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 #include <utility> 17 18 namespace llvm { 19 namespace gsym { 20 21 /// Files in GSYM are contained in FileEntry structs where we split the 22 /// directory and basename into two different strings in the string 23 /// table. This allows paths to shared commont directory and filename 24 /// strings and saves space. 25 struct FileEntry { 26 27 /// Offsets in the string table. 28 /// @{ 29 uint32_t Dir = 0; 30 uint32_t Base = 0; 31 /// @} 32 33 FileEntry() = default; 34 FileEntry(uint32_t D, uint32_t B) : Dir(D), Base(B) {} 35 36 // Implement operator== so that FileEntry can be used as key in 37 // unordered containers. 38 bool operator==(const FileEntry &RHS) const { 39 return Base == RHS.Base && Dir == RHS.Dir; 40 }; 41 bool operator!=(const FileEntry &RHS) const { 42 return Base != RHS.Base || Dir != RHS.Dir; 43 }; 44 }; 45 46 } // namespace gsym 47 48 template <> struct DenseMapInfo<gsym::FileEntry> { 49 static inline gsym::FileEntry getEmptyKey() { 50 uint32_t key = DenseMapInfo<uint32_t>::getEmptyKey(); 51 return gsym::FileEntry(key, key); 52 } 53 static inline gsym::FileEntry getTombstoneKey() { 54 uint32_t key = DenseMapInfo<uint32_t>::getTombstoneKey(); 55 return gsym::FileEntry(key, key); 56 } 57 static unsigned getHashValue(const gsym::FileEntry &Val) { 58 return llvm::hash_combine(DenseMapInfo<uint32_t>::getHashValue(Val.Dir), 59 DenseMapInfo<uint32_t>::getHashValue(Val.Base)); 60 } 61 static bool isEqual(const gsym::FileEntry &LHS, const gsym::FileEntry &RHS) { 62 return LHS == RHS; 63 } 64 }; 65 66 } // namespace llvm 67 #endif // #ifndef LLVM_DEBUGINFO_GSYM_FILEENTRY_H 68