sortix--sortix/libc/string/strerror_r.cpp

/*******************************************************************************

    Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013, 2014.

    This file is part of the Sortix C Library.

    The Sortix C Library is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation, either version 3 of the License, or (at your
    option) any later version.

    The Sortix C 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 Lesser General Public
    License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.

    string/strerror_r.cpp
    Convert error code to a string.

*******************************************************************************/

#include <errno.h>
#include <string.h>

extern "C" int strerror_r(int errnum, char* dest, size_t dest_len)
{
	const char* msg = sortix_strerror(errnum);
	if ( !msg )
		return -1;
	if ( dest_len < strlen(msg) + 1 )
		return errno = ERANGE;
	strcpy(dest, msg);
	return 0;
}