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/*
(c) Copyright 2001-2009 The world wide DirectFB Open Source Community (directfb.org)
(c) Copyright 2000-2004 Convergence (integrated media) GmbH
All rights reserved.
Written by Denis Oliver Kropp <dok@directfb.org>,
Andreas Hundt <andi@fischlustig.de>,
Sven Neumann <neo@directfb.org>,
Ville Syrjälä <syrjala@sci.fi> and
Claudio Ciccani <klan@users.sf.net>.
UTF8 routines ported from glib-2.0 and optimized
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 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 __DIRECT__UTF8_H__
#define __DIRECT__UTF8_H__
#include <direct/types.h>
#define DIRECT_UTF8_SKIP(c) (((u8)(c) < 0xc0) ? 1 : __direct_utf8_skip[(u8)(c)&0x3f])
#define DIRECT_UTF8_GET_CHAR(p) (*(const u8*)(p) < 0xc0 ? \
*(const u8*)(p) : __direct_utf8_get_char((const u8*)(p)))
/*
* Actually the last two fields used to be zero since they indicate an
* invalid UTF-8 string. Changed it to 1 to avoid endless looping on
* invalid input.
*/
static const char __direct_utf8_skip[64] = {
2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,6,6,1,1
};
static __inline__ unichar __direct_utf8_get_char( const u8 *p )
{
int len;
register unichar result = p[0];
if (result < 0xc0)
return result;
if (result > 0xfd)
return (unichar) -1;
len = __direct_utf8_skip[result & 0x3f];
result &= 0x7c >> len;
while (--len) {
int c = *(++p);
if ((c & 0xc0) != 0x80)
return (unichar) -1;
result = (result << 6) | (c & 0x3f);
}
return result;
}
#endif
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