/*
 * UTF-16 string functions
 *
 * Copyright (C) 2008-2017, Joachim Metz <joachim.metz@gmail.com>
 *
 * Refer to AUTHORS for acknowledgements.
 *
 * This software 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 software 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 software.  If not, see <http://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_string.h"

/* Determines the size of an UTF-16 string from a byte stream
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_string_size_from_byte_stream(
     const uint8_t *byte_stream,
     size_t byte_stream_size,
     int codepage,
     size_t *utf16_string_size,
     libcerror_error_t **error )
{
	static char *function                        = "libuna_utf16_string_size_from_byte_stream";
	size_t byte_stream_index                     = 0;
	libuna_unicode_character_t unicode_character = 0;

	if( byte_stream == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid byte stream.",
		 function );

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

		return( -1 );
	}
	if( utf16_string_size == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-16 string size.",
		 function );

		return( -1 );
	}
	*utf16_string_size = 0;

	/* Check if the byte stream is terminated with a zero byte
	 */
	if( byte_stream[ byte_stream_size - 1 ] != 0 )
	{
		*utf16_string_size += 1;
	}
	while( byte_stream_index < byte_stream_size )
	{
		/* Convert the byte stream bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_byte_stream(
		     &unicode_character,
		     byte_stream,
		     byte_stream_size,
		     &byte_stream_index,
		     codepage,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
			 "%s: unable to copy Unicode character from byte stream.",
			 function );

			return( -1 );
		}
		/* Determine how many UTF-16 character byte words are required
		 */
		if( libuna_unicode_character_size_to_utf16(
		     unicode_character,
		     utf16_string_size,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
			 "%s: unable to unable to determine size of Unicode character in UTF-16.",
			 function );

			return( -1 );
		}
	}
	return( 1 );
}

/* Copies an UTF-16 string from a byte stream
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_string_copy_from_byte_stream(
     libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     const uint8_t *byte_stream,
     size_t byte_stream_size,
     int codepage,
     libcerror_error_t **error )
{
	static char *function     = "libuna_utf16_string_copy_from_byte_stream";
	size_t utf16_string_index = 0;

	if( libuna_utf16_string_with_index_copy_from_byte_stream(
	     utf16_string,
	     utf16_string_size,
	     &utf16_string_index,
	     byte_stream,
	     byte_stream_size,
	     codepage,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_COPY_FAILED,
		 "%s: unable to copy byte stream to UTF-16 string.",
		 function );

		return( -1 );
	}
	return( 1 );
}

/* Copies an UTF-16 string from a byte stream
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_string_with_index_copy_from_byte_stream(
     libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     size_t *utf16_string_index,
     const uint8_t *byte_stream,
     size_t byte_stream_size,
     int codepage,
     libcerror_error_t **error )
{
	static char *function                        = "libuna_utf16_string_with_index_copy_from_byte_stream";
	size_t byte_stream_index                     = 0;
	libuna_unicode_character_t unicode_character = 0;
	uint8_t zero_byte                            = 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_string_index == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-16 string index.",
		 function );

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

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

		return( -1 );
	}
	/* Check if the byte stream is terminated with zero bytes
	 */
	if( byte_stream[ byte_stream_size - 1 ] != 0 )
	{
		zero_byte = 1;
	}
	while( byte_stream_index < byte_stream_size )
	{
		/* Convert the byte stream bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_byte_stream(
		     &unicode_character,
		     byte_stream,
		     byte_stream_size,
		     &byte_stream_index,
		     codepage,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
			 "%s: unable to copy Unicode character from byte stream.",
			 function );

			return( -1 );
		}
		/* Convert the Unicode character into UTF-16 character byte words
		 */
		if( libuna_unicode_character_copy_to_utf16(
		     unicode_character,
		     utf16_string,
		     utf16_string_size,
		     utf16_string_index,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
			 "%s: unable to copy Unicode character to UTF-16.",
			 function );

			return( -1 );
		}
	}
	if( zero_byte != 0 )
	{
		if( *utf16_string_index >= utf16_string_size )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
			 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
			 "%s: UTF-16 string too small.",
			 function );

			return( -1 );
		}
		utf16_string[ *utf16_string_index ] = 0;

		*utf16_string_index += 1;
	}
	return( 1 );
}

/* Compares an UTF-16 string with a byte stream
 * Returns 1 if the strings are equal, 0 if not or -1 on error
 */
int libuna_utf16_string_compare_with_byte_stream(
     const libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     const uint8_t *byte_stream,
     size_t byte_stream_size,
     int codepage,
     libcerror_error_t **error )
{
	static char *function                                    = "libuna_utf16_string_compare_with_byte_stream";
	size_t byte_stream_index                                 = 0;
	size_t utf16_string_index                                = 0;
	libuna_unicode_character_t utf16_unicode_character       = 0;
	libuna_unicode_character_t byte_stream_unicode_character = 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( byte_stream == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid byte stream.",
		 function );

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

		return( -1 );
	}
	if( utf16_string[ utf16_string_size - 1 ] == 0 )
	{
		utf16_string_size -= 1;
	}
	/* Check if the byte stream is terminated with zero bytes
	 */
	if( byte_stream[ byte_stream_size - 1 ] == 0 )
	{
		byte_stream_size -= 1;
	}
	while( ( utf16_string_index < utf16_string_size )
	    && ( byte_stream_index < byte_stream_size ) )
	{
		/* Convert the UTF-16 character bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_utf16(
		     &utf16_unicode_character,
		     utf16_string,
		     utf16_string_size,
		     &utf16_string_index,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
			 "%s: unable to copy Unicode character from UTF-16.",
			 function );

			return( -1 );
		}
		/* Convert the byte stream bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_byte_stream(
		     &byte_stream_unicode_character,
		     byte_stream,
		     byte_stream_size,
		     &byte_stream_index,
		     codepage,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
			 "%s: unable to copy Unicode character from byte stream.",
			 function );

			return( -1 );
		}
		if( utf16_unicode_character != byte_stream_unicode_character )
		{
			return( 0 );
		}
	}
	/* Check if both strings were entirely processed
	 */
	if( ( utf16_string_index != utf16_string_size )
	 || ( byte_stream_index != byte_stream_size ) )
	{
		return( 0 );
	}
	return( 1 );
}

