/*

 * The data block vector functions

 *

 * Copyright (C) 2018-2026, 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 "libfsapfs_file_extent.h"

#include "libfsapfs_file_system_data_handle.h"

#include "libfsapfs_io_handle.h"

#include "libfsapfs_libcdata.h"

#include "libfsapfs_libcerror.h"

#include "libfsapfs_libfdata.h"

/* Creates a data block vector

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

 * Returns 1 if successful or -1 on error

 */

int libfsapfs_data_block_vector_initialize(

     libfdata_vector_t **vector,

     libfsapfs_io_handle_t *io_handle,

     libfsapfs_file_system_data_handle_t *data_handle,

     libcdata_array_t *file_extents,

     uint8_t is_sparse,

     libcerror_error_t **error )

{

  libfdata_vector_t *safe_vector       = NULL;

  libfsapfs_file_extent_t *file_extent = NULL;

  static char *function                = "libfsapfs_data_block_vector_initialize";

  uint64_t logical_offset              = 0;

  uint32_t segment_flags               = 0;

  int extent_index                     = 0;

  int number_of_extents                = 0;

  int segment_index                    = 0;

  if( vector == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid vector.",

     function );

    return( -1 );

  }

  if( *vector != NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

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

     function );

    return( -1 );

  }

  if( io_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid IO handle.",

     function );

    return( -1 );

  }

  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( libfdata_vector_initialize(

       &safe_vector,

       (size64_t) io_handle->block_size,

       (intptr_t *) data_handle,

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

       NULL,

       (int (*)(intptr_t *, intptr_t *, libfdata_vector_t *, libfdata_cache_t *, int, int, off64_t, size64_t, uint32_t, uint8_t, libcerror_error_t **)) &libfsapfs_file_system_data_handle_read_data_block,

       NULL,

       LIBFDATA_DATA_HANDLE_FLAG_NON_MANAGED,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to create data block vector.",

     function );

    goto on_error;

  }

  if( libcdata_array_get_number_of_entries(

       file_extents,

       &number_of_extents,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_GET_FAILED,

     "%s: unable to retrieve number of entries from array.",

     function );

    goto on_error;

  }

  for( extent_index = 0;

       extent_index < number_of_extents;

       extent_index++ )

  {

    if( libcdata_array_get_entry_by_index(

         file_extents,

         extent_index,

         (intptr_t **) &file_extent,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_GET_FAILED,

       "%s: unable to retrieve file extent: %d.",

       function,

       extent_index );

      goto on_error;

    }

    if( file_extent == NULL )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

       "%s: missing file extent: %d.",

       function,

       extent_index );

      goto on_error;

    }

    if( ( is_sparse == 0 )

     || ( file_extent->physical_block_number != 0 ) )

    {

      if( file_extent->logical_offset != logical_offset )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

         LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,

         "%s: invalid file extent: %d - logical offset value out of bounds.",

         function,

         extent_index );

        goto on_error;

      }

    }

    segment_flags = 0;

    if( ( is_sparse != 0 )

     && ( file_extent->physical_block_number == 0 ) )

    {

      segment_flags = LIBFDATA_RANGE_FLAG_IS_SPARSE;

    }

    if( libfdata_vector_append_segment(

         safe_vector,

         &segment_index,

         extent_index,

         file_extent->physical_block_number * io_handle->block_size,

         file_extent->data_size,

         segment_flags,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_APPEND_FAILED,

       "%s: unable to append extent: %d as data block vector segment.",

       function,

       extent_index );

      goto on_error;

    }

    logical_offset += file_extent->data_size;

  }

  *vector = safe_vector;

  return( 1 );

on_error:

  if( safe_vector != NULL )

  {

    libfdata_vector_free(

     &safe_vector,

     NULL );

  }

  return( -1 );

}