qt-everywhere-src-5.15.1/qtxmlpatterns/src/xmlpatterns/parser/qparsercontext.cpp

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** This file is part of the QtXmlPatterns module of the Qt Toolkit.
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#include <QtGlobal>

#include "qexpression_p.h"
#include "qstaticcontext_p.h"
#include "qtokenizer_p.h"

#include "qparsercontext_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

ParserContext::ParserContext(const StaticContext::Ptr &context,
                             const QXmlQuery::QueryLanguage lang,
                             Tokenizer *const tokener) : staticContext(context)
                                                       , tokenizer(tokener)
                                                       , languageAccent(lang)
                                                       , nodeTestSource(BuiltinTypes::element)
                                                       , moduleNamespace(StandardNamespaces::empty)
                                                       , isPreviousEnclosedExpr(false)
                                                       , elementConstructorDepth(0)
                                                       , hasSecondPrologPart(false)
                                                       , preserveNamespacesMode(true)
                                                       , inheritNamespacesMode(true)
                                                       , isParsingPattern(false)
                                                       , currentImportPrecedence(1)
                                                       , m_evaluationCacheSlot(-1)
                                                       , m_expressionSlot(0)
                                                       , m_positionSlot(-1)
                                                       , m_globalVariableSlot(-1)
                                                       , m_currentTemplateID(InitialTemplateID)
{
    resolvers.push(context->namespaceBindings());
    Q_ASSERT(tokenizer);
    Q_ASSERT(context);
    m_isParsingWithParam.push(false);
    isBackwardsCompat.push(false);
}

void ParserContext::finalizePushedVariable(const int amount,
                                           const bool shouldPop)
{
    for(int i = 0; i < amount; ++i)
    {
        const VariableDeclaration::Ptr var(shouldPop ? variables.pop() : variables.top());
        Q_ASSERT(var);

        if(var->isUsed())
            continue;
        else
        {
            staticContext->warning(QtXmlPatterns::tr("The variable %1 is unused")
                                                     .arg(formatKeyword(var, staticContext->namePool())));
        }
    }
}

void ParserContext::handleStackOverflow(const char *, short **yyss, size_t,
                                        TokenValue **yyvs, size_t,
                                        XPATHLTYPE **yyls, size_t,
                                        size_t *yystacksize)
{
    bool isFirstTime = parserStack_yyvs.isEmpty();
    Q_ASSERT(*yystacksize < INT_MAX - 50);
    int new_yystacksize = static_cast<int>(*yystacksize) + 50;
    parserStack_yyss.resize(new_yystacksize);
    parserStack_yyvs.resize(new_yystacksize);
    parserStack_yyls.resize(new_yystacksize);
    if (isFirstTime) {
        for (int i = 0, ei = static_cast<int>(*yystacksize); i != ei; ++i) {
            parserStack_yyss[i] = (*yyss)[i];
            parserStack_yyvs[i] = (*yyvs)[i];
            parserStack_yyls[i] = (*yyls)[i];
        }
    }
    *yyss = parserStack_yyss.data();
    *yyvs = parserStack_yyvs.data();
    *yyls = parserStack_yyls.data();
    *yystacksize = new_yystacksize;
}

QT_END_NAMESPACE