/*

 * Input/Output (IO) handle functions

 *

 * Copyright (C) 2011-2025, 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 <narrow_string.h>

#include <system_string.h>

#include <types.h>

#include "libexe_codepage.h"

#include "libexe_coff_header.h"

#include "libexe_coff_optional_header.h"

#include "libexe_data_directory_descriptor.h"

#include "libexe_debug.h"

#include "libexe_definitions.h"

#include "libexe_io_handle.h"

#include "libexe_le_header.h"

#include "libexe_libbfio.h"

#include "libexe_libcerror.h"

#include "libexe_libcdata.h"

#include "libexe_libcnotify.h"

#include "libexe_libfdatetime.h"

#include "libexe_mz_header.h"

#include "libexe_ne_header.h"

#include "libexe_section_descriptor.h"

#include "libexe_unused.h"

#include "exe_file_header.h"

#include "exe_mz_header.h"

#include "exe_pe_header.h"

#include "exe_section_table.h"

const char *exe_pe_signature = "PE\x0\x0";

/* Creates an IO handle

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

 * Returns 1 if successful or -1 on error

 */

int libexe_io_handle_initialize(

     libexe_io_handle_t **io_handle,

     libcerror_error_t **error )

{

  static char *function = "libexe_io_handle_initialize";

  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( *io_handle != NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

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

     function );

    return( -1 );

  }

  *io_handle = memory_allocate_structure(

                libexe_io_handle_t );

  if( *io_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,

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

     function );

    goto on_error;

  }

  if( memory_set(

       *io_handle,

       0,

       sizeof( libexe_io_handle_t ) ) == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_SET_FAILED,

     "%s: unable to clear file.",

     function );

    memory_free(

     *io_handle );

    *io_handle = NULL;

    return( -1 );

  }

  ( *io_handle )->executable_type = LIBEXE_EXECUTABLE_TYPE_MZ;

  ( *io_handle )->ascii_codepage  = LIBEXE_CODEPAGE_WINDOWS_1252;

  return( 1 );

on_error:

  if( *io_handle != NULL )

  {

    memory_free(

     *io_handle );

    *io_handle = NULL;

  }

  return( -1 );

}

/* Frees an IO handle

 * Returns 1 if successful or -1 on error

 */

int libexe_io_handle_free(

     libexe_io_handle_t **io_handle,

     libcerror_error_t **error )

{

  static char *function = "libexe_io_handle_free";

  int result            = 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( *io_handle != NULL )

  {

    if( libexe_io_handle_clear(

         *io_handle,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,

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

       function );

      result = -1;

    }

    if( ( *io_handle )->coff_header != NULL )

    {

      if( libexe_coff_header_free(

           &( ( *io_handle )->coff_header ),

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,

         "%s: unable to free COFF header.",

         function );

        result = -1;

      }

    }

    if( ( *io_handle )->coff_optional_header != NULL )

    {

      if( libexe_coff_optional_header_free(

           &( ( *io_handle )->coff_optional_header ),

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,

         "%s: unable to free COFF optional header.",

         function );

        result = -1;

      }

    }

    memory_free(

     *io_handle );

    *io_handle = NULL;

  }

  return( result );

}

/* Clears the IO handle

 * Returns 1 if successful or -1 on error

 */

int libexe_io_handle_clear(

     libexe_io_handle_t *io_handle,

     libcerror_error_t **error )

{

  static char *function = "libexe_io_handle_clear";

  if( io_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid IO handle.",

     function );

    return( -1 );

  }

/* TODO refactor

  if( memory_set(

       io_handle,

       0,

       sizeof( libexe_io_handle_t ) ) == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_SET_FAILED,

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

     function );

    return( -1 );

  }

*/

  if( io_handle->coff_header != NULL )

  {

    if( libexe_coff_header_free(

         &( io_handle->coff_header ),

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,

       "%s: unable to free COFF header.",

       function );

      return( -1 );

    }

  }

  if( io_handle->coff_optional_header != NULL )

  {

    if( libexe_coff_optional_header_free(

         &( io_handle->coff_optional_header ),

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,

       "%s: unable to free COFF optional header.",

       function );

      return( -1 );

    }

  }

  io_handle->executable_type = LIBEXE_EXECUTABLE_TYPE_MZ;

  io_handle->ascii_codepage  = LIBEXE_CODEPAGE_WINDOWS_1252;

  return( 1 );

