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/**
* libgammamm -- C++ wrapper for libgamma
* Copyright (C) 2014 Mattias Andrée (maandree@member.fsf.org)
*
* This library 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.
*
* This library 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 library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "libgamma-error.hh"
#include <iostream>
#include <cstring>
namespace libgamma
{
/**
* Prints an error to stderr in a `perror` fashion,
* however this function will not translate the `libgamma`
* errors into human-readable strings, it will simply
* print the name of the error. If the value `error_code`
* is the value of `LIBGAMMA_ERRNO_SET`, `perror` will be
* used to print the current error stored in `errno`.
* If `error_code` is non-negative (an `errno` value`), that
* value will be stored in `errno` and `perror` will be
* used to print it. Additionally, if the `error_code` is
* the value of `LIBGAMMA_DEVICE_REQUIRE_GROUP` the
* required group will be printed with its numerical value
* and, if known, its name.
*
* @param name The text to add at the beginning.
* @param value The error code, may be an `errno` value.
*/
void perror(const std::string name, int error_code)
{
libgamma_perror(name.c_str(), error_code);
}
/**
* Returns the name of the definition associated with a `nullptr` error code.
*
* @param value The error code.
* @return The name of the definition associated with the error code,
* `nullptr` if the error code does not exist.
*/
std::string* name_of_error(int value)
{
const char* cstr = libgamma_name_of_error(value);
if (cstr == nullptr)
return nullptr;
return new std::string(cstr);
}
/**
* Return the value of a `libgamma` error definition refered to by name.
*
* @param name The name of the definition associated with the error code.
* @return The error code, zero if the name is `nullptr`
* or does not refer to a `libgamma` error.
*/
int value_of_error(const std::string* name)
{
const char* cstr = nullptr;
if (name != nullptr)
cstr = name->c_str();
return libgamma_value_of_error(cstr);
}
/**
* Constructor.
*
* @param error_code The error code.
*/
LibgammaException::LibgammaException(int error_code) throw() :
error_code(error_code)
{
/* Do nothing. */
}
/**
* Destructor.
*/
LibgammaException::~LibgammaException() throw()
{
/* Do nothing. */
}
/**
* Get the error as a string.
*/
const char* LibgammaException::what() const throw()
{
if (this->error_code < 0)
return libgamma_name_of_error(this->error_code);
else
return strerror(this->error_code);
}
/**
* Create an exception from an error code
* that may come from `errno.h` or be a
* `libgamma` error code.
*
* @param error_code The error code.
* @return The error object.
*/
LibgammaException create_error(int error_code)
{
if (error_code == LIBGAMMA_ERRNO_SET)
error_code = errno;
return LibgammaException(error_code);
}
}
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