/* Determines the size of an UTF-16 string from an UTF-7 stream
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_string_size_from_utf7_stream(
     const uint8_t *utf7_stream,
     size_t utf7_stream_size,
     size_t *utf16_string_size,
     libcerror_error_t **error )
{
	static char *function                        = "libuna_utf16_string_size_from_utf7_stream";
	size_t utf7_stream_index                     = 0;
	libuna_unicode_character_t unicode_character = 0;
	uint32_t utf7_stream_base64_data             = 0;

	if( utf7_stream == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-7 stream.",
		 function );

		return( -1 );
	}
	if( utf7_stream_size > (size_t) SSIZE_MAX )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
		 "%s: invalid UTF-7 stream size value exceeds maximum.",
		 function );

		return( -1 );
	}
	if( utf7_stream_size < 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
		 "%s: missing UTF-7 stream bytes.",
		 function );

		return( -1 );
	}
	if( utf16_string_size == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-16 string size.",
		 function );

		return( -1 );
	}
	*utf16_string_size = 0;

	/* Check if the UTF-7 stream is terminated with a zero byte
	 */
	if( utf7_stream[ utf7_stream_size - 1 ] != 0 )
	{
		*utf16_string_size += 1;
	}
	while( utf7_stream_index < utf7_stream_size )
	{
		/* Convert the UTF-7 stream bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_utf7_stream(
		     &unicode_character,
		     utf7_stream,
		     utf7_stream_size,
		     &utf7_stream_index,
		     &utf7_stream_base64_data,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
			 "%s: unable to copy Unicode character from UTF-7 stream.",
			 function );

			return( -1 );
		}
		/* Determine how many UTF-16 character bytes are required
		 */
		if( libuna_unicode_character_size_to_utf16(
		     unicode_character,
		     utf16_string_size,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
			 "%s: unable to unable to determine size of Unicode character in UTF-16.",
			 function );

			return( -1 );
		}
	}
	return( 1 );
}

/* Copies an UTF-16 string from an UTF-7 stream
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_string_copy_from_utf7_stream(
     libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     const uint8_t *utf7_stream,
     size_t utf7_stream_size,
     libcerror_error_t **error )
{
	static char *function     = "libuna_utf16_string_copy_from_utf7_stream";
	size_t utf16_string_index = 0;

	if( libuna_utf16_string_with_index_copy_from_utf7_stream(
	     utf16_string,
	     utf16_string_size,
	     &utf16_string_index,
	     utf7_stream,
	     utf7_stream_size,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_COPY_FAILED,
		 "%s: unable to UTF-7 stream to UTF-16 string.",
		 function );

		return( -1 );
	}
	return( 1 );
}

/* Copies an UTF-16 string from an UTF-7 stream
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_string_with_index_copy_from_utf7_stream(
     libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     size_t *utf16_string_index,
     const uint8_t *utf7_stream,
     size_t utf7_stream_size,
     libcerror_error_t **error )
{
	static char *function                        = "libuna_utf16_string_with_index_copy_from_utf7_stream";
	size_t utf7_stream_index                     = 0;
	libuna_unicode_character_t unicode_character = 0;
	uint32_t utf7_stream_base64_data             = 0;
	uint8_t zero_byte                            = 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_string_index == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-16 string index.",
		 function );

		return( -1 );
	}
	if( utf7_stream == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-7 stream.",
		 function );

		return( -1 );
	}
	if( utf7_stream_size > (size_t) SSIZE_MAX )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
		 "%s: invalid UTF-7 stream size value exceeds maximum.",
		 function );

		return( -1 );
	}
	if( utf7_stream_size < 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
		 "%s: missing UTF-7 stream bytes.",
		 function );

		return( -1 );
	}
	/* Check if the UTF-7 stream is terminated with zero bytes
	 */
	if( utf7_stream[ utf7_stream_size - 1 ] != 0 )
	{
		zero_byte = 1;
	}
	while( utf7_stream_index < utf7_stream_size )
	{
		/* Convert the UTF-7 stream bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_utf7_stream(
		     &unicode_character,
		     utf7_stream,
		     utf7_stream_size,
		     &utf7_stream_index,
		     &utf7_stream_base64_data,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
			 "%s: unable to copy Unicode character from UTF-7 stream.",
			 function );

			return( -1 );
		}
		/* Convert the Unicode character into UTF-16 character bytes
		 */
		if( libuna_unicode_character_copy_to_utf16(
		     unicode_character,
		     utf16_string,
		     utf16_string_size,
		     utf16_string_index,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
			 "%s: unable to copy Unicode character to UTF-16.",
			 function );

			return( -1 );
		}
	}
	if( zero_byte != 0 )
	{
		if( *utf16_string_index >= utf16_string_size )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
			 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
			 "%s: UTF-16 string too small.",
			 function );

			return( -1 );
		}
		utf16_string[ *utf16_string_index ] = 0;

		*utf16_string_index += 1;
	}
	return( 1 );
}

/* Compares an UTF-16 string with an UTF-7 stream
 * Returns 1 if the strings are equal, 0 if not or -1 on error
 */
int libuna_utf16_string_compare_with_utf7_stream(
     const libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     const uint8_t *utf7_stream,
     size_t utf7_stream_size,
     libcerror_error_t **error )
{
	static char *function                                    = "libuna_utf16_string_compare_with_utf7_stream";
	size_t utf16_string_index                                = 0;
	size_t utf7_stream_index                                 = 0;
	libuna_unicode_character_t utf16_unicode_character       = 0;
	libuna_unicode_character_t utf7_stream_unicode_character = 0;
	uint32_t utf7_stream_base64_data                         = 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( utf7_stream == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-7 stream.",
		 function );

		return( -1 );
	}
	if( utf7_stream_size > (size_t) SSIZE_MAX )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
		 "%s: invalid UTF-7 stream size value exceeds maximum.",
		 function );

		return( -1 );
	}
	if( utf7_stream_size < 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
		 "%s: missing UTF-7 stream bytes.",
		 function );

