/*

 * The handle functions

 *

 * Copyright (C) 2009-2022, 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>

#if defined( HAVE_UNISTD_H )

#include <unistd.h>

#endif

#include "libbfio_definitions.h"

#include "libbfio_handle.h"

#include "libbfio_libcdata.h"

#include "libbfio_libcerror.h"

/* Creates a handle

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

 * Returns 1 if successful or -1 on error

 */

int libbfio_handle_initialize(

      libbfio_handle_t **handle,

      intptr_t *io_handle,

      int (*free_io_handle)(

             intptr_t **io_handle,

             libcerror_error_t **error ),

      int (*clone_io_handle)(

             intptr_t **destination_io_handle,

             intptr_t *source_io_handle,

             libcerror_error_t **error ),

      int (*open)(

             intptr_t *io_handle,

             int access_flags,

             libcerror_error_t **error ),

      int (*close)(

             intptr_t *io_handle,

             libcerror_error_t **error ),

      ssize_t (*read)(

                 intptr_t *io_handle,

                 uint8_t *buffer,

                 size_t size,

                 libcerror_error_t **error ),

      ssize_t (*write)(

                 intptr_t *io_handle,

                 const uint8_t *buffer,

                 size_t size,

                 libcerror_error_t **error ),

      off64_t (*seek_offset)(

                 intptr_t *io_handle,

                 off64_t offset,

                 int whence,

                 libcerror_error_t **error ),

      int (*exists)(

             intptr_t *io_handle,

             libcerror_error_t **error ),

      int (*is_open)(

             intptr_t *io_handle,

             libcerror_error_t **error ),

      int (*get_size)(

             intptr_t *io_handle,

             size64_t *size,

             libcerror_error_t **error ),

      uint8_t flags,

      libcerror_error_t **error )

{

  libbfio_internal_handle_t *internal_handle = NULL;

  static char *function                      = "libbfio_handle_initialize";

  if( handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid handle.",

     function );

    return( -1 );

  }

  if( *handle != NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

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

     function );

    return( -1 );

  }

  internal_handle = memory_allocate_structure(

                     libbfio_internal_handle_t );

  if( internal_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,

     "%s: unable to create handle.",

     function );

    goto on_error;

  }

  if( memory_set(

       internal_handle,

       0,

       sizeof( libbfio_internal_handle_t ) ) == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_SET_FAILED,

     "%s: unable to clear handle.",

     function );

    memory_free(

     internal_handle );

    return( -1 );

  }

  if( libcdata_range_list_initialize(

       &( internal_handle->offsets_read ),

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to create read offsets list.",

     function );

    goto on_error;

  }

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

  if( libcthreads_read_write_lock_initialize(

       &( internal_handle->read_write_lock ),

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

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

     function );

    goto on_error;

  }

#endif

  internal_handle->io_handle       = io_handle;

  internal_handle->flags           = flags;

  internal_handle->free_io_handle  = free_io_handle;

  internal_handle->clone_io_handle = clone_io_handle;

  internal_handle->open            = open;

  internal_handle->close           = close;

  internal_handle->read            = read;

  internal_handle->write           = write;

  internal_handle->seek_offset     = seek_offset;

  internal_handle->exists          = exists;

  internal_handle->is_open         = is_open;

  internal_handle->get_size        = get_size;

  *handle = (libbfio_handle_t *) internal_handle;

  return( 1 );

on_error:

  if( internal_handle != NULL )

  {

    if( internal_handle->offsets_read != NULL )

    {

      libcdata_range_list_free(

       &( internal_handle->offsets_read ),

       NULL,

       NULL );

    }

    memory_free(

     internal_handle );

  }

  return( -1 );

}

/* Frees a handle

 * Returns 1 if successful or -1 on error

 */

int libbfio_handle_free(

     libbfio_handle_t **handle,

     libcerror_error_t **error )

{

  libbfio_internal_handle_t *internal_handle = NULL;

  static char *function                      = "libbfio_handle_free";

  int is_open                                = 0;

  int result                                 = 1;

  if( handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid handle.",

     function );

    return( -1 );

  }

  if( *handle != NULL )

  {

    internal_handle = (libbfio_internal_handle_t *) *handle;

    *handle         = NULL;

    if( internal_handle->is_open != NULL )

