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/* -*- mode: C++; indent-tabs-mode: nil; -*-
*
* This file is a part of LEMON, a generic C++ optimization library.
*
* Copyright (C) 2003-2009
* Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
* (Egervary Research Group on Combinatorial Optimization, EGRES).
*
* Permission to use, modify and distribute this software is granted
* provided that this copyright notice appears in all copies. For
* precise terms see the accompanying LICENSE file.
*
* This software is provided "AS IS" with no warranty of any kind,
* express or implied, and with no claim as to its suitability for any
* purpose.
*
*/
#ifndef LEMON_ERROR_H
#define LEMON_ERROR_H
/// \ingroup exceptions
/// \file
/// \brief Basic exception classes and error handling.
#include <exception>
#include <string>
#include <sstream>
#include <iostream>
#include <cstdlib>
#include <memory>
namespace lemon {
/// \addtogroup exceptions
/// @{
/// \brief Generic exception class.
///
/// Base class for exceptions used in LEMON.
///
class Exception : public std::exception {
public:
///Constructor
Exception() throw() {}
///Virtual destructor
virtual ~Exception() throw() {}
///A short description of the exception
virtual const char* what() const throw() {
return "lemon::Exception";
}
};
/// \brief Input-Output error
///
/// This exception is thrown when a file operation cannot be
/// succeeded.
class IoError : public Exception {
protected:
std::string _message;
std::string _file;
mutable std::string _what;
public:
/// Copy constructor
IoError(const IoError &error) throw() : Exception() {
message(error._message);
file(error._file);
}
/// Constructor
explicit IoError(const char *message) throw() {
IoError::message(message);
}
/// Constructor
explicit IoError(const std::string &message) throw() {
IoError::message(message);
}
/// Constructor
explicit IoError(const char *message,
const std::string &file) throw() {
IoError::message(message);
IoError::file(file);
}
/// Constructor
explicit IoError(const std::string &message,
const std::string &file) throw() {
IoError::message(message);
IoError::file(file);
}
/// Virtual destructor
virtual ~IoError() throw() {}
/// Set the error message
void message(const char *message) throw() {
try {
_message = message;
} catch (...) {}
}
/// Set the error message
void message(const std::string& message) throw() {
try {
_message = message;
} catch (...) {}
}
/// Set the file name
void file(const std::string &file) throw() {
try {
_file = file;
} catch (...) {}
}
/// Returns the error message
const std::string& message() const throw() {
return _message;
}
/// \brief Returns the filename
///
/// Returns the filename or an empty string if it was not specified.
const std::string& file() const throw() {
return _file;
}
/// \brief Returns a short error message
///
/// Returns a short error message which contains the message and the
/// file name.
virtual const char* what() const throw() {
try {
_what.clear();
std::ostringstream oss;
oss << "lemon:IoError" << ": ";
oss << _message;
if (!_file.empty()) {
oss << " ('" << _file << "')";
}
_what = oss.str();
}
catch (...) {}
if (!_what.empty()) return _what.c_str();
else return "lemon:IoError";
}
};
/// \brief Format error
///
/// This exception is thrown when an input file has wrong
/// format or a data representation is not legal.
class FormatError : public Exception {
protected:
std::string _message;
std::string _file;
int _line;
mutable std::string _what;
public:
/// Copy constructor
FormatError(const FormatError &error) throw() : Exception() {
message(error._message);
file(error._file);
line(error._line);
}
/// Constructor
explicit FormatError(const char *message) throw() {
FormatError::message(message);
_line = 0;
}
/// Constructor
explicit FormatError(const std::string &message) throw() {
FormatError::message(message);
_line = 0;
}
/// Constructor
explicit FormatError(const char *message,
const std::string &file, int line = 0) throw() {
FormatError::message(message);
FormatError::file(file);
FormatError::line(line);
}
/// Constructor
explicit FormatError(const std::string &message,
const std::string &file, int line = 0) throw() {
FormatError::message(message);
FormatError::file(file);
FormatError::line(line);
}
/// Virtual destructor
virtual ~FormatError() throw() {}
/// Set the line number
void line(int line) throw() { _line = line; }
/// Set the error message
void message(const char *message) throw() {
try {
_message = message;
} catch (...) {}
}
/// Set the error message
void message(const std::string& message) throw() {
try {
_message = message;
} catch (...) {}
}
/// Set the file name
void file(const std::string &file) throw() {
try {
_file = file;
} catch (...) {}
}
/// \brief Returns the line number
///
/// Returns the line number or zero if it was not specified.
int line() const throw() { return _line; }
/// Returns the error message
const std::string& message() const throw() {
return _message;
}
/// \brief Returns the filename
///
/// Returns the filename or an empty string if it was not specified.
const std::string& file() const throw() {
return _file;
}
/// \brief Returns a short error message
///
/// Returns a short error message which contains the message, the
/// file name and the line number.
virtual const char* what() const throw() {
try {
_what.clear();
std::ostringstream oss;
oss << "lemon:FormatError" << ": ";
oss << _message;
if (!_file.empty() || _line != 0) {
oss << " (";
if (!_file.empty()) oss << "in file '" << _file << "'";
if (!_file.empty() && _line != 0) oss << " ";
if (_line != 0) oss << "at line " << _line;
oss << ")";
}
_what = oss.str();
}
catch (...) {}
if (!_what.empty()) return _what.c_str();
else return "lemon:FormatError";
}
};
/// @}
}
#endif // LEMON_ERROR_H
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