mirror of
https://github.com/ZDoom/qzdoom-gpl.git
synced 2024-12-13 21:51:08 +00:00
549 lines
14 KiB
C++
549 lines
14 KiB
C++
/*
|
|
** thingdef_states.cpp
|
|
**
|
|
** Actor definitions - the state parser
|
|
**
|
|
**---------------------------------------------------------------------------
|
|
** Copyright 2002-2007 Christoph Oelckers
|
|
** Copyright 2004-2007 Randy Heit
|
|
** All rights reserved.
|
|
**
|
|
** Redistribution and use in source and binary forms, with or without
|
|
** modification, are permitted provided that the following conditions
|
|
** are met:
|
|
**
|
|
** 1. Redistributions of source code must retain the above copyright
|
|
** notice, this list of conditions and the following disclaimer.
|
|
** 2. Redistributions in binary form must reproduce the above copyright
|
|
** notice, this list of conditions and the following disclaimer in the
|
|
** documentation and/or other materials provided with the distribution.
|
|
** 3. The name of the author may not be used to endorse or promote products
|
|
** derived from this software without specific prior written permission.
|
|
** 4. When not used as part of ZDoom or a ZDoom derivative, this code will be
|
|
** covered by the terms of the GNU General Public License as published by
|
|
** the Free Software Foundation; either version 2 of the License, or (at
|
|
** your option) any later version.
|
|
**
|
|
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
**---------------------------------------------------------------------------
|
|
**
|
|
*/
|
|
|
|
#include "actor.h"
|
|
#include "info.h"
|
|
#include "sc_man.h"
|
|
#include "tarray.h"
|
|
#include "templates.h"
|
|
#include "cmdlib.h"
|
|
#include "p_lnspec.h"
|
|
#include "a_action.h"
|
|
#include "p_local.h"
|
|
#include "v_palette.h"
|
|
#include "doomerrors.h"
|
|
#include "thingdef.h"
|
|
#include "a_sharedglobal.h"
|
|
#include "s_sound.h"
|
|
#include "i_system.h"
|
|
#include "colormatcher.h"
|
|
#include "thingdef_exp.h"
|
|
#include "version.h"
|
|
#include "templates.h"
|
|
|
|
TDeletingArray<FStateTempCall *> StateTempCalls;
|
|
|
|
//==========================================================================
|
|
//***
|
|
// DoActionSpecials
|
|
// handles action specials as code pointers
|
|
//
|
|
//==========================================================================
|
|
FxVMFunctionCall *DoActionSpecials(FScanner &sc, FState & state, Baggage &bag)
|
|
{
|
|
int i;
|
|
int min_args, max_args;
|
|
FString specname = sc.String;
|
|
|
|
int special = P_FindLineSpecial(sc.String, &min_args, &max_args);
|
|
|
|
if (special > 0 && min_args >= 0)
|
|
{
|
|
FArgumentList *args = new FArgumentList;
|
|
args->Push(new FxParameter(new FxConstant(special, sc)));
|
|
i = 0;
|
|
|
|
// Make this consistent with all other parameter parsing
|
|
if (sc.CheckToken('('))
|
|
{
|
|
while (i < 5)
|
|
{
|
|
args->Push(new FxParameter(new FxIntCast(ParseExpression(sc, bag.Info))));
|
|
i++;
|
|
if (!sc.CheckToken (',')) break;
|
|
}
|
|
sc.MustGetToken (')');
|
|
}
|
|
|
|
if (i < min_args)
|
|
{
|
|
sc.ScriptError ("Too few arguments to %s", specname.GetChars());
|
|
}
|
|
if (i > max_args)
|
|
{
|
|
sc.ScriptError ("Too many arguments to %s", specname.GetChars());
|
|
}
|
|
return new FxVMFunctionCall(FindGlobalActionFunction("A_CallSpecial"), args, sc);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
//==========================================================================
|
|
//***
|
|
// Reads a state label that may contain '.'s.
|
|
// processes a state block
|
|
//
|
|
//==========================================================================
|
|
static FString ParseStateString(FScanner &sc)
|
|
{
|
|
FString statestring;
|
|
|
|
sc.MustGetString();
|
|
statestring = sc.String;
|
|
if (sc.CheckString("::"))
|
|
{
|
|
sc.MustGetString ();
|
|
statestring << "::" << sc.String;
|
|
}
|
|
while (sc.CheckString ("."))
