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// Copyright (c) 2006, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Author: Satoru Takabayashi
//
// An async-signal-safe and thread-safe demangler for Itanium C++ ABI
// (aka G++ V3 ABI).
// The demangler is implemented to be used in async signal handlers to
// symbolize stack traces. We cannot use libstdc++'s
// abi::__cxa_demangle() in such signal handlers since it's not async
// signal safe (it uses malloc() internally).
//
// Note that this demangler doesn't support full demangling. More
// specifically, it doesn't print types of function parameters and
// types of template arguments. It just skips them. However, it's
// still very useful to extract basic information such as class,
// function, constructor, destructor, and operator names.
//
// See the implementation note in demangle.cc if you are interested.
//
// Example:
//
// | Mangled Name | The Demangler | abi::__cxa_demangle()
// |---------------|---------------|-----------------------
// | _Z1fv | f() | f()
// | _Z1fi | f() | f(int)
// | _Z3foo3bar | foo() | foo(bar)
// | _Z1fIiEvi | f<>() | void f<int>(int)
// | _ZN1N1fE | N::f | N::f
// | _ZN3Foo3BarEv | Foo::Bar() | Foo::Bar()
// | _Zrm1XS_" | operator%() | operator%(X, X)
// | _ZN3FooC1Ev | Foo::Foo() | Foo::Foo()
// | _Z1fSs | f() | f(std::basic_string<char,
// | | | std::char_traits<char>,
// | | | std::allocator<char> >)
//
// See the unit test for more examples.
//
// Note: we might want to write demanglers for ABIs other than Itanium
// C++ ABI in the future.
//
#ifndef BASE_DEMANGLE_H_
#define BASE_DEMANGLE_H_
#include <stddef.h>
#include "config.h"
#include "glog/logging.h"
_START_GOOGLE_NAMESPACE_
// Demangle "mangled". On success, return true and write the
// demangled symbol name to "out". Otherwise, return false.
// "out" is modified even if demangling is unsuccessful.
bool GLOG_EXPORT Demangle(const char* mangled, char* out, size_t out_size);
_END_GOOGLE_NAMESPACE_
#endif // BASE_DEMANGLE_H_
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