syserr.cpp

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/***************************************************************************
 *   Copyright (C) 2007-2013 Mike Kinghan, imk@burroingroingjoing.com      *
 *   All rights reserved.                                                  *
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 *   Contributed originally by Mike Kinghan, imk@burroingroingjoing.com    *
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#include "platform.h"
#include "syserr.h"

using namespace std;

template<char Delim>
string system_error_message(unsigned errnum);

#if PATH_DELIM == '/'
#include <cstring>

template<>
string system_error_message<'/'>(unsigned errnum)
{
        return strerror(errnum);
}

#else
#include <sstream>
#include <windows.h>

template<>
string system_error_message<'\\'>(unsigned errnum)
{
        std::ostringstream gripe;
        LPTSTR mess_buf = 0;
        DWORD chars = FormatMessage(
                          FORMAT_MESSAGE_ALLOCATE_BUFFER |
                                                FORMAT_MESSAGE_FROM_SYSTEM,
                          nullptr,
                          errnum,
                          LANG_USER_DEFAULT,
                          (LPTSTR)&mess_buf,
                          0,
                          nullptr);
        if (!chars) {
                gripe << "system error " << errnum;
        } else {
                gripe << mess_buf;
        }
        if (mess_buf) {
                LocalFree(mess_buf);
        }
        return gripe.str();
}

#endif

std::string system_error_message(unsigned errnum)
{
        return system_error_message<PATH_DELIM>(errnum);
}

// EOF