diff options
Diffstat (limited to 'src/mesa/shader/slang/MachineIndependent/ParseHelper.cpp')
| -rwxr-xr-x | src/mesa/shader/slang/MachineIndependent/ParseHelper.cpp | 1452 |
1 files changed, 1452 insertions, 0 deletions
diff --git a/src/mesa/shader/slang/MachineIndependent/ParseHelper.cpp b/src/mesa/shader/slang/MachineIndependent/ParseHelper.cpp new file mode 100755 index 00000000000..cfc42746ae1 --- /dev/null +++ b/src/mesa/shader/slang/MachineIndependent/ParseHelper.cpp @@ -0,0 +1,1452 @@ +//
+//Copyright (C) 2002-2005 3Dlabs Inc. Ltd.
+//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.
+//
+
+#include "ParseHelper.h"
+#include "Include/InitializeParseContext.h"
+#include "osinclude.h"
+#include <stdarg.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 matSize, 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 >= matSize || fields.col >= matSize) {
+ error(line, "matrix field selection out of range", compString.c_str(), "");
+ return false;
+ }
+
+ return true;
+}
+
+///////////////////////////////////////////////////////////////////////
+//
+// Errors
+//
+////////////////////////////////////////////////////////////////////////
+
+//
+// Track whether errors have occurred.
+//
+void TParseContext::recover()
+{
+ recoveredFromError = true;
+}
+
+//
+// Used by flex/bison to output all syntax and parsing errors.
+//
+void C_DECL TParseContext::error(TSourceLoc nLine, const char *szReason, const char *szToken,
+ const char *szExtraInfoFormat, ...)
+{
+ char szExtraInfo[400];
+ va_list marker;
+
+ va_start(marker, szExtraInfoFormat);
+
+ _vsnprintf(szExtraInfo, sizeof(szExtraInfo), szExtraInfoFormat, marker);
+
+ /* VC++ format: file(linenum) : error #: 'token' : extrainfo */
+ infoSink.info.prefix(EPrefixError);
+ infoSink.info.location(nLine);
+ infoSink.info << "'" << szToken << "' : " << szReason << " " << szExtraInfo << "\n";
+
+ va_end(marker);
+
+ ++numErrors;
+}
+
+//
+// Same error message for all places assignments don't work.
+//
+void TParseContext::assignError(int line, const char* op, TString left, TString right)
+{
+ error(line, "", op, "cannot convert from '%s' to '%s'",
+ right.c_str(), left.c_str());
+}
+
+//
+// Same error message for all places unary operations don't work.
+//
+void TParseContext::unaryOpError(int line, char* op, TString operand)
+{
+ error(line, " wrong operand type", op,
+ "no operation '%s' exists that takes an operand of type %s (or there is no acceptable conversion)",
+ op, operand.c_str());
+}
+
+//
+// Same error message for all binary operations don't work.
+//
+void TParseContext::binaryOpError(int line, char* op, TString left, TString right)
+{
+ error(line, " wrong operand types ", op,
+ "no operation '%s' exists that takes a left-hand operand of type '%s' and "
+ "a right operand of type '%s' (or there is no acceptable conversion)",
+ op, left.c_str(), right.c_str());
+}
+
+//
+// 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, 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:
+ 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()->getUnionArrayPointer()->iConst;
+ 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();
+
+ 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 EvqFace: message = "can't modify gl_FrontFace"; break;
+ case EvqFragCoord: message = "can't modify gl_FragCoord"; break;
+ default:
+
+ //
+ // Type that can't be written to?
+ //
+ switch (node->getBasicType()) {
+ case EbtSampler1D:
+ case EbtSampler2D:
+ case EbtSampler3D:
+ case EbtSamplerCube:
+ case EbtSampler1DShadow:
+ case EbtSampler2DShadow:
+ 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)
+ error(line, " l-value required", op, "\"%s\" (%s)", symbol, message);
+ else
+ error(line, " l-value required", op, "(%s)", message);
+
+ 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, char* token)
+{
+ if (node->getBasicType() == EbtInt && node->getNominalSize() == 1)
+ 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, 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.
