yarr/Yarr.h

   1 /*
   2  * Copyright (C) 2009 Apple Inc. All rights reserved.
   3  * Copyright (C) 2010 Peter Varga (pvarga@inf.u-szeged.hu), University of Szeged
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY UNIVERSITY OF SZEGED ``AS IS'' AND ANY
  16  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  18  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL UNIVERSITY OF SZEGED OR
  19  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  20  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  22  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  23  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  25  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #ifndef Yarr_h
  29 #define Yarr_h
  30
  31 #include "YarrInterpreter.h"
  32 #include "YarrPattern.h"
  33
  34 namespace JSC { namespace Yarr {
  35
  36 #define YarrStackSpaceForBackTrackInfoPatternCharacter 1 // Only for !fixed quantifiers.
  37 #define YarrStackSpaceForBackTrackInfoCharacterClass 1 // Only for !fixed quantifiers.
  38 #define YarrStackSpaceForBackTrackInfoBackReference 2
  39 #define YarrStackSpaceForBackTrackInfoAlternative 1 // One per alternative.
  40 #define YarrStackSpaceForBackTrackInfoParentheticalAssertion 1
  41 #define YarrStackSpaceForBackTrackInfoParenthesesOnce 1 // Only for !fixed quantifiers.
  42 #define YarrStackSpaceForBackTrackInfoParenthesesTerminal 1
  43 #define YarrStackSpaceForBackTrackInfoParentheses 2
  44
  45 static const unsigned quantifyInfinite = UINT_MAX;
  46
  47 // The below limit restricts the number of "recursive" match calls in order to
  48 // avoid spending exponential time on complex regular expressions.
  49 static const unsigned matchLimit = 1000000;
  50
  51 enum JSRegExpResult {
  52     JSRegExpMatch = 1,
  53     JSRegExpNoMatch = 0,
  54     JSRegExpErrorNoMatch = -1,
  55     JSRegExpErrorHitLimit = -2,
  56     JSRegExpErrorNoMemory = -3,
  57     JSRegExpErrorInternal = -4
  58 };
  59
  60 PassOwnPtr<BytecodePattern> byteCompile(YarrPattern&, BumpPointerAllocator*);
  61 int interpret(BytecodePattern*, const UChar* input, unsigned start, unsigned length, int* output);
  62
  63 } } // namespace JSC::Yarr
  64
  65 #endif // Yarr_h
  66