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 * Copyright (C) 2009 Apple Inc. All rights reserved.
 * Copyright (C) 2010 Peter Varga (pvarga@inf.u-szeged.hu), University of Szeged
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#ifndef Yarr_h
#define Yarr_h

#include <limits.h>

#include "YarrInterpreter.h"
#include "YarrPattern.h"

namespace JSC { namespace Yarr {

#define YarrStackSpaceForBackTrackInfoPatternCharacter 1 // Only for !fixed quantifiers.
#define YarrStackSpaceForBackTrackInfoCharacterClass 1 // Only for !fixed quantifiers.
#define YarrStackSpaceForBackTrackInfoBackReference 2
#define YarrStackSpaceForBackTrackInfoAlternative 1 // One per alternative.
#define YarrStackSpaceForBackTrackInfoParentheticalAssertion 1
#define YarrStackSpaceForBackTrackInfoParenthesesOnce 1 // Only for !fixed quantifiers.
#define YarrStackSpaceForBackTrackInfoParenthesesTerminal 1
#define YarrStackSpaceForBackTrackInfoParentheses 2

static const unsigned quantifyInfinite = UINT_MAX;

// The below limit restricts the number of "recursive" match calls in order to
// avoid spending exponential time on complex regular expressions.
static const unsigned matchLimit = 1000000;

enum JSRegExpResult {
    JSRegExpMatch = 1,
    JSRegExpNoMatch = 0,
    JSRegExpErrorNoMatch = -1,
    JSRegExpErrorHitLimit = -2,
    JSRegExpErrorNoMemory = -3,
    JSRegExpErrorInternal = -4
};

PassOwnPtr<BytecodePattern> byteCompile(YarrPattern&, BumpPointerAllocator*);
int interpret(BytecodePattern*, const UChar* input, unsigned start, unsigned length, int* output);

} } // namespace JSC::Yarr

#endif // Yarr_h

