/*

 * The compressed data handle functions

 *

 * Copyright (C) 2018-2024, 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 "libfsapfs_compressed_data_handle.h"

#include "libfsapfs_compression.h"

#include "libfsapfs_definitions.h"

#include "libfsapfs_libbfio.h"

#include "libfsapfs_libcerror.h"

#include "libfsapfs_libcnotify.h"

#include "libfsapfs_unused.h"

#define LIBFSAPFS_COMPRESSED_DATA_HANDLE_BLOCK_SIZE 65536

/* Creates compressed data handle

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

 * Returns 1 if successful or -1 on error

 */

int libfsapfs_compressed_data_handle_initialize(

     libfsapfs_compressed_data_handle_t **data_handle,

     libfdata_stream_t *compressed_data_stream,

     size64_t uncompressed_data_size,

     int compression_method,

     libcerror_error_t **error )

{

  static char *function = "libfsapfs_compressed_data_handle_initialize";

  if( data_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid data handle.",

     function );

    return( -1 );

  }

  if( *data_handle != NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

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

     function );

    return( -1 );

  }

  if( compressed_data_stream == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid compressed data stream.",

     function );

    return( -1 );

  }

  if( ( compression_method != LIBFSAPFS_COMPRESSION_METHOD_DEFLATE )

   && ( compression_method != LIBFSAPFS_COMPRESSION_METHOD_LZVN )

   && ( compression_method != LIBFSAPFS_COMPRESSION_METHOD_UNKNOWN5 ) )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE,

     "%s: unsupported compression method.",

     function );

    return( -1 );

  }

  *data_handle = memory_allocate_structure(

                  libfsapfs_compressed_data_handle_t );

  if( *data_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,

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

     function );

    goto on_error;

  }

  if( memory_set(

       *data_handle,

       0,

       sizeof( libfsapfs_compressed_data_handle_t ) ) == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_SET_FAILED,

     "%s: unable to clear data handle.",

     function );

    memory_free(

     *data_handle );

    *data_handle = NULL;

    return( -1 );

  }

  ( *data_handle )->compressed_segment_data = (uint8_t *) memory_allocate(

                                                           sizeof( uint8_t ) * ( LIBFSAPFS_COMPRESSED_DATA_HANDLE_BLOCK_SIZE + 1 ) );

  if( ( *data_handle )->compressed_segment_data == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,

     "%s: unable to create compressed segment data.",

     function );

    goto on_error;

  }

  if( compression_method != LIBFSAPFS_COMPRESSION_METHOD_UNKNOWN5 )

  {

    ( *data_handle )->segment_data = (uint8_t *) memory_allocate(

                                                  sizeof( uint8_t ) * LIBFSAPFS_COMPRESSED_DATA_HANDLE_BLOCK_SIZE );

    if( ( *data_handle )->segment_data == NULL )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_MEMORY,

       LIBCERROR_MEMORY_ERROR_INSUFFICIENT,

       "%s: unable to create segment data.",

       function );

      goto on_error;

    }

  }

  ( *data_handle )->compressed_data_stream         = compressed_data_stream;

  ( *data_handle )->current_compressed_block_index = (uint32_t) -1;

  ( *data_handle )->uncompressed_data_size         = uncompressed_data_size;

  ( *data_handle )->compression_method             = compression_method;

  return( 1 );

on_error:

  if( *data_handle != NULL )

  {

    if( ( *data_handle )->segment_data != NULL )

    {

      memory_free(

       ( *data_handle )->segment_data );

    }

    if( ( *data_handle )->compressed_segment_data != NULL )

    {

      memory_free(

       ( *data_handle )->compressed_segment_data );

    }

    memory_free(

     *data_handle );

    *data_handle = NULL;

  }

  return( -1 );

}

/* Frees data handle

 * Returns 1 if successful or -1 on error

 */

int libfsapfs_compressed_data_handle_free(

     libfsapfs_compressed_data_handle_t **data_handle,

     libcerror_error_t **error )

{

  static char *function = "libfsapfs_compressed_data_handle_free";

  if( data_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid data handle.",

     function );

    return( -1 );

