// Hook for linedef executors
boolean LUAh_LinedefExecute(line_t *line, mobj_t *mo, sector_t *sector)
{
hook_p hookp;
boolean hooked = false;
if (!gL || !(hooksAvailable[hook_LinedefExecute/8] & (1<<(hook_LinedefExecute%8))))
return 0;
lua_settop(gL, 0);
for (hookp = roothook; hookp; hookp = hookp->next)
if (hookp->type == hook_LinedefExecute
&& !strcmp(hookp->s.funcname, line->text))
{
if (lua_gettop(gL) == 0)
{
LUA_PushUserdata(gL, line, META_LINE);
LUA_PushUserdata(gL, mo, META_MOBJ);
LUA_PushUserdata(gL, sector, META_SECTOR);
}
lua_pushfstring(gL, FMT_HOOKID, hookp->id);
lua_gettable(gL, LUA_REGISTRYINDEX);
lua_pushvalue(gL, -4);
lua_pushvalue(gL, -4);
lua_pushvalue(gL, -4);
LUA_Call(gL, 3);
hooked = true;
}
lua_settop(gL, 0);
return hooked;
}
void LUAh_NetArchiveHook(lua_CFunction archFunc)
{
hook_p hookp;
if (!gL || !(hooksAvailable[hook_NetVars/8] & (1<<(hook_NetVars%8))))
return;
// stack: tables
I_Assert(lua_gettop(gL) > 0);
I_Assert(lua_istable(gL, -1));
// tables becomes an upvalue of archFunc
lua_pushvalue(gL, -1);
lua_pushcclosure(gL, archFunc, 1);
// stack: tables, archFunc
for (hookp = roothook; hookp; hookp = hookp->next)
if (hookp->type == hook_NetVars)
{
lua_pushfstring(gL, FMT_HOOKID, hookp->id);
lua_gettable(gL, LUA_REGISTRYINDEX);
lua_pushvalue(gL, -2); // archFunc
LUA_Call(gL, 1);
}
lua_pop(gL, 1); // pop archFunc
// stack: tables
}
void LUAh_ScoresHUD(void)
{
if (!gL || !(hudAvailable & (1<<hudhook_scores)))
return;
hud_running = true;
lua_pop(gL, -1);
lua_getfield(gL, LUA_REGISTRYINDEX, "HUD");
I_Assert(lua_istable(gL, -1));
lua_rawgeti(gL, -1, 3); // HUD[3] = rendering funcs
I_Assert(lua_istable(gL, -1));
lua_rawgeti(gL, -2, 1); // HUD[1] = lib_draw
I_Assert(lua_istable(gL, -1));
lua_remove(gL, -3); // pop HUD
lua_pushnil(gL);
while (lua_next(gL, -3) != 0) {
lua_pushvalue(gL, -3); // graphics library (HUD[1])
LUA_Call(gL, 1);
}
lua_pop(gL, -1);
lua_gc(gL, LUA_GCCOLLECT, 0);
hud_running = false;
}
// Hook for HUD rendering
void LUAh_GameHUD(player_t *stplyr)
{
if (!gL || !(hudAvailable & (1<<hudhook_game)))
return;
hud_running = true;
lua_pop(gL, -1);
lua_getfield(gL, LUA_REGISTRYINDEX, "HUD");
I_Assert(lua_istable(gL, -1));
lua_rawgeti(gL, -1, 2); // HUD[2] = rendering funcs
I_Assert(lua_istable(gL, -1));
lua_rawgeti(gL, -2, 1); // HUD[1] = lib_draw
I_Assert(lua_istable(gL, -1));
lua_remove(gL, -3); // pop HUD
LUA_PushUserdata(gL, stplyr, META_PLAYER);
lua_pushnil(gL);
while (lua_next(gL, -4) != 0) {
lua_pushvalue(gL, -4); // graphics library (HUD[1])
lua_pushvalue(gL, -4); // stplyr
LUA_Call(gL, 2);
}
lua_pop(gL, -1);
lua_gc(gL, LUA_GCCOLLECT, 0);
hud_running = false;
}
boolean LUA_CallAction(const char *csaction, mobj_t *actor)
{
I_Assert(csaction != NULL);
I_Assert(actor != NULL);
if (!gL) // Lua isn't loaded,
return false; // action not called.
if (superstack && fasticmp(csaction, superactions[superstack-1])) // the action is calling itself,
return false; // let it call the hardcoded function instead.
// grab function by uppercase name.
lua_getfield(gL, LUA_REGISTRYINDEX, LREG_ACTIONS);
{
char *action = Z_StrDup(csaction);
strupr(action);
lua_getfield(gL, -1, action);
Z_Free(action);
}
lua_remove(gL, -2); // pop LREG_ACTIONS
if (lua_isnil(gL, -1)) // no match
{
lua_pop(gL, 1); // pop nil
return false; // action not called.
}
if (superstack == MAXRECURSION)
{
CONS_Alert(CONS_WARNING, "Max Lua Action recursion reached! Cool it on the calling A_Action functions from inside A_Action functions!\n");
return true;
}
// Found a function.
