Merge pull request #330 from c4games/lua54-compat

Lua 5.4 compatible

extensions/scripting/lua-bindings/script/init.lua

@@ -22,6 +22,12 @@ THE SOFTWARE.
 
 ]]
 
+if (math.pow == nil) then
+    math.pow = function (x,y)
+        return x ^ y
+    end
+end
+
 require "cocos.cocos2d.Cocos2d"
 require "cocos.cocos2d.Cocos2dConstants"
 require "cocos.cocos2d.functions"

external/lua/tolua/tolua++.h

@@ -57,6 +57,16 @@ typedef int lua_Object;
 #endif
 #endif
 
+#if LUA_VERSION_NUM >= 504
+TOLUA_API const char* luaL_findtable(lua_State* L, int idx,
+    const char* fname, int szhint);
+TOLUA_API void luaL_pushmodule(lua_State* L, const char* modname,
+    int sizehint);
+TOLUA_API void luaL_openlib(lua_State* L, const char* libname,
+    const luaL_Reg* l, int nup);
+#define luaL_register(L,n,l)	(luaL_openlib(L,(n),(l),0))
+#endif
+
 struct tolua_Error
 {
     int index;

external/lua/tolua/tolua_to.c

@@ -17,6 +17,67 @@
 #include <string.h>
 #include <stdlib.h>
 
+#if LUA_VERSION_NUM >= 504
+static int libsize(const luaL_Reg* l) {
+    int size = 0;
+    for (; l && l->name; l++) size++;
+    return size;
+}
+
+TOLUA_API const char* luaL_findtable(lua_State* L, int idx,
+    const char* fname, int szhint) {
+    const char* e;
+    if (idx) lua_pushvalue(L, idx);
+    do {
+        e = strchr(fname, '.');
+        if (e == NULL) e = fname + strlen(fname);
+        lua_pushlstring(L, fname, e - fname);
+        if (lua_rawget(L, -2) == LUA_TNIL) {  /* no such field? */
+            lua_pop(L, 1);  /* remove this nil */
+            lua_createtable(L, 0, (*e == '.' ? 1 : szhint)); /* new table for field */
+            lua_pushlstring(L, fname, e - fname);
+            lua_pushvalue(L, -2);
+            lua_settable(L, -4);  /* set new table into field */
+        }
+        else if (!lua_istable(L, -1)) {  /* field has a non-table value? */
+            lua_pop(L, 2);  /* remove table and value */
+            return fname;  /* return problematic part of the name */
+        }
+        lua_remove(L, -2);  /* remove previous table */
+        fname = e + 1;
+    } while (*e == '.');
+    return NULL;
+}
+
+TOLUA_API void luaL_pushmodule(lua_State* L, const char* modname,
+    int sizehint) {
+    luaL_findtable(L, LUA_REGISTRYINDEX, LUA_LOADED_TABLE, 1);
+    if (lua_getfield(L, -1, modname) != LUA_TTABLE) {  /* no LOADED[modname]? */
+        lua_pop(L, 1);  /* remove previous result */
+        /* try global variable (and create one if it does not exist) */
+        lua_pushglobaltable(L);
+        if (luaL_findtable(L, 0, modname, sizehint) != NULL)
+            luaL_error(L, "name conflict for module '%s'", modname);
+        lua_pushvalue(L, -1);
+        lua_setfield(L, -3, modname);  /* LOADED[modname] = new table */
+    }
+    lua_remove(L, -2);  /* remove LOADED table */
+}
+
+TOLUA_API void luaL_openlib(lua_State* L, const char* libname,
+    const luaL_Reg* l, int nup) {
+    luaL_checkversion(L);
+    if (libname) {
+        luaL_pushmodule(L, libname, libsize(l));  /* get/create library table */
+        lua_insert(L, -(nup + 1));  /* move library table to below upvalues */
+    }
+    if (l)
+        luaL_setfuncs(L, l, nup);
+    else
+        lua_pop(L, nup);  /* remove upvalues */
+}
+#endif
+
 TOLUA_API lua_Number tolua_tonumber (lua_State* L, int narg, lua_Number def)
 {
     return lua_gettop(L)<abs(narg) ? def : lua_tonumber(L,narg);