		return( -1 );
	}
	if( utf16_string[ utf16_string_size - 1 ] == 0 )
	{
		utf16_string_size -= 1;
	}
	/* Check if the UTF-7 stream is terminated with zero bytes
	 */
	if( utf7_stream[ utf7_stream_size - 1 ] == 0 )
	{
		utf7_stream_size -= 1;
	}
	while( ( utf16_string_index < utf16_string_size )
	    && ( utf7_stream_index < utf7_stream_size ) )
	{
		/* Convert the UTF-16 character bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_utf16(
		     &utf16_unicode_character,
		     utf16_string,
		     utf16_string_size,
		     &utf16_string_index,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
			 "%s: unable to copy Unicode character from UTF-16.",
			 function );

			return( -1 );
		}
		/* Convert the UTF-7 character bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_utf7_stream(
		     &utf7_stream_unicode_character,
		     utf7_stream,
		     utf7_stream_size,
		     &utf7_stream_index,
		     &utf7_stream_base64_data,
                     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
			 "%s: unable to copy Unicode character from UTF-7 stream.",
			 function );

			return( -1 );
		}
		if( utf16_unicode_character != utf7_stream_unicode_character )
		{
			return( 0 );
		}
	}
	/* Check if both strings were entirely processed
	 */
	if( ( utf16_string_index != utf16_string_size )
	 || ( utf7_stream_index != utf7_stream_size ) )
	{
		return( 0 );
	}
	return( 1 );
}

/* Determines the size of an UTF-16 string from an UTF-8 string
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_string_size_from_utf8(
     const libuna_utf8_character_t *utf8_string,
     size_t utf8_string_size,
     size_t *utf16_string_size,
     libcerror_error_t **error )
{
	static char *function                        = "libuna_utf16_string_size_from_utf8";
	size_t utf8_string_index                     = 0;
	libuna_unicode_character_t unicode_character = 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_string_size == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-16 string size.",
		 function );

		return( -1 );
	}
	*utf16_string_size = 0;

	while( utf8_string_index < utf8_string_size )
	{
		/* Convert the UTF-8 character bytes into a 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,
		    utf16_string_size,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
			 "%s: unable to unable to determine size of Unicode character in UTF-16.",
			 function );

			return( -1 );
		}
	}
	return( 1 );
}

/* Copies an UTF-16 string from an UTF-8 string
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_string_copy_from_utf8(
     libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     const libuna_utf8_character_t *utf8_string,
     size_t utf8_string_size,
     libcerror_error_t **error )
{
	static char *function     = "libuna_utf16_string_copy_from_utf8";
	size_t utf16_string_index = 0;

	if( libuna_utf16_string_with_index_copy_from_utf8(
	     utf16_string,
	     utf16_string_size,
	     &utf16_string_index,
	     utf8_string,
	     utf8_string_size,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_COPY_FAILED,
		 "%s: unable to copy UTF-8 string to UTF-16 string.",
		 function );

		return( -1 );
	}
	return( 1 );
}

/* Copies an UTF-16 string from an UTF-8 string
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_string_with_index_copy_from_utf8(
     libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     size_t *utf16_string_index,
     const libuna_utf8_character_t *utf8_string,
     size_t utf8_string_size,
     libcerror_error_t **error )
{
	static char *function                        = "libuna_utf16_string_with_index_copy_from_utf8";
	size_t utf8_string_index                     = 0;
	libuna_unicode_character_t unicode_character = 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_string_index == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-16 string index.",
		 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 );
	}
	while( utf8_string_index < utf8_string_size )
	{
		/* Convert the UTF-8 character bytes into a 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 );
		}
		/* Convert the Unicode character into UTF-16 character bytes
		 */
		if( libuna_unicode_character_copy_to_utf16(
		     unicode_character,
		     utf16_string,
		     utf16_string_size,
		     utf16_string_index,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
			 "%s: unable to copy Unicode character to UTF-16.",
			 function );

			return( -1 );
		}
	}
	return( 1 );
}

/* Determines the size of an UTF-16 string from an UTF-8 stream
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_string_size_from_utf8_stream(
     const uint8_t *utf8_stream,
     size_t utf8_stream_size,
     size_t *utf16_string_size,
     libcerror_error_t **error )
{
	static char *function                        = "libuna_utf16_string_size_from_utf8_stream";
	size_t utf8_stream_index                     = 0;
	libuna_unicode_character_t unicode_character = 0;

	if( utf8_stream == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-8 stream.",
		 function );

		return( -1 );
	}
	if( utf8_stream_size > (size_t) SSIZE_MAX )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
		 "%s: invalid UTF-8 stream size value exceeds maximum.",
		 function );

		return( -1 );
	}
	if( utf8_stream_size < 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
		 "%s: missing UTF-8 stream bytes.",
		 function );

		return( -1 );
	}
	if( utf16_string_size == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-16 string size.",
		 function );

		return( -1 );
	}
	*utf16_string_size = 0;

	/* Check if UTF-8 stream starts with a byte order mark (BOM)
	 */
	if( utf8_stream_size >= 3 )
	{
		if( ( utf8_stream[ 0 ] == 0x0ef )
		 && ( utf8_stream[ 1 ] == 0x0bb )
		 && ( utf8_stream[ 2 ] == 0x0bf ) )
		{
			utf8_stream_index += 3;
		}
	}
	/* Check if the UTF-8 stream is terminated with a zero byte
	 */
	if( utf8_stream[ utf8_stream_size - 1 ] != 0 )
	{
		*utf16_string_size += 1;
	}
	while( utf8_stream_index < utf8_stream_size )
	{
		/* Convert the UTF-8 stream bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_utf8(
		     &unicode_character,
		     utf8_stream,
		     utf8_stream_size,
		     &utf8_stream_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 stream.",
			 function );

			return( -1 );
		}
		/* Determine how many UTF-16 character bytes are required
		 */
		if( libuna_unicode_character_size_to_utf16(
		     unicode_character,
		     utf16_string_size,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
			 "%s: unable to unable to determine size of Unicode character in UTF-16.",
			 function );

			return( -1 );
		}
	}
	return( 1 );
}

/* Copies an UTF-16 string from an UTF-8 stream
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_string_copy_from_utf8_stream(
     libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     const uint8_t *utf8_stream,
     size_t utf8_stream_size,
     libcerror_error_t **error )
{
	static char *function     = "libuna_utf16_string_copy_from_utf8_stream";
	size_t utf16_string_index = 0;