|
|
{
|
|
sc.MustGetString ();
|
|
statestring << "." << sc.String;
|
|
}
|
|
return statestring;
|
|
}
|
|
|
|
//==========================================================================
|
|
//***
|
|
// ParseStates
|
|
// parses a state block
|
|
//
|
|
//==========================================================================
|
|
void ParseStates(FScanner &sc, PClassActor * actor, AActor * defaults, Baggage &bag)
|
|
{
|
|
FString statestring;
|
|
FState state;
|
|
char lastsprite[5] = "";
|
|
FStateTempCall *tcall = NULL;
|
|
FArgumentList *args = NULL;
|
|
|
|
sc.MustGetStringName ("{");
|
|
sc.SetEscape(false); // disable escape sequences in the state parser
|
|
while (!sc.CheckString ("}") && !sc.End)
|
|
{
|
|
memset(&state,0,sizeof(state));
|
|
statestring = ParseStateString(sc);
|
|
if (!statestring.CompareNoCase("GOTO"))
|
|
{
|
|
do_goto:
|
|
statestring = ParseStateString(sc);
|
|
if (sc.CheckString ("+"))
|
|
{
|
|
sc.MustGetNumber ();
|
|
statestring += '+';
|
|
statestring += sc.String;
|
|
}
|
|
if (!bag.statedef.SetGotoLabel(statestring))
|
|
{
|
|
sc.ScriptError("GOTO before first state");
|
|
}
|
|
}
|
|
else if (!statestring.CompareNoCase("STOP"))
|
|
{
|
|
do_stop:
|
|
if (!bag.statedef.SetStop())
|
|
{
|
|
sc.ScriptError("STOP before first state");
|
|
continue;
|
|
}
|
|
}
|
|
else if (!statestring.CompareNoCase("WAIT") || !statestring.CompareNoCase("FAIL"))
|
|
{
|
|
if (!bag.statedef.SetWait())
|
|
{
|
|
sc.ScriptError("%s before first state", sc.String);
|
|
continue;
|
|
}
|
|
}
|
|
else if (!statestring.CompareNoCase("LOOP"))
|
|
{
|
|
if (!bag.statedef.SetLoop())
|
|
{
|
|
sc.ScriptError("LOOP before first state");
|
|
continue;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
sc.MustGetString();
|
|
if (sc.Compare (":"))
|
|
{
|
|
do
|
|
{
|
|
bag.statedef.AddStateLabel(statestring);
|
|
statestring = ParseStateString(sc);
|
|
if (!statestring.CompareNoCase("GOTO"))
|
|
{
|
|
goto do_goto;
|
|
}
|
|
else if (!statestring.CompareNoCase("STOP"))
|
|
{
|
|
goto do_stop;
|
|
}
|
|
sc.MustGetString ();
|
|
} while (sc.Compare (":"));
|
|
// continue;
|
|
}
|
|
|
|
sc.UnGet ();
|
|
|
|
if (statestring.Len() != 4)
|
|
{
|
|
sc.ScriptError ("Sprite names must be exactly 4 characters\n");
|
|
}
|
|
|
|
state.sprite = GetSpriteIndex(statestring);
|
|
state.Misc1 = state.Misc2 = 0;
|
|
sc.MustGetString();
|
|
statestring = sc.String;
|
|
|
|
if (tcall == NULL)
|
|
{
|
|
tcall = new FStateTempCall;
|
|
}
|
|
if (sc.CheckString("RANDOM"))
|
|
{
|
|
int min, max;
|
|
|
|
sc.MustGetStringName("(");
|
|
sc.MustGetNumber();
|
|
min = clamp<int>(sc.Number, -1, SHRT_MAX);
|
|
sc.MustGetStringName(",");
|
|
sc.MustGetNumber();
|
|
max = clamp<int>(sc.Number, -1, SHRT_MAX);
|
|
sc.MustGetStringName(")");
|
|
if (min > max)
|
|
{
|
|
swapvalues(min, max);
|
|
}
|
|
state.Tics = min;
|
|
state.TicRange = max - min;
|
|
}
|
|
else
|
|
{
|
|
sc.MustGetNumber();
|
|
state.Tics = clamp<int>(sc.Number, -1, SHRT_MAX);
|
|
state.TicRange = 0;
|
|
}
|
|
|
|
while (sc.GetString() && (!sc.Crossed || sc.Compare("{")))
|
|
{
|
|
if (sc.Compare("BRIGHT"))
|
|
{
|
|
state.Fullbright = true;
|
|
continue;
|
|
}
|
|
if (sc.Compare("FAST"))
