1//===-- WindowsManifestMerger.h ---------------------------------*- C++-*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===---------------------------------------------------------------------===//
8//
9// This file provides a utility for merging Microsoft .manifest files. These
10// files are xml documents which contain meta-information about applications,
11// such as whether or not admin access is required, system compatibility,
12// versions, etc. Part of the linking process of an executable may require
13// merging several of these .manifest files using a tree-merge following
14// specific rules. Unfortunately, these rules are not documented well
15// anywhere. However, a careful investigation of the behavior of the original
16// Microsoft Manifest Tool (mt.exe) revealed the rules of this merge. As the
17// saying goes, code is the best documentation, so please look below if you are
18// interested in the exact merging requirements.
19//
20// Ref:
21// https://msdn.microsoft.com/en-us/library/windows/desktop/aa374191(v=vs.85).aspx
22//
23//===---------------------------------------------------------------------===//
24
25#ifndef LLVM_WINDOWSMANIFEST_WINDOWSMANIFESTMERGER_H
26#define LLVM_WINDOWSMANIFEST_WINDOWSMANIFESTMERGER_H
27
28#include "llvm/Support/Error.h"
29
30namespace llvm {
31
32class MemoryBuffer;
33class MemoryBufferRef;
34
35namespace windows_manifest {
36
37bool isAvailable();
38
39class WindowsManifestError : public ErrorInfo<WindowsManifestError, ECError> {
40public:
41 static char ID;
42 WindowsManifestError(const Twine &Msg);
43 void log(raw_ostream &OS) const override;
44
45private:
46 std::string Msg;
47};
48
49class WindowsManifestMerger {
50public:
51 WindowsManifestMerger();
52 ~WindowsManifestMerger();
53 Error merge(MemoryBufferRef Manifest);
54
55 // Returns vector containing merged xml manifest, or uninitialized vector for
56 // empty manifest.
57 std::unique_ptr<MemoryBuffer> getMergedManifest();
58
59private:
60 class WindowsManifestMergerImpl;
61 std::unique_ptr<WindowsManifestMergerImpl> Impl;
62};
63
64} // namespace windows_manifest
65} // namespace llvm
66#endif
67