map-display/include/boost/leaf/detail/demangle.hpp

#ifndef BOOST_LEAF_DETAIL_DEMANGLE_HPP_INCLUDED
#define BOOST_LEAF_DETAIL_DEMANGLE_HPP_INCLUDED

/// Copyright (c) 2018-2021 Emil Dotchevski and Reverge Studios, Inc.

/// Distributed under the Boost Software License, Version 1.0. (See accompanying
/// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

// core::demangle
//
// Copyright 2014 Peter Dimov
// Copyright 2014 Andrey Semashev
//
// Distributed under the Boost Software License, Version 1.0.
// See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt

#include <string>

#ifndef BOOST_LEAF_ENABLE_WARNINGS ///
#   if defined(_MSC_VER) ///
#       pragma warning(push,1) ///
#   elif defined(__clang__) ///
#       pragma clang system_header ///
#   elif (__GNUC__*100+__GNUC_MINOR__>301) ///
#       pragma GCC system_header ///
#   endif ///
#endif ///

#if defined(__has_include) && ((__GNUC__ + 0) >= 5)
#   if __has_include(<cxxabi.h>)
#       define BOOST_LEAF_HAS_CXXABI_H
#   endif
#elif defined(__GLIBCXX__) || defined(__GLIBCPP__)
#   define BOOST_LEAF_HAS_CXXABI_H
#endif

#if defined( BOOST_LEAF_HAS_CXXABI_H )
#   include <cxxabi.h>
// For some architectures (mips, mips64, x86, x86_64) cxxabi.h in Android NDK is implemented by gabi++ library
// (https://android.googlesource.com/platform/ndk/+/master/sources/cxx-stl/gabi++/), which does not implement
// abi::__cxa_demangle(). We detect this implementation by checking the include guard here.
#   if defined( __GABIXX_CXXABI_H__ )
#       undef BOOST_LEAF_HAS_CXXABI_H
#   else
#       include <cstddef>
#   endif
#endif

namespace boost { namespace leaf {

namespace leaf_detail
{
    inline char const * demangle_alloc( char const * name ) noexcept;
    inline void demangle_free( char const * name ) noexcept;

    class scoped_demangled_name
    {
    private:

        char const * m_p;

    public:

        explicit scoped_demangled_name( char const * name ) noexcept :
            m_p( demangle_alloc( name ) )
        {
        }

        ~scoped_demangled_name() noexcept
        {
            demangle_free( m_p );
        }

        char const * get() const noexcept
        {
            return m_p;
        }

        scoped_demangled_name( scoped_demangled_name const& ) = delete;
        scoped_demangled_name& operator= ( scoped_demangled_name const& ) = delete;
    };

#if defined( BOOST_LEAF_HAS_CXXABI_H )

    inline char const * demangle_alloc( char const * name ) noexcept
    {
        int status = 0;
        std::size_t size = 0;
        return abi::__cxa_demangle( name, NULL, &size, &status );
    }

    inline void demangle_free( char const * name ) noexcept
    {
        std::free( const_cast< char* >( name ) );
    }

    inline std::string demangle( char const * name )
    {
        scoped_demangled_name demangled_name( name );
        char const * p = demangled_name.get();
        if( !p )
            p = name;
        return p;
    }

#else

    inline char const * demangle_alloc( char const * name ) noexcept
    {
        return name;
    }

    inline void demangle_free( char const * ) noexcept
    {
    }

    inline char const * demangle( char const * name )
    {
        return name;
    }

#endif
}

} }

#ifdef BOOST_LEAF_HAS_CXXABI_H
#   undef BOOST_LEAF_HAS_CXXABI_H
#endif

#if defined(_MSC_VER) && !defined(BOOST_LEAF_ENABLE_WARNINGS) ///
#pragma warning(pop) ///
#endif ///

#endif