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//
//Copyright (C) 2016 Google, Inc.
//Copyright (C) 2016 LunarG, Inc.
//
//All rights reserved.
//
//Redistribution and use in source and binary forms, with or without
//modification, are permitted provided that the following conditions
//are met:
//
// Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 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.
//
// Neither the name of 3Dlabs Inc. Ltd. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
//THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
//"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
//COPYRIGHT HOLDERS OR CONTRIBUTORS 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.
//
#ifndef HLSL_PARSE_INCLUDED_
#define HLSL_PARSE_INCLUDED_
#include "../glslang/MachineIndependent/parseVersions.h"
#include "../glslang/MachineIndependent/ParseHelper.h"
namespace glslang {
class HlslParseContext : public TParseContextBase {
public:
HlslParseContext(TSymbolTable&, TIntermediate&, bool parsingBuiltins,
int version, EProfile, int spv, int vulkan, EShLanguage, TInfoSink&,
bool forwardCompatible = false, EShMessages messages = EShMsgDefault);
virtual ~HlslParseContext();
void setLimits(const TBuiltInResource&);
bool parseShaderStrings(TPpContext&, TInputScanner& input, bool versionWillBeError = false);
void getPreamble(std::string&);
void C_DECL error(const TSourceLoc&, const char* szReason, const char* szToken,
const char* szExtraInfoFormat, ...);
void C_DECL warn(const TSourceLoc&, const char* szReason, const char* szToken,
const char* szExtraInfoFormat, ...);
void C_DECL ppError(const TSourceLoc&, const char* szReason, const char* szToken,
const char* szExtraInfoFormat, ...);
void C_DECL ppWarn(const TSourceLoc&, const char* szReason, const char* szToken,
const char* szExtraInfoFormat, ...);
void reservedPpErrorCheck(const TSourceLoc&, const char* name, const char* op) { }
bool lineContinuationCheck(const TSourceLoc&, bool endOfComment) { return true; }
bool lineDirectiveShouldSetNextLine() const { return true; }
bool builtInName(const TString&);
void handlePragma(const TSourceLoc&, const TVector<TString>&);
TIntermTyped* handleVariable(const TSourceLoc&, TSymbol* symbol, const TString* string);
TIntermTyped* handleBracketDereference(const TSourceLoc&, TIntermTyped* base, TIntermTyped* index);
void checkIndex(const TSourceLoc&, const TType&, int& index);
void makeEditable(TSymbol*&);
TVariable* getEditableVariable(const char* name);
bool isIoResizeArray(const TType&) const;
void fixIoArraySize(const TSourceLoc&, TType&);
void handleIoResizeArrayAccess(const TSourceLoc&, TIntermTyped* base);
void checkIoArraysConsistency(const TSourceLoc&, bool tailOnly = false);
int getIoArrayImplicitSize() const;
void checkIoArrayConsistency(const TSourceLoc&, int requiredSize, const char* feature, TType&, const TString&);
TIntermTyped* handleBinaryMath(const TSourceLoc&, const char* str, TOperator op, TIntermTyped* left, TIntermTyped* right);
TIntermTyped* handleUnaryMath(const TSourceLoc&, const char* str, TOperator op, TIntermTyped* childNode);
TIntermTyped* handleDotDereference(const TSourceLoc&, TIntermTyped* base, const TString& field);
TFunction* handleFunctionDeclarator(const TSourceLoc&, TFunction& function, bool prototype);
TIntermAggregate* handleFunctionDefinition(const TSourceLoc&, TFunction&);
void handleFunctionArgument(TFunction*, TIntermTyped*& arguments, TIntermTyped* newArg);
TIntermTyped* handleFunctionCall(const TSourceLoc&, TFunction*, TIntermNode*);
void decomposeIntrinsic(const TSourceLoc&, TIntermTyped*& node, TIntermNode* arguments);
TIntermTyped* handleLengthMethod(const TSourceLoc&, TFunction*, TIntermNode*);
void addInputArgumentConversions(const TFunction&, TIntermNode*&) const;
