/src/libewf/libuna/libuna_utf16_stream.c

Source (jump to first uncovered line)
/*
 * UTF-16 stream functions
 *
 * Copyright (C) 2008-2024, 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 "libuna_definitions.h"
#include "libuna_libcerror.h"
#include "libuna_types.h"
#include "libuna_unicode_character.h"
#include "libuna_utf16_stream.h"

/* Copies an UTF-16 stream byte order mark (BOM)
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_stream_copy_byte_order_mark(
     uint8_t *utf16_stream,
     size_t utf16_stream_size,
     size_t *utf16_stream_index,
     int byte_order,
     libcerror_error_t **error )
{
  static char *function = "libuna_utf16_stream_copy_byte_order_mark";

  if( utf16_stream == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid UTF-16 stream.",
     function );

    return( -1 );
  }
  if( utf16_stream_size > (size_t) SSIZE_MAX )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
     "%s: invalid UTF-16 stream size value exceeds maximum.",
     function );

    return( -1 );
  }
  if( utf16_stream_index == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid UTF-16 stream index.",
     function );

    return( -1 );
  }
  if( ( *utf16_stream_index + 2 ) > utf16_stream_size )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
     "%s: UTF-16 stream too small.",
     function );

    return( -1 );
  }
  if( ( byte_order != LIBUNA_ENDIAN_BIG )
   && ( byte_order != LIBUNA_ENDIAN_LITTLE ) )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE,
     "%s: unsupported byte order.",
     function );

    return( -1 );
  }
  if( byte_order == LIBUNA_ENDIAN_BIG )
  {
    utf16_stream[ *utf16_stream_index     ] = 0xfe;
    utf16_stream[ *utf16_stream_index + 1 ] = 0xff;
  }
  else if( byte_order == LIBUNA_ENDIAN_LITTLE )
  {
    utf16_stream[ *utf16_stream_index     ] = 0xff;
    utf16_stream[ *utf16_stream_index + 1 ] = 0xfe;
  }
  *utf16_stream_index += 2;

  return( 1 );
}

/* Determines the size of an UTF-16 stream from an UTF-8 string
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_stream_size_from_utf8(
     const libuna_utf8_character_t *utf8_string,
     size_t utf8_string_size,
     size_t *utf16_stream_size,
     libcerror_error_t **error )
{
  static char *function                        = "libuna_utf16_stream_size_from_utf8";
  libuna_unicode_character_t unicode_character = 0;
  size_t safe_utf16_stream_size                = 0;
  size_t utf8_string_index                     = 0;

  if( utf8_string == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid UTF-8 string.",
     function );

    return( -1 );
  }
  if( utf8_string_size > (size_t) SSIZE_MAX )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
     "%s: invalid UTF-8 string size value exceeds maximum.",
     function );

    return( -1 );
  }
  if( utf16_stream_size == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid UTF-16 stream size.",
     function );

    return( -1 );
  }
  /* Add the byte order mark
   */
  safe_utf16_stream_size = 1;

  while( utf8_string_index < utf8_string_size )
  {
    /* Convert the UTF-8 character bytes into an Unicode character
     */
    if( libuna_unicode_character_copy_from_utf8(
         &unicode_character,
         utf8_string,
         utf8_string_size,
         &utf8_string_index,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_CONVERSION,
       LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
       "%s: unable to copy Unicode character from UTF-8.",
       function );

      return( -1 );
    }
    /* Determine how many UTF-16 character bytes are required
     */
    if( libuna_unicode_character_size_to_utf16(
         unicode_character,
         &safe_utf16_stream_size,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_CONVERSION,
       LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
       "%s: unable to determine size of Unicode character in UTF-16.",
       function );

      return( -1 );
    }
    if( unicode_character == 0 )
    {
      break;
    }
  }
  /* Convert the number of characters into bytes
   */
  *utf16_stream_size = safe_utf16_stream_size * 2;

  return( 1 );
}

/* Copies an UTF-16 stream from an UTF-8 string
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_stream_copy_from_utf8(
     uint8_t *utf16_stream,
     size_t utf16_stream_size,
     int byte_order,
     const libuna_utf8_character_t *utf8_string,
     size_t utf8_string_size,
     libcerror_error_t **error )
{
  static char *function                        = "libuna_utf16_stream_copy_from_utf8";
  libuna_unicode_character_t unicode_character = 0;
  size_t utf16_stream_index                    = 0;
  size_t utf8_string_index                     = 0;

  if( utf16_stream == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid UTF-16 stream.",
     function );

    return( -1 );
  }
  if( utf16_stream_size > (size_t) SSIZE_MAX )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
     "%s: invalid UTF-16 stream size value exceeds maximum.",
     function );

    return( -1 );
  }
  if( ( byte_order != LIBUNA_ENDIAN_BIG )
   && ( byte_order != LIBUNA_ENDIAN_LITTLE ) )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE,
     "%s: unsupported byte order.",
     function );

    return( -1 );
  }
  if( utf8_string == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid UTF-8 string.",
     function );

