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/***************************************************************************
copyright : (C) 2006 by David Nolden
email : [email protected]
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifndef LEXERCACHE_H
#define LEXERCACHE_H
#include <hashedstring.h>
#include <ext/hash_map>
#include <ksharedptr.h>
#include "macro.h"
#include <kdebug.h>
#include <tqdatetime.h>
#include <tqfileinfo.h>
#include <ext/hash_set>
#include "cachemanager.h"
//#define LEXERCACHE_DEBUG
class LexerCache;
class CachedLexedFile : public TDEShared, 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 TQDateTime& modificationTime );
inline bool hasString( const HashedString& string ) const {
return m_strings[string];
}
TQDateTime modificationTime() const;
void addProblem( const Problem& p );
TQValueList<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 TQMap<HashedString, TQDateTime>& allModificationTimes() const {
return m_allModificationTimes;
}
private:
friend class LexerCache;
HashedString m_fileName;
TQDateTime 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;
TQValueList<Problem> m_problems;
TQMap<HashedString, TQDateTime> 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 TDESharedPtr<CachedLexedFile> CachedLexedFilePointer;
struct CachedLexedFilePointerCompare {
bool operator() ( const CachedLexedFilePointer& lhs, const CachedLexedFilePointer& rhs ) const {
return (*lhs) < (*rhs );
}
};
class Driver;
class LexerCache : public CacheManager {
public:
LexerCache( Driver* d );
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 ) {
__gnu_cxx::hash_set<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
TQDateTime 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;
__gnu_cxx::hash_set<HashedString> m_totalStringSet; ///This is used to reduce memory-usage: Most strings appear again and again. Because TQString is reference-counted, this set contains a unique copy of each string to used for each appearance of the string
struct FileModificationCache {
TQDateTime m_readTime;
TQDateTime m_modificationTime;
};
typedef __gnu_cxx::hash_map<HashedString, FileModificationCache> FileModificationMap;
FileModificationMap m_fileModificationCache;
Driver* m_driver;
TQDateTime m_currentDateTime;
};
#endif
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