1//===- StringTable.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_STRINGTABLE_H
10#define LLVM_DEBUGINFO_GSYM_STRINGTABLE_H
11
12#include "llvm/ADT/StringRef.h"
13#include "llvm/DebugInfo/GSYM/ExtractRanges.h"
14#include "llvm/DebugInfo/GSYM/GsymTypes.h"
15#include <stdint.h>
16
17namespace llvm {
18namespace gsym {
19
20/// String tables in GSYM files are required to start with an empty
21/// string at offset zero. Strings must be UTF8 NULL terminated strings.
22struct StringTable {
23 StringRef Data;
24 StringTable() = default;
25 StringTable(StringRef D) : Data(D) {}
26 StringRef operator[](size_t Offset) const { return getString(Offset); }
27 StringRef getString(gsym_strp_t Offset) const {
28 if (Offset < Data.size()) {
29 auto End = Data.find(C: '\0', From: Offset);
30 return Data.substr(Start: Offset, N: End - Offset);
31 }
32 return StringRef();
33 }
34 void clear() { Data = StringRef(); }
35};
36
37inline void dump(raw_ostream &OS, const StringTable &S,
38 uint8_t StringOffsetSize) {
39 OS << "String table:\n";
40 gsym_strp_t Offset = 0;
41 const size_t Size = S.Data.size();
42 while (Offset < Size) {
43 StringRef Str = S.getString(Offset);
44 switch (StringOffsetSize) {
45 case 1:
46 OS << HEX8(Offset);
47 break;
48 case 2:
49 OS << HEX16(Offset);
50 break;
51 case 4:
52 OS << HEX32(Offset);
53 break;
54 case 8:
55 OS << HEX64(Offset);
56 break;
57 default:
58 OS << HEX64(Offset);
59 }
60 OS << ": \"" << Str << "\"\n";
61 Offset += Str.size() + 1;
62 }
63}
64
65} // namespace gsym
66} // namespace llvm
67#endif // LLVM_DEBUGINFO_GSYM_STRINGTABLE_H
68