git.r.bdr.sh / rbdr / pico-engine / blame
| Commit | Line | Data |
|---|---|---|
| 10a0e290 BB |
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 | |
| 22 | class CLuaThis\r | |
| 23 | {\r | |
| 24 | public:\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 | |
| 53 | protected:\r | |
| 54 | int m_iOldRef;\r | |
| 55 | CLuaVirtualMachine& m_vm;\r | |
| 56 | };\r | |
| 57 | \r | |
| 58 | #endif // __LUA_THIS_H__ |