/* strerror-sym.c - Describing an error code with its symbol name.

   Copyright (C) 2003, 2004 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 <stddef.h>

#include <gpg-error.h>

#include "err-codes-sym.h"

#include "errnos-sym.h"

/* Return a pointer to a string containing the name of the symbol of

   the error code in the error value ERR.  Returns NULL if the error

   code is not known.  */

const char *

gpg_strerror_sym (gpg_error_t err)

{

  gpg_err_code_t code = gpg_err_code (err);

  if (code & GPG_ERR_SYSTEM_ERROR)

    {

      int idx;

      code &= ~GPG_ERR_SYSTEM_ERROR;

      idx = errnos_msgidxof (code);

      if (idx >= 0)

	return errnos_msgstr + errnos_msgidx[idx];

      else

	return NULL;

    }

  if (msgidxof (code) == msgidxof (GPG_ERR_CODE_DIM))

    return NULL;

  return msgstr + msgidx[msgidxof (code)];

}