	if( libuna_utf16_string_with_index_copy_from_utf8_stream(
	     utf16_string,
	     utf16_string_size,
	     &utf16_string_index,
	     utf8_stream,
	     utf8_stream_size,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_COPY_FAILED,
		 "%s: unable to UTF-8 stream to UTF-16 string.",
		 function );

		return( -1 );
	}
	return( 1 );
}

/* Copies an UTF-16 string from an UTF-8 stream
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_string_with_index_copy_from_utf8_stream(
     libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     size_t *utf16_string_index,
     const uint8_t *utf8_stream,
     size_t utf8_stream_size,
     libcerror_error_t **error )
{
	static char *function                        = "libuna_utf16_string_with_index_copy_from_utf8_stream";
	size_t utf8_stream_index                     = 0;
	libuna_unicode_character_t unicode_character = 0;
	uint8_t zero_byte                            = 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_string_index == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-16 string index.",
		 function );

		return( -1 );
	}
	if( utf8_stream == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-8 stream.",
		 function );

		return( -1 );
	}
	if( utf8_stream_size > (size_t) SSIZE_MAX )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
		 "%s: invalid UTF-8 stream size value exceeds maximum.",
		 function );

		return( -1 );
	}
	if( utf8_stream_size < 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
		 "%s: missing UTF-8 stream bytes.",
		 function );

		return( -1 );
	}
	/* Check if UTF-8 stream starts with a byte order mark (BOM)
	 */
	if( utf8_stream_size >= 3 )
	{
		if( ( utf8_stream[ 0 ] == 0x0ef )
		 && ( utf8_stream[ 1 ] == 0x0bb )
		 && ( utf8_stream[ 2 ] == 0x0bf ) )
		{
			utf8_stream_index += 3;
		}
	}
	/* Check if the UTF-8 stream is terminated with zero bytes
	 */
	if( utf8_stream[ utf8_stream_size - 1 ] != 0 )
	{
		zero_byte = 1;
	}
	while( utf8_stream_index < utf8_stream_size )
	{
		/* Convert the UTF-8 stream bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_utf8(
		     &unicode_character,
		     utf8_stream,
		     utf8_stream_size,
		     &utf8_stream_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 stream.",
			 function );

			return( -1 );
		}
		/* Convert the Unicode character into UTF-16 character bytes
		 */
		if( libuna_unicode_character_copy_to_utf16(
		     unicode_character,
		     utf16_string,
		     utf16_string_size,
		     utf16_string_index,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
			 "%s: unable to copy Unicode character to UTF-16.",
			 function );

			return( -1 );
		}
	}
	if( zero_byte != 0 )
	{
		if( *utf16_string_index >= utf16_string_size )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
			 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
			 "%s: UTF-16 string too small.",
			 function );

			return( -1 );
		}
		utf16_string[ *utf16_string_index ] = 0;

		*utf16_string_index += 1;
	}
	return( 1 );
}

/* Compares an UTF-16 string with an UTF-8 stream
 * Returns 1 if the strings are equal, 0 if not or -1 on error
 */
int libuna_utf16_string_compare_with_utf8_stream(
     const libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     const uint8_t *utf8_stream,
     size_t utf8_stream_size,
     libcerror_error_t **error )
{
	static char *function                                    = "libuna_utf16_string_compare_with_utf8_stream";
	size_t utf16_string_index                                = 0;
	size_t utf8_stream_index                                 = 0;
	libuna_unicode_character_t utf16_unicode_character       = 0;
	libuna_unicode_character_t utf8_stream_unicode_character = 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( utf8_stream == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-8 stream.",
		 function );

		return( -1 );
	}
	if( utf8_stream_size > (size_t) SSIZE_MAX )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
		 "%s: invalid UTF-8 stream size value exceeds maximum.",
		 function );

		return( -1 );
	}
	if( utf8_stream_size < 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
		 "%s: missing UTF-8 stream bytes.",
		 function );

		return( -1 );
	}
	/* Check if UTF-8 stream starts with a byte order mark (BOM)
	 */
	if( utf8_stream_size >= 3 )
	{
		if( ( utf8_stream[ 0 ] == 0x0ef )
		 && ( utf8_stream[ 1 ] == 0x0bb )
		 && ( utf8_stream[ 2 ] == 0x0bf ) )
		{
			utf8_stream_index += 3;
		}
	}
	if( utf16_string[ utf16_string_size - 1 ] == 0 )
	{
		utf16_string_size -= 1;
	}
	/* Check if the UTF-8 stream is terminated with zero bytes
	 */
	if( utf8_stream[ utf8_stream_size - 1 ] == 0 )
	{
		utf8_stream_size -= 1;
	}
	while( ( utf16_string_index < utf16_string_size )
	    && ( utf8_stream_index < utf8_stream_size ) )
	{
		/* Convert the UTF-16 character bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_utf16(
		     &utf16_unicode_character,
		     utf16_string,
		     utf16_string_size,
		     &utf16_string_index,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
			 "%s: unable to copy Unicode character from UTF-16.",
			 function );

			return( -1 );
		}
		/* Convert the UTF-8 character bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_utf8(
		     &utf8_stream_unicode_character,
		     utf8_stream,
		     utf8_stream_size,
		     &utf8_stream_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 stream.",
			 function );

			return( -1 );
		}
		if( utf16_unicode_character != utf8_stream_unicode_character )
		{
			return( 0 );
		}
	}
	/* Check if both strings were entirely processed
	 */
	if( ( utf16_string_index != utf16_string_size )
	 || ( utf8_stream_index != utf8_stream_size ) )
	{
		return( 0 );
	}
	return( 1 );
}

/* Determines the size of an UTF-16 string from an UTF-16 stream
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_string_size_from_utf16_stream(
     const uint8_t *utf16_stream,
     size_t utf16_stream_size,
     int byte_order,
     size_t *utf16_string_size,
     libcerror_error_t **error )
{
	static char *function                        = "libuna_utf16_string_size_from_utf16_stream";
	size_t utf16_stream_index                    = 0;
	libuna_unicode_character_t unicode_character = 0;
	int read_byte_order                          = 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( ( utf16_stream_size < 2 )
	 || ( ( utf16_stream_size % 2 ) != 0 ) )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
		 "%s: missing UTF-16 stream bytes.",
		 function );

		return( -1 );
	}
	if( utf16_string_size == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-16 string size.",
		 function );

		return( -1 );
	}
	*utf16_string_size = 0;