// Call it with (actor, var1, var2)
I_Assert(lua_isfunction(gL, -1));
LUA_PushUserdata(gL, actor, META_MOBJ);
lua_pushinteger(gL, var1);
lua_pushinteger(gL, var2);
superactions[superstack] = csaction;
++superstack;
LUA_Call(gL, 3);
--superstack;
superactions[superstack] = NULL;
return true; // action successfully called.
}
// Uses astate to determine which state is calling it
// Then looks up which Lua action is assigned to that state and calls it
static void A_Lua(mobj_t *actor)
{
boolean found = false;
I_Assert(actor != NULL);
// get the action for this state
lua_getfield(gL, LUA_REGISTRYINDEX, LREG_STATEACTION);
I_Assert(lua_istable(gL, -1));
lua_pushlightuserdata(gL, astate);
lua_rawget(gL, -2);
I_Assert(lua_isfunction(gL, -1));
lua_remove(gL, -2); // pop LREG_STATEACTION
// get the name for this action, if possible.
lua_getfield(gL, LUA_REGISTRYINDEX, LREG_ACTIONS);
lua_pushnil(gL);
while (lua_next(gL, -2))
{
if (lua_rawequal(gL, -1, -4))
{
found = true;
superactions[superstack] = lua_tostring(gL, -2); // "A_ACTION"
++superstack;
lua_pop(gL, 2); // pop the name and function
break;
}
lua_pop(gL, 1);
}
lua_pop(gL, 1); // pop LREG_ACTION
LUA_PushUserdata(gL, actor, META_MOBJ);
lua_pushinteger(gL, var1);
lua_pushinteger(gL, var2);
LUA_Call(gL, 3);
if (found)
{
--superstack;
superactions[superstack] = NULL;
}
lua_gc(gL, LUA_GCSTEP, 1);
}
// Hook for Got_AddPlayer
void LUAh_PlayerJoin(int playernum)
{
hook_p hookp;
if (!gL || !(hooksAvailable[hook_PlayerJoin/8] & (1<<(hook_PlayerJoin%8))))
return;
lua_settop(gL, 0);
lua_pushinteger(gL, playernum);
for (hookp = roothook; hookp; hookp = hookp->next)
if (hookp->type == hook_PlayerJoin)
{
lua_pushfstring(gL, FMT_HOOKID, hookp->id);
lua_gettable(gL, LUA_REGISTRYINDEX);
lua_pushvalue(gL, -2);
LUA_Call(gL, 1);
}
lua_settop(gL, 0);
}
// Hook for map load
void LUAh_MapLoad(void)
{
hook_p hookp;
if (!gL || !(hooksAvailable[hook_MapLoad/8] & (1<<(hook_MapLoad%8))))
return;
lua_settop(gL, 0);
lua_pushinteger(gL, gamemap);
for (hookp = roothook; hookp; hookp = hookp->next)
if (hookp->type == hook_MapLoad)
{
lua_pushfstring(gL, FMT_HOOKID, hookp->id);
lua_gettable(gL, LUA_REGISTRYINDEX);
lua_pushvalue(gL, -2);
LUA_Call(gL, 1);
}
lua_settop(gL, 0);
}
static void Lua_OnChange(void)
{
I_Assert(gL != NULL);
I_Assert(cvname != NULL);
/// \todo Network this! XD_LUAVAR
// From CV_OnChange registry field, get the function for this cvar by name.
lua_getfield(gL, LUA_REGISTRYINDEX, "CV_OnChange");
I_Assert(lua_istable(gL, -1));
lua_getfield(gL, -1, cvname); // get function
// From the CV_Vars registry field, get the cvar's userdata by name.
lua_getfield(gL, LUA_REGISTRYINDEX, "CV_Vars");
I_Assert(lua_istable(gL, -1));
lua_getfield(gL, -1, cvname); // get consvar_t* userdata.
lua_remove(gL, -2); // pop the CV_Vars table.
LUA_Call(gL, 1); // call function(cvar)
lua_pop(gL, 1); // pop CV_OnChange table
}
static void NetArchiveHook(lua_CFunction archFunc)
{
int TABLESINDEX;
if (!gL)
return;
TABLESINDEX = lua_gettop(gL);
lua_getfield(gL, LUA_REGISTRYINDEX, "hook");
I_Assert(lua_istable(gL, -1));
lua_rawgeti(gL, -1, hook_NetVars);
lua_remove(gL, -2);
I_Assert(lua_istable(gL, -1));
lua_pushvalue(gL, TABLESINDEX);
lua_pushcclosure(gL, archFunc, 1);
lua_pushnil(gL);
while (lua_next(gL, -3) != 0) {
lua_pushvalue(gL, -3); // function
LUA_Call(gL, 1);
}
lua_pop(gL, 2);
}
// Wrapper for COM_AddCommand commands
void COM_Lua_f(void)
{
char *buf, *p;
UINT8 i, flags;
UINT16 len;
INT32 playernum = consoleplayer;
I_Assert(gL != NULL);
lua_getfield(gL, LUA_REGISTRYINDEX, "COM_Command"); // push COM_Command
I_Assert(lua_istable(gL, -1));
// use buf temporarily -- must use lowercased string
buf = Z_StrDup(COM_Argv(0));
strlwr(buf);
lua_getfield(gL, -1, buf); // push command info table
I_Assert(lua_istable(gL, -1));
lua_remove(gL, -2); // pop COM_Command
Z_Free(buf);
lua_rawgeti(gL, -1, 2); // push flags from command info table
if (lua_isboolean(gL, -1))
flags = (lua_toboolean(gL, -1) ? 1 : 0);
else
flags = (UINT8)lua_tointeger(gL, -1);
lua_pop(gL, 1); // pop flags
if (flags & 2) // flag 2: splitscreen player command.
