/*

 * Low level reading functions

 *

 * Copyright (C) 2006-2024, 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 <types.h>

#include "libewf_chunk_data.h"

#include "libewf_definitions.h"

#include "libewf_io_handle.h"

#include "libewf_libbfio.h"

#include "libewf_libcdata.h"

#include "libewf_libcerror.h"

#include "libewf_libcnotify.h"

#include "libewf_libfcache.h"

#include "libewf_libfdata.h"

#include "libewf_media_values.h"

#include "libewf_read_io_handle.h"

#include "libewf_segment_file.h"

/* Creates a read IO handle

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

 * Returns 1 if successful or -1 on error

 */

int libewf_read_io_handle_initialize(

     libewf_read_io_handle_t **read_io_handle,

     libcerror_error_t **error )

{

  static char *function = "libewf_read_io_handle_initialize";

  if( read_io_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid read IO handle.",

     function );

    return( -1 );

  }

  if( *read_io_handle != NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

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

     function );

    return( -1 );

  }

  *read_io_handle = memory_allocate_structure(

                     libewf_read_io_handle_t );

  if( *read_io_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,

     "%s: unable to create read IO handle.",

     function );

    goto on_error;

  }

  if( memory_set(

       *read_io_handle,

       0,

       sizeof( libewf_read_io_handle_t ) ) == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_SET_FAILED,

     "%s: unable to clear read IO handle.",

     function );

    goto on_error;

  }

  return( 1 );

on_error:

  if( *read_io_handle != NULL )

  {

    memory_free(

     *read_io_handle );

    *read_io_handle = NULL;

  }

  return( -1 );

}

/* Frees a read IO handle

 * Returns 1 if successful or -1 on error

 */

int libewf_read_io_handle_free(

     libewf_read_io_handle_t **read_io_handle,

     libcerror_error_t **error )

{

  static char *function = "libewf_read_io_handle_free";

  int result            = 1;

  if( read_io_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid read IO handle.",

     function );

    return( -1 );

  }

  if( *read_io_handle != NULL )

  {

    if( ( *read_io_handle )->case_data != NULL )

    {

      memory_free(

       ( *read_io_handle )->case_data );

    }

    if( ( *read_io_handle )->device_information != NULL )

    {

      memory_free(

       ( *read_io_handle )->device_information );

    }

    memory_free(

     *read_io_handle );

    *read_io_handle = NULL;

  }

  return( result );

}

/* Clones the read IO handle

 * Returns 1 if successful or -1 on error

 */

int libewf_read_io_handle_clone(

     libewf_read_io_handle_t **destination_read_io_handle,

     libewf_read_io_handle_t *source_read_io_handle,

     libcerror_error_t **error )

{

  static char *function = "libewf_read_io_handle_clone";

  if( destination_read_io_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid destination read IO handle.",

     function );

    return( -1 );

  }

  if( *destination_read_io_handle != NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

     "%s: invalid destination read IO handle value already set.",

     function );

    return( -1 );

  }

  if( source_read_io_handle == NULL )

  {

    *destination_read_io_handle = NULL;

    return( 1 );

  }

  *destination_read_io_handle = memory_allocate_structure(

                                 libewf_read_io_handle_t );

  if( *destination_read_io_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,

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

     function );

    goto on_error;

  }

  if( memory_set(

       *destination_read_io_handle,

       0,

       sizeof( libewf_read_io_handle_t ) ) == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_SET_FAILED,

     "%s: unable to clear source to destination read IO handle.",

     function );

    goto on_error;

  }

  return( 1 );

on_error:

  if( *destination_read_io_handle != NULL )

  {

    memory_free(

     *destination_read_io_handle );

    *destination_read_io_handle = NULL;

  }

  return( -1 );

}