	/* Check if UTF-16 stream is in big or little endian
	 */
	if( ( utf16_stream[ 0 ] == 0x0ff )
	 && ( utf16_stream[ 1 ] == 0x0fe ) )
	{
		read_byte_order    = LIBUNA_ENDIAN_LITTLE;
		utf16_stream_index = 2;
	}
	else if( ( utf16_stream[ 0 ] == 0x0fe )
	      && ( utf16_stream[ 1 ] == 0x0ff ) )
	{
		read_byte_order    = LIBUNA_ENDIAN_BIG;
		utf16_stream_index = 2;
	}
	if( byte_order == 0 )
	{
		byte_order = read_byte_order;
	}
	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 );
	}
	/* Check if the UTF-16 stream is terminated with zero bytes
	 */
	if( ( utf16_stream[ utf16_stream_size - 2 ] != 0 )
	 || ( utf16_stream[ utf16_stream_size - 1 ] != 0 ) )
	{
		*utf16_string_size += 1;
	}
	while( ( utf16_stream_index + 1 ) < utf16_stream_size )
	{
		/* Convert the UTF-16 stream bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_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_INPUT_FAILED,
			 "%s: unable to copy Unicode character from UTF-16 stream.",
			 function );

			return( -1 );
		}
		/* Determine how many UTF-16 character bytes are required
		 */
		if( libuna_unicode_character_size_to_utf16(
		     unicode_character,
		     utf16_string_size,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
			 "%s: unable to unable to determine size of Unicode character in UTF-16.",
			 function );

			return( -1 );
		}
	}
	if( utf16_stream_index != utf16_stream_size )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
		 "%s: missing UTF-16 stream bytes.",
		 function );

		return( -1 );
	}
	return( 1 );
}

/* Copies an UTF-16 string from an UTF-16 stream
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_string_copy_from_utf16_stream(
     libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     const uint8_t *utf16_stream,
     size_t utf16_stream_size,
     int byte_order,
     libcerror_error_t **error )
{
	static char *function     = "libuna_utf16_string_copy_from_utf16_stream";
	size_t utf16_string_index = 0;

	if( libuna_utf16_string_with_index_copy_from_utf16_stream(
	     utf16_string,
	     utf16_string_size,
	     &utf16_string_index,
	     utf16_stream,
	     utf16_stream_size,
	     byte_order,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_COPY_FAILED,
		 "%s: unable to copy UTF-16 stream to UTF-16 string.",
		 function );

		return( -1 );
	}
	return( 1 );
}

/* Copies an UTF-16 string from an UTF-16 stream
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_string_with_index_copy_from_utf16_stream(
     libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     size_t *utf16_string_index,
     const uint8_t *utf16_stream,
     size_t utf16_stream_size,
     int byte_order,
     libcerror_error_t **error )
{
	static char *function                        = "libuna_utf16_string_with_index_copy_from_utf16_stream";
	size_t utf16_stream_index                    = 0;
	libuna_unicode_character_t unicode_character = 0;
	uint8_t zero_byte                            = 0;
	int read_byte_order                          = 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_string_index == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-16 string index.",
		 function );

		return( -1 );
	}
	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_size < 2 )
	 || ( ( utf16_stream_size % 2 ) != 0 ) )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
		 "%s: missing UTF-16 stream bytes.",
		 function );

		return( -1 );
	}
	/* Check if UTF-16 stream is in big or little endian
	 */
	if( ( utf16_stream[ 0 ] == 0x0ff )
	 && ( utf16_stream[ 1 ] == 0x0fe ) )
	{
		read_byte_order    = LIBUNA_ENDIAN_LITTLE;
		utf16_stream_index = 2;
	}
	else if( ( utf16_stream[ 0 ] == 0x0fe )
	      && ( utf16_stream[ 1 ] == 0x0ff ) )
	{
		read_byte_order    = LIBUNA_ENDIAN_BIG;
		utf16_stream_index = 2;
	}
	if( byte_order == 0 )
	{
		byte_order = read_byte_order;
	}
	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 );
	}
	/* Check if the UTF-16 stream is terminated with zero bytes
	 */
	if( ( utf16_stream[ utf16_stream_size - 2 ] != 0 )
	 || ( utf16_stream[ utf16_stream_size - 1 ] != 0 ) )
	{
		zero_byte = 1;
	}
	while( ( utf16_stream_index + 1 ) < utf16_stream_size )
	{
		/* Convert the UTF-16 stream bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_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_INPUT_FAILED,
			 "%s: unable to copy Unicode character from UTF-16 stream.",
			 function );

			return( -1 );
		}
		/* Convert the Unicode character into UTF-16 character bytes
		 */
		if( libuna_unicode_character_copy_to_utf16(
		     unicode_character,
		     utf16_string,
		     utf16_string_size,
		     utf16_string_index,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
			 "%s: unable to copy Unicode character to UTF-16.",
			 function );

			return( -1 );
		}
	}
	if( utf16_stream_index != utf16_stream_size )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
		 "%s: missing UTF-16 stream bytes.",
		 function );

		return( -1 );
	}
	if( zero_byte != 0 )
	{
		if( *utf16_string_index >= utf16_string_size )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
			 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
			 "%s: UTF-16 string too small.",
			 function );

			return( -1 );
		}
		utf16_string[ *utf16_string_index ] = 0;

