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; FileEntryFileEntry33 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(DenseMapInfo<uint32_t>::getHashValue(Val.Dir), 58 DenseMapInfo<uint32_t>::getHashValue(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