/usr/include/sbuild/sbuild-error.h is in libsbuild-dev 1.6.8-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* schroot 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 3 of the License, or
* (at your option) any later version.
*
* schroot 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, see
* <http://www.gnu.org/licenses/>.
*
*********************************************************************/
#ifndef SBUILD_ERROR_H
#define SBUILD_ERROR_H
#include <map>
#include <stdexcept>
#include <string>
#include <typeinfo>
#include <boost/format.hpp>
#include <boost/type_traits.hpp>
namespace sbuild
{
/**
* Error exception base class.
*/
class error_base : public std::runtime_error
{
protected:
/**
* The constructor.
*
* @param error the error message.
*/
error_base(std::string const& error):
runtime_error(error),
reason()
{
}
/**
* The constructor.
*
* @param error the error message.
* @param reason further information about the error
*/
error_base(std::string const& error,
std::string const& reason):
runtime_error(error),
reason(reason)
{
}
public:
/// The destructor.
virtual ~error_base () throw ()
{}
/**
* Get the reason for the error.
*
* @returns the reason.
*/
virtual const char *
why () const throw ()
{
return this->reason.c_str();
}
/**
* Get the reason for the error.
*
* @returns the reason.
*/
std::string const&
get_reason () const
{
return this->reason;
}
/**
* Set the reason for the error.
*
* @param reason further information about the error
*/
void
set_reason (std::string const& reason)
{
this->reason = reason;
}
private:
/// The reason for the error.
std::string reason;
};
/**
* Error exception class.
*/
template <typename T>
class error : public error_base
{
public:
/// The enum type providing the error codes for this type.
typedef T error_type;
/// Mapping between error code and error description.
typedef std::map<error_type,const char *> map_type;
/**
* The constructor.
*
* @param error the error message.
*/
error(std::string const& error):
error_base(error)
{
}
/**
* The constructor.
*
* @param error the error message.
* @param reason further information about the error
*/
error(std::string const& error,
std::string const& reason):
error_base(error, reason)
{
}
/// The destructor.
virtual ~error () throw ()
{}
private:
/// Mapping between error code and string.
static map_type error_strings;
/**
* Get a translated error string.
*
* @param error the error code.
* @returns a translated error string.
*/
static const char *
get_error (error_type error);
protected:
/**
* Format an error message.
*
* @param context1 context of the error.
* @param context2 additional context of the error.
* @param context3 additional context of the error.
* @param error the error code.
* @param detail1 details of the error.
* @param detail2 additional details of the error.
* @param detail3 additional details of the error.
* @returns a translated error message.
*
* @todo Merge the logic shared between the two specialisations to
* prevent code duplication.
*/
template <typename A, typename B, typename C,
typename D, typename E, typename F>
static std::string
format_error (A const& context1,
B const& context2,
C const& context3,
error_type error,
D const& detail1,
E const& detail2,
F const& detail3);
/**
* Format an error message.
*
* @param context1 context of the error.
* @param context2 additional context of the error.
* @param context3 additional context of the error.
* @param error the error code.
* @param detail1 details of the error.
* @param detail2 additional details of the error.
* @param detail3 additional details of the error.
* @returns a translated error message.
*/
template <typename A, typename B, typename C,
typename D, typename E, typename F>
static std::string
format_error (A const& context1,
B const& context2,
C const& context3,
std::runtime_error const& error,
D const& detail1,
E const& detail2,
F const& detail3);
/**
* Format an reason string.
*
* @param context1 context of the error.
* @param context2 additional context of the error.
* @param context3 additional context of the error.
* @param error the error or error code.
* @param detail1 details of the error.
* @param detail2 additional details of the error.
* @param detail3 additional details of the error.
* @returns a translated error message.
*/
template <typename A, typename B, typename C,
typename R, typename D, typename E, typename F>
static std::string
format_reason (A const& context1,
B const& context2,
C const& context3,
R const& error,
D const& detail1,
E const& detail2,
F const& detail3);
/**
* Add detail to format string.
*
* @param fmt the format string.
* @param value the value to add.
*/
template<typename A>
static void
add_detail(boost::format& fmt,
A const& value);
/**
* Helper class to add detail to format string.
* Used for non-exception types.
*/
template<typename A, bool b>
struct add_detail_helper
{
/**
* The constructor.
*
* @param fmt the format string to add to.
* @param value the value to add.
*/
add_detail_helper(boost::format& fmt,
A const& value)
{
fmt % value;
}
};
/**
* Helper class to add detail to format string.
* Used for exception types.
*/
template<typename A>
struct add_detail_helper<A, true>
{
/**
* The constructor.
*
* @param fmt the format string to add to.
* @param value the exception to add.
*/
add_detail_helper(boost::format& fmt,
A const& value)
{
fmt % value.what();
}
};
/**
* Add reason to reason string.
*
* @param reason the reason string.
* @param value the value to add.
*/
template<typename A>
static void
add_reason(std::string& reason,
A const& value);
/**
* Helper class to add reason to reason string.
* Used for non-exception types.
*/
template<typename A, bool b>
struct add_reason_helper
{
/**
* The constructor.
*
* @param reason the reason to add to.
* @param value the value to add.
*/
add_reason_helper(std::string& reason,
A const& value)
{
}
};
/**
* Helper class to add reason to reason string.
* Used for exception types.
*/
template<typename A>
struct add_reason_helper<A, true>
{
/**
* The constructor.
*
* @param reason the reason to add to.
* @param value the exception to add.
*/
add_reason_helper(std::string& reason,
A const& value)
{
try
{
sbuild::error_base const& eb(dynamic_cast<sbuild::error_base const&>(value));
if (!reason.empty())
reason += '\n';
reason += eb.why();
}
catch (std::bad_cast const& discard)
{
}
}
};
};
}
#include "sbuild-error.tcc"
#endif /* SBUILD_ERROR_H */
/*
* Local Variables:
* mode:C++
* End:
*/
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