+//
+// Returns true if there was an error.
+//
+bool TParseContext::reservedErrorCheck(int line, const TString& identifier)
+{
+ if (symbolTable.atBuiltInLevel() ||
+ identifier.substr(0, 3) != TString("gl_"))
+ return false;
+
+ error(line, "reserved built-in name", "gl_", "");
+
+ return true;
+}
+
+//
+// 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)
+{
+ switch(op) {
+ case EOpConstructInt: *type = TType(EbtInt); break;
+ case EOpConstructBool: *type = TType(EbtBool); break;
+ case EOpConstructFloat: *type = TType(EbtFloat); break;
+ case EOpConstructVec2: *type = TType(EbtFloat, EvqTemporary, 2); break;
+ case EOpConstructVec3: *type = TType(EbtFloat, EvqTemporary, 3); break;
+ case EOpConstructVec4: *type = TType(EbtFloat, EvqTemporary, 4); break;
+ case EOpConstructBVec2: *type = TType(EbtBool, EvqTemporary, 2); break;
+ case EOpConstructBVec3: *type = TType(EbtBool, EvqTemporary, 3); break;
+ case EOpConstructBVec4: *type = TType(EbtBool, EvqTemporary, 4); break;
+ case EOpConstructIVec2: *type = TType(EbtInt, EvqTemporary, 2); break;
+ case EOpConstructIVec3: *type = TType(EbtInt, EvqTemporary, 3); break;
+ case EOpConstructIVec4: *type = TType(EbtInt, EvqTemporary, 4); break;
+ case EOpConstructMat2: *type = TType(EbtFloat, EvqTemporary, 2, true); break;
+ case EOpConstructMat3: *type = TType(EbtFloat, EvqTemporary, 3, true); break;
+ case EOpConstructMat4: *type = TType(EbtFloat, EvqTemporary, 4, true); break;
+ case EOpConstructStruct: *type = TType(function.getReturnType().getStruct(), function.getReturnType().getTypeName()); break;
+ default:
+ error(line, "expected constructor", "Internal Error", "");
+ return true;
+ }
+
+ 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;
+ for (int i = 0; i < function.getParamCount(); ++i) {
+ size += function[i].type->getInstanceSize();
+ if (constructingMatrix && function[i].type->isMatrix())
+ matrixInMatrix = true;
+ if (full)
+ overFull = true;
+ if (op != EOpConstructStruct && size >= type->getInstanceSize())
+ full = true;
+ if (function[i].type->getQualifier() != EvqConst)
+ constType = false;
+ }
+
+ if (constType)
+ type->changeQualifier(EvqConst);
+
+ if (matrixInMatrix) {
+ error(line, "constructing matrix from matrix", "constructor", "(reserved)");
+ return true;
+ }
+
+ if (overFull) {
+ error(line, "too many arguments", "constructor", "");
+ return true;
+ }
+
+ if (size != 1 && size < type->getInstanceSize() || (size < 1) && op == EOpConstructStruct) {
+ error(line, "not enough data provided for construction", "constructor", "");
+ return true;
+ }
+
+ TIntermTyped* typed = node->getAsTyped();
+ 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.array || pType.matrix || (pType.size > 1)) {
+ 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, TType::getBasicString(pType.type), "(structure contains a sampler)");
+
+ return true;
+ }
+
+ return false;
+ } else if (IsSampler(pType.type)) {
+ error(line, reason, TType::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) {
+ TTypeList& structure = *type.getStruct();
+ for (unsigned int i = 0; i < structure.size(); ++i) {
+ if (containsSampler(*structure[i].type))
+ return true;
+ }
+ }
+
+ return false;
+}
+
+bool TParseContext::insertBuiltInArrayAtGlobalLevel()
+{
+ TString *name = NewPoolTString("gl_TexCoord");
+ TSymbol* symbol = symbolTable.find(*name);
+ if (!symbol) {
+ error(0, "INTERNAL ERROR finding symbol", name->c_str(), "");
+ return true;
+ }
+ TVariable* variable = static_cast<TVariable*>(symbol);
+
+ TVariable* newVariable = new TVariable(name, variable->getType());
+
+ if (! symbolTable.insert(*newVariable)) {
+ delete newVariable;
+ error(0, "INTERNAL ERROR inserting new symbol", name->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, TIntermTyped* size)
+{
+ //
+ // Don't check for reserved word use until after we know it's not in the symbol table,
+ // because reserved arrays can be redeclared.