    return( -1 );
  }
  if( utf8_string_size > (size_t) SSIZE_MAX )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
     "%s: invalid UTF-8 string size value exceeds maximum.",
     function );

    return( -1 );
  }
  if( libuna_utf16_stream_copy_byte_order_mark(
       utf16_stream,
       utf16_stream_size,
       &utf16_stream_index,
       byte_order,
       error ) != 1 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_CONVERSION,
     LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
     "%s: unable to copy UTF-16 byte order mark.",
     function );

    return( -1 );
  }
  while( utf8_string_index < utf8_string_size )
  {
    /* Convert the UTF-8 string bytes into an Unicode character
     */
    if( libuna_unicode_character_copy_from_utf8(
         &unicode_character,
         utf8_string,
         utf8_string_size,
         &utf8_string_index,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_CONVERSION,
       LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
       "%s: unable to copy Unicode character from UTF-8 string.",
       function );

      return( -1 );
    }
    /* Convert the Unicode character into UTF-16 stream bytes
     */
    if( libuna_unicode_character_copy_to_utf16_stream(
         unicode_character,
         utf16_stream,
         utf16_stream_size,
         &utf16_stream_index,
         byte_order,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_CONVERSION,
       LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
       "%s: unable to copy Unicode character to UTF-16 stream.",
       function );

      return( -1 );
    }
    if( unicode_character == 0 )
    {
      break;
    }
  }
  return( 1 );
}

/* Determines the size of an UTF-16 stream from an UTF-16 string
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_stream_size_from_utf16(
     const libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     size_t *utf16_stream_size,
     libcerror_error_t **error )
{
  static char *function                        = "libuna_utf16_stream_size_from_utf16";
  libuna_unicode_character_t unicode_character = 0;
  size_t safe_utf16_stream_size                = 0;
  size_t utf16_string_index                    = 0;

  if( utf16_string == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid UTF-16 string.",
     function );

    return( -1 );
  }
  if( utf16_string_size > (size_t) SSIZE_MAX )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
     "%s: invalid UTF-16 string size value exceeds maximum.",
     function );

    return( -1 );
  }
  if( utf16_stream_size == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid UTF-16 stream size.",
     function );

    return( -1 );
  }
  /* Add the byte order mark
   */
  safe_utf16_stream_size = 1;

  while( utf16_string_index < utf16_string_size )
  {
    /* Convert the UTF-16 character bytes into an Unicode character
     */
    if( libuna_unicode_character_copy_from_utf16(
         &unicode_character,
         utf16_string,
         utf16_string_size,
         &utf16_string_index,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_CONVERSION,
       LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
       "%s: unable to copy Unicode character from UTF-16.",
       function );

      return( -1 );
    }
    /* Determine how many UTF-16 character bytes are required
     */
    if( libuna_unicode_character_size_to_utf16(
         unicode_character,
         &safe_utf16_stream_size,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_CONVERSION,
       LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
       "%s: unable to determine size of Unicode character in UTF-16.",
       function );

      return( -1 );
    }
    if( unicode_character == 0 )
    {
      break;
    }
  }
  /* Convert the number of characters into bytes
   */
  *utf16_stream_size = safe_utf16_stream_size * 2;

  return( 1 );
}

/* Copies an UTF-16 stream from an UTF-16 string
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_stream_copy_from_utf16(
     uint8_t *utf16_stream,
     size_t utf16_stream_size,
     int byte_order,
     const libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     libcerror_error_t **error )
{
  static char *function                        = "libuna_utf16_stream_copy_from_utf16";
  libuna_unicode_character_t unicode_character = 0;
  size_t utf16_stream_index                    = 0;
  size_t utf16_string_index                    = 0;

  if( utf16_stream == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid UTF-16 stream.",
     function );

    return( -1 );
  }
  if( utf16_stream_size > (size_t) SSIZE_MAX )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
     "%s: invalid UTF-16 stream size value exceeds maximum.",
     function );

    return( -1 );
  }
  if( ( byte_order != LIBUNA_ENDIAN_BIG )
   && ( byte_order != LIBUNA_ENDIAN_LITTLE ) )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE,
     "%s: unsupported byte order.",
     function );

    return( -1 );
  }
  if( utf16_string == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid UTF-16 string.",
     function );

    return( -1 );
  }
  if( utf16_string_size > (size_t) SSIZE_MAX )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
     "%s: invalid UTF-16 string size value exceeds maximum.",
     function );

    return( -1 );
  }
  if( libuna_utf16_stream_copy_byte_order_mark(
       utf16_stream,
       utf16_stream_size,
       &utf16_stream_index,
       byte_order,
       error ) != 1 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_CONVERSION,
     LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
     "%s: unable to copy UTF-16 byte order mark.",
     function );

    return( -1 );
  }
  while( utf16_string_index < utf16_string_size )
  {
    /* Convert the UTF-16 string bytes into an Unicode character
     */
    if( libuna_unicode_character_copy_from_utf16(
         &unicode_character,
         utf16_string,
         utf16_string_size,
         &utf16_string_index,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_CONVERSION,
       LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
       "%s: unable to copy Unicode character from UTF-16 string.",
       function );

      return( -1 );
    }
    /* Convert the Unicode character into UTF-16 stream bytes
     */
    if( libuna_unicode_character_copy_to_utf16_stream(
         unicode_character,
         utf16_stream,
         utf16_stream_size,
         &utf16_stream_index,
         byte_order,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_CONVERSION,
       LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
       "%s: unable to copy Unicode character to UTF-16 stream.",
       function );

      return( -1 );
    }
    if( unicode_character == 0 )
    {
      break;
    }
  }
  return( 1 );
}