{
if (!splitscreen)
{
lua_pop(gL, 1); // pop command info table
return; // can't execute splitscreen command without player 2!
}
playernum = secondarydisplayplayer;
}
if (netgame)
{ // Send the command through the network
UINT8 argc;
lua_pop(gL, 1); // pop command info table
if (flags & 1 && !server && !IsPlayerAdmin(playernum)) // flag 1: only server/admin can use this command.
{
CONS_Printf(M_GetText("Only the server or a remote admin can use this.\n"));
return;
}
if (COM_Argc() > UINT8_MAX)
argc = UINT8_MAX;
else
argc = (UINT8)COM_Argc();
if (argc == UINT8_MAX)
len = UINT16_MAX;
else
len = (argc+1)*256;
buf = malloc(len);
p = buf;
WRITEUINT8(p, argc);
for (i = 0; i < argc; i++)
WRITESTRINGN(p, COM_Argv(i), 255);
if (flags & 2)
SendNetXCmd2(XD_LUACMD, buf, p-buf);
else
SendNetXCmd(XD_LUACMD, buf, p-buf);
free(buf);
return;
}
// Do the command locally, NetXCmds don't go through outside of GS_LEVEL || GS_INTERMISSION
lua_rawgeti(gL, -1, 1); // push function from command info table
I_Assert(lua_isfunction(gL, -1));
lua_remove(gL, -2); // pop command info table
LUA_PushUserdata(gL, &players[playernum], META_PLAYER);
for (i = 1; i < COM_Argc(); i++)
lua_pushstring(gL, COM_Argv(i));
LUA_Call(gL, (int)COM_Argc()); // COM_Argc is 1-based, so this will cover the player we passed too.
}
void Got_Luacmd(UINT8 **cp, INT32 playernum)
{
UINT8 i, argc, flags;
char buf[256];
// don't use I_Assert here, goto the deny code below
// to clean up and kick people who try nefarious exploits
// like sending random junk lua commands to crash the server
if (!gL) goto deny;
lua_getfield(gL, LUA_REGISTRYINDEX, "COM_Command"); // push COM_Command
if (!lua_istable(gL, -1)) goto deny;
argc = READUINT8(*cp);
READSTRINGN(*cp, buf, 255);
strlwr(buf); // must lowercase buffer
lua_getfield(gL, -1, buf); // push command info table
if (!lua_istable(gL, -1)) goto deny;
lua_remove(gL, -2); // pop COM_Command
lua_rawgeti(gL, -1, 2); // push flags from command info table
if (lua_isboolean(gL, -1))
flags = (lua_toboolean(gL, -1) ? 1 : 0);
else
flags = (UINT8)lua_tointeger(gL, -1);
lua_pop(gL, 1); // pop flags
// requires server/admin and the player is not one of them
if ((flags & 1) && playernum != serverplayer && !IsPlayerAdmin(playernum))
goto deny;
lua_rawgeti(gL, -1, 1); // push function from command info table
// although honestly this should be true anyway
// BUT GODDAMNIT I SAID NO I_ASSERTS SO NO I_ASSERTS IT IS
if (!lua_isfunction(gL, -1)) goto deny;
lua_remove(gL, -2); // pop command info table
LUA_PushUserdata(gL, &players[playernum], META_PLAYER);
for (i = 1; i < argc; i++)
{
READSTRINGN(*cp, buf, 255);
lua_pushstring(gL, buf);
}
LUA_Call(gL, (int)argc); // argc is 1-based, so this will cover the player we passed too.
return;
deny:
//must be hacked/buggy client
if (gL) // check if Lua is actually turned on first, you dummmy -- Monster Iestyn 04/07/18
lua_settop(gL, 0); // clear stack
CONS_Alert(CONS_WARNING, M_GetText("Illegal lua command received from %s\n"), player_names[playernum]);
if (server)
{
XBOXSTATIC UINT8 bufn[2];
bufn[0] = (UINT8)playernum;
bufn[1] = KICK_MSG_CON_FAIL;
SendNetXCmd(XD_KICK, &bufn, 2);
}
}