+ //
+
+ //
+ // Can the type be an array?
+ //
+ if (type.array || type.qualifier == EvqAttribute || type.qualifier == EvqConst) {
+ error(line, "cannot declare arrays of this type", TType(type).getCompleteString().c_str(), "");
+ return true;
+ }
+ type.array = true;
+
+ //
+ // size will be 0 if there is no size declared, otherwise it contains the size
+ // declared.
+ //
+ TIntermConstantUnion* constant = 0;
+ if (size) {
+ constant = size->getAsConstantUnion();
+ if (constant == 0 || constant->getBasicType() != EbtInt || constant->getUnionArrayPointer()->iConst <= 0) {
+ error(line, "array size must be a positive integer", identifier.c_str(), "");
+ return true;
+ }
+ }
+
+ bool builtIn = false;
+ bool sameScope = false;
+ TSymbol* symbol = symbolTable.find(identifier, &builtIn, &sameScope);
+ if (symbol == 0 || !sameScope) {
+ if (reservedErrorCheck(line, identifier))
+ return true;
+
+ TVariable* variable = new TVariable(&identifier, TType(type));
+
+ if (size)
+ variable->getType().setArraySize(constant->getUnionArrayPointer()->iConst);
+
+ if (! symbolTable.insert(*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;
+ }
+
+ TVariable* 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() != 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() > constant->getUnionArrayPointer()->iConst) {
+ error(line, "higher index value already used for the array", identifier.c_str(), "");
+ return true;
+ }
+ t->setArraySize(constant->getUnionArrayPointer()->iConst);
+ t = t->getArrayInformationType();
+ }
+
+ if (size)
+ variable->getType().setArraySize(constant->getUnionArrayPointer()->iConst);
+ }
+
+ 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(), &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);
+
+ // 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;
+}
+
+//
+// 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)
+{
+ if (reservedErrorCheck(line, identifier))
+ recover();
+
+ //
+ // Make the qualifier make sense, error is issued in a little bit.
+ //
+ bool constError = false;
+ if (type.qualifier == EvqConst) {
+ type.qualifier = EvqTemporary;
+ constError = true;
+ }
+
+ TVariable* variable = new TVariable(&identifier, TType(type));
+
+ if (! symbolTable.insert(*variable)) {
+ error(line, "redefinition", variable->getName().c_str(), "");
+ delete variable;
+ return true;
+ }
+ if (constError) {
+ error(line, "variables with qualifier 'const' must be initialized", identifier.c_str(), "");
+ 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->changeQualifier(EvqConstReadOnly);
+ else
+ type->changeQualifier(paramQualifier);
+
+ return false;
+}
+
+/////////////////////////////////////////////////////////////////////////////////
+//
+// 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, bool *builtIn)
+{
+ const TSymbol* symbol = symbolTable.find(call->getMangledName(), 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;
+ }
+
+ const TFunction* function = static_cast<const TFunction*>(symbol);
+
+ return function;
+}
+//
+// 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)
+{
+ if (reservedErrorCheck(line, identifier))
+ return true;
+
+ if (voidErrorCheck(line, identifier, pType))
+ return true;
+
+ //
+ // add variable to symbol table
+ //
+ TVariable* variable = new TVariable(&identifier, TType(pType));
+ if (! symbolTable.insert(*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()) {
+ error(line, " assigning non-constant to", "=", "'%s'", variable->getType().getCompleteString().c_str());
+ variable->getType().changeQualifier(EvqTemporary);
+ return true;
+ }
+ if (TType(pType) != initializer->getType()) {
+ error(line, " non-matching types for const initializer ",
+ variable->getType().getQualifierString(), "");
