145 lines
3.3 KiB
C++
145 lines
3.3 KiB
C++
/******************************************************************************/
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/* Mednafen - Multi-system Emulator */
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/******************************************************************************/
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/* error.cpp:
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** Copyright (C) 2007-2016 Mednafen Team
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**
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** This program is free software; you can redistribute it and/or
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** modify it under the terms of the GNU General Public License
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** as published by the Free Software Foundation; either version 2
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** of the License, or (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software Foundation, Inc.,
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** 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "error.h"
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#include <cstdarg>
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#include <cstdio>
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#include <vector>
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MDFN_Error::MDFN_Error() noexcept
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{
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abort();
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}
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MDFN_Error::MDFN_Error(int errno_code_new, const char *format, ...) noexcept
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{
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errno_code = errno_code_new;
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va_list ap;
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va_start(ap, format);
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va_list ap_copy;
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va_copy(ap_copy, ap);
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std::vector<char> buf(1+vsnprintf(nullptr, 0, format, ap));
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va_end(ap);
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(void)vsnprintf(buf.data(), buf.size(),format, ap_copy);
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va_end(ap_copy);
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error_message = strdup(buf.data());
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va_end(ap);
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}
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MDFN_Error::MDFN_Error(const ErrnoHolder &enh)
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{
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errno_code = enh.Errno();
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error_message = strdup(enh.StrError());
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}
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MDFN_Error::~MDFN_Error() noexcept
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{
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if(error_message)
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{
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free(error_message);
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error_message = NULL;
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}
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}
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MDFN_Error::MDFN_Error(const MDFN_Error &ze_error) noexcept
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{
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if(ze_error.error_message)
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error_message = strdup(ze_error.error_message);
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else
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error_message = NULL;
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errno_code = ze_error.errno_code;
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}
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MDFN_Error& MDFN_Error::operator=(const MDFN_Error &ze_error) noexcept
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{
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char *new_error_message = ze_error.error_message ? strdup(ze_error.error_message) : NULL;
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int new_errno_code = ze_error.errno_code;
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if(error_message)
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free(error_message);
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error_message = new_error_message;
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errno_code = new_errno_code;
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return(*this);
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}
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const char * MDFN_Error::what(void) const noexcept
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{
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if(!error_message)
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return("Error allocating memory for the error message!");
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return(error_message);
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}
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int MDFN_Error::GetErrno(void) const noexcept
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{
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return(errno_code);
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}
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static MDFN_NOWARN_UNUSED const char *srr_wrap(int ret, const char *local_strerror)
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{
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if(ret == -1)
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return("ERROR IN strerror_r()!!!");
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return(local_strerror);
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}
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static MDFN_NOWARN_UNUSED const char *srr_wrap(const char *ret, const char *local_strerror)
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{
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if(ret == NULL)
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return("ERROR IN strerror_r()!!!");
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return(ret);
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}
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void ErrnoHolder::SetErrno(int the_errno)
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{
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local_errno = the_errno;
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if(the_errno == 0)
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local_strerror[0] = 0;
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else
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{
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#ifdef HAVE_STRERROR_R
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const char *retv;
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retv = srr_wrap(strerror_r(the_errno, local_strerror, 256), local_strerror);
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if(retv != local_strerror)
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strncpy(local_strerror, retv, 255);
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#else // No strerror_r :(
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strncpy(local_strerror, strerror(the_errno), 255);
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#endif
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local_strerror[255] = 0;
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}
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}
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