1/*
2 * Copyright (C) 2008 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 "WREC.h"
28
29#if ENABLE(WREC)
30
31#include "CharacterClassConstructor.h"
32#include "Interpreter.h"
33#include "JSGlobalObject.h"
34#include "RegisterFile.h"
35#include "WRECFunctors.h"
36#include "WRECParser.h"
37#include "pcre_internal.h"
38
39using namespace WTF;
40
41namespace JSC { namespace WREC {
42
43CompiledRegExp Generator::compileRegExp(JSGlobalData* globalData, const UString& pattern, unsigned* numSubpatterns_ptr, const char** error_ptr, RefPtr<ExecutablePool>& pool, bool ignoreCase, bool multiline)
44{
45    if (pattern.size() > MAX_PATTERN_SIZE) {
46        *error_ptr = "regular expression too large";
47        return 0;
48    }
49
50    Parser parser(pattern, ignoreCase, multiline);
51    Generator& generator = parser.generator();
52    MacroAssembler::JumpList failures;
53    MacroAssembler::Jump endOfInput;
54
55    generator.generateEnter();
56    generator.generateSaveIndex();
57
58    Label beginPattern(&generator);
59    parser.parsePattern(failures);
60    generator.generateReturnSuccess();
61
62    failures.link(&generator);
63    generator.generateIncrementIndex(&endOfInput);
64    parser.parsePattern(failures);
65    generator.generateReturnSuccess();
66
67    failures.link(&generator);
68    generator.generateIncrementIndex();
69    generator.generateJumpIfNotEndOfInput(beginPattern);
70
71    endOfInput.link(&generator);
72    generator.generateReturnFailure();
73
74    if (parser.error()) {
75        *error_ptr = parser.syntaxError(); // NULL in the case of patterns that WREC doesn't support yet.
76        return 0;
77    }
78
79    *numSubpatterns_ptr = parser.numSubpatterns();
80    pool = globalData->executableAllocator.poolForSize(generator.size());
81    return reinterpret_cast<CompiledRegExp>(generator.copyCode(pool.get()));
82}
83
84} } // namespace JSC::WREC
85
86#endif // ENABLE(WREC)
87