mirror of
https://github.com/ZDoom/Raze.git
synced 2024-11-29 23:42:08 +00:00
521 lines
15 KiB
C++
521 lines
15 KiB
C++
/*
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** codegen.cpp
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**
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** Compiler backend / code generation for ZScript
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**
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**---------------------------------------------------------------------------
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** Copyright 2008-2022 Christoph Oelckers
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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**
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*/
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#include <stdlib.h>
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#include "cmdlib.h"
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#include "codegen.h"
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#include "codegen_raze.h"
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#include "v_text.h"
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#include "filesystem.h"
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#include "v_video.h"
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#include "utf8.h"
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#include "texturemanager.h"
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#include "m_random.h"
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#include "v_font.h"
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#include "gamecontrol.h"
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#include "gi.h"
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#include "games/duke/src/duke3d.h"
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PFunction* FindBuiltinFunction(FName funcname);
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//==========================================================================
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//
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//
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//
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//==========================================================================
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bool isActor(PContainerType* type)
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{
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auto cls = PType::toClass(type);
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return cls ? cls->Descriptor->IsDescendantOf(RUNTIME_CLASS(DCoreActor)) : false;
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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static FxExpression* CheckForDefault(FxIdentifier* func, FCompileContext& ctx)
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{
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auto& ScriptPosition = func->ScriptPosition;
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if (func->Identifier == NAME_Default)
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{
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if (ctx.Function == nullptr)
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{
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ScriptPosition.Message(MSG_ERROR, "Unable to access class defaults from constant declaration");
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delete func;
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return nullptr;
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}
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if (ctx.Function->Variants[0].SelfClass == nullptr)
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{
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ScriptPosition.Message(MSG_ERROR, "Unable to access class defaults from static function");
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delete func;
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return nullptr;
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}
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if (!isActor(ctx.Function->Variants[0].SelfClass))
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{
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ScriptPosition.Message(MSG_ERROR, "'Default' requires an actor type.");
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delete func;
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return nullptr;
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}
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FxExpression* x = new FxClassDefaults(new FxSelf(ScriptPosition), ScriptPosition);
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delete func;
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return x->Resolve(ctx);
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}
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return func;
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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static FxExpression *ResolveForDefault(FxIdentifier *expr, FxExpression*& object, PContainerType* objtype, FCompileContext &ctx)
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{
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if (expr->Identifier == NAME_Default)
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{
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if (!isActor(objtype))
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{
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expr->ScriptPosition.Message(MSG_ERROR, "'Default' requires an actor type.");
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delete object;
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object = nullptr;
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return nullptr;
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}
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FxExpression * x = new FxClassDefaults(object, expr->ScriptPosition);
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object = nullptr;
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delete expr;
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return x->Resolve(ctx);
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}
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return expr;
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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FxExpression* CheckForMemberDefault(FxStructMember *func, FCompileContext &ctx)
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{
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auto& membervar = func->membervar;
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auto& classx = func->classx;
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auto& ScriptPosition = func->ScriptPosition;
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if (membervar->SymbolName == NAME_Default)
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{
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if (!classx->ValueType->isObjectPointer()
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|| !static_cast<PObjectPointer *>(classx->ValueType)->PointedClass()->IsDescendantOf(RUNTIME_CLASS(DCoreActor)))
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{
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ScriptPosition.Message(MSG_ERROR, "'Default' requires an actor type");
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delete func;
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return nullptr;
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}
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FxExpression * x = new FxClassDefaults(classx, ScriptPosition);
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classx = nullptr;
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delete func;
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return x->Resolve(ctx);
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}
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return func;
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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bool CheckArgSize(FName fname, FArgumentList &args, int min, int max, FScriptPosition &sc);
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static FxExpression *ResolveGlobalCustomFunction(FxFunctionCall *func, FCompileContext &ctx)
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{
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auto& ScriptPosition = func->ScriptPosition;
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if (func->MethodName == NAME_GetDefaultByType)
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{
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if (CheckArgSize(NAME_GetDefaultByType, func->ArgList, 1, 1, ScriptPosition))
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{
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auto newfunc = new FxGetDefaultByType(func->ArgList[0]);
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func->ArgList[0] = nullptr;
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delete func;
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return newfunc->Resolve(ctx);
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}
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}
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// the following 3 are just for compile time argument validation, they do not affect code generation.