/* Determines the size of an UTF-16 stream from an UTF-32 string
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_stream_size_from_utf32(
     const libuna_utf32_character_t *utf32_string,
     size_t utf32_string_size,
     size_t *utf16_stream_size,
     libcerror_error_t **error )
{
  static char *function                        = "libuna_utf16_stream_size_from_utf32";
  libuna_unicode_character_t unicode_character = 0;
  size_t safe_utf16_stream_size                = 0;
  size_t utf32_string_index                    = 0;

  if( utf32_string == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid UTF-32 string.",
     function );

    return( -1 );
  }
  if( utf32_string_size > (size_t) SSIZE_MAX )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
     "%s: invalid UTF-32 string size value exceeds maximum.",
     function );

    return( -1 );
  }
  if( utf16_stream_size == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid UTF-16 stream size.",
     function );

    return( -1 );
  }
  /* Add the byte order mark
   */
  safe_utf16_stream_size += 1;

  while( utf32_string_index < utf32_string_size )
  {
    /* Convert the UTF-32 character bytes into an Unicode character
     */
    if( libuna_unicode_character_copy_from_utf32(
         &unicode_character,
         utf32_string,
         utf32_string_size,
         &utf32_string_index,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_CONVERSION,
       LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
       "%s: unable to copy Unicode character from UTF-32.",
       function );

      return( -1 );
    }
    /* Determine how many UTF-16 character bytes are required
     */
    if( libuna_unicode_character_size_to_utf16(
         unicode_character,
         &safe_utf16_stream_size,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_CONVERSION,
       LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
       "%s: unable to determine size of Unicode character in UTF-16.",
       function );

      return( -1 );
    }
    if( unicode_character == 0 )
    {
      break;
    }
  }
  /* Convert the number of characters into bytes
   */
  *utf16_stream_size = safe_utf16_stream_size * 2;

  return( 1 );
}

/* Copies an UTF-16 stream from an UTF-32 string
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_stream_copy_from_utf32(
     uint8_t *utf16_stream,
     size_t utf16_stream_size,
     int byte_order,
     const libuna_utf32_character_t *utf32_string,
     size_t utf32_string_size,
     libcerror_error_t **error )
{
  static char *function                        = "libuna_utf16_stream_copy_from_utf32";
  libuna_unicode_character_t unicode_character = 0;
  size_t utf16_stream_index                    = 0;
  size_t utf32_string_index                    = 0;

  if( utf16_stream == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid UTF-16 stream.",
     function );

    return( -1 );
  }
  if( utf16_stream_size > (size_t) SSIZE_MAX )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
     "%s: invalid UTF-16 stream size value exceeds maximum.",
     function );

    return( -1 );
  }
  if( ( byte_order != LIBUNA_ENDIAN_BIG )
   && ( byte_order != LIBUNA_ENDIAN_LITTLE ) )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE,
     "%s: unsupported byte order.",
     function );

    return( -1 );
  }
  if( utf32_string == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid UTF-32 string.",
     function );

    return( -1 );
  }
  if( utf32_string_size > (size_t) SSIZE_MAX )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
     "%s: invalid UTF-32 string size value exceeds maximum.",
     function );

    return( -1 );
  }
  if( libuna_utf16_stream_copy_byte_order_mark(
       utf16_stream,
       utf16_stream_size,
       &utf16_stream_index,
       byte_order,
       error ) != 1 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_CONVERSION,
     LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
     "%s: unable to copy UTF-16 byte order mark.",
     function );

    return( -1 );
  }
  while( utf32_string_index < utf32_string_size )
  {
    /* Convert the UTF-32 string bytes into an Unicode character
     */
    if( libuna_unicode_character_copy_from_utf32(
         &unicode_character,
         utf32_string,
         utf32_string_size,
         &utf32_string_index,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_CONVERSION,
       LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
       "%s: unable to copy Unicode character from UTF-32 string.",
       function );

      return( -1 );
    }
    /* Convert the Unicode character into UTF-16 stream bytes
     */
    if( libuna_unicode_character_copy_to_utf16_stream(
         unicode_character,
         utf16_stream,
         utf16_stream_size,
         &utf16_stream_index,
         byte_order,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_CONVERSION,
       LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
       "%s: unable to copy Unicode character to UTF-16 stream.",
       function );

      return( -1 );
    }
    if( unicode_character == 0 )
    {
      break;
    }
  }
  return( 1 );
}


