demangle.cpp

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// Copyright (c) 2019-2025  Made to Order Software Corp.  All Rights Reserved
//
// https://snapwebsites.org/project/libexcept
// contact@m2osw.com
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
// self
//
#include    "libexcept/demangle.h"
 
 
// C++
//
#include    <cxxabi.h>
#include    <memory>
 
 
namespace libexcept
{
 
 
 
std::string demangle_cpp_name(char const * type_id_name)
{
#if 1
    int status(0);
 
    std::unique_ptr<char, void(*)(void*)> res {
        abi::__cxa_demangle(type_id_name, nullptr, nullptr, &status),
        std::free
    };
 
    return status == 0 && res.get() != nullptr
                ? res.get()
                : type_id_name;
#else
    // keeping the fallback in case the ABI stops working over time
    // this is "very" slow since it runs an external tool (c++filt)
    //
    std::string cppfilt("c++filt "
                      + raw_function_name);
    std::unique_ptr<FILE, decltype(&::pclose)> p(popen(cppfilt.c_str(), "r"), &::pclose);
    for(;;)
    {
        int const c(fgetc(p.get()));
        if(c == EOF)
        {
            break;
        }
        if(c != '\n')
        {
            result += c;
        }
    }
#endif
}
 
 
 
}
// namespace libexcept
// vim: ts=4 sw=4 et