/*

 * Section descriptor functions

 *

 * Copyright (C) 2011-2026, 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 <memory.h>

#include <types.h>

#include "libexe_io_handle.h"

#include "libexe_libcerror.h"

#include "libexe_libfcache.h"

#include "libexe_libfdata.h"

#include "libexe_section_descriptor.h"

/* Creates a section descriptor

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

 * Returns 1 if successful or -1 on error

 */

int libexe_section_descriptor_initialize(

     libexe_section_descriptor_t **section_descriptor,

     libcerror_error_t **error )

{

  static char *function = "libexe_section_descriptor_initialize";

  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( *section_descriptor != NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

     "%s: invalid section descriptor value already set.",

     function );

    return( -1 );

  }

  *section_descriptor = memory_allocate_structure(

                         libexe_section_descriptor_t );

  if( *section_descriptor == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,

     "%s: unable to create section descriptor.",

     function );

    goto on_error;

  }

  if( memory_set(

       *section_descriptor,

       0,

       sizeof( libexe_section_descriptor_t ) ) == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_SET_FAILED,

     "%s: unable to clear section descriptor.",

     function );

    memory_free(

     *section_descriptor );

    *section_descriptor = NULL;

    return( -1 );

  }

  if( libfdata_stream_initialize(

       &( ( *section_descriptor )->data_stream ),

       NULL,

       NULL,

       NULL,

       NULL,

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

       NULL,

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

       0,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

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

     function );

    goto on_error;

  }

  if( libfdata_stream_resize(

       ( *section_descriptor )->data_stream,

       1,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_RESIZE_FAILED,

     "%s: unable to resize data stream.",

     function );

    goto on_error;

  }

  return( 1 );

on_error:

  if( *section_descriptor != NULL )

  {

    if( ( *section_descriptor )->data_stream != NULL )

    {

      libfdata_stream_free(

       &( ( *section_descriptor )->data_stream ),

       NULL );

    }

    memory_free(

     *section_descriptor );

    *section_descriptor = NULL;

  }

  return( -1 );

}

/* Frees a section descriptor

 * Returns 1 if successful or -1 on error

 */

int libexe_section_descriptor_free(

     libexe_section_descriptor_t **section_descriptor,

     libcerror_error_t **error )

{

  static char *function = "libexe_section_descriptor_free";

  int result            = 1;

  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( *section_descriptor != NULL )

  {

    if( libfdata_stream_free(

         &( ( *section_descriptor )->data_stream ),

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,

       "%s: unable to free data stream.",

       function );

      result = -1;

    }

    memory_free(

     *section_descriptor );

    *section_descriptor = NULL;

  }

  return( result );

}

/* Retrieves the data size

 * Returns 1 if successful or -1 on error

 */

int libexe_section_descriptor_get_data_size(

     libexe_section_descriptor_t *section_descriptor,

     size64_t *data_size,

     libcerror_error_t **error )

{

  static char *function = "libexe_section_descriptor_get_data_size";

  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( libfdata_stream_get_size(

       section_descriptor->data_stream,

       data_size,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_GET_FAILED,

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

     function );

    return( -1 );

  }

  return( 1 );

}

/* Retrieves the data range

 * Returns 1 if successful or -1 on error

 */

int libexe_section_descriptor_get_data_range(

     libexe_section_descriptor_t *section_descriptor,

     off64_t *data_offset,

     size64_t *data_size,

     libcerror_error_t **error )

{

  static char *function  = "libexe_section_descriptor_get_data_range";

  uint32_t segment_flags = 0;

  int segment_file_index = 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( libfdata_stream_get_segment_by_index(

       section_descriptor->data_stream,

       0,

       &segment_file_index,

       data_offset,

       data_size,

       &segment_flags,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_GET_FAILED,

     "%s: unable to retrieve segment from data stream.",

     function );

    return( -1 );

  }

  return( 1 );

}

/* Sets the data range

 * Returns 1 if successful or -1 on error

 */

int libexe_section_descriptor_set_data_range(

     libexe_section_descriptor_t *section_descriptor,

     off64_t data_offset,

     size64_t data_size,

     libcerror_error_t **error )

{

  static char *function = "libexe_section_descriptor_set_data_range";

  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( libfdata_stream_set_segment_by_index(

       section_descriptor->data_stream,

       0,

       0,

       data_offset,

       data_size,

       0,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_SET_FAILED,

     "%s: unable to set segment in data stream.",

     function );

    return( -1 );

  }

  return( 1 );

}