1//===- MachOUniversal.h - Mach-O universal binaries -------------*- 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 declares Mach-O fat/universal binaries.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_OBJECT_MACHOUNIVERSAL_H
15#define LLVM_OBJECT_MACHOUNIVERSAL_H
16
17#include "llvm/ADT/StringRef.h"
18#include "llvm/ADT/Triple.h"
19#include "llvm/Object/Binary.h"
20#include "llvm/Object/Archive.h"
21#include "llvm/Object/MachO.h"
22#include "llvm/Support/ErrorOr.h"
23#include "llvm/Support/MachO.h"
24
25namespace llvm {
26namespace object {
27
28class ObjectFile;
29
30class MachOUniversalBinary : public Binary {
31  virtual void anchor();
32
33  uint32_t NumberOfObjects;
34public:
35  class ObjectForArch {
36    const MachOUniversalBinary *Parent;
37    /// \brief Index of object in the universal binary.
38    uint32_t Index;
39    /// \brief Descriptor of the object.
40    MachO::fat_arch Header;
41
42  public:
43    ObjectForArch(const MachOUniversalBinary *Parent, uint32_t Index);
44
45    void clear() {
46      Parent = nullptr;
47      Index = 0;
48    }
49
50    bool operator==(const ObjectForArch &Other) const {
51      return (Parent == Other.Parent) && (Index == Other.Index);
52    }
53
54    ObjectForArch getNext() const { return ObjectForArch(Parent, Index + 1); }
55    uint32_t getCPUType() const { return Header.cputype; }
56    std::string getArchTypeName() const {
57      Triple T = MachOObjectFile::getArch(Header.cputype, Header.cpusubtype);
58      return T.getArchName();
59    }
60
61    ErrorOr<std::unique_ptr<ObjectFile>> getAsObjectFile() const;
62
63    std::error_code getAsArchive(std::unique_ptr<Archive> &Result) const;
64  };
65
66  class object_iterator {
67    ObjectForArch Obj;
68  public:
69    object_iterator(const ObjectForArch &Obj) : Obj(Obj) {}
70    const ObjectForArch* operator->() const {
71      return &Obj;
72    }
73
74    bool operator==(const object_iterator &Other) const {
75      return Obj == Other.Obj;
76    }
77    bool operator!=(const object_iterator &Other) const {
78      return !(*this == Other);
79    }
80
81    object_iterator& operator++() {  // Preincrement
82      Obj = Obj.getNext();
83      return *this;
84    }
85  };
86
87  MachOUniversalBinary(std::unique_ptr<MemoryBuffer> Source,
88                       std::error_code &ec);
89  static ErrorOr<MachOUniversalBinary *>
90  create(std::unique_ptr<MemoryBuffer> Source);
91
92  object_iterator begin_objects() const {
93    return ObjectForArch(this, 0);
94  }
95  object_iterator end_objects() const {
96    return ObjectForArch(nullptr, 0);
97  }
98
99  uint32_t getNumberOfObjects() const { return NumberOfObjects; }
100
101  // Cast methods.
102  static inline bool classof(Binary const *V) {
103    return V->isMachOUniversalBinary();
104  }
105
106  ErrorOr<std::unique_ptr<ObjectFile>>
107  getObjectForArch(Triple::ArchType Arch) const;
108};
109
110}
111}
112
113#endif
114