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else if (func->MethodName == NAME_SetAction && isDukeEngine())
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{
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auto cls = ctx.Function->Variants[0].SelfClass;
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if (cls == nullptr || !cls->isClass()) return func;
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auto clas = static_cast<PClassType*>(cls)->Descriptor;
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if (!clas->IsDescendantOf(RUNTIME_CLASS(Duke3d::DDukeActor))) return func;
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if (CheckArgSize(NAME_SetAction, func->ArgList, 1, 1, ScriptPosition))
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{
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FxExpression* x;
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x = func->ArgList[0] = func->ArgList[0]->Resolve(ctx);
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if (x && x->isConstant() && (x->ValueType == TypeName || x->ValueType == TypeString))
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{
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auto c = static_cast<FxConstant*>(x);
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auto nm = c->GetValue().GetName();
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if (nm == NAME_None) return func;
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int pos = Duke3d::LookupAction(clas, nm);
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if (pos == 0)
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{
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ScriptPosition.Message(MSG_ERROR, "Invalid action '%s'", nm.GetChars());
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delete func;
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return nullptr;
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}
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}
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}
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}
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else if (func->MethodName == NAME_SetAI && isDukeEngine())
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{
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auto cls = ctx.Function->Variants[0].SelfClass;
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if (cls == nullptr || !cls->isClass()) return func;
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auto clas = static_cast<PClassType*>(cls)->Descriptor;
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if (!clas->IsDescendantOf(RUNTIME_CLASS(Duke3d::DDukeActor))) return func;
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if (CheckArgSize(NAME_SetAI, func->ArgList, 1, 1, ScriptPosition))
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{
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FxExpression* x;
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x = func->ArgList[0] = func->ArgList[0]->Resolve(ctx);
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if (x && x->isConstant() && (x->ValueType == TypeName || x->ValueType == TypeString))
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{
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auto c = static_cast<FxConstant*>(x);
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auto nm = c->GetValue().GetName();
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if (nm == NAME_None) return func;
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int pos = Duke3d::LookupAI(clas, nm);
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if (pos == 0)
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{
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ScriptPosition.Message(MSG_ERROR, "Invalid AI '%s'", nm.GetChars());
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delete func;
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return nullptr;
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}
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}
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}
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}
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else if (func->MethodName == NAME_SetMove && isDukeEngine())
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{
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auto cls = ctx.Function->Variants[0].SelfClass;
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if (cls == nullptr || !cls->isClass()) return func;
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auto clas = static_cast<PClassType*>(cls)->Descriptor;
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if (!clas->IsDescendantOf(RUNTIME_CLASS(Duke3d::DDukeActor))) return func;
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if (CheckArgSize(NAME_SetMove, func->ArgList, 1, 2, ScriptPosition))
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{
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FxExpression* x;
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x = func->ArgList[0] = func->ArgList[0]->Resolve(ctx);
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if (x && x->isConstant() && (x->ValueType == TypeName || x->ValueType == TypeString))
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{
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auto c = static_cast<FxConstant*>(x);
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auto nm = c->GetValue().GetName();
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if (nm == NAME_None) return func;
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int pos = Duke3d::LookupMove(clas, nm);
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if (pos == 0)
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{
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ScriptPosition.Message(MSG_ERROR, "Invalid move '%s'", nm.GetChars());
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delete func;
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return nullptr;
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}
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}
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}
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}
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// most of these can be resolved right here. Only isWorldTour, isPlutoPak and isShareware can not if Duke is being played.
