/* queryswdb.c - Access to the SWDB file

 * Copyright (C) 2016 g10 Code GmbH

 *

 * This file is part of GPGME.

 *

 * GPGME 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.

 *

 * GPGME 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://gnu.org/licenses/>.

 * SPDX-License-Identifier: LGPL-2.1-or-later

 */

#if HAVE_CONFIG_H

#include <config.h>

#endif

#include <stdlib.h>

#include <assert.h>

#include "gpgme.h"

#include "debug.h"

#include "context.h"

#include "ops.h"

typedef struct

{

  struct _gpgme_op_query_swdb_result result;

} *op_data_t;

static void

release_op_data (void *hook)

{

  op_data_t opd = (op_data_t) hook;

  gpgme_query_swdb_result_t result = &opd->result;

  assert (!result->next);

  free (result->name);

  free (result->iversion);

  free (result->version);

}

gpgme_query_swdb_result_t

gpgme_op_query_swdb_result (gpgme_ctx_t ctx)

{

  void *hook;

  op_data_t opd;

  gpgme_error_t err;

  TRACE_BEG (DEBUG_CTX, "gpgme_op_query_swdb_result", ctx, "");

  err = _gpgme_op_data_lookup (ctx, OPDATA_QUERY_SWDB, &hook, -1, NULL);

  opd = hook;

  if (err || !opd)

    {

      TRACE_SUC ("result=(null)");

      return NULL;

    }

  TRACE_SUC ("result=%p", &opd->result);

  return &opd->result;

}

/* Query the swdb for software package NAME and check against the

 * installed version given by IVERSION.  If IVERSION is NULL a check

 * is only done if GPGME can figure out the version by itself

 * (e.g. for "gpgme" or "gnupg").  RESERVED should be 0.

 *

 * Note that we only implemented the synchronous variant of this

 * function but the API is prepared for an asynchronous variant.

 */

gpgme_error_t

gpgme_op_query_swdb (gpgme_ctx_t ctx, const char *name, const char *iversion,

                     unsigned int reserved)

{

  gpgme_error_t err;

  void *hook;

  op_data_t opd;

  TRACE_BEG  (DEBUG_CTX, "gpgme_op_query_swdb", ctx,

	      "name=%s, iversion=%s", name, iversion);

  if (!ctx || reserved)

    return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));

  if (ctx->protocol != GPGME_PROTOCOL_GPGCONF)

    return TRACE_ERR (gpg_error (GPG_ERR_UNSUPPORTED_PROTOCOL));

  if (!name)

    name = "gpgme";

  if (!iversion && !strcmp (name, "gpgme"))

    iversion = VERSION;

  err = _gpgme_op_reset (ctx, 1);

  if (err)

    return err;

  err = _gpgme_op_data_lookup (ctx, OPDATA_QUERY_SWDB, &hook,

                               sizeof (*opd), release_op_data);

  opd = hook;

  if (err)

    return TRACE_ERR (err);

  err = _gpgme_engine_op_query_swdb (ctx->engine, name, iversion,

                                     &opd->result);

  return TRACE_ERR (err);

}