1//===-- Demangle.cpp - Common demangling functions ------------------------===//
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/// \file This file contains definitions of common demangling functions.
10///
11//===----------------------------------------------------------------------===//
12
13#include "llvm/Demangle/Demangle.h"
14#include <cstdlib>
15
16static bool isItaniumEncoding(const std::string &MangledName) {
17  size_t Pos = MangledName.find_first_not_of('_');
18  // A valid Itanium encoding requires 1-4 leading underscores, followed by 'Z'.
19  return Pos > 0 && Pos <= 4 && MangledName[Pos] == 'Z';
20}
21
22std::string llvm::demangle(const std::string &MangledName) {
23  char *Demangled;
24  if (isItaniumEncoding(MangledName))
25    Demangled = itaniumDemangle(MangledName.c_str(), nullptr, nullptr, nullptr);
26  else
27    Demangled = microsoftDemangle(MangledName.c_str(), nullptr, nullptr,
28                                  nullptr, nullptr);
29
30  if (!Demangled)
31    return MangledName;
32
33  std::string Ret = Demangled;
34  free(Demangled);
35  return Ret;
36}
37