TIntermTyped* addOutputArgumentConversions(const TFunction&, TIntermAggregate&) const;
void builtInOpCheck(const TSourceLoc&, const TFunction&, TIntermOperator&);
TFunction* handleConstructorCall(const TSourceLoc&, const TType&);
void handleSemantic(TType& type, const TString& semantic);
bool parseVectorFields(const TSourceLoc&, const TString&, int vecSize, TVectorFields&);
void assignError(const TSourceLoc&, const char* op, TString left, TString right);
void unaryOpError(const TSourceLoc&, const char* op, TString operand);
void binaryOpError(const TSourceLoc&, const char* op, TString left, TString right);
void variableCheck(TIntermTyped*& nodePtr);
void constantValueCheck(TIntermTyped* node, const char* token);
void integerCheck(const TIntermTyped* node, const char* token);
void globalCheck(const TSourceLoc&, const char* token);
bool constructorError(const TSourceLoc&, TIntermNode*, TFunction&, TOperator, TType&);
bool constructorTextureSamplerError(const TSourceLoc&, const TFunction&);
void arraySizeCheck(const TSourceLoc&, TIntermTyped* expr, TArraySize&);
void arraySizeRequiredCheck(const TSourceLoc&, const TArraySizes&);
void structArrayCheck(const TSourceLoc&, const TType& structure);
void arrayDimMerge(TType& type, const TArraySizes* sizes);
bool voidErrorCheck(const TSourceLoc&, const TString&, TBasicType);
void boolCheck(const TSourceLoc&, const TIntermTyped*);
void globalQualifierFix(const TSourceLoc&, TQualifier&);
bool structQualifierErrorCheck(const TSourceLoc&, const TPublicType& pType);
void mergeQualifiers(const TSourceLoc&, TQualifier& dst, const TQualifier& src, bool force);
int computeSamplerTypeIndex(TSampler&);
TSymbol* redeclareBuiltinVariable(const TSourceLoc&, const TString&, const TQualifier&, const TShaderQualifiers&, bool& newDeclaration);
void redeclareBuiltinBlock(const TSourceLoc&, TTypeList& typeList, const TString& blockName, const TString* instanceName, TArraySizes* arraySizes);
void paramCheckFix(const TSourceLoc&, const TStorageQualifier&, TType& type);
void paramCheckFix(const TSourceLoc&, const TQualifier&, TType& type);
void specializationCheck(const TSourceLoc&, const TType&, const char* op);
void setLayoutQualifier(const TSourceLoc&, TPublicType&, TString&);
void setLayoutQualifier(const TSourceLoc&, TPublicType&, TString&, const TIntermTyped*);
void mergeObjectLayoutQualifiers(TQualifier& dest, const TQualifier& src, bool inheritOnly);
void checkNoShaderLayouts(const TSourceLoc&, const TShaderQualifiers&);
const TFunction* findFunction(const TSourceLoc& loc, const TFunction& call, bool& builtIn);
TIntermNode* declareVariable(const TSourceLoc&, TString& identifier, const TType&, TArraySizes* typeArray = 0, TIntermTyped* initializer = 0);
TIntermTyped* addConstructor(const TSourceLoc&, TIntermNode*, const TType&, TOperator);
TIntermTyped* constructAggregate(TIntermNode*, const TType&, int, const TSourceLoc&);
TIntermTyped* constructBuiltIn(const TType&, TOperator, TIntermTyped*, const TSourceLoc&, bool subset);
void declareBlock(const TSourceLoc&, TTypeList& typeList, const TString* instanceName = 0, TArraySizes* arraySizes = 0);
void fixBlockLocations(const TSourceLoc&, TQualifier&, TTypeList&, bool memberWithLocation, bool memberWithoutLocation);
void fixBlockXfbOffsets(TQualifier&, TTypeList&);
void fixBlockUniformOffsets(TQualifier&, TTypeList&);
void addQualifierToExisting(const TSourceLoc&, TQualifier, const TString& identifier);
void addQualifierToExisting(const TSourceLoc&, TQualifier, TIdentifierList&);
void updateStandaloneQualifierDefaults(const TSourceLoc&, const TPublicType&);
void wrapupSwitchSubsequence(TIntermAggregate* statements, TIntermNode* branchNode);
TIntermNode* addSwitch(const TSourceLoc&, TIntermTyped* expression, TIntermAggregate* body);
void updateImplicitArraySize(const TSourceLoc&, TIntermNode*, int index);