  }

  if( *data_handle != NULL )

  {

    if( ( *data_handle )->segment_data != NULL )

    {

      memory_free(

       ( *data_handle )->segment_data );

    }

    if( ( *data_handle )->compressed_segment_data != NULL )

    {

      memory_free(

       ( *data_handle )->compressed_segment_data );

    }

    if( ( *data_handle )->compressed_block_offsets != NULL )

    {

      memory_free(

       ( *data_handle )->compressed_block_offsets );

    }

    memory_free(

     *data_handle );

    *data_handle = NULL;

  }

  return( 1 );

}

/* Determines the compressed block offsets

 * Returns 1 if successful or -1 on error

 */

int libfsapfs_compressed_data_handle_get_compressed_block_offsets(

     libfsapfs_compressed_data_handle_t *data_handle,

     libbfio_handle_t *file_io_handle,

     libcerror_error_t **error )

{

  static char *function                     = "libfsapfs_compressed_data_handle_get_compressed_block_offsets";

  size64_t compressed_data_size             = 0;

  size_t compressed_block_descriptor_size   = 0;

  size_t read_size                          = 0;

  size_t segment_data_offset                = 0;

  ssize_t read_count                        = 0;

  uint32_t compressed_block_index           = 0;

  uint32_t compressed_block_offset          = 0;

  uint32_t compressed_descriptors_offset    = 0;

  uint32_t compressed_footer_offset         = 0;

  uint32_t compressed_footer_size           = 0;

  uint32_t previous_compressed_block_offset = 0;

  int compare_result                        = 0;

#if defined( HAVE_DEBUG_OUTPUT )

  uint32_t value_32bit                      = 0;

#endif

  if( data_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid data handle.",

     function );

    return( -1 );

  }

  if( data_handle->compressed_block_offsets != NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

     "%s: invalid data handle - compressed block offsets value already set.",

     function );

    return( -1 );

  }

  if( libfdata_stream_get_size(

       data_handle->compressed_data_stream,

       &compressed_data_size,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_GET_FAILED,

     "%s: unable to retrieve compressed data size.",

     function );

    goto on_error;

  }

  read_count = libfdata_stream_read_buffer_at_offset(

                data_handle->compressed_data_stream,

                (intptr_t *) file_io_handle,

                data_handle->compressed_segment_data,

                4,

                0,

                0,

                error );

  if( read_count != 4 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_IO,

     LIBCERROR_IO_ERROR_READ_FAILED,

     "%s: unable to read buffer at offset: 0 (0x00000000) from data stream.",

     function );

    goto on_error;

  }

  compare_result = memory_compare(

                    data_handle->compressed_segment_data,

                    "fpmc",

                    4 );

  if( compare_result == 0 )

  {

    if( compressed_data_size > (size64_t) ( LIBFSAPFS_COMPRESSED_DATA_HANDLE_BLOCK_SIZE + 1 ) )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

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

       function );

      goto on_error;

    }

    data_handle->number_of_compressed_blocks = 1;

  }

  else if( data_handle->compression_method == LIBFSAPFS_COMPRESSION_METHOD_DEFLATE )

  {

    byte_stream_copy_to_uint32_big_endian(

     data_handle->compressed_segment_data,

     compressed_descriptors_offset );

    if( compressed_descriptors_offset != 0x00000100UL )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

       "%s: invalid compressed descriptors offset value out of bounds.",

       function );

      goto on_error;

    }

    read_size = (size_t) compressed_descriptors_offset + 16 - 4;

    read_count = libfdata_stream_read_buffer_at_offset(

                  data_handle->compressed_data_stream,

                  (intptr_t *) file_io_handle,

                  &( data_handle->compressed_segment_data[ 4 ] ),

                  read_size,

                  4,

                  0,

                  error );

    if( read_count != (ssize_t) read_size )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_IO,

       LIBCERROR_IO_ERROR_READ_FAILED,

       "%s: unable to read compressed header data at offset: 4 (0x00000004) from data stream.",

       function );

      goto on_error;

