/*

 * Cluster block functions

 *

 * Copyright (C) 2010-2024, 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 <byte_stream.h>

#include <memory.h>

#include <types.h>

#include "libqcow_cluster_block.h"

#include "libqcow_definitions.h"

#include "libqcow_libbfio.h"

#include "libqcow_libcerror.h"

#include "libqcow_libcnotify.h"

/* Creates a cluster block

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

 * Returns 1 if successful or -1 on error

 */

int libqcow_cluster_block_initialize(

     libqcow_cluster_block_t **cluster_block,

     size_t data_size,

     libcerror_error_t **error )

{

  static char *function = "libqcow_cluster_block_initialize";

  if( cluster_block == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid cluster block.",

     function );

    return( -1 );

  }

  if( *cluster_block != NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

     "%s: invalid cluster block value already set.",

     function );

    return( -1 );

  }

  if( ( data_size == 0 )

   || ( data_size > (size_t) MEMORY_MAXIMUM_ALLOCATION_SIZE ) )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,

     "%s: invalid data size value out of bounds.",

     function );

    return( -1 );

  }

  *cluster_block = memory_allocate_structure(

                    libqcow_cluster_block_t );

  if( *cluster_block == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,

     "%s: unable to create cluster block.",

     function );

    goto on_error;

  }

  if( memory_set(

       *cluster_block,

       0,

       sizeof( libqcow_cluster_block_t ) ) == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_SET_FAILED,

     "%s: unable to clear cluster block.",

     function );

    memory_free(

     *cluster_block );

    *cluster_block = NULL;

    return( -1 );

  }

  ( *cluster_block )->data = (uint8_t *) memory_allocate(

                                          sizeof( uint8_t ) * data_size );

  if( ( *cluster_block )->data == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,

     "%s: unable to create data.",

     function );

    goto on_error;

  }

  ( *cluster_block )->data_size = data_size;

  return( 1 );

on_error:

  if( *cluster_block != NULL )

  {

    memory_free(

     *cluster_block );

    *cluster_block = NULL;

  }

  return( -1 );

}

/* Frees a cluster block

 * Returns 1 if successful or -1 on error

 */

int libqcow_cluster_block_free(

     libqcow_cluster_block_t **cluster_block,

     libcerror_error_t **error )

{

  static char *function = "libqcow_cluster_block_free";

  int result            = 1;

  if( cluster_block == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid cluster block.",

     function );

    return( -1 );

  }

  if( *cluster_block != NULL )

  {

    if( ( *cluster_block )->compressed_data != NULL )

    {

      memory_free(

       ( *cluster_block )->compressed_data );

    }

    if( ( *cluster_block )->encrypted_data != NULL )

    {

      memory_free(

       ( *cluster_block )->encrypted_data );

    }

    if( ( *cluster_block )->data != NULL )

    {

      if( memory_set(

           ( *cluster_block )->data,

           0,

           ( *cluster_block )->data_size ) == NULL )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_MEMORY,

         LIBCERROR_MEMORY_ERROR_SET_FAILED,

         "%s: unable to clear data.",

         function );

        result = -1;

      }

      memory_free(

       ( *cluster_block )->data );

    }

    memory_free(

     *cluster_block );

    *cluster_block = NULL;

  }

  return( result );

}

/* Reads cluster block

 * Returns 1 if successful or -1 on error

 */

int libqcow_cluster_block_read(

     libqcow_cluster_block_t *cluster_block,

     libbfio_handle_t *file_io_handle,

     off64_t cluster_block_offset,

     libcerror_error_t **error )

{

  static char *function = "libqcow_cluster_block_read";

  ssize_t read_count    = 0;

  if( cluster_block == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid cluster block.",

     function );

    return( -1 );

  }

  if( cluster_block->data == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: invalid cluster block - missing data.",

     function );

    return( -1 );

  }

#if defined( HAVE_DEBUG_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

    libcnotify_printf(

     "%s: reading cluster block at offset: %" PRIi64 " (0x%08" PRIx64 ")\n",

     function,

     cluster_block_offset,

     cluster_block_offset );

  }

#endif

  read_count = libbfio_handle_read_buffer_at_offset(

          file_io_handle,

          cluster_block->data,

          cluster_block->data_size,

          cluster_block_offset,

          error );

  if( read_count != (ssize_t) cluster_block->data_size )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_IO,

     LIBCERROR_IO_ERROR_READ_FAILED,

     "%s: unable to read cluster block at offset: %" PRIi64 " (0x%08" PRIx64 ").",

     function,

     cluster_block_offset,

     cluster_block_offset );

    return( -1 );

  }

#if defined( HAVE_DEBUG_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

    libcnotify_printf(

     "%s: cluster block:\n",

     function );

    libcnotify_print_data(

     cluster_block->data,

     cluster_block->data_size,

     LIBCNOTIFY_PRINT_DATA_FLAG_GROUP_DATA );

  }

#endif

  return( 1 );

}