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yap-6.3/packages/PLStream/pl-utf8.h

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2008-12-22 12:02:22 +00:00
/* $Id$
Part of SWI-Prolog
Author: Jan Wielemaker and Anjo Anjewierden
E-mail: jan@swi.psy.uva.nl
WWW: http://www.swi-prolog.org
Copyright (C): 1985-2002, University of Amsterdam
This library 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 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef UTF8_H_INCLUDED
#define UTF8_H_INCLUDED
#define UTF8_MALFORMED_REPLACEMENT 0xfffd
#define ISUTF8_MB(c) ((unsigned)(c) >= 0xc0 && (unsigned)(c) <= 0xfd)
#define ISUTF8_CB(c) (((c)&0xc0) == 0x80) /* Is continuation byte */
#define ISUTF8_FB2(c) (((c)&0xe0) == 0xc0)
#define ISUTF8_FB3(c) (((c)&0xf0) == 0xe0)
#define ISUTF8_FB4(c) (((c)&0xf8) == 0xf0)
#define ISUTF8_FB5(c) (((c)&0xfc) == 0xf8)
#define ISUTF8_FB6(c) (((c)&0xfe) == 0xfc)
#define UTF8_FBN(c) (!(c&0x80) ? 0 : \
ISUTF8_FB2(c) ? 1 : \
ISUTF8_FB3(c) ? 2 : \
ISUTF8_FB4(c) ? 3 : \
ISUTF8_FB5(c) ? 4 : \
ISUTF8_FB6(c) ? 5 : -1)
#define UTF8_FBV(c,n) ( n == 0 ? c : (c & ((0x01<<(6-n))-1)) )
#define utf8_get_char(in, chr) \
(*(in) & 0x80 ? _PL__utf8_get_char(in, chr) \
: (*(chr) = *(in), (char *)(in)+1))
#define utf8_put_char(out, chr) \
((chr) < 0x80 ? out[0]=(char)(chr), out+1 \
: _PL__utf8_put_char(out, (chr)))
extern char *_PL__utf8_get_char(const char *in, int *chr);
extern char *_PL__utf8_put_char(char *out, int chr);
extern size_t utf8_strlen(const char *s, size_t len);
#endif /*UTF8_H_INCLUDED*/