/* The FreeDOS-32 Unicode Support Library version 2.1 * Copyright (C) 2001-2006  Salvatore ISAJA * * This file "utf16be.c" is part of the FreeDOS-32 Unicode * Support Library (the Program). * * The Program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * The 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 General Public License * along with the Program; see the file GPL.txt; if not, write to * the Free Software Foundation, Inc., * 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */#include <config.h>#include "unicode.h"#include <endian.h>/** * \addtogroup unicode * @{ */static inline uint16_t big_endian_16(uint16_t v){	#if __BYTE_ORDER == __LITTLE_ENDIAN /* Machine is little endian */	return (v << 8) | (v >> 8);	#else /* Machine is big endian */	return v;	#endif}/** * \brief Gets the length of a UTF-16BE character. * \remarks This is the big endian version of unicode_utf16le_len() */int unicode_utf16be_len(uint16_t lead_word){	int res = 1;	if ((big_endian_16(lead_word) & 0xFC00) == 0xD800) res = 2;	return res;}/** * \brief UTF-16BE to wide character. * \remarks This is the big endian version of unicode_utf16le_to_wchar() */int unicode_utf16be_to_wchar(wchar_t *restrict result, const uint16_t *restrict string, size_t size){	uint16_t v;	if (!size) return -ENAMETOOLONG;	v = big_endian_16(*string);	if ((v & 0xFC00) != 0xD800)	{		*result = (wchar_t) v;		return 1;	}	if (size < 2) return -ENAMETOOLONG;	*result = ((v & 0x03FF) << 10) + 0x010000;	v = big_endian_16(*(++string));	if ((v & 0xFC00) != 0xDC00) return -EILSEQ;	*result |= v & 0x03FF;	return 2;}/** * \brief Wide character to UTF-16BE. * \remarks This is the big endian version of unicode_wchar_to_utf16le() */int unicode_wchar_to_utf16be(uint16_t *s, wchar_t wc, size_t size){	if (wc >= 0)	{		if (wc < 0x010000)		{			*s = big_endian_16((uint16_t) wc);			return 1;		}		if (wc < 0x200000)		{			*s       = big_endian_16((uint16_t) (0xD800 + (((wc >> 16) - 1) << 6) + ((wc & 0x00FC00) >> 2)));			*(s + 1) = big_endian_16((uint16_t) (0xDC00 + (wc & 0x0003FF)));			return 2;		}	}	return -EINVAL;}/* @} */