void nestLooping() { ++loopNestingLevel; }
void unnestLooping() { --loopNestingLevel; }
void pushScope() { symbolTable.push(); }
void popScope() { symbolTable.pop(0); }
protected:
void inheritGlobalDefaults(TQualifier& dst) const;
TVariable* makeInternalVariable(const char* name, const TType&) const;
TVariable* declareNonArray(const TSourceLoc&, TString& identifier, TType&, bool& newDeclaration);
void declareArray(const TSourceLoc&, TString& identifier, const TType&, TSymbol*&, bool& newDeclaration);
TIntermNode* executeInitializer(const TSourceLoc&, TIntermTyped* initializer, TVariable* variable);
TIntermTyped* convertInitializerList(const TSourceLoc&, const TType&, TIntermTyped* initializer);
TOperator mapTypeToConstructorOp(const TType&) const;
void outputMessage(const TSourceLoc&, const char* szReason, const char* szToken,
const char* szExtraInfoFormat, TPrefixType prefix,
va_list args);
// Current state of parsing
struct TPragma contextPragma;
int loopNestingLevel; // 0 if outside all loops
int structNestingLevel; // 0 if outside blocks and structures
int controlFlowNestingLevel; // 0 if outside all flow control
TList<TIntermSequence*> switchSequenceStack; // case, node, case, case, node, ...; ensure only one node between cases; stack of them for nesting
TList<int> switchLevel; // the statementNestingLevel the current switch statement is at, which must match the level of its case statements
bool inEntrypoint; // if inside a function, true if the function is the entry point
bool postMainReturn; // if inside a function, true if the function is the entry point and this is after a return statement
const TType* currentFunctionType; // the return type of the function that's currently being parsed
bool functionReturnsValue; // true if a non-void function has a return
const TString* blockName;
TQualifier currentBlockQualifier;
TBuiltInResource resources;
TLimits& limits;
HlslParseContext(HlslParseContext&);
HlslParseContext& operator=(HlslParseContext&);
TMap<TString, TExtensionBehavior> extensionBehavior; // for each extension string, what its current behavior is set to
static const int maxSamplerIndex = EsdNumDims * (EbtNumTypes * (2 * 2 * 2)); // see computeSamplerTypeIndex()
bool afterEOF;
TQualifier globalBufferDefaults;
TQualifier globalUniformDefaults;
TQualifier globalInputDefaults;
TQualifier globalOutputDefaults;
TString currentCaller; // name of last function body entered (not valid when at global scope)
TIdSetType inductiveLoopIds;
TVector<TIntermTyped*> needsIndexLimitationChecking;
//
// Geometry shader input arrays:
// - array sizing is based on input primitive and/or explicit size
//
// Tessellation control output arrays:
// - array sizing is based on output layout(vertices=...) and/or explicit size
//
// Both:
// - array sizing is retroactive
// - built-in block redeclarations interact with this
//
// Design:
// - use a per-context "resize-list", a list of symbols whose array sizes
// can be fixed
//
// - the resize-list starts empty at beginning of user-shader compilation, it does
// not have built-ins in it
//
// - on built-in array use: copyUp() symbol and add it to the resize-list
//
// - on user array declaration: add it to the resize-list
//
// - on block redeclaration: copyUp() symbol and add it to the resize-list
// * note, that appropriately gives an error if redeclaring a block that
// was already used and hence already copied-up
//
// - on seeing a layout declaration that sizes the array, fix everything in the
// resize-list, giving errors for mismatch
//
// - on seeing an array size declaration, give errors on mismatch between it and previous
// array-sizing declarations
//
TVector<TSymbol*> ioArraySymbolResizeList;
};
} // end namespace glslang
#endif // HLSL_PARSE_INCLUDED_
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