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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, 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, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#ifndef QMAKEPARSER_H
#define QMAKEPARSER_H
#include "qmake_global.h"
#include "proitems.h"
#include <qhash.h>
#include <qstack.h>
#ifdef PROPARSER_THREAD_SAFE
# include <qmutex.h>
# include <qwaitcondition.h>
#endif
QT_BEGIN_NAMESPACE
class QMAKE_EXPORT QMakeParserHandler
{
public:
enum {
CategoryMask = 0xf00,
WarningMessage = 0x000,
ErrorMessage = 0x100,
SourceMask = 0xf0,
SourceParser = 0,
CodeMask = 0xf,
WarnLanguage = 0,
WarnDeprecated,
ParserWarnLanguage = SourceParser | WarningMessage | WarnLanguage,
ParserWarnDeprecated = SourceParser | WarningMessage | WarnDeprecated,
ParserIoError = ErrorMessage | SourceParser,
ParserError
};
virtual void message(int type, const QString &msg,
const QString &fileName = QString(), int lineNo = 0) = 0;
};
class ProFileCache;
class QMakeVfs;
class QMAKE_EXPORT QMakeParser
{
public:
// Call this from a concurrency-free context
static void initialize();
enum ParseFlag {
ParseDefault = 0,
ParseUseCache = 1,
ParseReportMissing = 2
};
Q_DECLARE_FLAGS(ParseFlags, ParseFlag)
QMakeParser(ProFileCache *cache, QMakeVfs *vfs, QMakeParserHandler *handler);
enum SubGrammar { FullGrammar, TestGrammar, ValueGrammar };
// fileName is expected to be absolute and cleanPath()ed.
ProFile *parsedProFile(const QString &fileName, ParseFlags flags = ParseDefault);
ProFile *parsedProBlock(const QString &contents, const QString &name, int line = 0,
SubGrammar grammar = FullGrammar);
void discardFileFromCache(const QString &fileName);
private:
enum ScopeNesting {
NestNone = 0,
NestLoop = 1,
NestFunction = 2
};
struct BlockScope {
BlockScope() : start(0), braceLevel(0), special(false), inBranch(false), nest(NestNone) {}
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
uchar nest; // Into what control structures we are nested
};
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, CtxPureValue, 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, ParseFlags flags);
bool read(ProFile *pro, const QString &content, int line, SubGrammar grammar);
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);
ALWAYS_INLINE bool resolveVariable(ushort *xprPtr, int tlen, int needSep, ushort **ptr,
ushort **buf, QString *xprBuff,
ushort **tokPtr, QString *tokBuff,
const ushort *cur, const QString &in);
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 message(int type, const QString &msg) const;
void parseError(const QString &msg) const
{ message(QMakeParserHandler::ParserError, msg); }
void languageWarning(const QString &msg) const
{ message(QMakeParserHandler::ParserWarnLanguage, msg); }
void deprecationWarning(const QString &msg) const
{ message(QMakeParserHandler::ParserWarnDeprecated, msg); }
// 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;
QMakeParserHandler *m_handler;
QMakeVfs *m_vfs;
// This doesn't help gcc 3.3 ...
template<typename T> friend class QTypeInfo;
friend class ProFileCache;
};
Q_DECLARE_OPERATORS_FOR_FLAGS(QMakeParser::ParseFlags)
class QMAKE_EXPORT 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 QMakeParser;
};
#if !defined(__GNUC__) || __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 3)
Q_DECLARE_TYPEINFO(QMakeParser::BlockScope, Q_MOVABLE_TYPE);
Q_DECLARE_TYPEINFO(QMakeParser::Context, Q_PRIMITIVE_TYPE);
#endif
QT_END_NAMESPACE
#endif // PROFILEPARSER_H
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