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else if (func->MethodName == NAME_isDuke)
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{
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return new FxConstant(isDuke(), ScriptPosition);
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}
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else if (func->MethodName == NAME_isNam)
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{
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return new FxConstant(isNam(), ScriptPosition);
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}
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else if (func->MethodName == NAME_isNamWW2GI)
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{
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return new FxConstant(isNamWW2GI(), ScriptPosition);
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}
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else if (func->MethodName == NAME_isWW2GI)
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{
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return new FxConstant(isWW2GI(), ScriptPosition);
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}
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else if (func->MethodName == NAME_isRR)
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{
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return new FxConstant(isRR(), ScriptPosition);
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}
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else if (func->MethodName == NAME_isRRRA)
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{
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return new FxConstant(isRRRA(), ScriptPosition);
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}
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else if (func->MethodName == NAME_isRoute66)
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{
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return new FxConstant(isRoute66(), ScriptPosition);
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}
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else if (func->MethodName == NAME_isWorldTour)
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{
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if (!isDuke()) return new FxConstant(false, ScriptPosition);
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else return new FxIsGameType(GAMEFLAG_WORLDTOUR, ScriptPosition);
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}
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else if (func->MethodName == NAME_isPlutoPak)
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{
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if (!isDuke()) return new FxConstant(false, ScriptPosition);
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else return new FxIsGameType(GAMEFLAG_PLUTOPAK, ScriptPosition);
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}
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else if (func->MethodName == NAME_isShareware)
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{
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if (!isDuke()) return new FxConstant(isShareware(), ScriptPosition);
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else return new FxIsGameType(GAMEFLAG_SHAREWARE, ScriptPosition);
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}
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else if (func->MethodName == NAME_isVacation)
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{
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return new FxConstant(isVacation(), ScriptPosition);
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}
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else if (func->MethodName == NAME_isDukeLike)
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{
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return new FxConstant(isDukeLike(), ScriptPosition);
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}
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else if (func->MethodName == NAME_isDukeEngine)
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{
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return new FxConstant(isDukeEngine(), ScriptPosition);
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}
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else if (func->MethodName == NAME_isBlood)
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{
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return new FxConstant(isBlood(), ScriptPosition);
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}
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else if (func->MethodName == NAME_isSW)
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{
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return new FxConstant(isSWALL(), ScriptPosition);
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}
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else if (func->MethodName == NAME_isExhumed)
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{
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return new FxConstant(isExhumed(), ScriptPosition);
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}
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return func;
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}
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//==========================================================================
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//
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// code generation is only performed for some Duke checks that depend on CON
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// which cannot be resolved at compile time.
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//
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//==========================================================================
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FxIsGameType::FxIsGameType(int arg, const FScriptPosition &pos)
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: FxExpression(EFX_ActionSpecialCall, pos)
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{
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state = arg;
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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FxIsGameType::~FxIsGameType()
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{
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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FxExpression *FxIsGameType::Resolve(FCompileContext& ctx)
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{
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CHECKRESOLVED();
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ValueType = TypeBool;
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return this;
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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ExpEmit FxIsGameType::Emit(VMFunctionBuilder *build)
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{
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ExpEmit obj(build, REGT_POINTER);
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auto addr = (intptr_t)&gameinfo.gametype;
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assert(state != 0);
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while (state >= 256)
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{
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state >>= 8;
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addr++;
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}
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build->Emit(OP_LKP, obj.RegNum, build->GetConstantAddress((void*)addr));
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ExpEmit loc(build, REGT_INT);
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build->Emit(OP_LBIT, loc.RegNum, obj.RegNum, state);
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obj.Free(build);
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return loc;