    }

#if defined( HAVE_DEBUG_OUTPUT )

    if( libcnotify_verbose != 0 )

    {

      libcnotify_printf(

       "%s: compressed header data:\n",

       function );

      libcnotify_print_data(

       data_handle->compressed_segment_data,

       read_size - 4,

       LIBCNOTIFY_PRINT_DATA_FLAG_GROUP_DATA );

    }

#endif

#if defined( HAVE_DEBUG_OUTPUT )

    if( libcnotify_verbose != 0 )

    {

      libcnotify_printf(

       "%s: compressed descriptors offset\t: 0x%08" PRIx32 "\n",

       function,

       compressed_descriptors_offset );

      byte_stream_copy_to_uint32_big_endian(

       &( data_handle->compressed_segment_data[ 4 ] ),

       compressed_footer_offset );

      libcnotify_printf(

       "%s: compressed footer offset\t\t: 0x%08" PRIx32 "\n",

       function,

       compressed_footer_offset );

      byte_stream_copy_to_uint32_big_endian(

       &( data_handle->compressed_segment_data[ 8 ] ),

       value_32bit );

      libcnotify_printf(

       "%s: compressed data size\t\t: %" PRIu32 "\n",

       function,

       value_32bit );

      byte_stream_copy_to_uint32_big_endian(

       &( data_handle->compressed_segment_data[ 12 ] ),

       compressed_footer_size );

      libcnotify_printf(

       "%s: compressed footer size\t\t: %" PRIu32 "\n",

       function,

       compressed_footer_size );

      libcnotify_printf(

       "%s: unknown1:\n",

       function );

      libcnotify_print_data(

       &( data_handle->compressed_segment_data[ 16 ] ),

       240,

       LIBCNOTIFY_PRINT_DATA_FLAG_GROUP_DATA );

      byte_stream_copy_to_uint32_little_endian(

       &( data_handle->compressed_segment_data[ 256 ] ),

       value_32bit );

      libcnotify_printf(

       "%s: compressed data size\t\t: %" PRIu32 "\n",

       function,

       value_32bit );

    }

#endif /* defined( HAVE_DEBUG_OUTPUT ) */

    byte_stream_copy_to_uint32_little_endian(

     &( data_handle->compressed_segment_data[ 260 ] ),

     data_handle->number_of_compressed_blocks );

    if( data_handle->number_of_compressed_blocks > ( (uint32_t) UINT32_MAX / 8 ) )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

       "%s: invalid number of compressed blocks value out of bounds.",

       function );

      goto on_error;

    }

    segment_data_offset = 264;

    byte_stream_copy_to_uint32_little_endian(

     &( data_handle->compressed_segment_data[ segment_data_offset ] ),

     compressed_block_offset );

    segment_data_offset += 4;

    compressed_descriptors_offset   += 4;

    compressed_block_descriptor_size = 8;

  }

  else if( data_handle->compression_method == LIBFSAPFS_COMPRESSION_METHOD_LZVN )

  {

    segment_data_offset = 0;

    byte_stream_copy_to_uint32_little_endian(

     &( data_handle->compressed_segment_data[ segment_data_offset ] ),

     compressed_block_offset );

    segment_data_offset += 4;

    compressed_block_descriptor_size = 4;

    if( ( compressed_block_offset <= 0x00000004UL )

     || ( compressed_block_offset >= ( LIBFSAPFS_COMPRESSED_DATA_HANDLE_BLOCK_SIZE + 1 ) ) )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

       "%s: invalid number of compressed blocks value out of bounds.",

       function );

      goto on_error;

    }

    data_handle->number_of_compressed_blocks = compressed_block_offset / 4;

  }

#if defined( HAVE_DEBUG_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

    libcnotify_printf(

     "%s: number of compressed blocks\t: %" PRIu32 "\n",

     function,

     data_handle->number_of_compressed_blocks );

  }

#endif

  if( (size_t) data_handle->number_of_compressed_blocks > ( (size_t) ( MEMORY_MAXIMUM_ALLOCATION_SIZE / 4 ) - 1 ) )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

