/*

 * The compressed blocks stream functions

 *

 * Copyright (C) 2014-2024, 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 "libagdb_compressed_blocks_stream.h"

#include "libagdb_compressed_blocks_stream_data_handle.h"

#include "libagdb_libcerror.h"

#include "libagdb_libfcache.h"

#include "libagdb_libfdata.h"

/* Creates a compressed block stream

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

 * Returns 1 if successful or -1 on error

 */

int libagdb_compressed_blocks_stream_initialize(

     libfdata_stream_t **compressed_blocks_stream,

     libfdata_list_t *compressed_blocks_list,

     libfcache_cache_t *compressed_blocks_cache,

     libcerror_error_t **error )

{

  libagdb_compressed_blocks_stream_data_handle_t *data_handle = NULL;

  static char *function                                       = "libagdb_compressed_blocks_stream_initialize";

  off64_t segment_offset                                      = 0;

  size64_t segment_size                                       = 0;

  int element_index                                           = 0;

  int number_of_elements                                      = 0;

  int segment_index                                           = 0;

  if( compressed_blocks_stream == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid compressed block stream.",

     function );

    return( -1 );

  }

  if( compressed_blocks_list == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid compressed blocks list.",

     function );

    return( -1 );

  }

  if( libagdb_compressed_blocks_stream_data_handle_initialize(

       &data_handle,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

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

     function );

    goto on_error;

  }

  if( data_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: missing data handle.",

     function );

    goto on_error;

  }

  data_handle->compressed_blocks_list  = compressed_blocks_list;

  data_handle->compressed_blocks_cache = compressed_blocks_cache;

  if( libfdata_stream_initialize(

       compressed_blocks_stream,

       (intptr_t *) data_handle,

       (int (*)(intptr_t **, libcerror_error_t **)) &libagdb_compressed_blocks_stream_data_handle_free,

       NULL,

       NULL,

       (ssize_t (*)(intptr_t *, intptr_t *, int, int, uint8_t *, size_t, uint32_t, uint8_t, libcerror_error_t **)) &libagdb_compressed_blocks_stream_data_handle_read_segment_data,

       NULL,

       (off64_t (*)(intptr_t *, intptr_t *, int, int, off64_t, libcerror_error_t **)) &libagdb_compressed_blocks_stream_data_handle_seek_segment_offset,

       LIBFDATA_DATA_HANDLE_FLAG_MANAGED,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to create stream.",

     function );

    goto on_error;

  }

  if( libfdata_list_get_number_of_elements(

       compressed_blocks_list,

       &number_of_elements,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_GET_FAILED,

     "%s: unable to retrieve number of compressed blocks list elements.",

     function );

    data_handle = NULL;

    goto on_error;

  }

  for( element_index = 0;

       element_index < number_of_elements;

       element_index++ )

  {

    if( libfdata_list_get_mapped_size_by_index(

         compressed_blocks_list,

         element_index,

         &segment_size,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_GET_FAILED,

       "%s: unable to retrieve compressed blocks list element: %d mapped size.",

       function,

       element_index );

      data_handle = NULL;

      goto on_error;

    }

    if( libfdata_stream_append_segment(

         *compressed_blocks_stream,

         &segment_index,

         0,

         segment_offset,

         segment_size,

         0,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_APPEND_FAILED,

       "%s: unable to append compressed blocks stream segment: %d.",

       function,

       element_index );

      data_handle = NULL;

      goto on_error;

    }

    segment_offset += segment_size;

  }

  return( 1 );

on_error:

  if( *compressed_blocks_stream != NULL )

  {

    libfdata_stream_free(

     compressed_blocks_stream,

     NULL );

  }

  if( data_handle != NULL )

  {

    libagdb_compressed_blocks_stream_data_handle_free(

     &data_handle,

     NULL );

  }

  return( -1 );

}