		*utf16_string_index += 1;
	}
	return( 1 );
}

/* Compares an UTF-16 string with an UTF-16 stream
 * Returns 1 if the strings are equal, 0 if not or -1 on error
 */
int libuna_utf16_string_compare_with_utf16_stream(
     const libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     const uint8_t *utf16_stream,
     size_t utf16_stream_size,
     int byte_order,
     libcerror_error_t **error )
{
	static char *function                                     = "libuna_utf16_string_compare_with_utf16_stream";
	size_t utf16_stream_index                                 = 0;
	size_t utf16_string_index                                 = 0;
	libuna_unicode_character_t utf16_unicode_character        = 0;
	libuna_unicode_character_t utf16_stream_unicode_character = 0;
	int read_byte_order                                       = 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 == 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_size < 2 )
	 || ( ( utf16_stream_size % 2 ) != 0 ) )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
		 "%s: missing UTF-16 stream bytes.",
		 function );

		return( -1 );
	}
	/* Check if UTF-16 stream is in big or little endian
	 */
	if( ( utf16_stream[ 0 ] == 0xfe )
	 && ( utf16_stream[ 1 ] == 0xff ) )
	{
		read_byte_order    = LIBUNA_ENDIAN_BIG;
		utf16_stream_index = 2;
	}
	else if( ( utf16_stream[ 0 ] == 0xff )
	      && ( utf16_stream[ 1 ] == 0xfe ) )
	{
		read_byte_order    = LIBUNA_ENDIAN_LITTLE;
		utf16_stream_index = 2;
	}
	if( byte_order == 0 )
	{
		byte_order = read_byte_order;
	}
	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[ utf16_string_size - 1 ] == 0 )
	{
		utf16_string_size -= 1;
	}
	/* Check if the UTF-16 stream is terminated with zero bytes
	 */
	if( ( utf16_stream[ utf16_stream_size - 2 ] == 0 )
	 && ( utf16_stream[ utf16_stream_size - 1 ] == 0 ) )
	{
		utf16_stream_size -= 2;
	}
	while( ( utf16_string_index < utf16_string_size )
	    && ( utf16_stream_index < utf16_stream_size ) )
	{
		/* Convert the UTF-16 character bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_utf16(
		     &utf16_unicode_character,
		     utf16_string,
		     utf16_string_size,
		     &utf16_string_index,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
			 "%s: unable to copy Unicode character from UTF-16.",
			 function );

			return( -1 );
		}
		/* Convert the UTF-16 stream bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_utf16_stream(
		     &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_INPUT_FAILED,
			 "%s: unable to copy Unicode character from UTF-16 stream.",
			 function );

			return( -1 );
		}
		if( utf16_unicode_character != utf16_stream_unicode_character )
		{
			return( 0 );
		}
	}
	/* Check if both strings were entirely processed
	 */
	if( ( utf16_string_index != utf16_string_size )
	 || ( utf16_stream_index != utf16_stream_size ) )
	{
		return( 0 );
	}
	return( 1 );
}

/* Determines the size of an UTF-16 string from an UTF-32 string
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_string_size_from_utf32(
     const libuna_utf32_character_t *utf32_string,
     size_t utf32_string_size,
     size_t *utf16_string_size,
     libcerror_error_t **error )
{
	static char *function                        = "libuna_utf16_string_size_from_utf32";
	size_t utf32_string_index                    = 0;
	libuna_unicode_character_t unicode_character = 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_string_size == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-16 string size.",
		 function );

		return( -1 );
	}
	*utf16_string_size = 0;

	while( utf32_string_index < utf32_string_size )
	{
		/* Convert the UTF-32 character bytes into a 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,
		     utf16_string_size,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
			 "%s: unable to unable to determine size of Unicode character in UTF-16.",
			 function );

			return( -1 );
		}
	}
	return( 1 );
}

/* Copies an UTF-16 string from an UTF-32 string
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_string_copy_from_utf32(
     libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     const libuna_utf32_character_t *utf32_string,
     size_t utf32_string_size,
     libcerror_error_t **error )
{
	static char *function     = "libuna_utf16_string_copy_from_utf32";
	size_t utf16_string_index = 0;

	if( libuna_utf16_string_with_index_copy_from_utf32(
	     utf16_string,
	     utf16_string_size,
	     &utf16_string_index,
	     utf32_string,
	     utf32_string_size,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_COPY_FAILED,
		 "%s: unable to copy UTF-32 string to UTF-16 string.",
		 function );

		return( -1 );
	}
	return( 1 );
}

/* Copies an UTF-16 string from an UTF-32 string
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_string_with_index_copy_from_utf32(
     libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     size_t *utf16_string_index,
     const libuna_utf32_character_t *utf32_string,
     size_t utf32_string_size,
     libcerror_error_t **error )
{
	static char *function                        = "libuna_utf16_string_with_index_copy_from_utf32";
	size_t utf32_string_index                    = 0;
	libuna_unicode_character_t unicode_character = 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_string_index == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-16 string index.",
		 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 );
	}
	while( utf32_string_index < utf32_string_size )
	{
		/* Convert the UTF-32 character bytes into a 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 );
		}
		/* Convert the Unicode character into UTF-16 character bytes
		 */
		if( libuna_unicode_character_copy_to_utf16(
		     unicode_character,
		     utf16_string,
		     utf16_string_size,
		     utf16_string_index,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
			 "%s: unable to copy Unicode character to UTF-16.",
			 function );

			return( -1 );
		}
	}
	return( 1 );
}

/* Compares an UTF-16 string with an UTF-32 string
 * Returns 1 if the strings are equal, 0 if not or -1 on error
 */
int libuna_utf16_string_compare_with_utf32(
     const libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     const libuna_utf32_character_t *utf32_string,
     size_t utf32_string_size,
     libcerror_error_t **error )
{
	static char *function                              = "libuna_utf16_string_compare_with_utf32";
	size_t utf16_string_index                          = 0;
	size_t utf32_string_index                          = 0;
	libuna_unicode_character_t utf16_unicode_character = 0;
	libuna_unicode_character_t utf32_unicode_character = 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( 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_string[ utf16_string_size - 1 ] == 0 )
	{
		utf16_string_size -= 1;
	}
	if( utf32_string[ utf16_string_size - 1 ] == 0 )
	{
		utf16_string_size -= 1;
	}
	while( ( utf16_string_index < utf16_string_size )
	    && ( utf32_string_index < utf32_string_size ) )
	{
		/* Convert the UTF-16 character bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_utf16(
		     &utf16_unicode_character,
		     utf16_string,
		     utf16_string_size,
		     &utf16_string_index,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
			 "%s: unable to copy Unicode character from UTF-16.",
			 function );

			return( -1 );
		}
		/* Convert the UTF-32 character bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_utf32(
		     &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 );
		}
		if( utf16_unicode_character != utf32_unicode_character )
		{
			return( 0 );
		}
	}
	/* Check if both strings were entirely processed
	 */
	if( ( utf16_string_index != utf16_string_size )
	 || ( utf32_string_index != utf32_string_size ) )
	{
		return( 0 );
	}
	return( 1 );
}