     "%s: invalid number of compressed blocks value exceeds maximum allocation size.",

     function );

    goto on_error;

  }

  data_handle->compressed_block_offsets = (uint32_t *) memory_allocate(

                                                        sizeof( uint32_t ) * ( data_handle->number_of_compressed_blocks + 1 ) );

  if( data_handle->compressed_block_offsets == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,

     "%s: unable to create compressed block offsets.",

     function );

    goto on_error;

  }

  if( compare_result == 0 )

  {

    data_handle->compressed_block_offsets[ compressed_block_index++ ] = 16;

    previous_compressed_block_offset                                  = 16;

  }

  else

  {

    read_size = ( (size_t) data_handle->number_of_compressed_blocks - 1 ) * compressed_block_descriptor_size;

    read_count = libfdata_stream_read_buffer_at_offset(

                  data_handle->compressed_data_stream,

                  (intptr_t *) file_io_handle,

                  &( data_handle->compressed_segment_data[ segment_data_offset ] ),

                  read_size,

                  segment_data_offset,

                  0,

                  error );

    if( read_count != (ssize_t) read_size )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_IO,

       LIBCERROR_IO_ERROR_READ_FAILED,

       "%s: unable to read compressed block descriptors data at offset: %" PRIzd " (0x%08" PRIzx ") from data stream.",

       function,

       segment_data_offset,

       segment_data_offset );

      goto on_error;

    }

#if defined( HAVE_DEBUG_OUTPUT )

    if( libcnotify_verbose != 0 )

    {

      libcnotify_printf(

       "%s: compressed block descriptors data:\n",

       function );

      libcnotify_print_data(

       &( data_handle->compressed_segment_data[ segment_data_offset - compressed_block_descriptor_size ] ),

       read_size + compressed_block_descriptor_size,

       LIBCNOTIFY_PRINT_DATA_FLAG_GROUP_DATA );

    }

#endif

#if defined( HAVE_DEBUG_OUTPUT )

    if( libcnotify_verbose != 0 )

    {

      libcnotify_printf(

       "%s: compressed block: % 2" PRIu32 " offset\t: 0x%08" PRIx32 " (0x%08" PRIx32 ")\n",

       function,

       compressed_block_index,

       compressed_block_offset,

       compressed_block_offset + compressed_descriptors_offset );

    }

#endif

    if( ( compressed_block_offset <= compressed_block_descriptor_size )

     || ( compressed_block_offset >= ( LIBFSAPFS_COMPRESSED_DATA_HANDLE_BLOCK_SIZE + 1 ) ) )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

       "%s: invalid compressed block offset: %" PRIu32 " (0x%08" PRIx32 ") value out of bounds.",

       function,

       compressed_block_offset,

       compressed_block_offset );

      goto on_error;

    }

    compressed_block_offset += compressed_descriptors_offset;

    data_handle->compressed_block_offsets[ 0 ] = compressed_block_offset;

    previous_compressed_block_offset           = compressed_block_offset;

    if( data_handle->compression_method == LIBFSAPFS_COMPRESSION_METHOD_DEFLATE )

    {

#if defined( HAVE_DEBUG_OUTPUT )

      if( libcnotify_verbose != 0 )

      {

        byte_stream_copy_to_uint32_little_endian(

         &( data_handle->compressed_segment_data[ segment_data_offset ] ),

         value_32bit );

        libcnotify_printf(

         "%s: compressed block: % 2" PRIu32 " size\t: %" PRIu32 "\n",

         function,

         compressed_block_index,

         value_32bit );

      }

#endif

      segment_data_offset += 4;

    }

    for( compressed_block_index = 1;

         compressed_block_index < data_handle->number_of_compressed_blocks;

         compressed_block_index++ )

    {

      byte_stream_copy_to_uint32_little_endian(

       &( data_handle->compressed_segment_data[ segment_data_offset ] ),

       compressed_block_offset );

#if defined( HAVE_DEBUG_OUTPUT )

      if( libcnotify_verbose != 0 )

