code-to-errno.c
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code-to-errno.c
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	/* code-to-errno.c - Mapping error codes to errnos.
	Copyright (C) 2003 g10 Code GmbH

	This file is part of libgpg-error.

	libgpg-error 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 2.1 of
	the License, or (at your option) any later version.

	libgpg-error 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 libgpg-error; if not, write to the Free
	Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
	02111-1307, USA. */

	#if HAVE_CONFIG_H
	#include <config.h>
	#endif

	#include <gpg-error.h>

	#include "code-to-errno.h"

	/* Retrieve the system error for the error code CODE. This returns 0
	if CODE is not a system error code. */
	int
	_gpg_err_code_to_errno (gpg_err_code_t code)
	{
	if (!(code & GPG_ERR_SYSTEM_ERROR))
	return 0;
	code &= ~GPG_ERR_SYSTEM_ERROR;

	if (code < sizeof (err_code_to_errno) / sizeof (err_code_to_errno[0]))
	return err_code_to_errno[code];
	else
	return 0;
	}