text: /*
   * Copyright (C) 2012 Free Software Foundation
   *
   * Author: Nikos Mavrogiannopoulos
   *
   * This file is part of libdane.
   *
   * libdane 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.
   *
   * 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
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public License
   * along with this program.  If not, see <https://www.gnu.org/licenses/>
   *
   */
  
  #include <config.h>
  #include <gnutls/dane.h>
  
  /* I18n of error codes. */
  #include "gettext.h"
  #define _(String) dgettext (PACKAGE, String)
  #define N_(String) gettext_noop (String)
  
  #define ERROR_ENTRY(desc, name) \
  	{ desc, #name, name}
  
  struct error_entry {
  	const char *desc;
  	const char *_name;
  	int number;
  };
  typedef struct error_entry error_entry;
  
  static const error_entry error_algorithms[] = {
  	ERROR_ENTRY(N_("Success."), DANE_E_SUCCESS),
  	ERROR_ENTRY(N_("There was error initializing the DNS query."),
  		    DANE_E_INITIALIZATION_ERROR),
  	ERROR_ENTRY(N_("There was an error while resolving."),
  		    DANE_E_RESOLVING_ERROR),
  	ERROR_ENTRY(N_("No DANE data were found."),
  		    DANE_E_NO_DANE_DATA),
  	ERROR_ENTRY(N_("Unknown DANE data were found."),
  		    DANE_E_UNKNOWN_DANE_DATA),
  	ERROR_ENTRY(N_("No DNSSEC signature was found."),
  		    DANE_E_NO_DNSSEC_SIG),
  	ERROR_ENTRY(N_("Received corrupt data."),
  		    DANE_E_RECEIVED_CORRUPT_DATA),
  	ERROR_ENTRY(N_("The DNSSEC signature is invalid."),
  		    DANE_E_INVALID_DNSSEC_SIG),
  	ERROR_ENTRY(N_("There was a memory error."),
  		    DANE_E_MEMORY_ERROR),
  	ERROR_ENTRY(N_("The requested data are not available."),
  		    DANE_E_REQUESTED_DATA_NOT_AVAILABLE),
  	ERROR_ENTRY(N_("The request is invalid."),
  		    DANE_E_INVALID_REQUEST),
  	ERROR_ENTRY(N_("There was an error in the certificate."),
  		    DANE_E_CERT_ERROR),
  	ERROR_ENTRY(N_("There was an error in the public key."),
  		    DANE_E_PUBKEY_ERROR),
  	ERROR_ENTRY(N_("No certificate was found."),
  		    DANE_E_NO_CERT),
  	ERROR_ENTRY(N_("Error in file."),
  		    DANE_E_FILE_ERROR),
  	{NULL, NULL, 0}
  };
  
  /**
   * dane_strerror:
   * @error: is a DANE error code, a negative error code
   *
   * This function is similar to strerror.  The difference is that it
   * accepts an error number returned by a gnutls function; In case of
   * an unknown error a descriptive string is sent instead of %NULL.
   *
   * Error codes are always a negative error code.
   *
   * Returns: A string explaining the DANE error message.
   **/
  const char *dane_strerror(int error)
  {
  	const char *ret = NULL;
  	const error_entry *p;
  
  	for (p = error_algorithms; p->desc != NULL; p++) {
  		if (p->number == error) {
  			ret = p->desc;
  			break;
  		}
  	}
  
  	/* avoid prefix */
  	if (ret == NULL)
  		return _("(unknown error code)");
  
  	return _(ret);
  }
  