    {

      is_open = internal_handle->is_open(

           internal_handle->io_handle,

                 error );

      if( is_open == -1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_IO,

         LIBCERROR_IO_ERROR_OPEN_FAILED,

         "%s: unable to determine if handle is open.",

         function );

        result = -1;

      }

    }

    if( is_open != 0 )

    {

      if( internal_handle->close != NULL )

      {

        if( internal_handle->close(

             internal_handle->io_handle,

             error ) != 0 )

        {

          libcerror_error_set(

           error,

           LIBCERROR_ERROR_DOMAIN_IO,

           LIBCERROR_IO_ERROR_CLOSE_FAILED,

           "%s: unable to close handle.",

           function );

          result = -1;

        }

      }

    }

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

    if( libcthreads_read_write_lock_free(

         &( internal_handle->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

    if( ( internal_handle->flags & LIBBFIO_FLAG_IO_HANDLE_MANAGED ) != 0 )

    {

      if( internal_handle->io_handle != NULL )

      {

        if( internal_handle->free_io_handle == NULL )

        {

          memory_free(

           internal_handle->io_handle );

        }

        else if( internal_handle->free_io_handle(

            &( internal_handle->io_handle ),

            error ) != 1 )

        {

          libcerror_error_set(

           error,

           LIBCERROR_ERROR_DOMAIN_RUNTIME,

           LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,

           "%s: unable to free IO handle.",

           function );

          result = -1;

        }

      }

    }

    if( internal_handle->offsets_read != NULL )

    {

      if( libcdata_range_list_free(

           &( internal_handle->offsets_read ),

           NULL,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,

         "%s: unable to free read offsets list.",

         function );

        result = -1;

      }

    }

    memory_free(

     internal_handle );

  }

  return( result );

}

/* Clones (duplicates) the handle

 * The values in the offsets read list are not duplicated

 * Returns 1 if successful or -1 on error

 */

int libbfio_handle_clone(

     libbfio_handle_t **destination_handle,

     libbfio_handle_t *source_handle,

     libcerror_error_t **error )

{

  libbfio_internal_handle_t *internal_source_handle = NULL;

  intptr_t *destination_io_handle                   = NULL;

  static char *function                             = "libbfio_handle_clone";

  uint8_t destination_flags                         = 0;

  if( destination_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid destination handle.",

     function );

    return( -1 );

  }

  if( *destination_handle != NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

     "%s: destination handle already set.",

     function );

    return( -1 );

  }

  if( source_handle == NULL )

  {

    *destination_handle = NULL;

    return( 1 );

  }

  internal_source_handle = (libbfio_internal_handle_t *) source_handle;

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

  if( libcthreads_read_write_lock_grab_for_read(

       internal_source_handle->read_write_lock,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_SET_FAILED,

     "%s: unable to grab read/write lock for reading.",

     function );

    return( -1 );

  }

#endif

  if( internal_source_handle->io_handle != NULL )

  {

    if( ( internal_source_handle->flags & LIBBFIO_FLAG_IO_HANDLE_CLONE_BY_REFERENCE ) != 0 )

    {

      destination_io_handle = internal_source_handle->io_handle;

      destination_flags = LIBBFIO_FLAG_IO_HANDLE_CLONE_BY_REFERENCE;

    }

    else

    {

      if( internal_source_handle->clone_io_handle == NULL )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

         "%s: invalid handle - missing clone IO handle function.",

         function );

        goto on_error;

      }

      if( internal_source_handle->clone_io_handle(

           &destination_io_handle,

           internal_source_handle->io_handle,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

         "%s: unable to clone IO handle.",

         function );

        goto on_error;

      }

      destination_flags = LIBBFIO_FLAG_IO_HANDLE_MANAGED;

    }

  }

  if( libbfio_handle_initialize(

       destination_handle,

       destination_io_handle,

       internal_source_handle->free_io_handle,

       internal_source_handle->clone_io_handle,

       internal_source_handle->open,

       internal_source_handle->close,

       internal_source_handle->read,

       internal_source_handle->write,

       internal_source_handle->seek_offset,

       internal_source_handle->exists,

       internal_source_handle->is_open,

       internal_source_handle->get_size,

       destination_flags,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to create destination handle.",

     function );

    goto on_error;

  }

  destination_io_handle = NULL;

  if( internal_source_handle->access_flags != 0 )

