1/*
2 * Copyright (C) 2011 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. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef DynamicLinkerEnvironmentExtractor_h
27#define DynamicLinkerEnvironmentExtractor_h
28
29#include <mach/machine.h>
30#include <wtf/Noncopyable.h>
31#include <wtf/RetainPtr.h>
32#include <wtf/Vector.h>
33#include <wtf/text/CString.h>
34
35namespace WebKit {
36
37class EnvironmentVariables;
38
39class DynamicLinkerEnvironmentExtractor {
40    WTF_MAKE_NONCOPYABLE(DynamicLinkerEnvironmentExtractor);
41
42public:
43    DynamicLinkerEnvironmentExtractor(NSString *executablePath, cpu_type_t architecture);
44
45    void getExtractedEnvironmentVariables(EnvironmentVariables&) const;
46
47private:
48    void processSingleArchitecture(const void* data, size_t length);
49    void processFatFile(const void* data, size_t length);
50    void processLoadCommands(const void* data, size_t length, int32_t numberOfCommands, bool shouldByteSwap);
51    size_t processLoadCommand(const void* data, size_t length, bool shouldByteSwap);
52    void processEnvironmentVariable(const char* environmentString);
53
54    RetainPtr<NSString> m_executablePath;
55    cpu_type_t m_architecture;
56
57    Vector<std::pair<CString, CString>> m_extractedVariables;
58};
59
60} // namespace WebKit
61
62#endif // DynamicLinkerEnvironmentExtractor_h
63