+ variable->getType().changeQualifier(EvqTemporary);
+ return true;
+ }
+ if (initializer->getAsConstantUnion()) {
+ constUnion* unionArray = variable->getConstPointer();
+
+ if (pType.size == 1 && TType(pType).getBasicType() != EbtStruct) {
+ switch (pType.type ) {
+ case EbtInt:
+ unionArray->iConst = (initializer->getAsConstantUnion()->getUnionArrayPointer())[0].iConst;
+ break;
+ case EbtFloat:
+ unionArray->fConst = (initializer->getAsConstantUnion()->getUnionArrayPointer())[0].fConst;
+ break;
+ case EbtBool:
+ unionArray->bConst = (initializer->getAsConstantUnion()->getUnionArrayPointer())[0].bConst;
+ break;
+ default:
+ error(line, " cannot initialize constant of this type", "", "");
+ return true;
+ }
+ } else {
+ variable->shareConstPointer(initializer->getAsConstantUnion()->getUnionArrayPointer());
+ }
+ } else if (initializer->getAsAggregate()) {
+ bool returnVal = false;
+ constUnion* unionArray = variable->getConstPointer();
+ if (initializer->getAsAggregate()->getSequence().size() == 1 && initializer->getAsAggregate()->getSequence()[0]->getAsTyped()->getAsConstantUnion()) {
+ returnVal = intermediate.parseConstTree(line, initializer, unionArray, initializer->getAsAggregate()->getOp(), symbolTable, variable->getType(), true);
+ }
+ else {
+ returnVal = intermediate.parseConstTree(line, initializer, unionArray, initializer->getAsAggregate()->getOp(), symbolTable, variable->getType());
+ }
+ intermNode = 0;
+ constUnion *arrayUnion = unionArray;
+ if (returnVal) {
+ arrayUnion = 0;
+ variable->getType().changeQualifier(EvqTemporary);
+ }
+ return returnVal;
+ } else if (initializer->getAsSymbolNode()) {
+ const TSymbol* symbol = symbolTable.find(initializer->getAsSymbolNode()->getSymbol());
+ const TVariable* tVar = static_cast<const TVariable*>(symbol);
+
+ constUnion* constArray = tVar->getConstPointer();
+ variable->shareConstPointer(constArray);
+ } else {
+ error(line, " assigning non-constant to", "=", "'%s'", variable->getType().getCompleteString().c_str());
+ variable->getType().changeQualifier(EvqTemporary);
+ return true;
+ }
+ }
+
+ if (qualifier != EvqConst) {
+ TIntermSymbol* intermSymbol = intermediate.addSymbol(variable->getUniqueId(), variable->getName(), variable->getType(), line);
+ intermNode = intermediate.addAssign(EOpAssign, intermSymbol, initializer, line);
+ if (intermNode == 0) {
+ assignError(line, "=", intermSymbol->getCompleteString(), initializer->getCompleteString());
+ return true;
+ }
+ } else
+ intermNode = 0;
+
+ return false;
+}
+
+//
+// This method checks to see if the given aggregate node has all its children nodes as constants
+// This method does not test if structure members are constant
+//
+bool TParseContext::canNodeBeRemoved(TIntermNode* childNode)
+{
+ TIntermAggregate *aggrNode = childNode->getAsAggregate();
+ if (!aggrNode)
+ return false;
+
+ if (!aggrNode->isConstructor() || aggrNode->getOp() == EOpConstructStruct)
+ return false;
+
+ bool allConstant = true;
+
+ // check if all the child nodes are constants so that they can be inserted into
+ // the parent node
+ if (aggrNode) {
+ TIntermSequence &childSequenceVector = aggrNode->getSequence() ;
+ for (TIntermSequence::iterator p = childSequenceVector.begin();
+ p != childSequenceVector.end(); p++) {
+ if (!(*p)->getAsTyped()->getAsConstantUnion())
+ return false;
+ }
+ }
+
+ return allConstant;
+}
+
+// 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, TType* type, TOperator op, TFunction* fnCall, TSourceLoc line)
+{
+ if (node == 0)
+ return 0;
+
+ TIntermAggregate* aggrNode = node->getAsAggregate();
+
+ TTypeList::iterator list;
+ TTypeList* structure = 0; // Store the information (vector) about the return type of the structure.
