ -452,7 +452,7 @@ local function printkv(label, table)
     print('----------')
 end
 
-printkv('_G AFTER SETFENV', _G)
+--printkv('_G AFTER SETFENV', _G)
 
 
 ---=== Restricted access to C variables from Lunatic ===---
@@ -469,6 +469,7 @@ local tmpmt = {
 }
 oG.setmetatable(det, tmpmt)
 
+-- XXX: this is incorrect -- ffi.C also contains C library functions, etc.
 -- GLOBAL gv: provides access to C global *scalars*
 gv = {
     -- all non-scalars need to be explicitly listed
@@ -486,8 +487,8 @@ gv = {
     actor = det,
     ud = det,
 
-    luaJIT_BC_con_lang,
-    luaJIT_BC_lunacon,
+    luaJIT_BC_con_lang = det,
+    luaJIT_BC_lunacon = det,
 }
 local tmpmt = {
     __index = ffiC,
@@ -740,7 +741,7 @@ DBG_.loadGamevarsString = loadGamevarsString
 
 ---=== Finishing environment setup ===---
 
-printkv('_G AFTER DECLS', _G)
+--printkv('_G AFTER DECLS', _G)
 
 
 -- PiL 14.2 continued

polymer/eduke32/source/lunatic/lunatic.c

@@ -111,7 +111,7 @@ int32_t El_RunOnce(El_State *estate, const char *fn)
 
     if (i == LUA_ERRSYNTAX)
     {
-        OSD_Printf("state \"%s\" syntax error: %s\n", estate->name, lua_tostring(estate->L, 1));  // get err msg
+        OSD_Printf("state \"%s\" syntax error: %s\n", estate->name, lua_tostring(estate->L, -1));  // get err msg
         lua_pop(estate->L, 1);
         return 3;
     }

polymer/eduke32/source/lunatic/test.elua

@@ -84,7 +84,7 @@ if (vol==1 and lev==8) then
 end
 
 --]]
-DBG_.printkv('_G in test.elua', _G)
+--DBG_.printkv('_G in test.elua', _G)
 
 checkfail('print(sprite[100000].ceilingpal)')  -- oob read access
 checkfail('setmetatable(sprite, {})')  -- set metatable forbidden
@@ -102,6 +102,12 @@ checkfail("new_global = 345")  -- we should declare globals
 checkfail('gv.CEILING = 3')  -- can't redefine constants in 'gv'
 checkfail('string.dump(setevent)')  -- string.dump is unavailable
 
+-- This is problematic, even though pretty much every access will yield a
+-- "missing declaration" error.
+-- See http://luajit.org/ext_ffi_api.html#ffi_C about what stuff ffi.C contains.
+checkfail('gv.luaJIT_setmode(nil, 0, 0)')
+
 setevent(gv.EVENT_JUMP, function() print("jump!") end)
 
+
 print('---=== END TEST SCRIPT ===---')