Coverage Report

Created: 2024-02-25 07:20

Line	Count	Source (jump to first uncovered line)
1		/*
2		* UTF-16 stream functions
3		*
4		* Copyright (C) 2008-2024, Joachim Metz <joachim.metz@gmail.com>
5		*
6		* Refer to AUTHORS for acknowledgements.
7		*
8		* This program is free software: you can redistribute it and/or modify
9		* it under the terms of the GNU Lesser General Public License as published by
10		* the Free Software Foundation, either version 3 of the License, or
11		* (at your option) any later version.
12		*
13		* This program is distributed in the hope that it will be useful,
14		* but WITHOUT ANY WARRANTY; without even the implied warranty of
15		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16		* GNU General Public License for more details.
17		*
18		* You should have received a copy of the GNU Lesser General Public License
19		* along with this program. If not, see <https://www.gnu.org/licenses/>.
20		*/
21
22		#include <common.h>
23		#include <types.h>
24
25		#include "libuna_definitions.h"
26		#include "libuna_libcerror.h"
27		#include "libuna_types.h"
28		#include "libuna_unicode_character.h"
29		#include "libuna_utf16_stream.h"
30
31		/* Copies an UTF-16 stream byte order mark (BOM)
32		* Returns 1 if successful or -1 on error
33		*/
34		int libuna_utf16_stream_copy_byte_order_mark(
35		uint8_t *utf16_stream,
36		size_t utf16_stream_size,
37		size_t *utf16_stream_index,
38		int byte_order,
39		libcerror_error_t **error )
40	0	{
41	0	static char *function = "libuna_utf16_stream_copy_byte_order_mark";
42
43	0	if( utf16_stream == NULL )
44	0	{
45	0	libcerror_error_set(
46	0	error,
47	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
48	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
49	0	"%s: invalid UTF-16 stream.",
50	0	function );
51
52	0	return( -1 );
53	0	}
54	0	if( utf16_stream_size > (size_t) SSIZE_MAX )
55	0	{
56	0	libcerror_error_set(
57	0	error,
58	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
59	0	LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
60	0	"%s: invalid UTF-16 stream size value exceeds maximum.",
61	0	function );
62
63	0	return( -1 );
64	0	}
65	0	if( utf16_stream_index == NULL )
66	0	{
67	0	libcerror_error_set(
68	0	error,
69	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
70	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
71	0	"%s: invalid UTF-16 stream index.",
72	0	function );
73
74	0	return( -1 );
75	0	}
76	0	if( ( *utf16_stream_index + 2 ) > utf16_stream_size )
77	0	{
78	0	libcerror_error_set(
79	0	error,
80	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
81	0	LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
82	0	"%s: UTF-16 stream too small.",
83	0	function );
84
85	0	return( -1 );
86	0	}
87	0	if( ( byte_order != LIBUNA_ENDIAN_BIG )
88	0	&& ( byte_order != LIBUNA_ENDIAN_LITTLE ) )
89	0	{
90	0	libcerror_error_set(
91	0	error,
92	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
93	0	LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE,
94	0	"%s: unsupported byte order.",
95	0	function );
96
97	0	return( -1 );
98	0	}
99	0	if( byte_order == LIBUNA_ENDIAN_BIG )
100	0	{
101	0	utf16_stream[ *utf16_stream_index ] = 0xfe;
102	0	utf16_stream[ *utf16_stream_index + 1 ] = 0xff;
103	0	}
104	0	else if( byte_order == LIBUNA_ENDIAN_LITTLE )
105	0	{
106	0	utf16_stream[ *utf16_stream_index ] = 0xff;
107	0	utf16_stream[ *utf16_stream_index + 1 ] = 0xfe;
108	0	}
109	0	*utf16_stream_index += 2;
110
111	0	return( 1 );
112	0	}
113
114		/* Determines the size of an UTF-16 stream from an UTF-8 string
115		* Returns 1 if successful or -1 on error
116		*/
117		int libuna_utf16_stream_size_from_utf8(
118		const libuna_utf8_character_t *utf8_string,
119		size_t utf8_string_size,
120		size_t *utf16_stream_size,
121		libcerror_error_t **error )
122	0	{
123	0	static char *function = "libuna_utf16_stream_size_from_utf8";
124	0	libuna_unicode_character_t unicode_character = 0;
125	0	size_t safe_utf16_stream_size = 0;
126	0	size_t utf8_string_index = 0;
127
128	0	if( utf8_string == NULL )
129	0	{
130	0	libcerror_error_set(
131	0	error,
132	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
133	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
134	0	"%s: invalid UTF-8 string.",
135	0	function );
136
137	0	return( -1 );
138	0	}
139	0	if( utf8_string_size > (size_t) SSIZE_MAX )
140	0	{
141	0	libcerror_error_set(
142	0	error,
143	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
144	0	LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
145	0	"%s: invalid UTF-8 string size value exceeds maximum.",
146	0	function );
147
148	0	return( -1 );