+ if (op == EOpConstructStruct) {
+ const TType& ttype = fnCall->getReturnType();
+ structure = ttype.getStruct();
+ list = (*structure).begin();
+ }
+
+ 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 (op == EOpConstructStruct) {
+ // If structure constructor is being called for only one parameter inside the structure,
+ // we need to call constructStruct function once.
+ if (structure->size() != 1) {
+ error(line, "Number of constructor parameters does not match the number of structure fields", "constructor", "");
+
+ return 0;
+ } else
+ return constructStruct(node, (*list).type, 1, node->getLine(), false);
+ } else {
+ newNode = constructBuiltIn(type, op, node, node->getLine(), false);
+ if (newNode && newNode->getAsAggregate()) {
+ if (canNodeBeRemoved(newNode->getAsAggregate()->getSequence()[0])) {
+ TIntermAggregate* returnAggNode = newNode->getAsAggregate()->getSequence()[0]->getAsAggregate();
+ newNode = intermediate.removeChildNode(newNode, type, returnAggNode);
+ }
+ }
+ 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
+ if (op == EOpConstructStruct) {
+ if (structure->size() != sequenceVector.size()) { // If the number of parameters to the constructor does not match the expected number of parameters
+ error(line, "Number of constructor parameters does not match the number of structure fields", "constructor", "");
+
+ return 0;
+ }
+ }
+
+ 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++) {
+ bool move = false;
+ if (op == EOpConstructStruct) {
+ newNode = constructStruct(*p, (list[paramCount]).type, paramCount+1, node->getLine(), true);
+ if (newNode)
+ move = true;
+ } else {
+ newNode = constructBuiltIn(type, op, *p, node->getLine(), true);
+
+ if (newNode) {
+ if (canNodeBeRemoved(newNode))
+ intermediate.removeChildNode(sequenceVector, *type, paramCount, p, newNode->getAsAggregate());
+ else
+ move = true;
+ }
+ }
+ if (move) {
+ sequenceVector.erase(p);
+ sequenceVector.insert(p, newNode);
+ }
+ }
+
+ return intermediate.setAggregateOperator(aggrNode, op, line);
+}
+
+// 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(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 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(), symbolTable);
+ 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 {
+ error(line, "", "constructor", "cannot convert parameter %d from '%s' to '%s'", paramCount,
+ node->getAsTyped()->getType().getBasicString(), type->getBasicString());
+ 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();
+ TIntermAggregate* aggregateNode = node->getAsAggregate();
+
+ constUnion *unionArray;
+ if (tempConstantNode) {
+ unionArray = tempConstantNode->getUnionArrayPointer();
+
+ if (!unionArray) { // this error message should never be raised
+ infoSink.info.message(EPrefixInternalError, "constUnion not initialized in addConstVectorNode function", line);
+ recover();
+
+ return node;
+ }
+ } else if (aggregateNode) { // if an aggregate node is present, the value has to be taken from the parse tree
+ // for a case like vec(4).xz
+ unionArray = new constUnion[aggregateNode->getType().getInstanceSize()];
+
+ bool returnVal = false;
+ if (aggregateNode->getAsAggregate()->getSequence().size() == 1 && aggregateNode->getAsAggregate()->getSequence()[0]->getAsTyped()->getAsConstantUnion()) {
+ returnVal = intermediate.parseConstTree(line, aggregateNode, unionArray, aggregateNode->getOp(), symbolTable, aggregateNode->getType(), true);
