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/*
SPDX-FileCopyrightText: 2006 David Nolden <david.nolden.kdevelop@art-master.de>
SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef LEXERCACHE_H
#define LEXERCACHE_H
#include <hashedstring.h>
#include "macro.h"
#include <qdatetime.h>
#include <qfileinfo.h>
#include "cachemanager.h"
//#define LEXERCACHE_DEBUG
class LexerCache;
class CachedLexedFile : public QSharedData, public CacheNode
{
public:
///@todo add and manage the set of included files
CachedLexedFile(const HashedString& fileName, LexerCache* manager);
inline void addString(const HashedString& string)
{
if (!m_definedMacroNames[ string ]) {
m_strings.insert(string);
}
}
void addDefinedMacro(const Macro& macro);
void addUsedMacro(const Macro& macro);
void addIncludeFile(const HashedString& file, const QDateTime& modificationTime);
inline bool hasString(const HashedString& string) const
{
return m_strings[string];
}
QDateTime modificationTime() const;
void addProblem(const Problem& p);
QList<Problem> problems() const;
//The parameter should be a CachedLexedFile that was lexed AFTER the content of this file
void merge(const CachedLexedFile& file);
bool operator < (const CachedLexedFile& rhs) const
{
return m_fileName < rhs.m_fileName;
}
size_t hash() const;
HashedString fileName() const
{
return m_fileName;
}
const HashedStringSet& includeFiles() const
{
return m_includeFiles;
}
const MacroSet& definedMacros() const
{
return m_definedMacros;
}
const MacroSet& usedMacros() const
{
return m_usedMacros;
}
///Should contain a modification-time for each include-file
const QMap<HashedString, QDateTime>& allModificationTimes() const
{
return m_allModificationTimes;
}
private:
friend class LexerCache;
HashedString m_fileName;
QDateTime m_modificationTime;
HashedStringSet m_strings; //Set of all strings that can be affected by macros from outside
HashedStringSet m_includeFiles; //Set of all files
MacroSet m_usedMacros; //Set of all macros that were used, and were defined outside of this file
MacroSet m_definedMacros; //Set of all macros that were defined while lexing this file
HashedStringSet m_definedMacroNames;
QList<Problem> m_problems;
QMap<HashedString, QDateTime> m_allModificationTimes;
/*
Needed data:
1. Set of all strings that appear in this file(For memory-reasons they should be taken from a global string-repository, because many will be the same)
2. Set of all macros that were defined outside of, but affected the file
Algorithm:
Iterate over all available macros, and check whether they affect the file. If it does, make sure that the macro is in the macro-set and has the same body.
If the check fails: We need to reparse.
*/
};
typedef QExplicitlySharedDataPointer<CachedLexedFile> CachedLexedFilePointer;
struct CachedLexedFilePointerCompare {
bool operator() (const CachedLexedFilePointer& lhs, const CachedLexedFilePointer& rhs) const
{
return (*lhs) < (*rhs);
}
};
class Driver;
class LexerCache : public CacheManager
{
public:
explicit LexerCache(Driver* d);
virtual ~LexerCache() {}
void addLexedFile(const CachedLexedFilePointer& file);
///Returns zero if no fitting file is available for the current context
CachedLexedFilePointer lexedFile(const HashedString& fileName);
void clear();
const HashedString& unifyString(const HashedString& str)
{
QSet<HashedString>::const_iterator it = m_totalStringSet.find(str);
if (it != m_totalStringSet.end()) {
return *it;
} else {
m_totalStringSet.insert(str);
return str;
}
}
virtual void saveMemory();
private:
///before this can be called, initFileModificationCache should be called once
QDateTime fileModificationTimeCached(const HashedString& fileName);
void initFileModificationCache();
virtual void erase(const CacheNode* node);
bool sourceChanged(const CachedLexedFile& file);///Returns true if the file itself, or any of its dependencies was modified.
//typedef __gnu_cxx::hash_multimap<HashedString, CachedLexedFilePointer> CachedLexedFileMap;
typedef std::multimap<HashedString, CachedLexedFilePointer> CachedLexedFileMap;
CachedLexedFileMap m_files;
QSet<HashedString> m_totalStringSet; ///This is used to reduce memory-usage: Most strings appear again and again. Because QString is reference-counted, this set contains a unique copy of each string to use for each appearance of the string
struct FileModificationCache {
QDateTime m_readTime;
QDateTime m_modificationTime;
};
typedef QHash<HashedString, FileModificationCache> FileModificationMap;
FileModificationMap m_fileModificationCache;
Driver* m_driver;
QDateTime m_currentDateTime;
};
#endif
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