149	0	}
150	0	if( utf16_stream_size == NULL )
151	0	{
152	0	libcerror_error_set(
153	0	error,
154	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
155	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
156	0	"%s: invalid UTF-16 stream size.",
157	0	function );
158
159	0	return( -1 );
160	0	}
161		/* Add the byte order mark
162		*/
163	0	safe_utf16_stream_size = 1;
164
165	0	while( utf8_string_index < utf8_string_size )
166	0	{
167		/* Convert the UTF-8 character bytes into an Unicode character
168		*/
169	0	if( libuna_unicode_character_copy_from_utf8(
170	0	&unicode_character,
171	0	utf8_string,
172	0	utf8_string_size,
173	0	&utf8_string_index,
174	0	error ) != 1 )
175	0	{
176	0	libcerror_error_set(
177	0	error,
178	0	LIBCERROR_ERROR_DOMAIN_CONVERSION,
179	0	LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
180	0	"%s: unable to copy Unicode character from UTF-8.",
181	0	function );
182
183	0	return( -1 );
184	0	}
185		/* Determine how many UTF-16 character bytes are required
186		*/
187	0	if( libuna_unicode_character_size_to_utf16(
188	0	unicode_character,
189	0	&safe_utf16_stream_size,
190	0	error ) != 1 )
191	0	{
192	0	libcerror_error_set(
193	0	error,
194	0	LIBCERROR_ERROR_DOMAIN_CONVERSION,
195	0	LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
196	0	"%s: unable to determine size of Unicode character in UTF-16.",
197	0	function );
198
199	0	return( -1 );
200	0	}
201	0	if( unicode_character == 0 )
202	0	{
203	0	break;
204	0	}
205	0	}
206		/* Convert the number of characters into bytes
207		*/
208	0	utf16_stream_size = safe_utf16_stream_size 2;
209
210	0	return( 1 );
211	0	}
212
213		/* Copies an UTF-16 stream from an UTF-8 string
214		* Returns 1 if successful or -1 on error
215		*/
216		int libuna_utf16_stream_copy_from_utf8(
217		uint8_t *utf16_stream,
218		size_t utf16_stream_size,
219		int byte_order,
220		const libuna_utf8_character_t *utf8_string,
221		size_t utf8_string_size,
222		libcerror_error_t **error )
223	0	{
224	0	static char *function = "libuna_utf16_stream_copy_from_utf8";
225	0	libuna_unicode_character_t unicode_character = 0;
226	0	size_t utf16_stream_index = 0;
227	0	size_t utf8_string_index = 0;
228
229	0	if( utf16_stream == NULL )
230	0	{
231	0	libcerror_error_set(
232	0	error,
233	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
234	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
235	0	"%s: invalid UTF-16 stream.",
236	0	function );
237
238	0	return( -1 );
239	0	}
240	0	if( utf16_stream_size > (size_t) SSIZE_MAX )
241	0	{
242	0	libcerror_error_set(
243	0	error,
244	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
245	0	LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
246	0	"%s: invalid UTF-16 stream size value exceeds maximum.",
247	0	function );
248
249	0	return( -1 );
250	0	}
251	0	if( ( byte_order != LIBUNA_ENDIAN_BIG )
252	0	&& ( byte_order != LIBUNA_ENDIAN_LITTLE ) )
253	0	{
254	0	libcerror_error_set(
255	0	error,
256	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
257	0	LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE,
258	0	"%s: unsupported byte order.",
259	0	function );
260
261	0	return( -1 );
262	0	}
263	0	if( utf8_string == NULL )
264	0	{
265	0	libcerror_error_set(
266	0	error,
267	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
268	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
269	0	"%s: invalid UTF-8 string.",
270	0	function );
271
272	0	return( -1 );
273	0	}
274	0	if( utf8_string_size > (size_t) SSIZE_MAX )
275	0	{
276	0	libcerror_error_set(
277	0	error,
278	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
279	0	LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
280	0	"%s: invalid UTF-8 string size value exceeds maximum.",
281	0	function );
282
283	0	return( -1 );
284	0	}
285	0	if( libuna_utf16_stream_copy_byte_order_mark(
286	0	utf16_stream,
287	0	utf16_stream_size,
288	0	&utf16_stream_index,
289	0	byte_order,
290	0	error ) != 1 )
291	0	{
292	0	libcerror_error_set(
293	0	error,
294	0	LIBCERROR_ERROR_DOMAIN_CONVERSION,
295	0	LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
296	0	"%s: unable to copy UTF-16 byte order mark.",
297	0	function );
298
299	0	return( -1 );
300	0	}
301	0	while( utf8_string_index < utf8_string_size )
302	0	{
303		/* Convert the UTF-8 string bytes into an Unicode character
304		*/
305	0	if( libuna_unicode_character_copy_from_utf8(
306	0	&unicode_character,
307	0	utf8_string,
308	0	utf8_string_size,
309	0	&utf8_string_index,
310	0	error ) != 1 )
311	0	{
312	0	libcerror_error_set(
313	0	error,
314	0	LIBCERROR_ERROR_DOMAIN_CONVERSION,
315	0	LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
