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kc3-lang/angle/src/compiler/ParseHelper.cpp
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shannonwoods@chromium.org
Date : 2013-05-30 00:21:17
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Message : Eliminated an unused parameter. TRAC #23185 Signed-off-by: Geoff Lang Signed-off-by: Shannon Woods Author: Nicolas Capens git-svn-id: https://angleproject.googlecode.com/svn/branches/es3proto@2410 736b8ea6-26fd-11df-bfd4-992fa37f6226
- src/compiler/ParseHelper.cpp
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// // Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // #include "compiler/ParseHelper.h" #include <stdarg.h> #include <stdio.h> #include "compiler/glslang.h" #include "compiler/preprocessor/SourceLocation.h" /////////////////////////////////////////////////////////////////////// // // Sub- vector and matrix fields // //////////////////////////////////////////////////////////////////////// // // Look at a '.' field selector string and change it into offsets // for a vector. // bool TParseContext::parseVectorFields(const TString& compString, int vecSize, TVectorFields& fields, int line) { fields.num = (int) compString.size(); if (fields.num > 4) { error(line, "illegal vector field selection", compString.c_str()); return false; } enum { exyzw, ergba, estpq } fieldSet[4]; for (int i = 0; i < fields.num; ++i) { switch (compString[i]) { case 'x': fields.offsets[i] = 0; fieldSet[i] = exyzw; break; case 'r': fields.offsets[i] = 0; fieldSet[i] = ergba; break; case 's': fields.offsets[i] = 0; fieldSet[i] = estpq; break; case 'y': fields.offsets[i] = 1; fieldSet[i] = exyzw; break; case 'g': fields.offsets[i] = 1; fieldSet[i] = ergba; break; case 't': fields.offsets[i] = 1; fieldSet[i] = estpq; break; case 'z': fields.offsets[i] = 2; fieldSet[i] = exyzw; break; case 'b': fields.offsets[i] = 2; fieldSet[i] = ergba; break; case 'p': fields.offsets[i] = 2; fieldSet[i] = estpq; break; case 'w': fields.offsets[i] = 3; fieldSet[i] = exyzw; break; case 'a': fields.offsets[i] = 3; fieldSet[i] = ergba; break; case 'q': fields.offsets[i] = 3; fieldSet[i] = estpq; break; default: error(line, "illegal vector field selection", compString.c_str()); return false; } } for (int i = 0; i < fields.num; ++i) { if (fields.offsets[i] >= vecSize) { error(line, "vector field selection out of range", compString.c_str()); return false; } if (i > 0) { if (fieldSet[i] != fieldSet[i-1]) { error(line, "illegal - vector component fields not from the same set", compString.c_str()); return false; } } } return true; } // // Look at a '.' field selector string and change it into offsets // for a matrix. // bool TParseContext::parseMatrixFields(const TString& compString, int matCols, int matRows, TMatrixFields& fields, int line) { fields.wholeRow = false; fields.wholeCol = false; fields.row = -1; fields.col = -1; if (compString.size() != 2) { error(line, "illegal length of matrix field selection", compString.c_str()); return false; } if (compString[0] == '_') { if (compString[1] < '0' || compString[1] > '3') { error(line, "illegal matrix field selection", compString.c_str()); return false; } fields.wholeCol = true; fields.col = compString[1] - '0'; } else if (compString[1] == '_') { if (compString[0] < '0' || compString[0] > '3') { error(line, "illegal matrix field selection", compString.c_str()); return false; } fields.wholeRow = true; fields.row = compString[0] - '0'; } else { if (compString[0] < '0' || compString[0] > '3' || compString[1] < '0' || compString[1] > '3') { error(line, "illegal matrix field selection", compString.c_str()); return false; } fields.row = compString[0] - '0'; fields.col = compString[1] - '0'; } if (fields.row >= matRows || fields.col >= matCols) { error(line, "matrix field selection out of range", compString.c_str()); return false; } return true; } /////////////////////////////////////////////////////////////////////// // // Errors // //////////////////////////////////////////////////////////////////////// // // Track whether errors have occurred. // void TParseContext::recover() { } // // Used by flex/bison to output all syntax and parsing errors. // void TParseContext::error(TSourceLoc loc, const char* reason, const char* token, const char* extraInfo) { pp::SourceLocation srcLoc; DecodeSourceLoc(loc, &srcLoc.file, &srcLoc.line); diagnostics.writeInfo(pp::Diagnostics::ERROR, srcLoc, reason, token, extraInfo); } void TParseContext::warning(TSourceLoc loc, const char* reason, const char* token, const char* extraInfo) { pp::SourceLocation srcLoc; DecodeSourceLoc(loc, &srcLoc.file, &srcLoc.line); diagnostics.writeInfo(pp::Diagnostics::WARNING, srcLoc, reason, token, extraInfo); } void TParseContext::trace(const char* str) { diagnostics.writeDebug(str); } // // Same error message for all places assignments don't work. // void TParseContext::assignError(int line, const char* op, TString left, TString right) { std::stringstream extraInfoStream; extraInfoStream << "cannot convert from '" << right << "' to '" << left << "'"; std::string extraInfo = extraInfoStream.str(); error(line, "", op, extraInfo.c_str()); } // // Same error message for all places unary operations don't work. // void TParseContext::unaryOpError(int line, const char* op, TString operand) { std::stringstream extraInfoStream; extraInfoStream << "no operation '" << op << "' exists that takes an operand of type " << operand << " (or there is no acceptable conversion)"; std::string extraInfo = extraInfoStream.str(); error(line, " wrong operand type", op, extraInfo.c_str()); } // // Same error message for all binary operations don't work. // void TParseContext::binaryOpError(int line, const char* op, TString left, TString right) { std::stringstream extraInfoStream; extraInfoStream << "no operation '" << op << "' exists that takes a left-hand operand of type '" << left << "' and a right operand of type '" << right << "' (or there is no acceptable conversion)"; std::string extraInfo = extraInfoStream.str(); error(line, " wrong operand types ", op, extraInfo.c_str()); } bool TParseContext::precisionErrorCheck(int line, TPrecision precision, TBasicType type){ if (!checksPrecisionErrors) return false; switch( type ){ case EbtFloat: if( precision == EbpUndefined ){ error( line, "No precision specified for (float)", "" ); return true; } break; case EbtInt: if( precision == EbpUndefined ){ error( line, "No precision specified (int)", "" ); return true; } break; default: return false; } return false; } // // Both test and if necessary, spit out an error, to see if the node is really // an l-value that can be operated on this way. // // Returns true if the was an error. // bool TParseContext::lValueErrorCheck(int line, const char* op, TIntermTyped* node) { TIntermSymbol* symNode = node->getAsSymbolNode(); TIntermBinary* binaryNode = node->getAsBinaryNode(); if (binaryNode) { bool errorReturn; switch(binaryNode->getOp()) { case EOpIndexDirect: case EOpIndexIndirect: case EOpIndexDirectStruct: case EOpIndexDirectInterfaceBlock: return lValueErrorCheck(line, op, binaryNode->getLeft()); case EOpVectorSwizzle: errorReturn = lValueErrorCheck(line, op, binaryNode->getLeft()); if (!errorReturn) { int offset[4] = {0,0,0,0}; TIntermTyped* rightNode = binaryNode->getRight(); TIntermAggregate *aggrNode = rightNode->getAsAggregate(); for (TIntermSequence::iterator p = aggrNode->getSequence().begin(); p != aggrNode->getSequence().end(); p++) { int value = (*p)->getAsTyped()->getAsConstantUnion()->getIConst(0); offset[value]++; if (offset[value] > 1) { error(line, " l-value of swizzle cannot have duplicate components", op); return true; } } } return errorReturn; default: break; } error(line, " l-value required", op); return true; } const char* symbol = 0; if (symNode != 0) symbol = symNode->getSymbol().c_str(); const