}

/* Reads the file header

 * Returns 1 if successful or -1 on error

 */

int libexe_io_handle_read_file_header(

     libexe_io_handle_t *io_handle,

     libbfio_handle_t *file_io_handle,

     uint16_t *number_of_sections,

     libcerror_error_t **error )

{

  libexe_mz_header_t *mz_header   = NULL;

  static char *function           = "libexe_io_handle_read_file_header";

  if( libexe_mz_header_initialize(

       &mz_header,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to create MZ header.",

     function );

    goto on_error;

  }

  if( libexe_mz_header_read_file_io_handle(

       mz_header,

       file_io_handle,

       0,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_IO,

     LIBCERROR_IO_ERROR_READ_FAILED,

     "%s: unable to read MZ header.",

     function );

    goto on_error;

  }

/* TODO check if value is sane */

  if( mz_header->extended_header_offset != 0 )

  {

/* TODO print data between current offset and extended_header_offset */

    if( libexe_io_handle_read_extended_header(

         io_handle,

         file_io_handle,

         mz_header->extended_header_offset,

         number_of_sections,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_IO,

       LIBCERROR_IO_ERROR_READ_FAILED,

       "%s: unable to read extended header.",

       function );

      goto on_error;

    }

  }

  if( libexe_mz_header_free(

       &mz_header,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,

     "%s: unable to free MZ header.",

     function );

    goto on_error;

  }

  return( 1 );

on_error:

  if( mz_header != NULL )

  {

    libexe_mz_header_free(

     &mz_header,

     NULL );

  }

  return( -1 );

}

/* Reads the extended header

 * Returns 1 if successful or -1 on error

 */

int libexe_io_handle_read_extended_header(

     libexe_io_handle_t *io_handle,

     libbfio_handle_t *file_io_handle,

     uint32_t extended_header_offset,

     uint16_t *number_of_sections,

     libcerror_error_t **error )

{

  uint8_t extended_header_data[ 2 ];

  static char *function = "libexe_io_handle_read_extended_header";

  ssize_t read_count    = 0;

  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 defined( HAVE_DEBUG_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

    libcnotify_printf(

     "%s: reading extended header at offset: %" PRIu32 " (0x%08" PRIx32 ")\n",

     function,

     extended_header_offset,

     extended_header_offset );

  }

#endif

  read_count = libbfio_handle_read_buffer_at_offset(

                file_io_handle,

                extended_header_data,

                2,

                (off64_t) extended_header_offset,

                error );

  if( read_count != 2 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_IO,

     LIBCERROR_IO_ERROR_READ_FAILED,

     "%s: unable to read first 2 bytes of extended header data at offset: %" PRIu32 " (0x%08" PRIx32 ").",

     function,

     extended_header_offset,

     extended_header_offset );

    return( -1 );

  }

#if defined( HAVE_DEBUG_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

    libcnotify_printf(

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

     function );

    libcnotify_print_data(

     extended_header_data,

     2,

     0 );

  }

#endif

/* TODO pass extended header, so it is read once */

  if( ( extended_header_data[ 0 ] == (uint8_t) 'L' )

   && ( extended_header_data[ 1 ] == (uint8_t) 'E' ) )

  {

    if( libexe_io_handle_read_le_header(

         io_handle,

         file_io_handle,

         extended_header_offset,

         number_of_sections,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_IO,

       LIBCERROR_IO_ERROR_READ_FAILED,

       "%s: unable to read LE header.",

       function );

      return( -1 );

    }

  }

  else if( ( extended_header_data[ 0 ] == (uint8_t) 'N' )

        && ( extended_header_data[ 1 ] == (uint8_t) 'E' ) )

  {

    if( libexe_io_handle_read_ne_header(

         io_handle,

         file_io_handle,

         extended_header_offset,

         number_of_sections,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_IO,

       LIBCERROR_IO_ERROR_READ_FAILED,

       "%s: unable to read NE header.",

       function );

      return( -1 );

    }

  }

  else if( ( extended_header_data[ 0 ] == (uint8_t) 'P' )

        && ( extended_header_data[ 1 ] == (uint8_t) 'E' ) )

  {

    if( libexe_io_handle_read_pe_header(

         io_handle,

         file_io_handle,

         extended_header_offset,

         number_of_sections,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_IO,

       LIBCERROR_IO_ERROR_READ_FAILED,

       "%s: unable to read PE/COFF header.",

       function );

      return( -1 );

    }

  }

  else

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,

     "%s: unsupported extended header.",

     function );

    return( -1 );