316	0	"%s: unable to copy Unicode character from UTF-8 string.",
317	0	function );
318
319	0	return( -1 );
320	0	}
321		/* Convert the Unicode character into UTF-16 stream bytes
322		*/
323	0	if( libuna_unicode_character_copy_to_utf16_stream(
324	0	unicode_character,
325	0	utf16_stream,
326	0	utf16_stream_size,
327	0	&utf16_stream_index,
328	0	byte_order,
329	0	error ) != 1 )
330	0	{
331	0	libcerror_error_set(
332	0	error,
333	0	LIBCERROR_ERROR_DOMAIN_CONVERSION,
334	0	LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
335	0	"%s: unable to copy Unicode character to UTF-16 stream.",
336	0	function );
337
338	0	return( -1 );
339	0	}
340	0	if( unicode_character == 0 )
341	0	{
342	0	break;
343	0	}
344	0	}
345	0	return( 1 );
346	0	}
347
348		/* Determines the size of an UTF-16 stream from an UTF-16 string
349		* Returns 1 if successful or -1 on error
350		*/
351		int libuna_utf16_stream_size_from_utf16(
352		const libuna_utf16_character_t *utf16_string,
353		size_t utf16_string_size,
354		size_t *utf16_stream_size,
355		libcerror_error_t **error )
356	0	{
357	0	static char *function = "libuna_utf16_stream_size_from_utf16";
358	0	libuna_unicode_character_t unicode_character = 0;
359	0	size_t safe_utf16_stream_size = 0;
360	0	size_t utf16_string_index = 0;
361
362	0	if( utf16_string == NULL )
363	0	{
364	0	libcerror_error_set(
365	0	error,
366	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
367	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
368	0	"%s: invalid UTF-16 string.",
369	0	function );
370
371	0	return( -1 );
372	0	}
373	0	if( utf16_string_size > (size_t) SSIZE_MAX )
374	0	{
375	0	libcerror_error_set(
376	0	error,
377	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
378	0	LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
379	0	"%s: invalid UTF-16 string size value exceeds maximum.",
380	0	function );
381
382	0	return( -1 );
383	0	}
384	0	if( utf16_stream_size == NULL )
385	0	{
386	0	libcerror_error_set(
387	0	error,
388	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
389	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
390	0	"%s: invalid UTF-16 stream size.",
391	0	function );
392
393	0	return( -1 );
394	0	}
395		/* Add the byte order mark
396		*/
397	0	safe_utf16_stream_size = 1;
398
399	0	while( utf16_string_index < utf16_string_size )
400	0	{
401		/* Convert the UTF-16 character bytes into an Unicode character
402		*/
403	0	if( libuna_unicode_character_copy_from_utf16(
404	0	&unicode_character,
405	0	utf16_string,
406	0	utf16_string_size,
407	0	&utf16_string_index,
408	0	error ) != 1 )
409	0	{
410	0	libcerror_error_set(
411	0	error,
412	0	LIBCERROR_ERROR_DOMAIN_CONVERSION,
413	0	LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
414	0	"%s: unable to copy Unicode character from UTF-16.",
415	0	function );
416
417	0	return( -1 );
418	0	}
419		/* Determine how many UTF-16 character bytes are required
420		*/
421	0	if( libuna_unicode_character_size_to_utf16(
422	0	unicode_character,
423	0	&safe_utf16_stream_size,
424	0	error ) != 1 )
425	0	{
426	0	libcerror_error_set(
427	0	error,
428	0	LIBCERROR_ERROR_DOMAIN_CONVERSION,
429	0	LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
430	0	"%s: unable to determine size of Unicode character in UTF-16.",
431	0	function );
432
433	0	return( -1 );
434	0	}
435	0	if( unicode_character == 0 )
436	0	{
437	0	break;
438	0	}
439	0	}
440		/* Convert the number of characters into bytes
441		*/
442	0	utf16_stream_size = safe_utf16_stream_size 2;
443
444	0	return( 1 );
445	0	}
446
447		/* Copies an UTF-16 stream from an UTF-16 string
448		* Returns 1 if successful or -1 on error
449		*/
450		int libuna_utf16_stream_copy_from_utf16(
451		uint8_t *utf16_stream,
452		size_t utf16_stream_size,
453		int byte_order,
454		const libuna_utf16_character_t *utf16_string,
455		size_t utf16_string_size,
456		libcerror_error_t **error )
457	0	{
458	0	static char *function = "libuna_utf16_stream_copy_from_utf16";
459	0	libuna_unicode_character_t unicode_character = 0;
460	0	size_t utf16_stream_index = 0;
461	0	size_t utf16_string_index = 0;
462
463	0	if( utf16_stream == NULL )
464	0	{
465	0	libcerror_error_set(
466	0	error,
467	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
468	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
469	0	"%s: invalid UTF-16 stream.",
470	0	function );
471
472	0	return( -1 );
473	0	}
474	0	if( utf16_stream_size > (size_t) SSIZE_MAX )
475	0	{
476	0	libcerror_error_set(
477	0	error,
478	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
479	0	LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