char* message = 0; switch (node->getQualifier()) { case EvqConst: message = "can't modify a const"; break; case EvqConstReadOnly: message = "can't modify a const"; break; case EvqAttribute: message = "can't modify an attribute"; break; case EvqUniform: message = "can't modify a uniform"; break; case EvqVaryingIn: message = "can't modify a varying"; break; case EvqInput: message = "can't modify an input"; break; case EvqFragCoord: message = "can't modify gl_FragCoord"; break; case EvqFrontFacing: message = "can't modify gl_FrontFacing"; break; case EvqPointCoord: message = "can't modify gl_PointCoord"; break; default: // // Type that can't be written to? // switch (node->getBasicType()) { case EbtSampler2D: case EbtSamplerCube: message = "can't modify a sampler"; break; case EbtVoid: message = "can't modify void"; break; default: break; } } if (message == 0 && binaryNode == 0 && symNode == 0) { error(line, " l-value required", op); return true; } // // Everything else is okay, no error. // if (message == 0) return false; // // If we get here, we have an error and a message. // if (symNode) { std::stringstream extraInfoStream; extraInfoStream << "\"" << symbol << "\" (" << message << ")"; std::string extraInfo = extraInfoStream.str(); error(line, " l-value required", op, extraInfo.c_str()); } else { std::stringstream extraInfoStream; extraInfoStream << "(" << message << ")"; std::string extraInfo = extraInfoStream.str(); error(line, " l-value required", op, extraInfo.c_str()); } return true; } // // Both test, and if necessary spit out an error, to see if the node is really // a constant. // // Returns true if the was an error. // bool TParseContext::constErrorCheck(TIntermTyped* node) { if (node->getQualifier() == EvqConst) return false; error(node->getLine(), "constant expression required", ""); return true; } // // Both test, and if necessary spit out an error, to see if the node is really // an integer. // // Returns true if the was an error. // bool TParseContext::integerErrorCheck(TIntermTyped* node, const char* token) { if (node->isScalarInt()) return false; error(node->getLine(), "integer expression required", token); return true; } // // Both test, and if necessary spit out an error, to see if we are currently // globally scoped. // // Returns true if the was an error. // bool TParseContext::globalErrorCheck(int line, bool global, const char* token) { if (global) return false; error(line, "only allowed at global scope", token); return true; } // // For now, keep it simple: if it starts "gl_", it's reserved, independent // of scope. Except, if the symbol table is at the built-in push-level, // which is when we are parsing built-ins. // Also checks for "webgl_" and "_webgl_" reserved identifiers if parsing a // webgl shader. // // Returns true if there was an error. // bool TParseContext::reservedErrorCheck(int line, const TString& identifier) { static const char* reservedErrMsg = "reserved built-in name"; if (!symbolTable.atBuiltInLevel()) { if (identifier.compare(0, 3, "gl_") == 0) { error(line, reservedErrMsg, "gl_"); return true; } if (isWebGLBasedSpec(shaderSpec)) { if (identifier.compare(0, 6, "webgl_") == 0) { error(line, reservedErrMsg, "webgl_"); return true; } if (identifier.compare(0, 7, "_webgl_") == 0) { error(line, reservedErrMsg, "_webgl_"); return true; } if (shaderSpec == SH_CSS_SHADERS_SPEC && identifier.compare(0, 4, "css_") == 0) { error(line, reservedErrMsg, "css_"); return true; } } if (identifier.find("__") != TString::npos) { error(line, "identifiers containing two consecutive underscores (__) are reserved as possible future keywords", identifier.c_str()); return true; } } return false; } // // Make sure there is enough data provided to the constructor to build // something of the type of the constructor. Also returns the type of // the constructor. // // Returns true if there was an error in construction. // bool TParseContext::constructorErrorCheck(int line, TIntermNode* node, TFunction& function, TOperator op, TType* type) { *type = function.getReturnType(); bool constructingMatrix = false; switch(op) { case EOpConstructMat2: case EOpConstructMat3: case EOpConstructMat4: constructingMatrix = true; break; default: break; } // // Note: It's okay to have too many components available, but not okay to have unused // arguments. 'full' will go to true when enough args have been seen. If we loop // again, there is an extra argument, so 'overfull' will become true. // int size = 0; bool constType = true; bool full = false; bool overFull = false; bool matrixInMatrix = false; bool arrayArg = false; for (size_t i = 0; i < function.getParamCount(); ++i) { const TParameter& param = function.getParam(i); size += param.type->getObjectSize(); if (constructingMatrix && param.type->isMatrix()) matrixInMatrix = true; if (full) overFull = true; if (op != EOpConstructStruct && !type->isArray() && size >= type->getObjectSize()) full = true; if (param.type->getQualifier() != EvqConst) constType = false; if (param.type->isArray()) arrayArg = true; } if (constType) type->setQualifier(EvqConst); if (type->isArray() && static_cast<size_t>(type->getArraySize()) != function.getParamCount()) { error(line, "array constructor needs one argument per array element", "constructor"); return true; } if (arrayArg && op != EOpConstructStruct) { error(line, "constructing from a non-dereferenced array", "constructor"); return true; } if (matrixInMatrix && !type->isArray()) { if (function.getParamCount() != 1) { error(line, "constructing matrix from matrix can only take one argument", "constructor"); return true; } } if (overFull) { error(line, "too many arguments", "constructor"); return true; } if (op == EOpConstructStruct && !type->isArray() && int(type->getStruct()->size()) != function.getParamCount()) { error(line, "Number of constructor parameters does not match the number of structure fields", "constructor"); return true; } if (!type->isMatrix() || !matrixInMatrix) { if ((op != EOpConstructStruct && size != 1 && size < type->getObjectSize()) || (op == EOpConstructStruct && size < type->getObjectSize())) { error(line, "not enough data provided for construction", "constructor"); return true; } } TIntermTyped *typed = node ? node->getAsTyped() : 0; if (typed == 0) { error(line, "constructor argument does not have a type", "constructor"); return true; } if (op != EOpConstructStruct && IsSampler(typed->getBasicType())) { error(line, "cannot convert a sampler", "constructor"); return true; } if (typed->getBasicType() == EbtVoid) { error(line, "cannot convert a void", "constructor"); return true; } return false; } // This function checks to see if a void variable has been declared and raise an error message for such a case // // returns true in case of an error // bool TParseContext::voidErrorCheck(int line, const TString& identifier, const TPublicType& pubType) { if (pubType.type == EbtVoid) { error(line, "illegal use of type 'void'", identifier.c_str()); return true; } return false; } // This function checks to see if the node (for the expression) contains a scalar boolean expression or not // // returns true in case of an error // bool TParseContext::boolErrorCheck(int line, const TIntermTyped* type) { if (type->getBasicType() != EbtBool || type->isArray() || type->isMatrix() || type->isVector()) { error(line, "boolean expression expected", ""); return true; } return false; } // This function checks to see if the node (for the expression) contains a scalar boolean expression or not // // returns true in case of an error // bool TParseContext::boolErrorCheck(int line, const TPublicType& pType) { if (pType.type != EbtBool || pType.isAggregate()) { error(line, "boolean expression expected", ""); return true; } return false; } bool TParseContext::samplerErrorCheck(int line, const TPublicType& pType, const char* reason) { if (pType.type == EbtStruct) { if (containsSampler(*pType.userDef)) { error(line, reason, getBasicString(pType.type), "(structure contains a sampler)"); return true; } return false; } else if (IsSampler(pType.type)) { error(line, reason, getBasicString(pType.type)); return true; } return false; } bool TParseContext::structQualifierErrorCheck(int line, const TPublicType& pType) { if ((pType.qualifier == EvqVaryingIn || pType.qualifier == EvqVaryingOut || pType.qualifier == EvqAttribute) && pType.type == EbtStruct) { error(line, "cannot be used with a structure", getQualifierString(pType.qualifier)); return true; } if (pType.qualifier != EvqUniform && samplerErrorCheck(line, pType, "samplers must be uniform")) return true; return false; } bool TParseContext::parameterSamplerErrorCheck(int line, TQualifier qualifier, const TType& type) { if ((qualifier == EvqOut || qualifier == EvqInOut) && type.getBasicType() != EbtStruct && IsSampler(type.getBasicType())) { error(line, "samplers cannot be output parameters", type.getBasicString()); return true; } return false; } bool TParseContext::containsSampler(TType& type) { if (IsSampler(type.getBasicType())) return true; if (type.getBasicType() == EbtStruct || type.getBasicType() == EbtInterfaceBlock) { TTypeList& structure = *type.getStruct(); for (unsigned int i = 0; i < structure.size(); ++i) { if (containsSampler(*structure[i].type)) return true; } } return false; } // // Do size checking for an array type's size. // // Returns true if there was an error. // bool TParseContext::arraySizeErrorCheck(int line, TIntermTyped* expr, int& size) { TIntermConstantUnion* constant = expr->getAsConstantUnion(); if (constant == 0 || !constant->isScalarInt()) { error(line, "array size must be a constant integer expression", ""); return true; } if (constant->getBasicType() == EbtUInt) { unsigned int uintSize = constant->getUConst(0); if (uintSize > static_cast<unsigned int>(std::numeric_limits<int>::max())) { error(line, "array size too large", ""); size = 1; return true; } size = static_cast<int>(uintSize); } else { size = constant->getIConst(0); if (size <= 0) { error(line, "array size must be a positive integer", ""); size = 1; return true; } } return false; } // // See if this qualifier can be an array. // // Returns true if there is an error. // bool TParseContext::arrayQualifierErrorCheck(int line, TPublicType type) { if ((type.qualifier == EvqAttribute) || (type.qualifier == EvqConst)) { error(line, "cannot declare arrays of this qualifier", TType(type).getCompleteString().c_str()); return true; } return false; } // // See if this type can be an array. // // Returns true if there is an error. // bool TParseContext::arrayTypeErrorCheck(int line, TPublicType type) { // // Can the type be an array? // if (type.array) { error(line, "cannot declare arrays of arrays", TType(type).getCompleteString().c_str()); return true; } return false; } // // Do all the semantic checking for declaring an array, with and // without a size, and make the right changes to the symbol table. // // size == 0 means no specified size. // // Returns true if there was an error. // bool TParseContext::arrayErrorCheck(int line, TString& identifier, TPublicType type, TVariable*& variable) { // // Don't check for reserved word use until after we know it's not in the symbol table, // because reserved arrays can be redeclared. // bool builtIn = false; bool sameScope = false; TSymbol* symbol = symbolTable.find(identifier, 0, &builtIn, &sameScope); if (symbol == 0 || !sameScope) { if (reservedErrorCheck(line, identifier)) return true; variable = new TVariable(&identifier, TType(type)); if (type.arraySize) variable->getType().setArraySize(type.arraySize); if (! symbolTable.declare(*variable)) { delete variable; error(line, "INTERNAL ERROR inserting new symbol", identifier.c_str()); return true; } } else { if (! symbol->isVariable()) { error(line, "variable expected", identifier.c_str()); return true; } variable = static_cast<TVariable*>(symbol); if (! variable->getType().isArray()) { error(line, "redeclaring non-array as array", identifier.c_str()); return true; } if (variable->getType().getArraySize() > 0) { error(line, "redeclaration of array with size", identifier.c_str()); return true; } if (! variable->getType().sameElementType(TType(type))) { error(line, "redeclaration of array with a different type", identifier.c_str()); return true; } TType* t = variable->getArrayInformationType(); while (t != 0) { if (t->getMaxArraySize() > type.arraySize) { error(line, "higher index value already used for the array", identifier.c_str()); return true; } t->setArraySize(type.arraySize); t = t->getArrayInformationType(); } if (type.arraySize) variable->getType().setArraySize(type.arraySize); } if (voidErrorCheck(line, identifier, type)) return true; return false; } bool TParseContext::arraySetMaxSize(TIntermSymbol *node, TType* type, int size, bool updateFlag, TSourceLoc line) { bool builtIn = false; TSymbol* symbol = symbolTable.find(node->getSymbol(), 0, &builtIn); if (symbol == 0) { error(line, " undeclared identifier", node->getSymbol().c_str()); return true; } TVariable* variable = static_cast<TVariable*>(symbol); type->setArrayInformationType(variable->getArrayInformationType()); variable->updateArrayInformationType(type); // special casing to test index value of gl_FragData. If the accessed index is >= gl_MaxDrawBuffers // its an error if (node->getSymbol() == "gl_FragData") { TSymbol* fragData = symbolTable.find("gl_MaxDrawBuffers", 0, &builtIn); ASSERT(fragData); int fragDataValue = static_cast<TVariable*>(fragData)->getConstPointer()[0].getIConst(); if (fragDataValue <= size) { error(line, "", "[", "gl_FragData can only have a max array size of up to gl_MaxDrawBuffers"); return true; } } // we dont want to update the maxArraySize when this flag is not set, we just want to include this // node type in the chain of node types so that its updated when a higher maxArraySize comes in. if (!updateFlag) return false; size++; variable->getType().setMaxArraySize(size); type->setMaxArraySize(size); TType* tt = type; while(tt->getArrayInformationType() != 0) { tt = tt->getArrayInformationType(); tt->setMaxArraySize(size); } return false; } // // Enforce non-initializer type/qualifier rules. // // Returns true if there was an error. // bool TParseContext::nonInitConstErrorCheck(int line, TString& identifier, TPublicType& type, bool array) { if (type.qualifier == EvqConst) { // Make the qualifier make sense. type.qualifier = EvqTemporary; if (array) { error(line, "arrays may not be declared constant since they cannot be initialized", identifier.c_str()); } else if (type.isStructureContainingArrays()) { error(line, "structures containing arrays may not be declared constant since they cannot be initialized", identifier.c_str()); } else { error(line, "variables with qualifier 'const' must be initialized", identifier.c_str()); } return true; } return false; } // // Do semantic checking for a variable declaration that has no initializer, // and update the symbol table. // // Returns true if there was an error. // bool TParseContext::nonInitErrorCheck(int line, TString& identifier, TPublicType& type, TVariable*& variable) { if (reservedErrorCheck(line, identifier)) recover(); variable = new TVariable(&identifier, TType(type)); if (! symbolTable.declare(*variable)) { error(line, "redefinition", variable->getName().c_str()); delete variable; variable = 0; return true; } if (voidErrorCheck(line, identifier, type)) return true; return false; } bool TParseContext::paramErrorCheck(int line, TQualifier qualifier, TQualifier paramQualifier, TType* type) { if (qualifier != EvqConst && qualifier != EvqTemporary) { error(line, "qualifier not allowed on function parameter", getQualifierString(qualifier)); return true; } if (qualifier == EvqConst && paramQualifier != EvqIn) { error(line, "qualifier not allowed with ", getQualifierString(qualifier), getQualifierString(paramQualifier)); return true; } if (qualifier == EvqConst) type->setQualifier(EvqConstReadOnly); else type->setQualifier(paramQualifier); return false; } bool TParseContext::extensionErrorCheck(int line, const TString& extension) { const TExtensionBehavior& extBehavior = extensionBehavior(); TExtensionBehavior::const_iterator iter = extBehavior.find(extension.c_str()); if (iter == extBehavior.end()) { error(line, "extension", extension.c_str(), "is not supported"); return true; } // In GLSL ES, an extension's default behavior is "disable". if (iter->second == EBhDisable || iter->second == EBhUndefined) { error(line, "extension", extension.c_str(), "is disabled"); return true; } if (iter->second == EBhWarn) { warning(line, "extension", extension.c_str(), "is being used"); return false; } return false; } bool TParseContext::supportsExtension(const char* extension) { const TExtensionBehavior& extbehavior = extensionBehavior(); TExtensionBehavior::const_iterator iter = extbehavior.find(extension); return (iter != extbehavior.end()); } void TParseContext::handleExtensionDirective(int line, const char* extName, const char* behavior) { pp::SourceLocation loc; DecodeSourceLoc(line, &loc.file, &loc.line); directiveHandler.handleExtension(loc, extName, behavior); } void TParseContext::handlePragmaDirective(int line, const char* name, const char* value) { pp::SourceLocation loc; DecodeSourceLoc(line, &loc.file, &loc.line); directiveHandler.handlePragma(loc, name, value); } ///////////////////////////////////////////////////////////////////////////////// // // Non-Errors. // ///////////////////////////////////////////////////////////////////////////////// // // Look up a function name in the symbol table, and make sure it is a function. // // Return the function symbol if found, otherwise 0. // const TFunction* TParseContext::findFunction(int line, TFunction* call, int shaderVersion, bool *builtIn) { // First find by unmangled name to check whether the function name has been // hidden by a variable name or struct typename. const TSymbol* symbol = symbolTable.find(call->getName(), shaderVersion, builtIn); if (symbol == 0) { symbol = symbolTable.find(call->getMangledName(), shaderVersion, builtIn); } if (symbol == 0) { error(line, "no matching overloaded function found", call->getName().c_str()); return 0; } if (!symbol->isFunction()) { error(line, "function name expected", call->getName().c_str()); return 0; } return static_cast<const TFunction*>(symbol); } // // Initializers show up in several places in the grammar. Have one set of // code to handle them here. // bool TParseContext::executeInitializer(TSourceLoc line, TString& identifier, TPublicType& pType, TIntermTyped* initializer, TIntermNode*& intermNode, TVariable* variable) { TType type = TType(pType); if (variable == 0) { if (reservedErrorCheck(line, identifier)) return true; if (voidErrorCheck(line, identifier, pType)) return true; // // add variable to symbol table // variable = new TVariable(&identifier, type); if (! symbolTable.declare(*variable)) { error(line, "redefinition", variable->getName().c_str()); return true; // don't delete variable, it's used by error recovery, and the pool // pop will take care of the memory } } // // identifier must be of type constant, a global, or a temporary // TQualifier qualifier = variable->getType().getQualifier(); if ((qualifier != EvqTemporary) && (qualifier != EvqGlobal) && (qualifier != EvqConst)) { error(line, " cannot initialize this type of qualifier ", variable->getType().getQualifierString()); return true; } // // test for and propagate constant // if (qualifier == EvqConst) { if (qualifier != initializer->getType().getQualifier()) { std::stringstream extraInfoStream; extraInfoStream << "'" << variable->getType().getCompleteString() << "'"; std::string extraInfo = extraInfoStream.str(); error(line, " assigning non-constant to", "=", extraInfo.c_str()); variable->getType().setQualifier(EvqTemporary); return true; } if (type != initializer->getType()) { error(line, " non-matching types for const initializer ", variable->getType().getQualifierString()); variable->getType().setQualifier(EvqTemporary); return true; } if (initializer->getAsConstantUnion()) { ConstantUnion* unionArray = variable->getConstPointer(); if (type.getObjectSize() == 1 && type.getBasicType() != EbtStruct) { *unionArray = (initializer->getAsConstantUnion()->getUnionArrayPointer())[0]; } else { variable->shareConstPointer(initializer->getAsConstantUnion()->getUnionArrayPointer()); } } else if (initializer->getAsSymbolNode()) { const TSymbol* symbol = symbolTable.find(initializer->getAsSymbolNode()->getSymbol(), 0); const TVariable* tVar = static_cast<const TVariable*>(symbol); ConstantUnion* constArray = tVar->getConstPointer(); variable->shareConstPointer(constArray); } else { std::stringstream extraInfoStream; extraInfoStream << "'" << variable->getType().getCompleteString() << "'"; std::string extraInfo = extraInfoStream.str(); error(line, " cannot assign to", "=", extraInfo.c_str()); variable->getType().setQualifier(EvqTemporary); return true; } } if (qualifier != EvqConst) { TIntermSymbol* intermSymbol = intermediate.addSymbol(variable->getUniqueId(), variable->getName(), variable->getType(), line); intermNode = intermediate.addAssign(EOpInitialize, intermSymbol, initializer, line); if (intermNode == 0) { assignError(line, "=", intermSymbol->getCompleteString(), initializer->getCompleteString()); return true; } } else intermNode = 0; return false; } bool TParseContext::areAllChildConst(TIntermAggregate* aggrNode) { ASSERT(aggrNode != NULL); if (!aggrNode->isConstructor()) return false; bool allConstant = true; // check if all the child nodes are constants so that they can be inserted into // the parent node TIntermSequence &sequence = aggrNode->getSequence() ; for (TIntermSequence::iterator p = sequence.begin(); p != sequence.end(); ++p) { if (!(*p)->getAsTyped()->getAsConstantUnion()) return false; } return allConstant; } TPublicType TParseContext::addFullySpecifiedType(TQualifier qualifier, const TPublicType& typeSpecifier) { TPublicType returnType = typeSpecifier; returnType.qualifier = qualifier; if (typeSpecifier.array) { error(typeSpecifier.line, "not supported", "first-class array"); recover(); returnType.setArray(false); } if (shaderVersion < 300) { if (qualifier == EvqAttribute && (typeSpecifier.type == EbtBool || typeSpecifier.type == EbtInt)) { error(typeSpecifier.line, "cannot be bool or int", getQualifierString(qualifier)); recover(); } if ((qualifier == EvqVaryingIn || qualifier == EvqVaryingOut) && (typeSpecifier.type == EbtBool || typeSpecifier.type == EbtInt)) { error(typeSpecifier.line, "cannot be bool or int", getQualifierString(qualifier)); recover(); } } else { if (qualifier == EvqAttribute && typeSpecifier.type == EbtBool) { error(typeSpecifier.line, "cannot be bool", getQualifierString(qualifier)); recover(); } if ((qualifier == EvqVaryingIn || qualifier == EvqVaryingOut) && typeSpecifier.type == EbtBool) { error(typeSpecifier.line, "cannot be bool", getQualifierString(qualifier)); recover(); } } return returnType; } TFunction *TParseContext::addConstructorFunc(TPublicType publicType) { TOperator op = EOpNull; if (publicType.userDef) { op = EOpConstructStruct; } else { switch (publicType.type) { case EbtFloat: if (publicType.isMatrix()) { // TODO: non-square matrices switch(publicType.getCols()) { case 2: op = EOpConstructMat2; break; case 3: op = EOpConstructMat3; break; case 4: op = EOpConstructMat4; break; } } else { switch(publicType.getNominalSize()) { case 1: op = EOpConstructFloat; break; case 2: op = EOpConstructVec2; break; case 3: op = EOpConstructVec3; break; case 4: op = EOpConstructVec4; break; } } break; case EbtInt: switch(publicType.getNominalSize()) { case 1: op = EOpConstructInt; break; case 2: op = EOpConstructIVec2; break; case 3: op = EOpConstructIVec3; break; case 4: op = EOpConstructIVec4; break; } break; case EbtUInt: switch(publicType.getNominalSize()) { case 1: op = EOpConstructUnsignedInt; break; case 2: op = EOpConstructUVec2; break; case 3: op = EOpConstructUVec3; break; case 4: op = EOpConstructUVec4; break; } break; case EbtBool: switch(publicType.getNominalSize()) { case 1: op = EOpConstructBool; break; case 2: op = EOpConstructBVec2; break; case 3: op = EOpConstructBVec3; break; case 4: op = EOpConstructBVec4; break; } break; default: break; } if (op == EOpNull) { error(publicType.line, "cannot construct this type", getBasicString(publicType.type)); recover(); publicType.type = EbtFloat; op = EOpConstructFloat; } } TString tempString; TType type(publicType); return new TFunction(&tempString, type, op); } // This function is used to test for the correctness of the parameters passed to various constructor functions // and also convert them to the right datatype if it is allowed and required. // // Returns 0 for an error or the constructed node (aggregate or typed) for no error. // TIntermTyped* TParseContext::addConstructor(TIntermNode* node, const TType* type, TOperator op, TFunction* fnCall, TSourceLoc line) { if (node == 0) return 0; TIntermAggregate* aggrNode = node->getAsAggregate(); TTypeList::const_iterator memberTypes; if (op == EOpConstructStruct) memberTypes = type->getStruct()->begin(); TType elementType = *type; if (type->isArray()) elementType.clearArrayness(); bool singleArg; if (aggrNode) { if (aggrNode->getOp() != EOpNull || aggrNode->getSequence().size() == 1) singleArg = true; else singleArg = false; } else singleArg = true; TIntermTyped *newNode; if (singleArg) { // If structure constructor or array constructor is being called // for only one parameter inside the structure, we need to call constructStruct function once. if (type->isArray()) newNode = constructStruct(node, &elementType, 1, node->getLine(), false); else if (op == EOpConstructStruct) newNode = constructStruct(node, (*memberTypes).type, 1, node->getLine(), false); else newNode = constructBuiltIn(type, op, node, node->getLine(), false); if (newNode && newNode->getAsAggregate()) { TIntermTyped* constConstructor = foldConstConstructor(newNode->getAsAggregate(), *type); if (constConstructor) return constConstructor; } return newNode; } // // Handle list of arguments. // TIntermSequence &sequenceVector = aggrNode->getSequence() ; // Stores the information about the parameter to the constructor // if the structure constructor contains more than one parameter, then construct // each parameter int paramCount = 0; // keeps a track of the constructor parameter number being checked // for each parameter to the constructor call, check to see if the right type is passed or convert them // to the right type if possible (and allowed). // for structure constructors, just check if the right type is passed, no conversion is allowed. for (TIntermSequence::iterator p = sequenceVector.begin(); p != sequenceVector.end(); p++, paramCount++) { if (type->isArray()) newNode = constructStruct(*p, &elementType, paramCount+1, node->getLine(), true); else if (op == EOpConstructStruct) newNode = constructStruct(*p, (memberTypes[paramCount]).type, paramCount+1, node->getLine(), true); else newNode = constructBuiltIn(type, op, *p, node->getLine(), true); if (newNode) { *p = newNode; } } TIntermTyped* constructor = intermediate.setAggregateOperator(aggrNode, op, line); TIntermTyped* constConstructor = foldConstConstructor(constructor->getAsAggregate(), *type); if (constConstructor) return constConstructor; return constructor; } TIntermTyped* TParseContext::foldConstConstructor(TIntermAggregate* aggrNode, const TType& type) { bool canBeFolded = areAllChildConst(aggrNode); aggrNode->setType(type); if (canBeFolded) { bool returnVal = false; ConstantUnion* unionArray = new ConstantUnion[type.getObjectSize()]; if (aggrNode->getSequence().size() == 1) { returnVal = intermediate.parseConstTree(aggrNode->getLine(), aggrNode, unionArray, aggrNode->getOp(), type, true); } else { returnVal = intermediate.parseConstTree(aggrNode->getLine(), aggrNode, unionArray, aggrNode->getOp(), type); } if (returnVal) return 0; return intermediate.addConstantUnion(unionArray, type, aggrNode->getLine()); } return 0; } // Function for constructor implementation. Calls addUnaryMath with appropriate EOp value // for the parameter to the constructor (passed to this function). Essentially, it converts // the parameter types correctly. If a constructor expects an int (like ivec2) and is passed a // float, then float is converted to int. // // Returns 0 for an error or the constructed node. // TIntermTyped* TParseContext::constructBuiltIn(const TType* type, TOperator op, TIntermNode* node, TSourceLoc line, bool subset) { TIntermTyped* newNode; TOperator basicOp; // // First, convert types as needed. // switch (op) { case EOpConstructVec2: case EOpConstructVec3: case EOpConstructVec4: case EOpConstructMat2: case EOpConstructMat3: case EOpConstructMat4: case EOpConstructFloat: basicOp = EOpConstructFloat; break; case EOpConstructIVec2: case EOpConstructIVec3: case EOpConstructIVec4: case EOpConstructInt: basicOp = EOpConstructInt; break; case EOpConstructUVec2: case EOpConstructUVec3: case EOpConstructUVec4: case EOpConstructUnsignedInt: basicOp = EOpConstructUnsignedInt; break; case EOpConstructBVec2: case EOpConstructBVec3: case EOpConstructBVec4: case EOpConstructBool: basicOp = EOpConstructBool; break; default: error(line, "unsupported construction", ""); recover(); return 0; } newNode = intermediate.addUnaryMath(basicOp, node, node->getLine()); if (newNode == 0) { error(line, "can't convert", "constructor"); return 0; } // // Now, if there still isn't an operation to do the construction, and we need one, add one. // // Otherwise, skip out early. if (subset || (newNode != node && newNode->getType() == *type)) return newNode; // setAggregateOperator will insert a new node for the constructor, as needed. return intermediate.setAggregateOperator(newNode, op, line); } // This function tests for the type of the parameters to the structures constructors. Raises // an error message if the expected type does not match the parameter passed to the constructor. // // Returns 0 for an error or the input node itself if the expected and the given parameter types match. // TIntermTyped* TParseContext::constructStruct(TIntermNode* node, TType* type, int paramCount, TSourceLoc line, bool subset) { if (*type == node->getAsTyped()->getType()) { if (subset) return node->getAsTyped(); else return intermediate.setAggregateOperator(node->getAsTyped(), EOpConstructStruct, line); } else { std::stringstream extraInfoStream; extraInfoStream << "cannot convert parameter " << paramCount << " from '" << node->getAsTyped()->getType().getBasicString() << "' to '" << type->getBasicString() << "'"; std::string extraInfo = extraInfoStream.str(); error(line, "", "constructor", extraInfo.c_str()); recover(); } return 0; } // // This function returns the tree representation for the vector field(s) being accessed from contant vector. // If only one component of vector is accessed (v.x or v[0] where v is a contant vector), then a contant node is // returned, else an aggregate node is returned (for v.xy). The input to this function could either be the symbol // node or it could be the intermediate tree representation of accessing fields in a constant structure or column of // a constant matrix. // TIntermTyped* TParseContext::addConstVectorNode(TVectorFields& fields, TIntermTyped* node, TSourceLoc line) { TIntermTyped* typedNode; TIntermConstantUnion* tempConstantNode = node->getAsConstantUnion(); ConstantUnion *unionArray; if (tempConstantNode) { unionArray = tempConstantNode->getUnionArrayPointer(); if (!unionArray) { return node; } } else { // The node has to be either a symbol node or an aggregate node or a tempConstant node, else, its an error error(line, "Cannot offset into the vector", "Error"); recover(); return 0; } ConstantUnion* constArray = new ConstantUnion[fields.num]; for (int i = 0; i < fields.num; i++) { if (fields.offsets[i] >= node->getType().getObjectSize()) { std::stringstream extraInfoStream; extraInfoStream << "vector field selection out of range '" << fields.offsets[i] << "'"; std::string extraInfo = extraInfoStream.str(); error(line, "", "[", extraInfo.c_str()); recover(); fields.offsets[i] = 0; } constArray[i] = unionArray[fields.offsets[i]]; } typedNode = intermediate.addConstantUnion(constArray, node->getType(), line); return typedNode; } // // This function returns the column being accessed from a constant matrix. The values are retrieved from // the symbol table and parse-tree is built for a vector (each column of a matrix is a vector). The input // to the function could either be a symbol node (m[0] where m is a constant matrix)that represents a // constant matrix or it could be the tree representation of the constant matrix (s.m1[0] where s is a constant structure) // TIntermTyped* TParseContext::addConstMatrixNode(int index, TIntermTyped* node, TSourceLoc line) { TIntermTyped* typedNode; TIntermConstantUnion* tempConstantNode = node->getAsConstantUnion(); if (index >= node->getType().getCols()) { std::stringstream extraInfoStream; extraInfoStream << "matrix field selection out of range '" << index << "'"; std::string extraInfo = extraInfoStream.str(); error(line, "", "[", extraInfo.c_str()); recover(); index = 0; } if (tempConstantNode) { ConstantUnion* unionArray = tempConstantNode->getUnionArrayPointer(); int size = tempConstantNode->getType().getCols(); typedNode = intermediate.addConstantUnion(&unionArray[size*index], tempConstantNode->getType(), line); } else { error(line, "Cannot offset into the matrix", "Error"); recover(); return 0; } return typedNode; } // // This function returns an element of an array accessed from a constant array. The values are retrieved from // the symbol table and parse-tree is built for the type of the element. The input // to the function could either be a symbol node (a[0] where a is a constant array)that represents a // constant array or it could be the tree representation of the constant array (s.a1[0] where s is a constant structure) // TIntermTyped* TParseContext::addConstArrayNode(int index, TIntermTyped* node, TSourceLoc line) { TIntermTyped* typedNode; TIntermConstantUnion* tempConstantNode = node->getAsConstantUnion(); TType arrayElementType = node->getType(); arrayElementType.clearArrayness(); if (index >= node->getType().getArraySize()) { std::stringstream extraInfoStream; extraInfoStream << "array field selection out of range '" << index << "'"; std::string extraInfo = extraInfoStream.str(); error(line, "", "[", extraInfo.c_str()); recover(); index = 0; } int arrayElementSize = arrayElementType.getObjectSize(); if (tempConstantNode) { ConstantUnion* unionArray = tempConstantNode->getUnionArrayPointer(); typedNode = intermediate.addConstantUnion(&unionArray[arrayElementSize * index], tempConstantNode->getType(), line); } else { error(line, "Cannot offset into the array", "Error"); recover(); return 0; } return typedNode; } // // This function returns the value of a particular field inside a constant structure from the symbol table. // If there is an embedded/nested struct, it appropriately calls addConstStructNested or addConstStructFromAggr // function and returns the parse-tree with the values of the embedded/nested struct. // TIntermTyped* TParseContext::addConstStruct(const TString &identifier, TIntermTyped *node, TSourceLoc line) { const TTypeList* fields = node->getType().getStruct(); TIntermTyped *typedNode; int instanceSize = 0; unsigned int index = 0; TIntermConstantUnion *tempConstantNode = node->getAsConstantUnion(); for ( index = 0; index < fields->size(); ++index) { if ((*fields)[index].type->getFieldName() == identifier) { break; } else { instanceSize += (*fields)[index].type->getObjectSize(); } } if (tempConstantNode) { ConstantUnion* constArray = tempConstantNode->getUnionArrayPointer(); typedNode = intermediate.addConstantUnion(constArray+instanceSize, tempConstantNode->getType(), line); // type will be changed in the calling function } else { error(line, "Cannot offset into the structure", "Error"); recover(); return 0; } return typedNode; } // // Interface/uniform blocks // TIntermAggregate* TParseContext::addInterfaceBlock(const TPublicType& typeQualifier, TSourceLoc nameLine, const TString& blockName, TTypeList* typeList, const TString& instanceName, TSourceLoc instanceLine, TIntermTyped* arrayIndex, TSourceLoc arrayIndexLine) { if (reservedErrorCheck(nameLine, blockName)) recover(); if (typeQualifier.qualifier != EvqUniform) { error(typeQualifier.line, "invalid qualifier:", getQualifierString(typeQualifier.qualifier), "interface blocks must be uniform"); recover(); } TSymbol* blockNameSymbol = new TInterfaceBlockName(&blockName); if (!symbolTable.declare(*blockNameSymbol)) { error(nameLine, "redefinition", blockName.c_str(), "interface block name"); recover(); } // check for sampler types for (size_t memberIndex = 0; memberIndex < typeList->size(); ++memberIndex) { const TTypeLine& memberTypeLine = (*typeList)[memberIndex]; TType* memberType = memberTypeLine.type; if (IsSampler(memberType->getBasicType())) { error(memberTypeLine.line, "unsupported type", memberType->getBasicString(), "sampler types are not allowed in interface blocks"); recover(); } const TQualifier qualifier = memberTypeLine.type->getQualifier(); switch (qualifier) { case EvqGlobal: case EvqUniform: break; default: error(memberTypeLine.line, "invalid qualifier on interface block member", getQualifierString(qualifier)); recover(); break; } } TType* interfaceBlock = new TType(typeList, blockName); interfaceBlock->setBasicType(EbtInterfaceBlock); interfaceBlock->setQualifier(typeQualifier.qualifier); TString symbolName = ""; int symbolId = 0; if (instanceName == "") { // define symbols for the members of the interface block for (size_t memberIndex = 0; memberIndex < typeList->size(); ++memberIndex) { const TTypeLine& memberTypeLine = (*typeList)[memberIndex]; TType* memberType = memberTypeLine.type; memberType->setInterfaceBlockType(interfaceBlock); TVariable* memberVariable = new TVariable(&memberType->getFieldName(), *memberType); memberVariable->setQualifier(typeQualifier.qualifier); if (!symbolTable.declare(*memberVariable)) { error(memberTypeLine.line, "redefinition", memberType->getFieldName().c_str(), "interface block member name"); recover(); } } } else { interfaceBlock->setInstanceName(instanceName); // add array index if (arrayIndex != NULL) { int size; if (arraySizeErrorCheck(arrayIndexLine, arrayIndex, size)) recover(); interfaceBlock->setArraySize(size); } // add a symbol for this interface block TVariable* instanceTypeDef = new TVariable(&instanceName, *interfaceBlock, false); instanceTypeDef->setQualifier(typeQualifier.qualifier); if (!symbolTable.declare(*instanceTypeDef)) { error(instanceLine, "redefinition", instanceName.c_str(), "interface block instance name"); recover(); } symbolId = instanceTypeDef->getUniqueId(); symbolName = instanceTypeDef->getName(); } exitStructDeclaration(); TIntermAggregate *aggregate = intermediate.makeAggregate(intermediate.addSymbol(symbolId, symbolName, *interfaceBlock, typeQualifier.line), nameLine); aggregate->setOp(EOpDeclaration); return aggregate; } bool TParseContext::enterStructDeclaration(int line, const TString& identifier) { ++structNestingLevel; // Embedded structure