      {

        libcnotify_printf(

         "%s: compressed block: % 2" PRIu32 " offset\t: 0x%08" PRIx32 " (0x%08" PRIx32 ")\n",

         function,

         compressed_block_index,

         compressed_block_offset,

         compressed_block_offset + compressed_descriptors_offset );

      }

#endif

      segment_data_offset += 4;

      compressed_block_offset += compressed_descriptors_offset;

      if( ( previous_compressed_block_offset > compressed_block_offset )

       || ( ( compressed_block_offset - previous_compressed_block_offset ) > (uint32_t) ( LIBFSAPFS_COMPRESSED_DATA_HANDLE_BLOCK_SIZE + 1 ) ) )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

         "%s: invalid compressed block offset: %" PRIu32 " (0x%08" PRIx32 ") value out of bounds.",

         function,

         compressed_block_offset,

         compressed_block_offset );

        goto on_error;

      }

      data_handle->compressed_block_offsets[ compressed_block_index ] = compressed_block_offset;

      previous_compressed_block_offset                                = compressed_block_offset;

      if( data_handle->compression_method == LIBFSAPFS_COMPRESSION_METHOD_DEFLATE )

      {

#if defined( HAVE_DEBUG_OUTPUT )

        if( libcnotify_verbose != 0 )

        {

          byte_stream_copy_to_uint32_little_endian(

           &( data_handle->compressed_segment_data[ segment_data_offset ] ),

           value_32bit );

          libcnotify_printf(

           "%s: compressed block: % 2" PRIu32 " size\t: %" PRIu32 "\n",

           function,

           compressed_block_index,

           value_32bit );

        }

#endif

        segment_data_offset += 4;

      }

    }

  }

  if( ( previous_compressed_block_offset > compressed_data_size )

   || ( ( compressed_data_size - previous_compressed_block_offset ) > (uint32_t) ( LIBFSAPFS_COMPRESSED_DATA_HANDLE_BLOCK_SIZE + 1 ) ) )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

     "%s: invalid compressed block offset: %" PRIu32 " (0x%08" PRIx32 ") value out of bounds.",

     function,

     previous_compressed_block_offset,

     previous_compressed_block_offset );

    goto on_error;

  }

  data_handle->compressed_block_offsets[ compressed_block_index ] = (uint32_t) compressed_data_size;

#if defined( HAVE_DEBUG_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

    libcnotify_printf(

     "\n" );

  }

#endif

  if( data_handle->compression_method == LIBFSAPFS_COMPRESSION_METHOD_DEFLATE )

  {

    if( compressed_footer_size > (uint32_t) ( LIBFSAPFS_COMPRESSED_DATA_HANDLE_BLOCK_SIZE + 1 ) )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

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

       function );

      goto on_error;

    }

    read_count = libfdata_stream_read_buffer_at_offset(

                  data_handle->compressed_data_stream,

                  (intptr_t *) file_io_handle,

                  data_handle->compressed_segment_data,

                  (size_t) compressed_footer_size,

                  (off64_t) compressed_footer_offset,

                  0,

                  error );

    if( read_count != (ssize_t) compressed_footer_size )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_IO,

       LIBCERROR_IO_ERROR_READ_FAILED,

       "%s: unable to read compressed footer data at offset: %" PRIu32 " (0x08%" PRIx32 ") from data stream.",

       function,

       compressed_footer_offset,

       compressed_footer_offset );

      goto on_error;

    }

#if defined( HAVE_DEBUG_OUTPUT )

    if( libcnotify_verbose != 0 )

    {

      libcnotify_printf(

       "%s: compressed footer data:\n",

       function );

      libcnotify_print_data(

       data_handle->compressed_segment_data,

       (size_t) compressed_footer_size,

       LIBCNOTIFY_PRINT_DATA_FLAG_GROUP_DATA );

    }

#endif

  }

  else if( data_handle->compression_method == LIBFSAPFS_COMPRESSION_METHOD_UNKNOWN5 )

  {

    if( compressed_data_size > (size64_t) SSIZE_MAX )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

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

       function );

      goto on_error;

