1 | //===- FileEntry.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 | #ifndef LLVM_DEBUGINFO_GSYM_FILEENTRY_H |
10 | #define LLVM_DEBUGINFO_GSYM_FILEENTRY_H |
11 | |
12 | #include "llvm/ADT/DenseMapInfo.h" |
13 | #include "llvm/ADT/Hashing.h" |
14 | #include <functional> |
15 | #include <stdint.h> |
16 | |
17 | namespace llvm { |
18 | namespace gsym { |
19 | |
20 | /// Files in GSYM are contained in FileEntry structs where we split the |
21 | /// directory and basename into two different strings in the string |
22 | /// table. This allows paths to shared commont directory and filename |
23 | /// strings and saves space. |
24 | struct FileEntry { |
25 | |
26 | /// Offsets in the string table. |
27 | /// @{ |
28 | uint32_t Dir = 0; |
29 | uint32_t Base = 0; |
30 | /// @} |
31 | |
32 | FileEntry() = default; |
33 | FileEntry(uint32_t D, uint32_t B) : Dir(D), Base(B) {} |
34 | |
35 | // Implement operator== so that FileEntry can be used as key in |
36 | // unordered containers. |
37 | bool operator==(const FileEntry &RHS) const { |
38 | return Base == RHS.Base && Dir == RHS.Dir; |
39 | }; |
40 | bool operator!=(const FileEntry &RHS) const { |
41 | return Base != RHS.Base || Dir != RHS.Dir; |
42 | }; |
43 | }; |
44 | |
45 | } // namespace gsym |
46 | |
47 | template <> struct DenseMapInfo<gsym::FileEntry> { |
48 | static inline gsym::FileEntry getEmptyKey() { |
49 | uint32_t key = DenseMapInfo<uint32_t>::getEmptyKey(); |
50 | return gsym::FileEntry(key, key); |
51 | } |
52 | static inline gsym::FileEntry getTombstoneKey() { |
53 | uint32_t key = DenseMapInfo<uint32_t>::getTombstoneKey(); |
54 | return gsym::FileEntry(key, key); |
55 | } |
56 | static unsigned getHashValue(const gsym::FileEntry &Val) { |
57 | return llvm::hash_combine(args: DenseMapInfo<uint32_t>::getHashValue(Val: Val.Dir), |
58 | args: DenseMapInfo<uint32_t>::getHashValue(Val: Val.Base)); |
59 | } |
60 | static bool isEqual(const gsym::FileEntry &LHS, const gsym::FileEntry &RHS) { |
61 | return LHS == RHS; |
62 | } |
63 | }; |
64 | |
65 | } // namespace llvm |
66 | #endif // LLVM_DEBUGINFO_GSYM_FILEENTRY_H |
67 |