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/*
* Debian menu system -- update-menus and install-menu
* update-menus/exceptions.h
*
* Copyright (C) 1996-2003 Joost Witteveen,
* Copyright (C) 2002-2004 Bill Allombert and Morten Brix Pedersen.
*
* 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 with
* the Debian GNU/Linux distribution in file /usr/share/common-licenses/GPL;
* if not, write to the Free Software Foundation, Inc., 59 Temple Place,
* Suite 330, Boston, MA 02111-1307 USA
*
*
* Written by Joost Witteveen.
*/
#ifndef EXCEPTIONS_H
#define EXCEPTIONS_H
#include <string>
#include <iostream>
#include "common.h"
#include "compose.hpp"
namespace exceptions {
/** Base class for general exceptions */
class genexcept {
public:
virtual void report() {
std::cerr << message() << std::endl;
}
virtual std::string message() const {
return _("Unknown error.");
}
virtual ~genexcept() { }
};
/** Base exception class for classes returning string error messages */
class except_string : public genexcept {
protected:
std::string msg;
public:
except_string(std::string s) : msg(s) { }
std::string message() const {
return String::compose(_("Unknown error, message=%1"), msg);
}
};
/** Exception class to be thrown when a file fails to open */
class ferror_open : public except_string {
public:
ferror_open(std::string s):except_string(s) { }
std::string message() const {
return String::compose(_("Unable to open file \"%1\"."), msg);
}
};
/** Exception class to be thrown when opening a pipe for reading */
class pipeerror_read : public except_string {
public:
pipeerror_read(std::string s) : except_string(s) { }
std::string message() {
return String::compose(_("Failed to pipe data through \"%1\" (pipe opened for reading)."), msg);
}
};
/** Exception class to be thrown when a fatal error occured */
class informed_fatal : public genexcept {
public:
std::string message() const { return ""; }
};
/** Exception to be thrown when a required tag is missing */
class missing_tag : public except_string {
std::string file;
public:
missing_tag(std::string f, std::string s) : except_string(s), file(f) { }
std::string message() {
return String::compose(_("%1: missing required tag: \"%2\""), file, msg);
}
};
/** Exception to be thrown when package isn't installed. */
class cond_inst_false : public genexcept { };
/** Exception to be thrown when opening a directory failed */
class dir_error_read : public genexcept { };
}
#endif /* EXCEPTIONS_H */
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