/*

 * Case data section functions

 *

 * Copyright (C) 2006-2023, 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 <memory.h>

#include <types.h>

#include "libewf_case_data.h"

#include "libewf_case_data_section.h"

#include "libewf_libbfio.h"

#include "libewf_libcerror.h"

#include "libewf_libfvalue.h"

#include "libewf_media_values.h"

#include "libewf_read_io_handle.h"

#include "libewf_section.h"

#include "libewf_section_descriptor.h"

/* Reads a case data section

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

 */

ssize_t libewf_case_data_section_read_file_io_pool(

         libewf_section_descriptor_t *section_descriptor,

         libewf_io_handle_t *io_handle,

         libbfio_pool_t *file_io_pool,

         int file_io_pool_entry,

         libewf_read_io_handle_t *read_io_handle,

         libewf_media_values_t *media_values,

         libfvalue_table_t *header_values,

         libcerror_error_t **error )

{

  uint8_t *string_data    = NULL;

  static char *function   = "libewf_case_data_section_read_file_io_pool";

  size_t string_data_size = 0;

  ssize_t read_count      = 0;

  if( section_descriptor == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid section descriptor.",

     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( 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 );

  }

  read_count = libewf_section_compressed_string_read(

          section_descriptor,

          io_handle,

          file_io_pool,

          file_io_pool_entry,

          io_handle->compression_method,

          &string_data,

          &string_data_size,

          error );

  if( read_count == -1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_IO,

     LIBCERROR_IO_ERROR_READ_FAILED,

     "%s: unable to read case data file object string.",

     function );

    goto on_error;

  }

  else if( read_count != 0 )

  {

    if( read_io_handle->case_data == NULL )

    {

      if( libewf_case_data_parse(

           string_data,

           string_data_size,

           media_values,

           header_values,

           &( io_handle->format ),

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_SET_FAILED,

         "%s: unable to parse case data.",

         function );

        goto on_error;

      }

      read_io_handle->case_data      = string_data;

      read_io_handle->case_data_size = string_data_size;

    }

    else

    {

      if( ( read_io_handle->case_data_size != string_data_size )

       || ( memory_compare(

             read_io_handle->case_data,

             string_data,

             string_data_size ) != 0 ) )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_INPUT,

         LIBCERROR_INPUT_ERROR_VALUE_MISMATCH,

         "%s: case data does not match.",

         function );

        goto on_error;

      }

      memory_free(

       string_data );

    }

  }

  return( read_count );

on_error:

  if( string_data != NULL )

  {

    memory_free(

     string_data );

  }

  return( -1 );

}