257 lines
8.3 KiB
C++
257 lines
8.3 KiB
C++
/*
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* Copyright (C) 2020-2022 Roy Qu (royqh1979@gmail.com)
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef CPPPREPROCESSOR_H
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#define CPPPREPROCESSOR_H
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#include <QObject>
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#include <QTextStream>
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#include "parserutils.h"
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#define MAX_DEFINE_EXPAND_DEPTH 20
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enum class DefineArgTokenType{
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Symbol,
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Identifier,
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Space,
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Sharp,
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DSharp,
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Other
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};
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struct DefineArgToken {
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QString value;
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DefineArgTokenType type;
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};
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using PDefineArgToken = std::shared_ptr<DefineArgToken>;
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struct ParsedFile {
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int index; // 0-based for programming convenience
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QString fileName; // Record filename, but not used now
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QStringList buffer; // do not concat them all
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int branches; //branch levels;
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PFileIncludes fileIncludes; // includes of this file
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};
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using PParsedFile = std::shared_ptr<ParsedFile>;
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class CppPreprocessor
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{
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enum class ContentType {
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AnsiCComment,
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CppComment,
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String,
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Character,
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EscapeSequence,
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RawStringPrefix,
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RawString,
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Other
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};
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public:
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explicit CppPreprocessor();
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CppPreprocessor(const CppPreprocessor&)=delete;
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CppPreprocessor& operator=(const CppPreprocessor&)=delete;
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void clear();
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void clearTempResults();
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void getDefineParts(const QString& input, QString &name, QString &args, QString &value);
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void addHardDefineByLine(const QString& line);
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void setScanOptions(bool parseSystem, bool parseLocal);
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void preprocess(const QString& fileName);
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void dumpDefinesTo(const QString& fileName) const;
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void dumpIncludesListTo(const QString& fileName) const;
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void addIncludePath(const QString& fileName);
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void addProjectIncludePath(const QString& fileName);
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void clearIncludePaths();
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void clearProjectIncludePaths();
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void removeScannedFile(const QString& filename);
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const QStringList& result() const{
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return mResult;
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};
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QHash<QString, PFileIncludes> &includesList();
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QSet<QString> &scannedFiles();
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const QSet<QString> &includePaths();
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const QSet<QString> &projectIncludePaths();
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const DefineMap &hardDefines() const;
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const QList<QString> &includePathList() const;
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const QList<QString> &projectIncludePathList() const;
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void setOnGetFileStream(const GetFileStreamCallBack &newOnGetFileStream);
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static QList<PDefineArgToken> tokenizeValue(const QString& value);
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private:
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void preprocessBuffer();
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void skipToEndOfPreprocessor();
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void skipToPreprocessor();
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QString getNextPreprocessor();
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void handleBranch(const QString& line);
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void handleDefine(const QString& line);
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void handleInclude(const QString& line, bool fromNext=false);
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void handlePreprocessor(const QString& value);
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void handleUndefine(const QString& line);
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QString expandMacros(const QString& line, int depth);
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void expandMacro(const QString& line, QString& newLine, QString& word, int& i, int depth);
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QString removeGCCAttributes(const QString& line);
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void removeGCCAttribute(const QString&line, QString& newLine, int &i, const QString& word);
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PDefine getDefine(const QString& name) const{
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return mDefines.value(name,PDefine());
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}
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// current file stuff
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PParsedFile getInclude(int index) const {
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return mIncludes[index];
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}
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void openInclude(const QString& fileName);
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void closeInclude();
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// branch stuff
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bool getCurrentBranch(){
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if (!mBranchResults.isEmpty())
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return mBranchResults.last();
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else
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return true;
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}
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void setCurrentBranch(bool value){
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mBranchResults.append(value);
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}
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void removeCurrentBranch(){
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if (mBranchResults.size()>0)
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mBranchResults.pop_back();
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};
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// include stuff