  }

  return( 1 );

}

/* Reads the LE header

 * Returns 1 if successful or -1 on error

 */

int libexe_io_handle_read_le_header(

     libexe_io_handle_t *io_handle,

     libbfio_handle_t *file_io_handle,

     uint32_t le_header_offset,

     uint16_t *number_of_sections,

     libcerror_error_t **error )

{

  libexe_le_header_t *le_header = NULL;

  static char *function         = "libexe_io_handle_read_le_header";

  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( number_of_sections == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid number of sections.",

     function );

    return( -1 );

  }

  if( libexe_le_header_initialize(

       &le_header,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to create LE header.",

     function );

    goto on_error;

  }

  if( libexe_le_header_read_file_io_handle(

       le_header,

       file_io_handle,

       0,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_IO,

     LIBCERROR_IO_ERROR_READ_FAILED,

     "%s: unable to read LE header.",

     function );

    goto on_error;

  }

  io_handle->executable_type = LIBEXE_EXECUTABLE_TYPE_LE;

  *number_of_sections = 0;

  if( libexe_le_header_free(

       &le_header,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,

     "%s: unable to free LE header.",

     function );

    goto on_error;

  }

  return( 1 );

on_error:

  if( le_header != NULL )

  {

    libexe_le_header_free(

     &le_header,

     NULL );

  }

  return( -1 );

}

/* Reads the NE header

 * Returns 1 if successful or -1 on error

 */

int libexe_io_handle_read_ne_header(

     libexe_io_handle_t *io_handle,

     libbfio_handle_t *file_io_handle,

     uint32_t ne_header_offset,

     uint16_t *number_of_sections,

     libcerror_error_t **error )

{

  libexe_ne_header_t *ne_header = NULL;

  static char *function         = "libexe_io_handle_read_ne_header";

  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( number_of_sections == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid number of sections.",

     function );

    return( -1 );

  }

  if( libexe_ne_header_initialize(

       &ne_header,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to create NE header.",

     function );

    goto on_error;

  }

  if( libexe_ne_header_read_file_io_handle(

       ne_header,

       file_io_handle,

       0,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_IO,

     LIBCERROR_IO_ERROR_READ_FAILED,

     "%s: unable to read NE header.",

     function );

    goto on_error;

  }

  io_handle->executable_type = LIBEXE_EXECUTABLE_TYPE_NE;

  *number_of_sections = 0;

  if( libexe_ne_header_free(

       &ne_header,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,

     "%s: unable to free NE header.",

     function );

    goto on_error;

  }

  return( 1 );

on_error:

  if( ne_header != NULL )

  {

    libexe_ne_header_free(

     &ne_header,

     NULL );

  }

  return( -1 );

}

/* Reads the PE/COFF header

 * Returns 1 if successful or -1 on error

 */

int libexe_io_handle_read_pe_header(

     libexe_io_handle_t *io_handle,

     libbfio_handle_t *file_io_handle,

     uint32_t pe_header_offset,

     uint16_t *number_of_sections,

     libcerror_error_t **error )

{

  exe_pe_header_t pe_header;

  static char *function = "libexe_io_handle_read_pe_header";

  ssize_t read_count    = 0;

  off64_t file_offset   = 0;

  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( number_of_sections == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid number of sections.",

     function );

    return( -1 );

  }

#if defined( HAVE_DEBUG_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

    libcnotify_printf(

     "%s: reading PE header at offset: %" PRIu32 " (0x%08" PRIx32 ")\n",

     function,

     pe_header_offset,

     pe_header_offset );

  }

#endif

  read_count = libbfio_handle_read_buffer_at_offset(

                file_io_handle,

                (uint8_t *) &pe_header,

                sizeof( exe_pe_header_t ),

                (off64_t) pe_header_offset,

                error );

  if( read_count != (ssize_t) sizeof( exe_pe_header_t ) )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_IO,

     LIBCERROR_IO_ERROR_READ_FAILED,

     "%s: unable to read PE header data at offset: %" PRIu32 " (0x%08" PRIx32 ").",

     function,

     pe_header_offset,

     pe_header_offset );

    return( -1 );

  }

#if defined( HAVE_DEBUG_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

    libcnotify_printf(

     "%s: PE header:\n",

     function );

    libcnotify_print_data(

     (uint8_t *) &pe_header,

     sizeof( exe_pe_header_t ),

     0 );