definitions are not supported per GLSL ES spec. // They aren't allowed in GLSL either, but we need to detect this here // so we don't rely on the GLSL compiler to catch it. if (structNestingLevel > 1) { error(line, "", "Embedded struct definitions are not allowed"); return true; } return false; } void TParseContext::exitStructDeclaration() { --structNestingLevel; } namespace { const int kWebGLMaxStructNesting = 4; } // namespace bool TParseContext::structNestingErrorCheck(TSourceLoc line, const TType& fieldType) { if (!isWebGLBasedSpec(shaderSpec)) { return false; } if (fieldType.getBasicType() != EbtStruct) { return false; } // We're already inside a structure definition at this point, so add // one to the field's struct nesting. if (1 + fieldType.getDeepestStructNesting() > kWebGLMaxStructNesting) { std::stringstream extraInfoStream; extraInfoStream << "Reference of struct type " << fieldType.getTypeName() << " exceeds maximum struct nesting of " << kWebGLMaxStructNesting; std::string extraInfo = extraInfoStream.str(); error(line, "", "", extraInfo.c_str()); return true; } return false; } // // Parse an array index expression // TIntermTyped* TParseContext::addIndexExpression(TIntermTyped *baseExpression, TSourceLoc location, TIntermTyped *indexExpression) { TIntermTyped *indexedExpression = NULL; if (!baseExpression->isArray() && !baseExpression->isMatrix() && !baseExpression->isVector()) { if (baseExpression->getAsSymbolNode()) { error(location, " left of '[' is not of type array, matrix, or vector ", baseExpression->getAsSymbolNode()->getSymbol().c_str()); } else { error(location, " left of '[' is not of type array, matrix, or vector ", "expression"); } recover(); } if (baseExpression->getType().getQualifier() == EvqConst && indexExpression->getQualifier() == EvqConst) { if (baseExpression->isArray()) { // constant folding for arrays indexedExpression = addConstArrayNode(indexExpression->getAsConstantUnion()->getIConst(0), baseExpression, location); } else if (baseExpression->isVector()) { // constant folding for vectors TVectorFields fields; fields.num = 1; fields.offsets[0] = indexExpression->getAsConstantUnion()->getIConst(0); // need to do it this way because v.xy sends fields integer array indexedExpression = addConstVectorNode(fields, baseExpression, location); } else if (baseExpression->isMatrix()) { // constant folding for matrices indexedExpression = addConstMatrixNode(indexExpression->getAsConstantUnion()->getIConst(0), baseExpression, location); } } else { if (indexExpression->getQualifier() == EvqConst) { const bool isMatrixOrVector = (baseExpression->isVector() || baseExpression->isMatrix()); const bool indexOOR = (isMatrixOrVector && baseExpression->getType().getNominalSize() <= indexExpression->getAsConstantUnion()->getIConst(0)); // check for index out-of-range if (indexOOR && !baseExpression->isArray()) { std::stringstream extraInfoStream; extraInfoStream << "field selection out of range '" << indexExpression->getAsConstantUnion()->getIConst(0) << "'"; std::string extraInfo = extraInfoStream.str(); error(location, "", "[", extraInfo.c_str()); recover(); } else { if (baseExpression->isArray()) { if (baseExpression->getType().getArraySize() == 0) { if (baseExpression->getType().getMaxArraySize() <= indexExpression->getAsConstantUnion()->getIConst(0)) { if (arraySetMaxSize(baseExpression->getAsSymbolNode(), baseExpression->getTypePointer(), indexExpression->getAsConstantUnion()->getIConst(0), true, location)) recover(); } else { if (arraySetMaxSize(baseExpression->getAsSymbolNode(), baseExpression->getTypePointer(), 0, false, location)) recover(); } } else if ( indexExpression->getAsConstantUnion()->getIConst(0) >= baseExpression->getType().getArraySize()) { std::stringstream extraInfoStream; extraInfoStream << "array index out of range '" << indexExpression->getAsConstantUnion()->getIConst(0) << "'"; std::string extraInfo = extraInfoStream.str(); error(location, "", "[", extraInfo.c_str()); recover(); } } indexedExpression = intermediate.addIndex(EOpIndexDirect, baseExpression, indexExpression, location); } } else { if (baseExpression->isArray() && baseExpression->getType().getArraySize() == 0) { error(location, "", "[", "array must be redeclared with a size before being indexed with a variable"); recover(); } else if (baseExpression->getBasicType() == EbtInterfaceBlock) { error(location, "", "[", "array indexes for interface blocks arrays must be constant integeral expressions"); recover(); } indexedExpression = intermediate.addIndex(EOpIndexIndirect, baseExpression, indexExpression, location); } } if (indexedExpression == 0) { ConstantUnion *unionArray = new ConstantUnion[1]; unionArray->setFConst(0.0f); indexedExpression = intermediate.addConstantUnion(unionArray, TType(EbtFloat, EbpHigh, EvqConst), location); } else if (baseExpression->isArray()) { if (baseExpression->getType().getStruct()) { TType copyOfType(baseExpression->getType().getStruct(), baseExpression->getType().getTypeName()); copyOfType.setBasicType(baseExpression->getType().getBasicType()); // necessary to preserve interface block basic type indexedExpression->setType(copyOfType); } else { indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(), EvqTemporary, baseExpression->getNominalSize(), baseExpression->getSecondarySize())); } if (baseExpression->getType().getQualifier() == EvqConst) { indexedExpression->getTypePointer()->setQualifier(EvqConst); } } else if (baseExpression->isMatrix() && baseExpression->getType().getQualifier() == EvqConst) { indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(), EvqConst, baseExpression->getRows())); } else if (baseExpression->isMatrix()) { indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(), EvqTemporary, baseExpression->getRows())); } else if (baseExpression->isVector() && baseExpression->getType().getQualifier() == EvqConst) { indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(), EvqConst)); } else if (baseExpression->isVector()) { indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(), EvqTemporary)); } else { indexedExpression->setType(baseExpression->getType()); } return indexedExpression; } TIntermTyped* TParseContext::addFieldSelectionExpression(TIntermTyped *baseExpression, TSourceLoc dotLocation, const TString &fieldString, TSourceLoc fieldLocation) { TIntermTyped *indexedExpression = NULL; if (baseExpression->isArray()) { error(fieldLocation, "cannot apply dot operator to an array", "."); recover(); } if (baseExpression->isVector()) { TVectorFields fields; if (!parseVectorFields(fieldString, baseExpression->getNominalSize(), fields, fieldLocation)) { fields.num = 1; fields.offsets[0] = 0; recover(); } if (baseExpression->getType().getQualifier() == EvqConst) { // constant folding for vector fields indexedExpression = addConstVectorNode(fields, baseExpression, fieldLocation); if (indexedExpression == 0) { recover(); indexedExpression = baseExpression; } else { indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(), EvqConst, (int) (fieldString).size())); } } else { TString vectorString = fieldString; TIntermTyped* index = intermediate.addSwizzle(fields, fieldLocation); indexedExpression = intermediate.addIndex(EOpVectorSwizzle, baseExpression, index, dotLocation); indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(), EvqTemporary, (int) vectorString.size())); } } else if (baseExpression->isMatrix()) { TMatrixFields fields; if (!parseMatrixFields(fieldString, baseExpression->getCols(), baseExpression->getRows(), fields, fieldLocation)) { fields.wholeRow = false; fields.wholeCol = false; fields.row = 0; fields.col = 0; recover(); } if (fields.wholeRow || fields.wholeCol) { error(dotLocation, " non-scalar fields not implemented yet", "."); recover(); ConstantUnion *unionArray = new ConstantUnion[1]; unionArray->setIConst(0); TIntermTyped* index = intermediate.addConstantUnion(unionArray, TType(EbtInt, EbpUndefined, EvqConst), fieldLocation); indexedExpression = intermediate.addIndex(EOpIndexDirect, baseExpression, index, dotLocation); indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(),EvqTemporary, baseExpression->getCols(), baseExpression->getRows())); } else { ConstantUnion *unionArray = new ConstantUnion[1]; unionArray->setIConst(fields.col * baseExpression->getRows() + fields.row); TIntermTyped* index = intermediate.addConstantUnion(unionArray, TType(EbtInt, EbpUndefined, EvqConst), fieldLocation); indexedExpression = intermediate.addIndex(EOpIndexDirect, baseExpression, index, dotLocation); indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision())); } } else if (baseExpression->getBasicType() == EbtStruct) { bool fieldFound = false; const TTypeList* fields = baseExpression->getType().getStruct(); if (fields == 0) { error(dotLocation, "structure has no fields", "Internal Error"); recover(); indexedExpression = baseExpression; } else { unsigned int i; for (i = 0; i < fields->size(); ++i) { if ((*fields)[i].type->getFieldName() == fieldString) { fieldFound = true; break; } } if (fieldFound) { if (baseExpression->getType().getQualifier() == EvqConst) { indexedExpression = addConstStruct(fieldString, baseExpression, dotLocation); if (indexedExpression == 0) { recover(); indexedExpression = baseExpression; } else { indexedExpression->setType(*(*fields)[i].type); // change the qualifier of the return type, not of the structure field // as the structure definition is shared between various structures. indexedExpression->getTypePointer()->setQualifier(EvqConst); } } else { ConstantUnion *unionArray = new ConstantUnion[1]; unionArray->setIConst(i); TIntermTyped* index = intermediate.addConstantUnion(unionArray, *(*fields)[i].type, fieldLocation); indexedExpression = intermediate.addIndex(EOpIndexDirectStruct, baseExpression, index, dotLocation); indexedExpression->setType(*(*fields)[i].type); } } else { error(dotLocation, " no such field in structure", fieldString.c_str()); recover(); indexedExpression = baseExpression; } } } else if (baseExpression->getBasicType() == EbtInterfaceBlock) { bool fieldFound = false; const TTypeList* fields = baseExpression->getType().getStruct(); if (fields == 0) { error(dotLocation, "interface block has no fields", "Internal Error"); recover(); indexedExpression = baseExpression; } else { unsigned int i; for (i = 0; i < fields->size(); ++i) { if ((*fields)[i].type->getFieldName() == fieldString) { fieldFound = true; break; } } if (fieldFound) { ConstantUnion *unionArray = new ConstantUnion[1]; unionArray->setIConst(i); TIntermTyped* index = intermediate.addConstantUnion(unionArray, *(*fields)[i].type, fieldLocation); indexedExpression = intermediate.addIndex(EOpIndexDirectInterfaceBlock, baseExpression, index, dotLocation); indexedExpression->setType(*(*fields)[i].type); } else { error(dotLocation, " no such field in interface block", fieldString.c_str()); recover(); indexedExpression = baseExpression; } } } else { if (shaderVersion < 300) { error(dotLocation, " field selection requires structure, vector, or matrix on left hand side", fieldString.c_str()); } else { error(dotLocation, " field selection requires structure, vector, matrix, or interface block on left hand side", fieldString.c_str()); } recover(); indexedExpression = baseExpression; } return indexedExpression; } TLayoutQualifierId TParseContext::addLayoutQualifierId(const TString &qualifierType, TSourceLoc qualifierTypeLine) { TLayoutQualifierId qualifierId; qualifierId.type = ElqError; qualifierId.location = -1; if (qualifierType == "shared") { qualifierId.type = ElqShared; } else if (qualifierType == "packed") { qualifierId.type = ElqPacked; } else if (qualifierType == "std140") { qualifierId.type = ElqStd140; } else if (qualifierType == "row_major") { qualifierId.type = ElqRowMajor; } else if (qualifierType == "column_major") { qualifierId.type = ElqColumnMajor; } else if (qualifierType == "location") { error(qualifierTypeLine, "invalid layout qualifier", qualifierType.c_str(), "location requires an argument"); recover(); } else { error(qualifierTypeLine, "invalid layout qualifier", qualifierType.c_str()); recover(); } return qualifierId; } TLayoutQualifierId TParseContext::addLayoutQualifierId(const TString &qualifierType, TSourceLoc qualifierTypeLine, const TString &intValueString, int intValue, TSourceLoc intValueLine) { TLayoutQualifierId qualifierId; qualifierId.type = ElqError; qualifierId.location = -1; if (qualifierType != "location") { error(qualifierTypeLine, "invalid layout qualifier", qualifierType.c_str(), "only location may have arguments"); recover(); } else { if (intValue < 0) { error(intValueLine, "out of range", intValueString.c_str(), "value must be non-negative and < MAX_DRAW_BUFFERS"); recover(); } else { qualifierId.location = intValue; } // TODO: must check that location is < MAX_DRAW_BUFFERS } return qualifierId; } TLayoutQualifier* TParseContext::makeLayoutQualifierFromId(TLayoutQualifierId layoutQualifierId) { return NULL; } TLayoutQualifier* TParseContext::extendLayoutQualifier(TLayoutQualifier *layoutQualifier, TLayoutQualifierId layoutQualifierId) { return NULL; } TTypeList *TParseContext::addStructDeclaratorList(const TPublicType& typeSpecifier, TTypeList *typeList) { if (voidErrorCheck(typeSpecifier.line, (*typeList)[0].type->getFieldName(), typeSpecifier)) { recover(); } for (unsigned int i = 0; i < typeList->size(); ++i) { // // Careful not to replace already known aspects of type, like array-ness // TType* type = (*typeList)[i].type; type->setBasicType(typeSpecifier.type); type->setPrimarySize(typeSpecifier.primarySize); type->setSecondarySize(typeSpecifier.secondarySize); type->setPrecision(typeSpecifier.precision); type->setQualifier(typeSpecifier.qualifier); // don't allow arrays of arrays if (type->isArray()) { if (arrayTypeErrorCheck(typeSpecifier.line, typeSpecifier)) recover(); } if (typeSpecifier.array) type->setArraySize(typeSpecifier.arraySize); if (typeSpecifier.userDef) { type->setStruct(typeSpecifier.userDef->getStruct()); type->setTypeName(typeSpecifier.userDef->getTypeName()); } if (structNestingErrorCheck(typeSpecifier.line, *type)) { recover(); } } return typeList; } TPublicType TParseContext::addStructure(TSourceLoc structLine, TSourceLoc nameLine, const TString &structName, TTypeList* typeList) { TType* structure = new TType(typeList, structName); if (!structName.empty()) { if (reservedErrorCheck(nameLine, structName)) { recover(); } TVariable* userTypeDef = new TVariable(&structName, *structure, true); if (!symbolTable.declare(*userTypeDef)) { error(nameLine, "redefinition", structName.c_str(), "struct"); recover(); } } // ensure we do not specify any storage qualifiers on the struct members for (unsigned int typeListIndex = 0; typeListIndex < typeList->size(); typeListIndex++) { const TTypeLine &typeLine = (*typeList)[typeListIndex]; const TQualifier qualifier = typeLine.type->getQualifier(); switch (qualifier) { case EvqGlobal: case EvqTemporary: break; default: error(typeLine.line, "invalid qualifier on struct member", getQualifierString(qualifier)); recover(); break; } } TPublicType publicType; publicType.setBasic(EbtStruct, EvqTemporary, structLine); publicType.userDef = structure; exitStructDeclaration(); return publicType; } // // Parse an array of strings using yyparse. // // Returns 0 for success. // int PaParseStrings(size_t count, const char* const string[], const int length[], TParseContext* context) { if ((count == 0) || (string == NULL)) return 1; if (glslang_initialize(context)) return 1; int error = glslang_scan(count, string, length, context); if (!error) error = glslang_parse(context); glslang_finalize(context); return (error == 0) && (context->numErrors() == 0) ? 0 : 1; }