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#ifndef QV4REGEXP_H
#define QV4REGEXP_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QString>
#include <QVector>

#include <wtf/RefPtr.h>
#include <wtf/FastAllocBase.h>
#include <wtf/BumpPointerAllocator.h>

#include <limits.h>

#include <yarr/Yarr.h>
#include <yarr/YarrInterpreter.h>
#include <yarr/YarrJIT.h>

#include "qv4managed_p.h"
#include "qv4engine_p.h"

QT_BEGIN_NAMESPACE

namespace QV4 {

struct ExecutionEngine;
struct RegExpCacheKey;

namespace Heap {

struct RegExp : Base {
    void init(ExecutionEngine *engine, const QString& pattern, bool ignoreCase, bool multiline, bool global);
    void destroy();

    QString *pattern;
    JSC::Yarr::BytecodePattern *byteCode;
#if ENABLE(YARR_JIT)
    JSC::Yarr::YarrCodeBlock *jitCode;
#endif
    bool hasValidJITCode() const {
#if ENABLE(YARR_JIT)
        return jitCode && !jitCode->isFallBack() && jitCode->has16BitCode();
#else
        return false;
#endif
    }
    RegExpCache *cache;
    int subPatternCount;
    bool ignoreCase;
    bool multiLine;
    bool global;
    bool valid;

    int captureCount() const { return subPatternCount + 1; }
};
Q_STATIC_ASSERT(std::is_trivial< RegExp >::value);

}

struct RegExp : public Managed
{
    V4_MANAGED(RegExp, Managed)
    Q_MANAGED_TYPE(RegExp)
    V4_NEEDS_DESTROY
    V4_INTERNALCLASS(RegExp)

    QString pattern() const { return *d()->pattern; }
    JSC::Yarr::BytecodePattern *byteCode() { return d()->byteCode; }
#if ENABLE(YARR_JIT)
    JSC::Yarr::YarrCodeBlock *jitCode() const { return d()->jitCode; }
#endif
    RegExpCache *cache() const { return d()->cache; }
    int subPatternCount() const { return d()->subPatternCount; }
    bool ignoreCase() const { return d()->ignoreCase; }
    bool multiLine() const { return d()->multiLine; }
    bool global() const { return d()->global; }

    static Heap::RegExp *create(ExecutionEngine* engine, const QString& pattern, bool ignoreCase = false, bool multiline = false, bool global = false);

    bool isValid() const { return d()->valid; }

    uint match(const QString& string, int start, uint *matchOffsets);

    int captureCount() const { return subPatternCount() + 1; }

    friend class RegExpCache;
};

struct RegExpCacheKey
{
    RegExpCacheKey(const QString &pattern, bool ignoreCase, bool multiLine, bool global)
        : pattern(pattern)
        , ignoreCase(ignoreCase)
        , multiLine(multiLine)
        , global(global)
    { }
    explicit inline RegExpCacheKey(const RegExp::Data *re);

    bool operator==(const RegExpCacheKey &other) const
    { return pattern == other.pattern && ignoreCase == other.ignoreCase && multiLine == other.multiLine && global == other.global; }
    bool operator!=(const RegExpCacheKey &other) const
    { return !operator==(other); }

    QString pattern;
    uint ignoreCase : 1;
    uint multiLine : 1;
    uint global : 1;
};

inline RegExpCacheKey::RegExpCacheKey(const RegExp::Data *re)
    : pattern(*re->pattern)
    , ignoreCase(re->ignoreCase)
    , multiLine(re->multiLine)
    , global(re->global)
{}

inline uint qHash(const RegExpCacheKey& key, uint seed = 0) Q_DECL_NOTHROW
{ return qHash(key.pattern, seed); }

class RegExpCache : public QHash<RegExpCacheKey, WeakValue>
{
public:
    ~RegExpCache();
};



}

QT_END_NAMESPACE

#endif // QV4REGEXP_H