  }

#endif

  if( memory_compare(

       pe_header.signature,

       exe_pe_signature,

       4 ) != 0 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,

     "%s: invalid signature.",

     function );

    return( -1 );

  }

#if defined( HAVE_DEBUG_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

    libcnotify_printf(

     "%s: signature\t\t\t\t: %c%c\\x%" PRIx8 "\\x%" PRIx8 "\n",

     function,

     pe_header.signature[ 0 ],

     pe_header.signature[ 1 ],

     pe_header.signature[ 2 ],

     pe_header.signature[ 3 ] );

    libcnotify_printf(

     "\n" );

  }

#endif

  if( libexe_coff_header_initialize(

       &( io_handle->coff_header ),

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to create COFF header.",

     function );

    goto on_error;

  }

  file_offset = pe_header_offset + sizeof( exe_pe_header_t );

  if( libexe_coff_header_read_file_io_handle(

       io_handle->coff_header,

       file_io_handle,

       file_offset,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_IO,

     LIBCERROR_IO_ERROR_READ_FAILED,

     "%s: unable to read COFF header.",

     function );

    goto on_error;

  }

  file_offset += sizeof( exe_coff_header_t );

  *number_of_sections = io_handle->coff_header->number_of_sections;

  if( io_handle->coff_header->optional_header_size > 0 )

  {

    if( libexe_coff_optional_header_initialize(

         &( io_handle->coff_optional_header ),

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

       "%s: unable to create COFF optional header.",

       function );

      goto on_error;

    }

    if( libexe_coff_optional_header_read_file_io_handle(

         io_handle->coff_optional_header,

         file_io_handle,

         file_offset,

         io_handle->coff_header->optional_header_size,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_IO,

       LIBCERROR_IO_ERROR_READ_FAILED,

       "%s: unable to read COFF optional header.",

       function );

      goto on_error;

    }

  }

  io_handle->executable_type = LIBEXE_EXECUTABLE_TYPE_PE_COFF;

  return( 1 );

on_error:

  if( io_handle->coff_optional_header != NULL )

  {

    libexe_coff_optional_header_free(

     &( io_handle->coff_optional_header ),

     NULL );

  }

  if( io_handle->coff_header != NULL )

  {

    libexe_coff_header_free(

     &( io_handle->coff_header ),

     NULL );

  }

  return( -1 );

}

/* Reads the section table

 * Returns 1 if successful or -1 on error

 */

int libexe_io_handle_read_section_table(

     libexe_io_handle_t *io_handle,

     libbfio_handle_t *file_io_handle,

     uint16_t number_of_sections,

     libcdata_array_t *sections_array,

     libcerror_error_t **error )

{

  libexe_section_descriptor_t *section_descriptor = NULL;

  uint8_t *section_table                          = NULL;

  uint8_t *section_table_data                     = NULL;

  static char *function                           = "libexe_io_handle_read_section_table";

  size_t section_table_size                       = 0;

  ssize_t read_count                              = 0;

  uint32_t section_data_offset                    = 0;

  uint32_t section_data_size                      = 0;

  uint16_t section_index                          = 0;

  int entry_index                                 = 0;

#if defined( HAVE_DEBUG_OUTPUT )

  uint32_t value_32bit                            = 0;

  uint16_t value_16bit                            = 0;

#endif

  if( io_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid IO handle.",

     function );

    return( -1 );

  }

  section_table_size = sizeof( exe_section_table_entry_t )

                     * number_of_sections;

  if( ( section_table_size == 0 )

   || ( section_table_size > MEMORY_MAXIMUM_ALLOCATION_SIZE ) )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

     "%s: invalid section table size value out of bounds.",

     function );

    return( -1 );

  }

  section_table = (uint8_t *) memory_allocate(

                               sizeof( uint8_t ) * section_table_size );

  if( section_table == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,

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

     function );

    goto on_error;

  }

  read_count = libbfio_handle_read_buffer(

                file_io_handle,

                section_table,

                section_table_size,

                error );

  if( read_count != (ssize_t) section_table_size )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_IO,

     LIBCERROR_IO_ERROR_READ_FAILED,

     "%s: unable to read section table.",

     function );

    goto on_error;

  }

#if defined( HAVE_DEBUG_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

    libcnotify_printf(

     "%s: section table data:\n",

     function );

    libcnotify_print_data(

     section_table,

     section_table_size,

     0 );

  }

#endif

  section_table_data = section_table;

  while( section_table_size >= sizeof( exe_section_table_entry_t ) )