480	0	"%s: invalid UTF-16 stream size value exceeds maximum.",
481	0	function );
482
483	0	return( -1 );
484	0	}
485	0	if( ( byte_order != LIBUNA_ENDIAN_BIG )
486	0	&& ( byte_order != LIBUNA_ENDIAN_LITTLE ) )
487	0	{
488	0	libcerror_error_set(
489	0	error,
490	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
491	0	LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE,
492	0	"%s: unsupported byte order.",
493	0	function );
494
495	0	return( -1 );
496	0	}
497	0	if( utf16_string == NULL )
498	0	{
499	0	libcerror_error_set(
500	0	error,
501	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
502	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
503	0	"%s: invalid UTF-16 string.",
504	0	function );
505
506	0	return( -1 );
507	0	}
508	0	if( utf16_string_size > (size_t) SSIZE_MAX )
509	0	{
510	0	libcerror_error_set(
511	0	error,
512	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
513	0	LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
514	0	"%s: invalid UTF-16 string size value exceeds maximum.",
515	0	function );
516
517	0	return( -1 );
518	0	}
519	0	if( libuna_utf16_stream_copy_byte_order_mark(
520	0	utf16_stream,
521	0	utf16_stream_size,
522	0	&utf16_stream_index,
523	0	byte_order,
524	0	error ) != 1 )
525	0	{
526	0	libcerror_error_set(
527	0	error,
528	0	LIBCERROR_ERROR_DOMAIN_CONVERSION,
529	0	LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
530	0	"%s: unable to copy UTF-16 byte order mark.",
531	0	function );
532
533	0	return( -1 );
534	0	}
535	0	while( utf16_string_index < utf16_string_size )
536	0	{
537		/* Convert the UTF-16 string bytes into an Unicode character
538		*/
539	0	if( libuna_unicode_character_copy_from_utf16(
540	0	&unicode_character,
541	0	utf16_string,
542	0	utf16_string_size,
543	0	&utf16_string_index,
544	0	error ) != 1 )
545	0	{
546	0	libcerror_error_set(
547	0	error,
548	0	LIBCERROR_ERROR_DOMAIN_CONVERSION,
549	0	LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
550	0	"%s: unable to copy Unicode character from UTF-16 string.",
551	0	function );
552
553	0	return( -1 );
554	0	}
555		/* Convert the Unicode character into UTF-16 stream bytes
556		*/
557	0	if( libuna_unicode_character_copy_to_utf16_stream(
558	0	unicode_character,
559	0	utf16_stream,
560	0	utf16_stream_size,
561	0	&utf16_stream_index,
562	0	byte_order,
563	0	error ) != 1 )
564	0	{
565	0	libcerror_error_set(
566	0	error,
567	0	LIBCERROR_ERROR_DOMAIN_CONVERSION,
568	0	LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
569	0	"%s: unable to copy Unicode character to UTF-16 stream.",
570	0	function );
571
572	0	return( -1 );
573	0	}
574	0	if( unicode_character == 0 )
575	0	{
576	0	break;
577	0	}
578	0	}
579	0	return( 1 );
580	0	}
581
582		/* Determines the size of an UTF-16 stream from an UTF-32 string
583		* Returns 1 if successful or -1 on error
584		*/
585		int libuna_utf16_stream_size_from_utf32(
586		const libuna_utf32_character_t *utf32_string,
587		size_t utf32_string_size,
588		size_t *utf16_stream_size,
589		libcerror_error_t **error )
590	0	{
591	0	static char *function = "libuna_utf16_stream_size_from_utf32";
592	0	libuna_unicode_character_t unicode_character = 0;
593	0	size_t safe_utf16_stream_size = 0;
594	0	size_t utf32_string_index = 0;
595
596	0	if( utf32_string == NULL )
597	0	{
598	0	libcerror_error_set(
599	0	error,
600	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
601	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
602	0	"%s: invalid UTF-32 string.",
603	0	function );
604
605	0	return( -1 );
606	0	}
607	0	if( utf32_string_size > (size_t) SSIZE_MAX )
608	0	{
609	0	libcerror_error_set(
610	0	error,
611	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
612	0	LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
613	0	"%s: invalid UTF-32 string size value exceeds maximum.",
614	0	function );
615
616	0	return( -1 );
617	0	}
618	0	if( utf16_stream_size == NULL )
619	0	{
620	0	libcerror_error_set(
621	0	error,
622	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
623	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
624	0	"%s: invalid UTF-16 stream size.",
625	0	function );
626
627	0	return( -1 );
628	0	}
629		/* Add the byte order mark
630		*/
631	0	safe_utf16_stream_size += 1;
632
633	0	while( utf32_string_index < utf32_string_size )
634	0	{
635		/* Convert the UTF-32 character bytes into an Unicode character
636		*/
637	0	if( libuna_unicode_character_copy_from_utf32(
638	0	&unicode_character,
639	0	utf32_string,
640	0	utf32_string_size,
641	0	&utf32_string_index,
642	0	error ) != 1 )
643	0	{
644	0	libcerror_error_set(
645	0	error,
646	0	LIBCERROR_ERROR_DOMAIN_CONVERSION,
