1/*
2 * Copyright (C) 2011, 2016 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "YarrSyntaxChecker.h"
28
29#include "YarrFlags.h"
30#include "YarrParser.h"
31#include <wtf/Optional.h>
32
33namespace JSC { namespace Yarr {
34
35class SyntaxChecker {
36public:
37 void assertionBOL() {}
38 void assertionEOL() {}
39 void assertionWordBoundary(bool) {}
40 void atomPatternCharacter(UChar32) {}
41 void atomBuiltInCharacterClass(BuiltInCharacterClassID, bool) {}
42 void atomCharacterClassBegin(bool = false) {}
43 void atomCharacterClassAtom(UChar) {}
44 void atomCharacterClassRange(UChar, UChar) {}
45 void atomCharacterClassBuiltIn(BuiltInCharacterClassID, bool) {}
46 void atomCharacterClassEnd() {}
47 void atomParenthesesSubpatternBegin(bool = true, Optional<String> = WTF::nullopt) {}
48 void atomParentheticalAssertionBegin(bool = false) {}
49 void atomParenthesesEnd() {}
50 void atomBackReference(unsigned) {}
51 void atomNamedBackReference(const String&) {}
52 bool isValidNamedForwardReference(const String&) { return true; }
53 void atomNamedForwardReference(const String&) {}
54 void quantifyAtom(unsigned, unsigned, bool) {}
55 void disjunction() {}
56};
57
58ErrorCode checkSyntax(const String& pattern, const String& flags)
59{
60 SyntaxChecker syntaxChecker;
61
62 auto parsedFlags = parseFlags(flags);
63 if (!parsedFlags)
64 return ErrorCode::InvalidRegularExpressionFlags;
65
66 return parse(syntaxChecker, pattern, parsedFlags->contains(Flags::Unicode));
67}
68
69}} // JSC::Yarr
70