|
|
{
|
|
state.Fast = true;
|
|
continue;
|
|
}
|
|
if (sc.Compare("SLOW"))
|
|
{
|
|
state.Slow = true;
|
|
continue;
|
|
}
|
|
if (sc.Compare("NODELAY"))
|
|
{
|
|
if (bag.statedef.GetStateLabelIndex(NAME_Spawn) == bag.statedef.GetStateCount())
|
|
{
|
|
state.NoDelay = true;
|
|
}
|
|
else
|
|
{
|
|
sc.ScriptMessage("NODELAY may only be used immediately after Spawn:");
|
|
}
|
|
continue;
|
|
}
|
|
if (sc.Compare("OFFSET"))
|
|
{
|
|
// specify a weapon offset
|
|
sc.MustGetStringName("(");
|
|
sc.MustGetNumber();
|
|
state.Misc1 = sc.Number;
|
|
sc.MustGetStringName (",");
|
|
sc.MustGetNumber();
|
|
state.Misc2 = sc.Number;
|
|
sc.MustGetStringName(")");
|
|
continue;
|
|
}
|
|
if (sc.Compare("LIGHT"))
|
|
{
|
|
sc.MustGetStringName("(");
|
|
do
|
|
{
|
|
sc.MustGetString();
|
|
#ifdef DYNLIGHT
|
|
AddStateLight(&state, sc.String);
|
|
#endif
|
|
}
|
|
while (sc.CheckString(","));
|
|
sc.MustGetStringName(")");
|
|
continue;
|
|
}
|
|
if (sc.Compare("CANRAISE"))
|
|
{
|
|
state.CanRaise = true;
|
|
continue;
|
|
}
|
|
|
|
tcall->Code = ParseActions(sc, state, statestring, bag);
|
|
goto endofstate;
|
|
}
|
|
sc.UnGet();
|
|
endofstate:
|
|
int count = bag.statedef.AddStates(&state, statestring);
|
|
if (count < 0)
|
|
{
|
|
sc.ScriptError ("Invalid frame character string '%s'", statestring.GetChars());
|
|
count = -count;
|
|
}
|
|
if (tcall->Code != NULL)
|
|
{
|
|
tcall->ActorClass = actor;
|
|
tcall->FirstState = bag.statedef.GetStateCount() - count;
|
|
tcall->NumStates = count;
|
|
StateTempCalls.Push(tcall);
|
|
tcall = NULL;
|
|
}
|
|
}
|
|
}
|
|
if (tcall != NULL)
|
|
{
|
|
delete tcall;
|
|
}
|
|
if (args != NULL)
|
|
{
|
|
delete args;
|
|
}
|
|
sc.SetEscape(true); // re-enable escape sequences
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// ParseActions
|
|
//
|
|
//==========================================================================
|
|
|
|
FxTailable *ParseActions(FScanner &sc, FState state, FString statestring, Baggage &bag)
|
|
{
|
|
// If it's not a '{', then it should be a single action.
|
|
// Otherwise, it's a sequence of actions.
|
|
if (!sc.Compare("{"))
|
|
{
|
|
return ParseAction(sc, state, statestring, bag);
|
|
}
|
|
|
|
const FScriptPosition pos(sc);
|
|
|
|
FxSequence *seq = NULL;
|
|
sc.MustGetString();
|
|
while (!sc.Compare("}"))
|
|
{
|
|
FxTailable *add;
|
|
if (sc.Compare("if"))
|
|
{ // Hangle an if statement
|
|
FxExpression *cond;
|
|
FxTailable *true_part, *false_part = NULL;
|
|
sc.MustGetStringName("(");
|
|
cond = ParseExpression(sc, bag.Info);
|
|
sc.MustGetStringName(")");
|
|
sc.MustGetStringName("{"); // braces are mandatory
|
|
true_part = ParseActions(sc, state, statestring, bag);
|
|
sc.MustGetString();
|
|
if (sc.Compare("else"))
|
|
{
|
|
sc.MustGetStringName("{"); // braces are still mandatory
|
|
false_part = ParseActions(sc, state, statestring, bag);
|
|
sc.MustGetString();
|
|
}
|
|
add = new FxIfStatement(cond, true_part, false_part, sc);
|
|
}
|
|
else
|
|
{ // Handle a regular action function call
|
|
add = ParseAction(sc, state, statestring, bag);
|
|
sc.MustGetStringName(";");
|
|
sc.MustGetString();
|
|
}
|
|
// Only return a sequence if it has actual content.