647	0	LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
648	0	"%s: unable to copy Unicode character from UTF-32.",
649	0	function );
650
651	0	return( -1 );
652	0	}
653		/* Determine how many UTF-16 character bytes are required
654		*/
655	0	if( libuna_unicode_character_size_to_utf16(
656	0	unicode_character,
657	0	&safe_utf16_stream_size,
658	0	error ) != 1 )
659	0	{
660	0	libcerror_error_set(
661	0	error,
662	0	LIBCERROR_ERROR_DOMAIN_CONVERSION,
663	0	LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
664	0	"%s: unable to determine size of Unicode character in UTF-16.",
665	0	function );
666
667	0	return( -1 );
668	0	}
669	0	if( unicode_character == 0 )
670	0	{
671	0	break;
672	0	}
673	0	}
674		/* Convert the number of characters into bytes
675		*/
676	0	utf16_stream_size = safe_utf16_stream_size 2;
677
678	0	return( 1 );
679	0	}
680
681		/* Copies an UTF-16 stream from an UTF-32 string
682		* Returns 1 if successful or -1 on error
683		*/
684		int libuna_utf16_stream_copy_from_utf32(
685		uint8_t *utf16_stream,
686		size_t utf16_stream_size,
687		int byte_order,
688		const libuna_utf32_character_t *utf32_string,
689		size_t utf32_string_size,
690		libcerror_error_t **error )
691	0	{
692	0	static char *function = "libuna_utf16_stream_copy_from_utf32";
693	0	libuna_unicode_character_t unicode_character = 0;
694	0	size_t utf16_stream_index = 0;
695	0	size_t utf32_string_index = 0;
696
697	0	if( utf16_stream == NULL )
698	0	{
699	0	libcerror_error_set(
700	0	error,
701	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
702	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
703	0	"%s: invalid UTF-16 stream.",
704	0	function );
705
706	0	return( -1 );
707	0	}
708	0	if( utf16_stream_size > (size_t) SSIZE_MAX )
709	0	{
710	0	libcerror_error_set(
711	0	error,
712	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
713	0	LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
714	0	"%s: invalid UTF-16 stream size value exceeds maximum.",
715	0	function );
716
717	0	return( -1 );
718	0	}
719	0	if( ( byte_order != LIBUNA_ENDIAN_BIG )
720	0	&& ( byte_order != LIBUNA_ENDIAN_LITTLE ) )
721	0	{
722	0	libcerror_error_set(
723	0	error,
724	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
725	0	LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE,
726	0	"%s: unsupported byte order.",
727	0	function );
728
729	0	return( -1 );
730	0	}
731	0	if( utf32_string == NULL )
732	0	{
733	0	libcerror_error_set(
734	0	error,
735	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
736	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
737	0	"%s: invalid UTF-32 string.",
738	0	function );
739
740	0	return( -1 );
741	0	}
742	0	if( utf32_string_size > (size_t) SSIZE_MAX )
743	0	{
744	0	libcerror_error_set(
745	0	error,
746	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
747	0	LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
748	0	"%s: invalid UTF-32 string size value exceeds maximum.",
749	0	function );
750
751	0	return( -1 );
752	0	}
753	0	if( libuna_utf16_stream_copy_byte_order_mark(
754	0	utf16_stream,
755	0	utf16_stream_size,
756	0	&utf16_stream_index,
757	0	byte_order,
758	0	error ) != 1 )
759	0	{
760	0	libcerror_error_set(
761	0	error,
762	0	LIBCERROR_ERROR_DOMAIN_CONVERSION,
763	0	LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
764	0	"%s: unable to copy UTF-16 byte order mark.",
765	0	function );
766
767	0	return( -1 );
768	0	}
769	0	while( utf32_string_index < utf32_string_size )
770	0	{
771		/* Convert the UTF-32 string bytes into an Unicode character
772		*/
773	0	if( libuna_unicode_character_copy_from_utf32(
774	0	&unicode_character,
775	0	utf32_string,
776	0	utf32_string_size,
777	0	&utf32_string_index,
778	0	error ) != 1 )
779	0	{
780	0	libcerror_error_set(
781	0	error,
782	0	LIBCERROR_ERROR_DOMAIN_CONVERSION,
783	0	LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
784	0	"%s: unable to copy Unicode character from UTF-32 string.",
785	0	function );
786
787	0	return( -1 );
788	0	}
789		/* Convert the Unicode character into UTF-16 stream bytes
790		*/
791	0	if( libuna_unicode_character_copy_to_utf16_stream(
792	0	unicode_character,
793	0	utf16_stream,
794	0	utf16_stream_size,
795	0	&utf16_stream_index,
796	0	byte_order,
797	0	error ) != 1 )
798	0	{
799	0	libcerror_error_set(
800	0	error,
801	0	LIBCERROR_ERROR_DOMAIN_CONVERSION,
802	0	LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
803	0	"%s: unable to copy Unicode character to UTF-16 stream.",
804	0	function );
805
806	0	return( -1 );
807	0	}
808	0	if( unicode_character == 0 )
809	0	{
810	0	break;
811	0	}
812	0	}
813	0	return( 1 );
814	0	}
815