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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FxClassDefaults::FxClassDefaults(FxExpression *X, const FScriptPosition &pos)
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: FxExpression(EFX_ClassDefaults, pos)
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{
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obj = X;
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}
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FxClassDefaults::~FxClassDefaults()
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{
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SAFE_DELETE(obj);
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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FxExpression *FxClassDefaults::Resolve(FCompileContext& ctx)
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{
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CHECKRESOLVED();
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SAFE_RESOLVE(obj, ctx);
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assert(obj->ValueType->isRealPointer());
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ValueType = NewPointer(obj->ValueType->toPointer()->PointedType, true);
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return this;
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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ExpEmit FxClassDefaults::Emit(VMFunctionBuilder *build)
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{
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ExpEmit ob = obj->Emit(build);
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ob.Free(build);
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ExpEmit meta(build, REGT_POINTER);
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build->Emit(OP_CLSS, meta.RegNum, ob.RegNum);
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build->Emit(OP_LP, meta.RegNum, meta.RegNum, build->GetConstantInt(myoffsetof(PClass, Defaults)));
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return meta;
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}
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//==========================================================================
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//
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//
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//==========================================================================
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FxGetDefaultByType::FxGetDefaultByType(FxExpression *self)
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:FxExpression(EFX_GetDefaultByType, self->ScriptPosition)
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{
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Self = self;
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}
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FxGetDefaultByType::~FxGetDefaultByType()
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{
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SAFE_DELETE(Self);
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}
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FxExpression *FxGetDefaultByType::Resolve(FCompileContext &ctx)
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{
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SAFE_RESOLVE(Self, ctx);
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PClass *cls = nullptr;
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if (Self->ValueType == TypeString || Self->ValueType == TypeName)
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{
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if (Self->isConstant())
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{
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cls = PClass::FindActor(static_cast<FxConstant *>(Self)->GetValue().GetName());
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if (cls == nullptr)
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{
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ScriptPosition.Message(MSG_ERROR, "GetDefaultByType() requires an actor class type, but got %s", static_cast<FxConstant *>(Self)->GetValue().GetString().GetChars());
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delete this;
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return nullptr;
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}
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Self = new FxConstant(cls, NewClassPointer(cls), ScriptPosition);
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}
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else
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{
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// this is the ugly case. We do not know what we have and cannot do proper type casting.
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// For now error out and let this case require explicit handling on the user side.
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ScriptPosition.Message(MSG_ERROR, "GetDefaultByType() requires an actor class type, but got %s", static_cast<FxConstant *>(Self)->GetValue().GetString().GetChars());
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delete this;
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return nullptr;
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}
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}
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else
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{
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auto cp = PType::toClassPointer(Self->ValueType);
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if (cp == nullptr || !cp->ClassRestriction->IsDescendantOf(RUNTIME_CLASS(DCoreActor)))
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{
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ScriptPosition.Message(MSG_ERROR, "GetDefaultByType() requires an actor class type");
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delete this;
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return nullptr;
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}
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cls = cp->ClassRestriction;
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}
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ValueType = NewPointer(cls, true);
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return this;
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}
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ExpEmit FxGetDefaultByType::Emit(VMFunctionBuilder *build)
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{
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ExpEmit op = Self->Emit(build);
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op.Free(build);
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ExpEmit to(build, REGT_POINTER);
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if (op.Konst)
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{
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build->Emit(OP_LKP, to.RegNum, op.RegNum);
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op = to;
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}
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build->Emit(OP_LP, to.RegNum, op.RegNum, build->GetConstantInt(myoffsetof(PClass, Defaults)));
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return to;
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}
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void SetRazeCompileEnvironment()
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{
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compileEnvironment.CheckSpecialIdentifier = CheckForDefault;
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compileEnvironment.ResolveSpecialIdentifier = ResolveForDefault;
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compileEnvironment.CheckSpecialMember = CheckForMemberDefault;
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compileEnvironment.CheckCustomGlobalFunctions = ResolveGlobalCustomFunction;
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}
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