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/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (info@qt.nokia.com)
**
**
** GNU Lesser General Public License Usage
**
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this file.
** Please review the following information to ensure the GNU Lesser General
** Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** Other Usage
**
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**************************************************************************/
#ifndef PROFILEPARSER_H
#define PROFILEPARSER_H
#include "proitems.h"
#include <QtCore/QHash>
#include <QtCore/QStack>
#ifdef PROPARSER_THREAD_SAFE
# include <QtCore/QMutex>
# include <QtCore/QWaitCondition>
#endif
// Be fast even for debug builds
#ifdef __GNUC__
# define ALWAYS_INLINE inline __attribute__((always_inline))
#elif defined(_MSC_VER)
# define ALWAYS_INLINE __forceinline
#else
# define ALWAYS_INLINE inline
#endif
QT_BEGIN_NAMESPACE
class ProFileParserHandler
{
public:
// Some error during parsing
virtual void parseError(const QString &filename, int lineNo, const QString &msg) = 0;
};
class ProFileCache;
class ProFileParser
{
public:
// Call this from a concurrency-free context
static void initialize();
ProFileParser(ProFileCache *cache, ProFileParserHandler *handler);
// fileName is expected to be absolute and cleanPath()ed.
// If contents is non-null, it will be used instead of the file's actual content
ProFile *parsedProFile(const QString &fileName, bool cache = false,
const QString *contents = 0);
ProFile *parsedProBlock(const QString &name, const QString &contents)
{ return parsedProFile(name, false, &contents); }
private:
struct BlockScope {
BlockScope() : start(0), braceLevel(0), special(false), inBranch(false) {}
BlockScope(const BlockScope &other) { *this = other; }
ushort *start; // Where this block started; store length here
int braceLevel; // Nesting of braces in scope
bool special; // Single-line conditionals inside loops, etc. cannot have else branches
bool inBranch; // The 'else' branch of the previous TokBranch is still open
};
enum ScopeState {
StNew, // Fresh scope
StCtrl, // Control statement (for or else) met on current line
StCond // Conditionals met on current line
};
enum Context { CtxTest, CtxValue, CtxArgs };
struct ParseCtx {
int parens; // Nesting of non-functional parentheses
int argc; // Number of arguments in current function call
int wordCount; // Number of words in current expression
Context context;
ushort quote; // Enclosing quote type
ushort terminator; // '}' if replace function call is braced, ':' if test function
};
bool read(ProFile *pro);
bool read(ProFile *pro, const QString &content);
ALWAYS_INLINE void putTok(ushort *&tokPtr, ushort tok);
ALWAYS_INLINE void putBlockLen(ushort *&tokPtr, uint len);
ALWAYS_INLINE void putBlock(ushort *&tokPtr, const ushort *buf, uint len);
void putHashStr(ushort *&pTokPtr, const ushort *buf, uint len);
void finalizeHashStr(ushort *buf, uint len);
void putLineMarker(ushort *&tokPtr);
void finalizeCond(ushort *&tokPtr, ushort *uc, ushort *ptr, int wordCount);
void finalizeCall(ushort *&tokPtr, ushort *uc, ushort *ptr, int argc);
void finalizeTest(ushort *&tokPtr);
void bogusTest(ushort *&tokPtr);
void enterScope(ushort *&tokPtr, bool special, ScopeState state);
void leaveScope(ushort *&tokPtr);
void flushCond(ushort *&tokPtr);
void flushScopes(ushort *&tokPtr);
void parseError(const QString &msg) const;
// Current location
ProFile *m_proFile;
int m_lineNo;
QStack<BlockScope> m_blockstack;
ScopeState m_state;
int m_markLine; // Put marker for this line
bool m_inError; // Current line had a parsing error; suppress followup error messages
bool m_canElse; // Conditionals met on previous line, but no scope was opened
bool m_invert; // Pending conditional is negated
enum { NoOperator, AndOperator, OrOperator } m_operator; // Pending conditional is ORed/ANDed
QString m_tmp; // Temporary for efficient toQString
ProFileCache *m_cache;
ProFileParserHandler *m_handler;
// This doesn't help gcc 3.3 ...
template<typename T> friend class QTypeInfo;
friend class ProFileCache;
};
class ProFileCache
{
public:
ProFileCache() {}
~ProFileCache();
void discardFile(const QString &fileName);
void discardFiles(const QString &prefix);
private:
struct Entry {
ProFile *pro;
#ifdef PROPARSER_THREAD_SAFE
struct Locker {
Locker() : waiters(0), done(false) {}
QWaitCondition cond;
int waiters;
bool done;
};
Locker *locker;
#endif
};
QHash<QString, Entry> parsed_files;
#ifdef PROPARSER_THREAD_SAFE
QMutex mutex;
#endif
friend class ProFileParser;
};
#if !defined(__GNUC__) || __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 3)
Q_DECLARE_TYPEINFO(ProFileParser::BlockScope, Q_MOVABLE_TYPE);
Q_DECLARE_TYPEINFO(ProFileParser::Context, Q_PRIMITIVE_TYPE);
#endif
QT_END_NAMESPACE
#endif // PROFILEPARSER_H
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