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// exceptions.h -*-c++-*-
//
// Copyright (C) 2005, 2007, 2010 Daniel Burrows
//
// 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; see the file COPYING. If not, write to
// the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.
#ifndef EXCEPTIONS_H
#define EXCEPTIONS_H
#include <cwidget/generic/util/exception.h>
#include <aptitude.h> // For _()
/** \file exceptions.h
*/
/** Generic errors in the problem resolver. */
class ProblemResolverError : public cwidget::util::Exception {
};
/** An exception indicating that no more solutions are available. */
class NoMoreSolutions : public ProblemResolverError {
std::string errmsg() const
{
return "No more solutions to this dependency problem.";
}
};
/** An exception indicating that the resolver ran out of time to
* find a solution.
*/
class NoMoreTime:public ProblemResolverError {
std::string errmsg() const
{
return "No more time to solve this dependency problem.";
}
};
/** An exception indicating that the resolver was interrupted from
* another thread.
*/
class InterruptedException : public ProblemResolverError {
int steps;
public:
InterruptedException(int _steps)
: steps(_steps)
{
}
/** \brief Return the number of steps after which the resolver was
* interrupted.
*/
int get_steps() const { return steps; }
std::string errmsg() const
{
return "Dependency solution was interrupted.";
}
};
/** An exception indicating that an internal error occurred. */
class ResolverInternalErrorException : public ProblemResolverError {
std::string msg;
public:
ResolverInternalErrorException(const std::string &_msg)
: msg(_msg)
{
}
std::string errmsg() const
{
return msg;
}
};
/** An exception indicating that two threads tried to run the resolver
* at once.
*/
class DoubleRunException : public ProblemResolverError {
std::string errmsg() const
{
return "Internal error: Multiple threads of execution tried to enter the resolver at once.";
}
};
/** An exception indicating that something tried to add a nonpositive
* quantity to a cost.
*/
class NonPositiveCostAdditionException : public ProblemResolverError {
std::string errmsg() const
{
return _("Cost increments must be strictly positive.");
}
};
/** An exception indicating that a cost addition overflowed.
*/
class CostTooBigException : public ProblemResolverError {
std::string errmsg() const
{
return _("The maximum cost value was exceeded.");
}
};
/** An exception indicating that incompatible operations were applied
* to a cost.
*/
class CostOperationMismatchException : public ProblemResolverError {
std::string errmsg() const
{
return _("A single cost level was both added and lower-bounded.");
}
};
#endif // EXCEPTIONS_H
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