/* Determines the size of an UTF-16 string from an UTF-32 stream
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_string_size_from_utf32_stream(
     const uint8_t *utf32_stream,
     size_t utf32_stream_size,
     int byte_order,
     size_t *utf16_string_size,
     libcerror_error_t **error )
{
	static char *function                        = "libuna_utf16_string_size_from_utf32_stream";
	size_t utf32_stream_index                    = 0;
	libuna_unicode_character_t unicode_character = 0;
	int read_byte_order                          = 0;

	if( utf32_stream == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-32 stream.",
		 function );

		return( -1 );
	}
	if( utf32_stream_size > (size_t) SSIZE_MAX )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
		 "%s: invalid UTF-32 stream size value exceeds maximum.",
		 function );

		return( -1 );
	}
	if( ( utf32_stream_size < 4 )
	 || ( ( utf32_stream_size % 4 ) != 0 ) )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
		 "%s: missing UTF-32 stream bytes.",
		 function );

		return( -1 );
	}
	if( utf16_string_size == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-16 string size.",
		 function );

		return( -1 );
	}
	*utf16_string_size = 0;

	/* Check if UTF-32 stream is in big or little endian
	 */
	if( ( utf32_stream[ 0 ] == 0x00 )
	 && ( utf32_stream[ 1 ] == 0x00 )
	 && ( utf32_stream[ 2 ] == 0xfe )
	 && ( utf32_stream[ 3 ] == 0xff ) )
	{
		read_byte_order    = LIBUNA_ENDIAN_BIG;
		utf32_stream_index = 4;
	}
	else if( ( utf32_stream[ 0 ] == 0xff )
	      && ( utf32_stream[ 1 ] == 0xfe )
	      && ( utf32_stream[ 2 ] == 0x00 )
	      && ( utf32_stream[ 3 ] == 0x00 ) )
	{
		read_byte_order    = LIBUNA_ENDIAN_LITTLE;
		utf32_stream_index = 4;
	}
	if( byte_order == 0 )
	{
		byte_order = read_byte_order;
	}
	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 );
	}
	/* Check if the UTF-32 stream is terminated with zero bytes
	 */
	if( ( utf32_stream[ utf32_stream_size - 4 ] != 0 )
	 || ( utf32_stream[ utf32_stream_size - 3 ] != 0 )
	 || ( utf32_stream[ utf32_stream_size - 2 ] != 0 )
	 || ( utf32_stream[ utf32_stream_size - 1 ] != 0 ) )
	{
		*utf16_string_size += 1;
	}
	while( ( utf32_stream_index + 1 ) < utf32_stream_size )
	{
		/* Convert the UTF-32 stream bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_utf32_stream(
		     &unicode_character,
		     utf32_stream,
		     utf32_stream_size,
		     &utf32_stream_index,
		     byte_order,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
			 "%s: unable to copy Unicode character from UTF-32 stream.",
			 function );

			return( -1 );
		}
		/* Determine how many UTF-16 character bytes are required
		 */
		if( libuna_unicode_character_size_to_utf16(
		     unicode_character,
		     utf16_string_size,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
			 "%s: unable to unable to determine size of Unicode character in UTF-16.",
			 function );

			return( -1 );
		}
	}
	if( utf32_stream_index != utf32_stream_size )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
		 "%s: missing UTF-32 stream bytes.",
		 function );

		return( -1 );
	}
	return( 1 );
}

/* Copies an UTF-16 string from an UTF-32 stream
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_string_copy_from_utf32_stream(
     libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     const uint8_t *utf32_stream,
     size_t utf32_stream_size,
     int byte_order,
     libcerror_error_t **error )
{
	static char *function     = "libuna_utf16_string_copy_from_utf32_stream";
	size_t utf16_string_index = 0;

	if( libuna_utf16_string_with_index_copy_from_utf32_stream(
	     utf16_string,
	     utf16_string_size,
	     &utf16_string_index,
	     utf32_stream,
	     utf32_stream_size,
	     byte_order,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_COPY_FAILED,
		 "%s: unable to copy UTF-32 stream to UTF-16 string.",
		 function );

		return( -1 );
	}
	return( 1 );
}

/* Copies an UTF-16 string from an UTF-32 stream
 * Returns 1 if successful or -1 on error
 */
int libuna_utf16_string_with_index_copy_from_utf32_stream(
     libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     size_t *utf16_string_index,
     const uint8_t *utf32_stream,
     size_t utf32_stream_size,
     int byte_order,
     libcerror_error_t **error )
{
	static char *function                        = "libuna_utf16_string_with_index_copy_from_utf32_stream";
	size_t utf32_stream_index                    = 0;
	libuna_unicode_character_t unicode_character = 0;
	uint8_t zero_byte                            = 0;
	int read_byte_order                          = 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_string_index == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-16 string index.",
		 function );

		return( -1 );
	}
	if( utf32_stream == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-32 stream.",
		 function );

		return( -1 );
	}
	if( utf32_stream_size > (size_t) SSIZE_MAX )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
		 "%s: invalid UTF-32 stream size value exceeds maximum.",
		 function );

		return( -1 );
	}
	if( ( utf32_stream_size < 4 )
	 || ( ( utf32_stream_size % 4 ) != 0 ) )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
		 "%s: missing UTF-32 stream bytes.",
		 function );