+ }
+ else {
+ returnVal = intermediate.parseConstTree(line, aggregateNode, unionArray, aggregateNode->getOp(), symbolTable, aggregateNode->getType());
+ }
+
+ if (returnVal)
+ return 0;
+
+ } else { // The node has to be either a symbol node or an aggregate node or a tempConstant node, else, its an error
+ error(line, "No aggregate or constant union node available", "Internal Error", "");
+ recover();
+
+ return 0;
+ }
+
+ constUnion* constArray = new constUnion[fields.num];
+
+ for (int i = 0; i < fields.num; i++) {
+ if (fields.offsets[i] >= node->getType().getInstanceSize()) {
+ error(line, "", "[", "vector field selection out of range '%d'", fields.offsets[i]);
+ 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();
+ TIntermAggregate* aggregateNode = node->getAsAggregate();
+
+ if (index >= node->getType().getNominalSize()) {
+ error(line, "", "[", "matrix field selection out of range '%d'", index);
+ recover();
+ index = 0;
+ }
+
+ if (tempConstantNode) {
+ constUnion* unionArray = tempConstantNode->getUnionArrayPointer();
+ int size = tempConstantNode->getType().getNominalSize();
+ typedNode = intermediate.addConstantUnion(&unionArray[size*index], tempConstantNode->getType(), line);
+ } else if (aggregateNode) {
+ // for a case like mat4(5)[0]
+ constUnion* unionArray = new constUnion[aggregateNode->getType().getInstanceSize()];
+ int size = aggregateNode->getType().getNominalSize();
+
+ bool returnVal = false;
+ if (aggregateNode->getAsAggregate()->getSequence().size() == 1 && aggregateNode->getAsAggregate()->getSequence()[0]->getAsTyped()->getAsConstantUnion()) {
+ returnVal = intermediate.parseConstTree(line, aggregateNode, unionArray, aggregateNode->getOp(), symbolTable, aggregateNode->getType(), true);
+ }
+ else {
+ returnVal = intermediate.parseConstTree(line, aggregateNode, unionArray, aggregateNode->getOp(), symbolTable, aggregateNode->getType());
+ }
+
+ if (!returnVal)
+ typedNode = intermediate.addConstantUnion(&unionArray[size*index], aggregateNode->getType(), line);
+ else
+ return 0;
+
+ } else {
+ error(line, "No Aggregate or Constant Union node available", "Internal 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(TString& identifier, TIntermTyped* node, TSourceLoc line)
+{
+ TTypeList* fields = node->getType().getStruct();
+ TIntermTyped *typedNode;
+ int instanceSize = 0;
+ unsigned int index = 0;
+ TIntermConstantUnion *tempConstantNode = node->getAsConstantUnion();
+ TIntermAggregate* aggregateNode = node->getAsAggregate();
+
+ for ( index = 0; index < fields->size(); ++index) {
+ if ((*fields)[index].type->getFieldName() == identifier) {
+ break;
+ } else {
+ if ((*fields)[index].type->getStruct())
+ //?? We should actually be calling getStructSize() function and not setStructSize. This problem occurs in case
+ // of nested/embedded structs.
+ instanceSize += (*fields)[index].type->setStructSize((*fields)[index].type->getStruct());
+ else
+ instanceSize += (*fields)[index].type->getInstanceSize();
+ }
+ }
+
+ if (tempConstantNode) {
+ constUnion* constArray = tempConstantNode->getUnionArrayPointer();
+
+ typedNode = intermediate.addConstantUnion(constArray+instanceSize, tempConstantNode->getType(), line); // type will be changed in the calling function
+ } else if (aggregateNode) {
+ // for a case like constStruct(1,v3).i where structure fields is int i and vec3 v3.
