1/*
2 * Copyright (C) 2009 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#ifndef RegexJIT_h
27#define RegexJIT_h
28
29#include <wtf/Platform.h>
30
31#if ENABLE(YARR_JIT)
32
33#include "MacroAssembler.h"
34#include "RegexPattern.h"
35#include <UString.h>
36
37#include <pcre.h>
38struct JSRegExp; // temporary, remove when fallback is removed.
39
40#if CPU(X86) && !COMPILER(MSVC)
41#define YARR_CALL __attribute__ ((regparm (3)))
42#else
43#define YARR_CALL
44#endif
45
46namespace JSC {
47
48class JSGlobalData;
49class ExecutablePool;
50
51namespace Yarr {
52
53class RegexCodeBlock {
54 typedef int (*RegexJITCode)(const UChar* input, unsigned start, unsigned length, int* output) YARR_CALL;
55
56public:
57 RegexCodeBlock()
58 : m_fallback(0)
59 {
60 }
61
62 ~RegexCodeBlock()
63 {
64 if (m_fallback)
65 jsRegExpFree(m_fallback);
66 }
67
68 JSRegExp* getFallback() { return m_fallback; }
69 void setFallback(JSRegExp* fallback) { m_fallback = fallback; }
70
71 bool operator!() { return !m_ref.m_code.executableAddress(); }
72 void set(MacroAssembler::CodeRef ref) { m_ref = ref; }
73
74 int execute(const UChar* input, unsigned start, unsigned length, int* output)
75 {
76 return ((RegexJITCode)(m_ref.m_code.executableAddress()))(input, start, length, output);
77 }
78
79private:
80 MacroAssembler::CodeRef m_ref;
81 JSRegExp* m_fallback;
82};
83
84void jitCompileRegex(JSGlobalData* globalData, RegexCodeBlock& jitObject, const UString& pattern, unsigned& numSubpatterns, const char*& error, bool ignoreCase = false, bool multiline = false);
85
86inline int executeRegex(RegexCodeBlock& jitObject, const UChar* input, unsigned start, unsigned length, int* output, int outputArraySize)
87{
88 if (JSRegExp* fallback = jitObject.getFallback())
89 return (jsRegExpExecute(fallback, subject: input, subjectLength: length, startOffset: start, offsetsVector: output, offsetsVectorLength: outputArraySize) < 0) ? -1 : output[0];
90
91 return jitObject.execute(input, start, length, output);
92}
93
94} } // namespace JSC::Yarr
95
96#endif
97
98#endif // RegexJIT_h
99

source code of qtscript/src/3rdparty/javascriptcore/JavaScriptCore/yarr/RegexJIT.h