65 lines
1.9 KiB
C++
65 lines
1.9 KiB
C++
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//===-- Demangle.cpp - Common demangling functions ------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file This file contains definitions of common demangling functions.
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///
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//===----------------------------------------------------------------------===//
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#include "llvm/Demangle/Demangle.h"
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#include <cstdlib>
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#include <cstring>
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static bool isItaniumEncoding(const char *S) {
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// Itanium encoding requires 1 or 3 leading underscores, followed by 'Z'.
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return std::strncmp(S, "_Z", 2) == 0 || std::strncmp(S, "___Z", 4) == 0;
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}
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static bool isRustEncoding(const char *S) { return S[0] == '_' && S[1] == 'R'; }
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static bool isDLangEncoding(const std::string &MangledName) {
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return MangledName.size() >= 2 && MangledName[0] == '_' &&
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MangledName[1] == 'D';
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}
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std::string llvm::demangle(const std::string &MangledName) {
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std::string Result;
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const char *S = MangledName.c_str();
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if (nonMicrosoftDemangle(S, Result))
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return Result;
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if (S[0] == '_' && nonMicrosoftDemangle(S + 1, Result))
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return Result;
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if (char *Demangled =
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microsoftDemangle(S, nullptr, nullptr, nullptr, nullptr)) {
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Result = Demangled;
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std::free(Demangled);
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return Result;
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}
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return MangledName;
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}
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bool llvm::nonMicrosoftDemangle(const char *MangledName, std::string &Result) {
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char *Demangled = nullptr;
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if (isItaniumEncoding(MangledName))
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Demangled = itaniumDemangle(MangledName, nullptr, nullptr, nullptr);
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else if (isRustEncoding(MangledName))
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Demangled = rustDemangle(MangledName);
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else if (isDLangEncoding(MangledName))
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Demangled = dlangDemangle(MangledName);
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if (!Demangled)
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return false;
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Result = Demangled;
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std::free(Demangled);
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return true;
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}
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