Function joypad_set

src/lua-engine.cpp:2901–2938

joypad.set(int which, table buttons) Sets the given buttons to be pressed during the next frame advance. The table should have the right keys (no pun intended) set. FatRatKnight: I changed some of the logic. Now with 4 options!*/

/*FatRatKnight: I changed some of the logic.
  Now with 4 options!*/
static int joypad_set(lua_State *L) {

	// Which joypad we're tampering with
	int which = luaL_checkinteger(L,1);
	if (which < 1 || which > 4) {
		luaL_error(L,"Invalid output port (valid range 1-4, specified %d)", which);

	}

	// And the table of buttons.
	luaL_checktype(L,2,LUA_TTABLE);

	// Set up for taking control of the indicated controller
	luajoypads1[which-1] = 0xFF; // .1  Reset right bit
	luajoypads2[which-1] = 0x00; // 0.  Reset left bit

	int i;
	for (i=0; i < 8; i++) {
		lua_getfield(L, 2, button_mappings[i]);

		//Button is not nil, so find out if it is true/false
		if (!lua_isnil(L,-1))
		{
			if (lua_toboolean(L,-1))							//True or string
				luajoypads2[which-1] |= 1 << i;
			if (lua_toboolean(L,-1) == 0 || lua_isstring(L,-1))	//False or string
				luajoypads1[which-1] &= ~(1 << i);
		}

		else
		{

		}
		lua_pop(L,1);
	}

	return 0;
}

// Helper function to convert a savestate object to the filename it represents.
static const char *savestateobj2filename(lua_State *L, int offset) {