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Update project so it compiles
[rbdr/pico-engine] / LuaThis.h
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1// ---------------------------------------------------------------------------\r
2// FILE NAME : LuaThis.h\r
3// ---------------------------------------------------------------------------\r
4// DESCRIPTION :\r
5//\r
6// Controls the "this" table\r
7// \r
8// ---------------------------------------------------------------------------\r
9// VERSION : 1.01\r
10// DATE : 1-Sep-2005\r
11// AUTHOR : Richard Shephard\r
12// ---------------------------------------------------------------------------\r
13// LIBRARY INCLUDE FILES\r
14#ifndef __LUA_THIS_H__\r
15#define __LUA_THIS_H__\r
16\r
17#include "luainc.h"\r
18#include "luavirtualmachine.h"\r
19\r
20// Sets the "this" global table that scripts use\r
21\r
22class CLuaThis\r
23{\r
24public:\r
25 CLuaThis (CLuaVirtualMachine& vm, int iRef) : m_iOldRef (0), m_vm (vm)\r
26 {\r
27 lua_State *state = (lua_State *) vm;\r
28 if (vm.Ok ())\r
29 {\r
30 // Save the old "this" table\r
31 lua_getglobal (state, "this");\r
32 m_iOldRef = luaL_ref (state, LUA_REGISTRYINDEX);\r
33\r
34 // replace it with our new one\r
35 lua_rawgeti(state, LUA_REGISTRYINDEX, iRef);\r
36 lua_setglobal (state, "this");\r
37 }\r
38 }\r
39\r
40 virtual ~CLuaThis (void)\r
41 {\r
42 lua_State *state = (lua_State *) m_vm;\r
43 if (m_iOldRef > 0 && m_vm.Ok ())\r
44 {\r
45 // Replace the old "this" table\r
46 lua_rawgeti(state, LUA_REGISTRYINDEX, m_iOldRef);\r
47 lua_setglobal (state, "this");\r
48 luaL_unref (state, LUA_REGISTRYINDEX, m_iOldRef);\r
49 }\r
50 }\r
51\r
52\r
53protected:\r
54 int m_iOldRef;\r
55 CLuaVirtualMachine& m_vm;\r
56};\r
57\r
58#endif // __LUA_THIS_H__