Glenn Maynard
122 lines
4.6 KiB
C++
122 lines
4.6 KiB
C++
#ifndef LUA_MANAGER_H
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#define LUA_MANAGER_H
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struct lua_State;
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typedef void (*RegisterWithLuaFn)(lua_State*);
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class LuaManager
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{
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public:
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// Every Actor should register its class at program initialization.
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static void Register( RegisterWithLuaFn pfn );
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LuaManager();
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~LuaManager();
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void PrepareExpression( CString &sInOut ); // strip "//" comments and "+"
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bool RunScriptFile( const CString &sFile );
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/* Register all subscribing types. There's no harm in registering when already registered. */
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void RegisterTypes();
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/* Reset the environment, freeing any globals left over by previously executed scripts. */
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void ResetState();
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/* Run a script with the given name. Return values are left on the Lua stack.
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* Returns false on error, with sError set*/
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bool RunScript( const CString &sScript, const CString &sName, CString &sError, int iReturnValues = 0 );
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/* Convenience: run a script with one return value, displaying an error on failure.
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* The return value is left on the Lua stack. */
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bool RunScript( const CString &sExpression, const CString &sName = "", int iReturnValues = 0 );
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/* Run an expression in the global environment, returning the given type. */
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bool RunExpressionB( const CString &str );
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float RunExpressionF( const CString &str );
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int RunExpressionI( const CString &str );
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bool RunExpressionS( const CString &str, CString &sOut );
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/* If sStr begins with @, evaluate the rest as an expression and store the result over sStr. */
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bool RunAtExpressionS( CString &sStr );
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float RunAtExpressionF( const CString &sStr );
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void Fail( const CString &err );
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void SetGlobal( const CString &sName, int val ) { PushStack(val); SetGlobal( sName ); }
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void SetGlobal( const CString &sName, bool val ) { PushStack(val); SetGlobal( sName ); }
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void UnsetGlobal( const CString &sName ) { PushStackNil(); SetGlobal( sName ); }
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// XXX: yuck
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void PushStackNil();
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void PushNopFunction();
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static void PushStack( bool val, lua_State *L = NULL );
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static void PushStack( float val, lua_State *L = NULL );
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static void PushStack( int val, lua_State *L = NULL );
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static void PushStack( void *val, lua_State *L = NULL );
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static void PushStack( const CString &val, lua_State *L = NULL );
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static bool PopStack( bool &val, lua_State *L = NULL );
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static bool PopStack( float &val, lua_State *L = NULL );
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static bool PopStack( int &val, lua_State *L = NULL );
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static bool PopStack( void *&val, lua_State *L = NULL );
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static bool PopStack( CString &val, lua_State *L = NULL );
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bool GetStack( int pos, int &out );
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void SetGlobal( const CString &sName );
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/* Create a Lua array (a table with indices starting at 1) of the given vector,
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* and push it on the stack. */
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static void CreateTableFromArrayB( const vector<bool> &aIn, lua_State *L = NULL );
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/* Read the table at the top of the stack back into a vector. */
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static void ReadArrayFromTableB( vector<bool> &aOut, lua_State *L = NULL );
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lua_State *L;
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};
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template<class T>
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void CreateTableFromArray( const vector<T> &aIn, lua_State *L )
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{
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if( L == NULL )
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L = LUA->L;
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lua_newtable( L );
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for( unsigned i = 0; i < aIn.size(); ++i )
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{
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aIn[i]->PushSelf( L );
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lua_rawseti( L, -2, i+1 );
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}
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}
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extern LuaManager *LUA;
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#define REGISTER_WITH_LUA_FUNCTION( Fn ) \
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class Register##Fn { public: Register##Fn() { LuaManager::Register( Fn ); } }; \
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static Register##Fn register##Fn;
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#endif
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/*
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* (c) 2004 Glenn Maynard
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, and/or sell copies of the Software, and to permit persons to
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* whom the Software is furnished to do so, provided that the above
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* copyright notice(s) and this permission notice appear in all copies of
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* the Software and that both the above copyright notice(s) and this
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* permission notice appear in supporting documentation.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
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* THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
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* INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
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* OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
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* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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