		return( -1 );
	}
	/* Check if UTF-32 stream is in big or little endian
	 */
	if( ( utf32_stream[ 0 ] == 0x00 )
	 && ( utf32_stream[ 1 ] == 0x00 )
	 && ( utf32_stream[ 2 ] == 0xfe )
	 && ( utf32_stream[ 3 ] == 0xff ) )
	{
		read_byte_order    = LIBUNA_ENDIAN_BIG;
		utf32_stream_index = 4;
	}
	else if( ( utf32_stream[ 0 ] == 0xff )
	      && ( utf32_stream[ 1 ] == 0xfe )
	      && ( utf32_stream[ 2 ] == 0x00 )
	      && ( utf32_stream[ 3 ] == 0x00 ) )
	{
		read_byte_order    = LIBUNA_ENDIAN_LITTLE;
		utf32_stream_index = 4;
	}
	if( byte_order == 0 )
	{
		byte_order = read_byte_order;
	}
	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 );
	}
	/* Check if the UTF-32 stream is terminated with zero bytes
	 */
	if( ( utf32_stream[ utf32_stream_size - 4 ] != 0 )
	 || ( utf32_stream[ utf32_stream_size - 3 ] != 0 )
	 || ( utf32_stream[ utf32_stream_size - 2 ] != 0 )
	 || ( utf32_stream[ utf32_stream_size - 1 ] != 0 ) )
	{
		zero_byte = 1;
	}
	while( ( utf32_stream_index + 1 ) < utf32_stream_size )
	{
		/* Convert the UTF-32 stream bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_utf32_stream(
		     &unicode_character,
		     utf32_stream,
		     utf32_stream_size,
		     &utf32_stream_index,
		     byte_order,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
			 "%s: unable to copy Unicode character from UTF-32 stream.",
			 function );

			return( -1 );
		}
		/* Convert the Unicode character into UTF-16 character bytes
		 */
		if( libuna_unicode_character_copy_to_utf16(
		     unicode_character,
		     utf16_string,
		     utf16_string_size,
		     utf16_string_index,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
			 "%s: unable to copy Unicode character to UTF-16.",
			 function );

			return( -1 );
		}
	}
	if( utf32_stream_index != utf32_stream_size )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
		 "%s: missing UTF-32 stream bytes.",
		 function );

		return( -1 );
	}
	if( zero_byte != 0 )
	{
		if( *utf16_string_index >= utf16_string_size )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
			 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
			 "%s: UTF-16 string too small.",
			 function );

			return( -1 );
		}
		utf16_string[ *utf16_string_index ] = 0;

		*utf16_string_index += 1;
	}
	return( 1 );
}

/* Compares an UTF-16 string with an UTF-32 stream
 * Returns 1 if the strings are equal, 0 if not or -1 on error
 */
int libuna_utf16_string_compare_with_utf32_stream(
     const libuna_utf16_character_t *utf16_string,
     size_t utf16_string_size,
     const uint8_t *utf32_stream,
     size_t utf32_stream_size,
     int byte_order,
     libcerror_error_t **error )
{
	static char *function                                     = "libuna_utf16_string_compare_with_utf32_stream";
	size_t utf16_string_index                                 = 0;
	size_t utf32_stream_index                                 = 0;
	libuna_unicode_character_t utf16_unicode_character        = 0;
	libuna_unicode_character_t utf32_stream_unicode_character = 0;
	int read_byte_order                                       = 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( utf32_stream == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid UTF-32 stream.",
		 function );

		return( -1 );
	}
	if( utf32_stream_size > (size_t) SSIZE_MAX )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
		 "%s: invalid UTF-32 stream size value exceeds maximum.",
		 function );

		return( -1 );
	}
	if( ( utf32_stream_size < 4 )
	 || ( ( utf32_stream_size % 4 ) != 0 ) )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
		 "%s: missing UTF-32 stream bytes.",
		 function );

		return( -1 );
	}
	/* Check if UTF-32 stream is in big or little endian
	 */
	if( ( utf32_stream[ 0 ] == 0x00 )
	 && ( utf32_stream[ 1 ] == 0x00 )
	 && ( utf32_stream[ 2 ] == 0xfe )
	 && ( utf32_stream[ 3 ] == 0xff ) )
	{
		read_byte_order    = LIBUNA_ENDIAN_BIG;
		utf32_stream_index = 4;
	}
	else if( ( utf32_stream[ 0 ] == 0xff )
	      && ( utf32_stream[ 1 ] == 0xfe )
	      && ( utf32_stream[ 2 ] == 0x00 )
	      && ( utf32_stream[ 3 ] == 0x00 ) )
	{
		read_byte_order    = LIBUNA_ENDIAN_LITTLE;
		utf32_stream_index = 4;
	}
	if( byte_order == 0 )
	{
		byte_order = read_byte_order;
	}
	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[ utf16_string_size - 1 ] == 0 )
	{
		utf16_string_size -= 1;
	}
	/* Check if the UTF-32 stream is terminated with zero bytes
	 */
	if( ( utf32_stream[ utf32_stream_size - 4 ] == 0 )
	 && ( utf32_stream[ utf32_stream_size - 3 ] == 0 )
	 && ( utf32_stream[ utf32_stream_size - 2 ] == 0 )
	 && ( utf32_stream[ utf32_stream_size - 1 ] == 0 ) )
	{
		utf32_stream_size -= 1;
	}
	while( ( utf16_string_index < utf16_string_size )
	    && ( utf32_stream_index < utf32_stream_size ) )
	{
		/* Convert the UTF-16 character bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_utf16(
		     &utf16_unicode_character,
		     utf16_string,
		     utf16_string_size,
		     &utf16_string_index,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_OUTPUT_FAILED,
			 "%s: unable to copy Unicode character from UTF-16.",
			 function );

			return( -1 );
		}
		/* Convert the UTF-32 stream bytes into a Unicode character
		 */
		if( libuna_unicode_character_copy_from_utf32_stream(
		     &utf32_stream_unicode_character,
		     utf32_stream,
		     utf32_stream_size,
		     &utf32_stream_index,
		     byte_order,
                     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_CONVERSION,
			 LIBCERROR_CONVERSION_ERROR_INPUT_FAILED,
			 "%s: unable to copy Unicode character from UTF-32 stream.",
			 function );

			return( -1 );
		}
		if( utf16_unicode_character != utf32_stream_unicode_character )
		{
			return( 0 );
		}
	}
	/* Check if both strings were entirely processed
	 */
	if( ( utf16_string_index != utf16_string_size )
	 || ( utf32_stream_index != utf32_stream_size ) )
	{
		return( 0 );
	}
	return( 1 );
}

