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1 : //===-- WindowsManifestMerger.h ---------------------------------*- C++-*-===//
2 : //
3 : // The LLVM Compiler Infrastructure
4 : //
5 : // This file is distributed under the University of Illinois Open Source
6 : // License. See LICENSE.TXT for details.
7 : //
8 : //===---------------------------------------------------------------------===//
9 : //
10 : // This file provides a utility for merging Microsoft .manifest files. These
11 : // files are xml documents which contain meta-information about applications,
12 : // such as whether or not admin access is required, system compatibility,
13 : // versions, etc. Part of the linking process of an executable may require
14 : // merging several of these .manifest files using a tree-merge following
15 : // specific rules. Unfortunately, these rules are not documented well
16 : // anywhere. However, a careful investigation of the behavior of the original
17 : // Microsoft Manifest Tool (mt.exe) revealed the rules of this merge. As the
18 : // saying goes, code is the best documentation, so please look below if you are
19 : // interested in the exact merging requirements.
20 : //
21 : // Ref:
22 : // https://msdn.microsoft.com/en-us/library/windows/desktop/aa374191(v=vs.85).aspx
23 : //
24 : //===---------------------------------------------------------------------===//
25 :
26 : #ifndef LLVM_INCLUDE_LLVM_SUPPORT_WINDOWS_MANIFEST_MERGER_H
27 : #define LLVM_INCLUDE_LLVM_SUPPORT_WINDOWS_MANIFEST_MERGER_H
28 :
29 : #include "llvm/Support/Error.h"
30 :
31 : namespace llvm {
32 :
33 : class MemoryBuffer;
34 :
35 : namespace windows_manifest {
36 :
37 : bool isAvailable();
38 :
39 0 : class WindowsManifestError : public ErrorInfo<WindowsManifestError, ECError> {
40 : public:
41 : static char ID;
42 : WindowsManifestError(const Twine &Msg);
43 : void log(raw_ostream &OS) const override;
44 :
45 : private:
46 : std::string Msg;
47 : };
48 :
49 : class WindowsManifestMerger {
50 : public:
51 : WindowsManifestMerger();
52 : ~WindowsManifestMerger();
53 : Error merge(const MemoryBuffer &Manifest);
54 :
55 : // Returns vector containing merged xml manifest, or uninitialized vector for
56 : // empty manifest.
57 : std::unique_ptr<MemoryBuffer> getMergedManifest();
58 :
59 : private:
60 : class WindowsManifestMergerImpl;
61 : std::unique_ptr<WindowsManifestMergerImpl> Impl;
62 : };
63 :
64 : } // namespace windows_manifest
65 : } // namespace llvm
66 : #endif
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