    }

    read_size = (size_t) compressed_data_size - 16;

    read_count = libfdata_stream_read_buffer_at_offset(

                  data_handle->compressed_data_stream,

                  (intptr_t *) file_io_handle,

                  data_handle->compressed_segment_data,

                  read_size,

                  16,

                  0,

                  error );

    if( read_count != (ssize_t) read_size )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_IO,

       LIBCERROR_IO_ERROR_READ_FAILED,

       "%s: unable to read unknown data at offset: 16 (0x00000010) from data stream.",

       function );

      goto on_error;

    }

#if defined( HAVE_DEBUG_OUTPUT )

    if( libcnotify_verbose != 0 )

    {

      libcnotify_printf(

       "%s: unknown data:\n",

       function );

      libcnotify_print_data(

       data_handle->compressed_segment_data,

       read_size,

       LIBCNOTIFY_PRINT_DATA_FLAG_GROUP_DATA );

    }

#endif

  }

  return( 1 );

on_error:

  if( data_handle->compressed_block_offsets != NULL )

  {

    memory_free(

     data_handle->compressed_block_offsets );

    data_handle->compressed_block_offsets = NULL;

  }

  return( -1 );

}

/* Reads data from the current offset into a compressed

 * Callback for the data stream

 * Returns the number of bytes read or -1 on error

 */

ssize_t libfsapfs_compressed_data_handle_read_segment_data(

         libfsapfs_compressed_data_handle_t *data_handle,

         intptr_t *file_io_handle,

         int segment_index,

         int segment_file_index LIBFSAPFS_ATTRIBUTE_UNUSED,

         uint8_t *segment_data,

         size_t segment_data_size,

         uint32_t segment_flags LIBFSAPFS_ATTRIBUTE_UNUSED,

         uint8_t read_flags LIBFSAPFS_ATTRIBUTE_UNUSED,

         libcerror_error_t **error )

{

  static char *function             = "libfsapfs_compressed_data_handle_read_segment_data";

  size_t data_offset                = 0;

  size_t read_size                  = 0;

  size_t segment_data_offset        = 0;

  ssize_t read_count                = 0;

  off64_t data_stream_offset        = 0;

  off64_t uncompressed_block_offset = 0;

  uint32_t compressed_block_index   = 0;

  LIBFSAPFS_UNREFERENCED_PARAMETER( file_io_handle )

  LIBFSAPFS_UNREFERENCED_PARAMETER( segment_file_index )

  LIBFSAPFS_UNREFERENCED_PARAMETER( segment_flags )

  LIBFSAPFS_UNREFERENCED_PARAMETER( read_flags )

  if( data_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid data handle.",

     function );

    return( -1 );

  }

  if( segment_index != 0 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,

     "%s: invalid segment index value out of bounds.",

     function );

    return( -1 );

  }

  if( segment_data == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid segment data.",

     function );

    return( -1 );

  }

  if( segment_data_size > (size_t) SSIZE_MAX )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,

     "%s: invalid segment data size value exceeds maximum.",

     function );

    return( -1 );

  }

  if( data_handle->compressed_block_offsets == NULL )

  {

    if( libfsapfs_compressed_data_handle_get_compressed_block_offsets(

         data_handle,

         (libbfio_handle_t *) file_io_handle,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_GET_FAILED,

       "%s: unable to determine compressed block offsets.",

       function );

      return( -1 );

    }

  }

  if( (size64_t) data_handle->current_segment_offset >= data_handle->uncompressed_data_size )

  {

    return( 0 );

  }

  if( data_handle->compression_method == LIBFSAPFS_COMPRESSION_METHOD_UNKNOWN5 )

  {

    if( (size64_t) segment_data_size > ( data_handle->uncompressed_data_size - data_handle->current_segment_offset ) )

    {

      read_size = (size_t) ( data_handle->uncompressed_data_size - data_handle->current_segment_offset );

    }

    else

    {

      read_size = segment_data_size;

    }

    if( memory_set(

         segment_data,

         0,

         read_size ) == NULL )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_MEMORY,

       LIBCERROR_MEMORY_ERROR_SET_FAILED,

       "%s: unable to clear segment data.",

       function );

      return( -1 );