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PFileIncludes getFileIncludesEntry(const QString& fileName){
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return mIncludesList.value(fileName,PFileIncludes());
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}
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void addDefinesInFile(const QString& fileName);
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void addDefineByParts(const QString& name, const QString& args,
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const QString& value, bool hardCoded);
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void addDefineByLine(const QString& line, bool hardCoded);
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PDefine getHardDefine(const QString& name){
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return mHardDefines.value(name,PDefine());
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};
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void invalidDefinesInFile(const QString& fileName);
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void parseArgs(PDefine define);
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QStringList removeComments(const QStringList& text);
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/*
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* '_','a'..'z','A'..'Z','0'..'9'
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*/
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static bool isWordChar(const QChar& ch);
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/*
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* 'A'..'Z', '0'..'9', 'a'..'z', '_', '*', '&', '~'
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*/
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static bool isIdentChar(const QChar& ch);
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/*
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* '\r','\n'
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*/
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static bool isLineChar(const QChar& ch);
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/*
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* '\t' ' '
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*/
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static bool isSpaceChar(const QChar& ch);
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/*
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* '+', '-', '*', '/', '!', '=', '<', '>', '&', '|', '^'
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*/
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static bool isOperatorChar(const QChar& ch);
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/*
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* 'A'..'Z', 'a'..'z', '_'
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*/
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static bool isMacroIdentChar(const QChar& ch);
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/*
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* '0'..'9'
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*/
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static bool isDigit(const QChar& ch);
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/*
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* '0'..'9','x',X','a'..'f','A'..'F','u','U','l','L'
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*/
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static bool isNumberChar(const QChar& ch);
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QString lineBreak();
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bool evaluateIf(const QString& line);
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QString expandDefines(QString line);
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bool skipBraces(const QString&line, int& index, int step = 1);
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QString expandFunction(PDefine define,QString args);
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bool skipSpaces(const QString &expr, int& pos);
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bool evalNumber(const QString &expr, int& result, int& pos);
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bool evalTerm(const QString &expr, int& result, int& pos);
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bool evalUnaryExpr(const QString &expr, int& result, int& pos);
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bool evalMulExpr(const QString &expr, int& result, int& pos);
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bool evalAddExpr(const QString &expr, int& result, int& pos);
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bool evalShiftExpr(const QString &expr, int& result, int& pos);
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bool evalRelationExpr(const QString &expr, int& result, int& pos);
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bool evalEqualExpr(const QString &expr, int& result, int& pos);
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bool evalBitAndExpr(const QString &expr, int& result, int& pos);
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bool evalBitXorExpr(const QString &expr, int& result, int& pos);
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bool evalBitOrExpr(const QString &expr, int& result, int& pos);
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bool evalLogicAndExpr(const QString &expr, int& result, int& pos);
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bool evalLogicOrExpr(const QString &expr, int& result, int& pos);
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bool evalExpr(const QString &expr, int& result, int& pos);
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int evaluateExpression(QString line);
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private:
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//temporary data when preprocessing single file
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int mIndex; // points to current file buffer.
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QString mFileName;
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QStringList mBuffer;
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QStringList mResult;
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PFileIncludes mCurrentIncludes;
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int mPreProcIndex;
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QList<PParsedFile> mIncludes; // stack of files we've stepped into. last one is current file, first one is source file
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QList<bool> mBranchResults;// stack of branch results (boolean). last one is current branch, first one is outermost branch
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DefineMap mDefines; // working set, editable
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QSet<QString> mProcessed; // dictionary to save filename already processed
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//Result across processings.
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//used by parser even preprocess finished
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QHash<QString,PFileIncludes> mIncludesList;
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QHash<QString, PDefineMap> mFileDefines; //dictionary to save defines for each headerfile;
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QSet<QString> mScannedFiles;
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//option data for the parser
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//{ List of current project's include path }
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DefineMap mHardDefines; // set by "cpp -dM -E -xc NUL"
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QSet<QString> mProjectIncludePaths;
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//we also need include paths in order (for #include_next)
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QList<QString> mIncludePathList;
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QList<QString> mProjectIncludePathList;
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//{ List of current compiler set's include path}
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QSet<QString> mIncludePaths;
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bool mParseSystem;
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bool mParseLocal;
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GetFileStreamCallBack mOnGetFileStream;
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};
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using PCppPreprocessor = std::shared_ptr<CppPreprocessor>;
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#endif // CPPPREPROCESSOR_H
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