Experiment with porting SGML to YAP, and trying to preserve SWI code as much

as possible.

packages/sgml/utf8.h

@@ -0,0 +1,45 @@
+/*  $Id$
+
+    Part of SWI-Prolog
+
+    Author:        Jan Wielemaker
+    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 ISUTF8_MB(c) ((unsigned)(c) >= 0xc0 && (unsigned)(c) <= 0xfd)
+
+#define utf8_get_char(in, chr) \
+	(*(in) & 0x80 ? sgml__utf8_get_char(in, chr) \
+		      : (*(chr) = *(in), (char *)(in)+1))
+
+extern char *sgml__utf8_get_char(const char *in, int *chr);
+#define utf8_get_uchar(in, chr) (unsigned char*)utf8_get_char((char*)(in), chr)
+
+extern char *sgml_utf8_put_char(char *out, int chr);
+#define utf8_put_char(out, chr) \
+	((chr) < 0x80 ? out[0]=(char)(chr), out+1 \
+		      : sgml_utf8_put_char(out, (chr)))
+
+extern size_t sgml_utf8_strlen(const char *s, size_t len);
+#define utf8_strlen sgml_utf8_strlen
+
+#endif /*UTF8_H_INCLUDED*/