Errnum.cpp 2.6 KB
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/******************************************************************************
 *                      Errnum.cpp
 *
 * This file is part of the Castor project.
 * See http://castor.web.cern.ch/castor
 *
 * Copyright (C) 2003  CERN
 * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 *
 *
 *
 * @author castor dev team
 *****************************************************************************/
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#include "castor/exception/Errnum.hpp"
#include "h/serrno.h"

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#include <errno.h>
#include <string.h>

using namespace castor::exception;

Errnum::Errnum(std::string what):Exception("") {
  m_errnum = errno;
  ErrnumConstructorBottomHalf(what);
}

Errnum::Errnum(int err, std::string what):Exception("") {
  m_errnum = err;
  ErrnumConstructorBottomHalf(what);
}

void Errnum::ErrnumConstructorBottomHalf(const std::string & what) {
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  char buf[100];

  if(sstrerror_r(m_errnum, buf, sizeof(buf))) {
    // sstrerror_r() failed
    const int new_errno = errno;
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    std::stringstream w;
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    w << "Errno=" << m_errnum << ". In addition, failed to read the corresponding error string (sstrerror_r gave errno="
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            << new_errno << ")";
    m_strerror = w.str();
  } else {
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    // sstrerror_r() succeeded
    m_strerror = buf;
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  }
  std::stringstream w2;
  if (what.size())
    w2 << what << " ";
  w2 << "Errno=" << m_errnum << ": " << m_strerror;
  getMessage().str(w2.str());
}

void Errnum::throwOnReturnedErrno (int err, std::string context) {
  if (err) throw Errnum(err, context);
}

void Errnum::throwOnNonZero(int status, std::string context) {
  if (status) throw Errnum(context);
}

void Errnum::throwOnZero(int status, std::string context) {
  if (!status) throw Errnum(context);
}

void Errnum::throwOnNull(void * f, std::string context) {
  if (NULL == f) throw Errnum(context);
}

void Errnum::throwOnNegative(int ret, std::string context) {
  if (ret < 0) throw Errnum(context);
}

void Errnum::throwOnMinusOne(int ret, std::string context) {
  if (-1 == ret) throw Errnum(context);
}