/*

 * Extent functions

 *

 * Copyright (C) 2006-2026, Joachim Metz <joachim.metz@gmail.com>

 *

 * Refer to AUTHORS for acknowledgements.

 *

 * This program 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.

 *

 * This program 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 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 <common.h>

#include <memory.h>

#include <types.h>

#include "libewf_extent.h"

#include "libewf_lef_extent.h"

#include "libewf_libcerror.h"

#include "libewf_libcthreads.h"

#include "libewf_types.h"

/* Creates an extent

 * Make sure the value extent is referencing, is set to NULL

 * Returns 1 if successful or -1 on error

 */

int libewf_extent_initialize(

     libewf_extent_t **extent,

     libewf_lef_extent_t *lef_extent,

     libcerror_error_t **error )

{

  libewf_internal_extent_t *internal_extent = NULL;

  static char *function                     = "libewf_extent_initialize";

  if( extent == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid extent.",

     function );

    return( -1 );

  }

  if( *extent != NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

     "%s: invalid extent value already set.",

     function );

    return( -1 );

  }

  if( lef_extent == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid extent.",

     function );

    return( -1 );

  }

  internal_extent = memory_allocate_structure(

                     libewf_internal_extent_t );

  if( internal_extent == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to create extent.",

     function );

    goto on_error;

  }

  if( memory_set(

       internal_extent,

       0,

       sizeof( libewf_internal_extent_t ) ) == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_SET_FAILED,

     "%s: unable to clear extent.",

     function );

    memory_free(

     internal_extent );

    return( -1 );

  }

#if defined( HAVE_LIBEWF_MULTI_THREAD_SUPPORT )

  if( libcthreads_read_write_lock_initialize(

       &( internal_extent->read_write_lock ),

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to initialize read/write lock.",

     function );

    goto on_error;

  }

#endif

  internal_extent->lef_extent = lef_extent;

  *extent = (libewf_extent_t *) internal_extent;

  return( 1 );

on_error:

  if( internal_extent != NULL )

  {

    memory_free(

     internal_extent );

  }

  return( -1 );

}

/* Frees an extent

 * Returns 1 if successful or -1 on error

 */

int libewf_extent_free(

     libewf_extent_t **extent,

     libcerror_error_t **error )

{

  libewf_internal_extent_t *internal_extent = NULL;

  static char *function                     = "libewf_extent_free";

  int result                                = 1;

  if( extent == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid extent.",

     function );

    return( -1 );

  }

  if( *extent != NULL )

  {

    internal_extent = (libewf_internal_extent_t *) *extent;

    *extent         = NULL;

#if defined( HAVE_LIBEWF_MULTI_THREAD_SUPPORT )

    if( libcthreads_read_write_lock_free(

         &( internal_extent->read_write_lock ),

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,

       "%s: unable to free read/write lock.",

       function );

      result = -1;

    }

#endif

    memory_free(

     internal_extent );

  }

  return( result );

}