+
+ constUnion* unionArray = new constUnion[aggregateNode->getType().getStructSize()];
+
+ bool returnVal = false;
+ if (aggregateNode->getAsAggregate()->getSequence().size() == 1 && aggregateNode->getAsAggregate()->getSequence()[0]->getAsTyped()->getAsConstantUnion()) {
+ returnVal = intermediate.parseConstTree(line, aggregateNode, unionArray, aggregateNode->getOp(), symbolTable, aggregateNode->getType(), true);
+ }
+ else {
+ returnVal = intermediate.parseConstTree(line, aggregateNode, unionArray, aggregateNode->getOp(), symbolTable, aggregateNode->getType());
+ }
+
+ if (!returnVal)
+ typedNode = intermediate.addConstantUnion(unionArray+instanceSize, aggregateNode->getType(), line);
+ else
+ return 0;
+
+ } else {
+ error(line, "No Aggregate or Constant Union node available", "Internal Error", "");
+ recover();
+
+ return 0;
+ }
+
+ return typedNode;
+}
+
+//
+// Initialize all supported extensions to disable
+//
+void TParseContext::initializeExtensionBehavior()
+{
+ //
+ // example code: extensionBehavior["test"] = EDisable; // where "test" is the name of
+ // supported extension
+ //
+}
+
+OS_TLSIndex GlobalParseContextIndex = OS_INVALID_TLS_INDEX;
+
+bool InitializeParseContextIndex()
+{
+ if (GlobalParseContextIndex != OS_INVALID_TLS_INDEX) {
+ assert(0 && "InitializeParseContextIndex(): Parse Context already initalised");
+ return false;
+ }
+
+ //
+ // Allocate a TLS index.
+ //
+ GlobalParseContextIndex = OS_AllocTLSIndex();
+
+ if (GlobalParseContextIndex == OS_INVALID_TLS_INDEX) {
+ assert(0 && "InitializeParseContextIndex(): Parse Context already initalised");
+ return false;
+ }
+
+ return true;
+}
+
+bool InitializeGlobalParseContext()
+{
+ if (GlobalParseContextIndex == OS_INVALID_TLS_INDEX) {
+ assert(0 && "InitializeGlobalParseContext(): Parse Context index not initalised");
+ return false;
+ }
+
+ TThreadParseContext *lpParseContext = static_cast<TThreadParseContext *>(OS_GetTLSValue(GlobalParseContextIndex));
+ if (lpParseContext != 0) {
+ assert(0 && "InitializeParseContextIndex(): Parse Context already initalised");
+ return false;
+ }
+
+ TThreadParseContext *lpThreadData = new TThreadParseContext();
+ if (lpThreadData == 0) {
+ assert(0 && "InitializeGlobalParseContext(): Unable to create thread parse context");
+ return false;
+ }
+
+ lpThreadData->lpGlobalParseContext = 0;
+ OS_SetTLSValue(GlobalParseContextIndex, lpThreadData);
+
+ return true;
+}
+
+TParseContextPointer& GetGlobalParseContext()
+{
+ //
+ // Minimal error checking for speed
+ //
+
+ TThreadParseContext *lpParseContext = static_cast<TThreadParseContext *>(OS_GetTLSValue(GlobalParseContextIndex));
+
+ return lpParseContext->lpGlobalParseContext;
+}
+
+bool FreeParseContext()
+{
+ if (GlobalParseContextIndex == OS_INVALID_TLS_INDEX) {
+ assert(0 && "FreeParseContext(): Parse Context index not initalised");
+ return false;
+ }
+
+ TThreadParseContext *lpParseContext = static_cast<TThreadParseContext *>(OS_GetTLSValue(GlobalParseContextIndex));
+ if (lpParseContext)
+ delete lpParseContext;
+
+ return true;
+}
+
+bool FreeParseContextIndex()
+{
+ OS_TLSIndex tlsiIndex = GlobalParseContextIndex;
+
+ if (GlobalParseContextIndex == OS_INVALID_TLS_INDEX) {
+ assert(0 && "FreeParseContextIndex(): Parse Context index not initalised");
+ return false;
+ }
+
+ GlobalParseContextIndex = OS_INVALID_TLS_INDEX;
+
+ return OS_FreeTLSIndex(tlsiIndex);
+}
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