  {

    if( libbfio_handle_open(

         *destination_handle,

         internal_source_handle->access_flags,

         error ) == -1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_IO,

       LIBCERROR_IO_ERROR_OPEN_FAILED,

       "%s: unable to open destination handle.",

       function );

      goto on_error;

    }

    if( libbfio_handle_seek_offset(

         *destination_handle,

         internal_source_handle->current_offset,

         SEEK_SET,

         error ) == -1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_IO,

       LIBCERROR_IO_ERROR_SEEK_FAILED,

       "%s: unable to seek offset in destination handle.",

       function );

      goto on_error;

    }

  }

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

  if( libcthreads_read_write_lock_release_for_read(

       internal_source_handle->read_write_lock,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_SET_FAILED,

     "%s: unable to release read/write lock for reading.",

     function );

    libbfio_handle_free(

     destination_handle,

     NULL );

    return( -1 );

  }

#endif

  return( 1 );

on_error:

  if( ( destination_io_handle != NULL )

   && ( ( destination_flags & LIBBFIO_FLAG_IO_HANDLE_MANAGED ) != 0 ) )

  {

    if( internal_source_handle->free_io_handle == NULL )

    {

      memory_free(

       destination_io_handle );

    }

    else

    {

      internal_source_handle->free_io_handle(

       &destination_io_handle,

       NULL );

    }

  }

  if( destination_handle != NULL )

  {

    libbfio_handle_free(

     destination_handle,

     NULL );

  }

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

  libcthreads_read_write_lock_release_for_read(

   internal_source_handle->read_write_lock,

   NULL );

#endif

  return( -1 );

}

/* Opens the handle

 * Returns 1 if successful or -1 on error

 */

int libbfio_handle_open(

     libbfio_handle_t *handle,

     int access_flags,

     libcerror_error_t **error )

{

  libbfio_internal_handle_t *internal_handle = NULL;

  static char *function                      = "libbfio_handle_open";

  if( handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid handle.",

     function );

    return( -1 );

  }

  internal_handle = (libbfio_internal_handle_t *) handle;

  if( internal_handle->io_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: invalid handle - missing IO handle.",

     function );

    return( -1 );

  }

  if( internal_handle->open == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: invalid handle - missing open function.",

     function );

    return( -1 );

  }

  if( ( ( access_flags & LIBBFIO_ACCESS_FLAG_READ ) == 0 )

   && ( ( access_flags & LIBBFIO_ACCESS_FLAG_WRITE ) == 0 ) )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE,

     "%s: unsupported access flags: 0x%02x.",

     function,

     access_flags );

    return( -1 );

  }

  if( ( internal_handle->open_on_demand != 0 )

   && ( ( access_flags & LIBBFIO_ACCESS_FLAG_WRITE ) != 0 ) )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE,

     "%s: open on demand cannot be used in combination with write access.",

     function );

    return( -1 );

  }

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

  if( libcthreads_read_write_lock_grab_for_write(

       internal_handle->read_write_lock,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_SET_FAILED,

     "%s: unable to grab read/write lock for writing.",

     function );

    return( -1 );

  }

#endif

  if( internal_handle->open_on_demand == 0 )

  {

    if( internal_handle->open(

         internal_handle->io_handle,

         access_flags,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_IO,

       LIBCERROR_IO_ERROR_OPEN_FAILED,

       "%s: unable to open handle.",

       function );

      goto on_error;

    }

  }

  internal_handle->access_flags = access_flags;

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

  if( libcthreads_read_write_lock_release_for_write(

       internal_handle->read_write_lock,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_SET_FAILED,

     "%s: unable to release read/write lock for writing.",

     function );

    return( -1 );

  }

#endif

  return( 1 );

on_error:

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

  libcthreads_read_write_lock_release_for_write(

   internal_handle->read_write_lock,

   NULL );

#endif

  return( -1 );

}

/* Reopens the handle

 * Returns 1 if successful or -1 on error

 */

int libbfio_handle_reopen(

     libbfio_handle_t *handle,

     int access_flags,

     libcerror_error_t **error )

{

  libbfio_internal_handle_t *internal_handle = NULL;

  static char *function                      = "libbfio_handle_reopen";

  if( handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid handle.",

     function );

    return( -1 );

  }

  internal_handle = (libbfio_internal_handle_t *) handle;

  if( internal_handle->io_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: invalid handle - missing IO handle.",

     function );

    return( -1 );