|
|
if (add != NULL)
|
|
{
|
|
if (seq == NULL)
|
|
{
|
|
seq = new FxSequence(pos);
|
|
}
|
|
seq->Add(add);
|
|
}
|
|
}
|
|
return seq;
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// ParseAction
|
|
//
|
|
//==========================================================================
|
|
|
|
FxVMFunctionCall *ParseAction(FScanner &sc, FState state, FString statestring, Baggage &bag)
|
|
{
|
|
FxVMFunctionCall *call;
|
|
|
|
// Make the action name lowercase
|
|
strlwr (sc.String);
|
|
|
|
call = DoActionSpecials(sc, state, bag);
|
|
if (call != NULL)
|
|
{
|
|
return call;
|
|
}
|
|
|
|
PFunction *afd = dyn_cast<PFunction>(bag.Info->Symbols.FindSymbol(FName(sc.String, true), true));
|
|
if (afd != NULL)
|
|
{
|
|
FArgumentList *args = new FArgumentList;
|
|
ParseFunctionParameters(sc, bag.Info, *args, afd, statestring, &bag.statedef);
|
|
call = new FxVMFunctionCall(afd, args->Size() > 0 ? args : NULL, sc);
|
|
if (args->Size() == 0)
|
|
{
|
|
delete args;
|
|
}
|
|
return call;
|
|
}
|
|
sc.ScriptError("Invalid state parameter %s\n", sc.String);
|
|
return NULL;
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// ParseFunctionParameters
|
|
//
|
|
// Parses the parameters for a VM function. Called by both ParseStates
|
|
// (which will set statestring and statedef) and by ParseExpression0 (which
|
|
// will not set them). The first token returned by the scanner when entering
|
|
// this function should be '('.
|
|
//
|
|
//==========================================================================
|
|
|
|
void ParseFunctionParameters(FScanner &sc, PClassActor *cls, TArray<FxExpression *> &out_params,
|
|
PFunction *afd, FString statestring, FStateDefinitions *statedef)
|
|
{
|
|
const TArray<PType *> ¶ms = afd->Variants[0].Proto->ArgumentTypes;
|
|
const TArray<DWORD> ¶mflags = afd->Variants[0].ArgFlags;
|
|
int numparams = (int)params.Size();
|
|
int pnum = 0;
|
|
bool zeroparm;
|
|
|
|
if (afd->Flags & VARF_Method)
|
|
{
|
|
numparams--;
|
|
pnum++;
|
|
}
|
|
if (afd->Flags & VARF_Action)
|
|
{
|
|
numparams -= 2;
|
|
pnum += 2;
|
|
}
|
|
assert(numparams >= 0);
|
|
zeroparm = numparams == 0;
|
|
if (numparams > 0 && !(paramflags[pnum] & VARF_Optional))
|
|
{
|
|
sc.MustGetStringName("(");
|
|
}
|
|
else
|
|
{
|
|
if (!sc.CheckString("("))
|
|
{
|
|
return;
|
|
}
|
|
}
|
|
while (numparams > 0)
|
|
{
|
|
FxExpression *x;
|
|
if (statedef != NULL && params[pnum] == TypeState && sc.CheckNumber())
|
|
{
|
|
// Special case: State label as an offset
|
|
if (sc.Number > 0 && statestring.Len() > 1)
|
|
{
|
|
sc.ScriptError("You cannot use state jumps commands with a jump offset on multistate definitions\n");
|
|
}
|
|
|
|
int v = sc.Number;
|
|
if (v < 0)
|
|
{
|
|
sc.ScriptError("Negative jump offsets are not allowed");
|
|
}
|
|
|
|
if (v > 0)
|
|
{
|
|
x = new FxStateByIndex(statedef->GetStateCount() + v, sc);
|
|
}
|
|
else
|
|
{
|
|
x = new FxConstant((FState*)NULL, sc);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// Use the generic parameter parser for everything else
|
|
x = ParseParameter(sc, cls, params[pnum], false);
|
|
}
|
|
out_params.Push(new FxParameter(x));
|
|
pnum++;
|
|
numparams--;
|
|
if (numparams > 0)
|
|
{
|
|
if (params[pnum] == NULL)
|
|
{ // varargs function
|
|
if (sc.CheckString(")"))
|
|
{
|
|
return;
|
|
}
|
|
pnum--;
|
|
numparams++;
|
|
}
|
|
else if ((paramflags[pnum] & VARF_Optional) && sc.CheckString(")"))
|
|
{
|
|
return;
|
|
}
|
|
sc.MustGetStringName (",");
|
|
}
|
|
}
|
|
if (zeroparm)
|
|
{
|
|
if (!sc.CheckString(")"))
|
|
{
|
|
sc.ScriptError("You cannot pass parameters to '%s'\n", afd->SymbolName.GetChars());
|
|
}
|
|
}
|
|
else
|
|
{
|
|
sc.MustGetStringName(")");
|
|
}
|
|
}
|