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 
isItaniumEncoding(const std::string & MangledName)16 static 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 
demangle(const std::string & MangledName)22 std::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 =
28         microsoftDemangle(MangledName.c_str(), nullptr, nullptr, nullptr);
29 
30   if (!Demangled)
31     return MangledName;
32 
33   std::string Ret = Demangled;
34   free(Demangled);
35   return Ret;
36 }
37