  }

  if( internal_handle->close == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: invalid handle - missing close function.",

     function );

    return( -1 );

  }

  if( internal_handle->open == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: invalid handle - missing open function.",

     function );

    return( -1 );

  }

  if( internal_handle->seek_offset == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: invalid handle - missing seek offset function.",

     function );

    return( -1 );

  }

  if( ( ( access_flags & LIBBFIO_ACCESS_FLAG_READ ) == 0 )

   && ( ( access_flags & LIBBFIO_ACCESS_FLAG_WRITE ) == 0 ) )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE,

     "%s: unsupported access flags.",

     function );

    return( -1 );

  }

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

  if( libcthreads_read_write_lock_grab_for_write(

       internal_handle->read_write_lock,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_SET_FAILED,

     "%s: unable to grab read/write lock for writing.",

     function );

    return( -1 );

  }

#endif

  /* Only reopen if the access flags have changed

   */

  if( internal_handle->access_flags != access_flags )

  {

    if( internal_handle->close(

         internal_handle->io_handle,

         error ) != 0 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_IO,

       LIBCERROR_IO_ERROR_CLOSE_FAILED,

       "%s: unable to close handle.",

       function );

      goto on_error;

    }

    if( internal_handle->open_on_demand == 0 )

    {

      if( internal_handle->open(

           internal_handle->io_handle,

           access_flags,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_IO,

         LIBCERROR_IO_ERROR_OPEN_FAILED,

         "%s: unable to open handle.",

         function );

        goto on_error;

      }

    }

    internal_handle->access_flags = access_flags;

    if( internal_handle->open_on_demand == 0 )

    {

      /* Seek the previous file offset only when at least reading the file

       */

      if( ( internal_handle->access_flags & LIBBFIO_ACCESS_FLAG_READ ) != 0 )

      {

        if( internal_handle->seek_offset(

             internal_handle->io_handle,

             internal_handle->current_offset,

             SEEK_CUR,

             error ) == -1 )

        {

          libcerror_error_set(

           error,

           LIBCERROR_ERROR_DOMAIN_IO,

           LIBCERROR_IO_ERROR_SEEK_FAILED,

           "%s: unable to seek offset in handle.",

           function );

          goto on_error;

        }

      }

    }

  }

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

  if( libcthreads_read_write_lock_release_for_write(

       internal_handle->read_write_lock,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_SET_FAILED,

     "%s: unable to release read/write lock for writing.",

     function );

    return( -1 );

  }

#endif

  return( 1 );

on_error:

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

  libcthreads_read_write_lock_release_for_write(

   internal_handle->read_write_lock,

   NULL );

#endif

  return( -1 );

}

/* Closes the handle

 * Returns 0 if successful or -1 on error

 */

int libbfio_handle_close(

     libbfio_handle_t *handle,

     libcerror_error_t **error )

{

  libbfio_internal_handle_t *internal_handle = NULL;

  static char *function                      = "libbfio_handle_close";

  int is_open                                = 1;

  if( handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid handle.",

     function );

    return( -1 );

  }

  internal_handle = (libbfio_internal_handle_t *) handle;

  if( internal_handle->io_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: invalid handle - missing IO handle.",

     function );

    return( -1 );

  }

  if( internal_handle->close == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: invalid handle - missing close function.",

     function );

    return( -1 );

  }

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

  if( libcthreads_read_write_lock_grab_for_write(

       internal_handle->read_write_lock,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_SET_FAILED,

     "%s: unable to grab read/write lock for writing.",

     function );

    return( -1 );

  }

#endif

  if( internal_handle->open_on_demand != 0 )

  {

    if( internal_handle->is_open == NULL )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

       "%s: invalid handle - missing is open function.",

       function );

      goto on_error;

    }

    is_open = internal_handle->is_open(

         internal_handle->io_handle,

               error );

    if( is_open == -1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_IO,

       LIBCERROR_IO_ERROR_OPEN_FAILED,

       "%s: unable to determine if handle is open.",

       function );

      goto on_error;

    }

  }

  if( is_open != 0 )

  {

    if( internal_handle->close(

         internal_handle->io_handle,

         error ) != 0 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_IO,

       LIBCERROR_IO_ERROR_CLOSE_FAILED,

       "%s: unable to close handle.",

       function );

      goto on_error;

    }

  }

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

  if( libcthreads_read_write_lock_release_for_write(