xref: /external/webkit/JavaScriptCore/wtf/unicode/glib/UnicodeMacrosFromICU.h

/*
 *  Copyright (C) 2006 George Staikos <staikos@kde.org>
 *  Copyright (C) 2006 Alexey Proskuryakov <ap@nypop.com>
 *  Copyright (C) 2007 Apple Computer, Inc. All rights reserved.
 *  Copyright (C) 2008 Jürg Billeter <j@bitron.ch>
 *  Copyright (C) 2008 Dominik Röttsches <dominik.roettsches@access-company.com>
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library 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
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public License
 *  along with this library; see the file COPYING.LIB.  If not, write to
 *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *  Boston, MA 02110-1301, USA.
 *
 */

#ifndef UnicodeMacrosFromICU_h
#define UnicodeMacrosFromICU_h

// some defines from ICU

#define U16_IS_LEAD(c) (((c)&0xfffffc00)==0xd800)
#define U16_IS_TRAIL(c) (((c)&0xfffffc00)==0xdc00)
#define U16_SURROGATE_OFFSET ((0xd800<<10UL)+0xdc00-0x10000)
#define U16_GET_SUPPLEMENTARY(lead, trail) \
    (((UChar32)(lead)<<10UL)+(UChar32)(trail)-U16_SURROGATE_OFFSET)

#define U16_LEAD(supplementary) (UChar)(((supplementary)>>10)+0xd7c0)
#define U16_TRAIL(supplementary) (UChar)(((supplementary)&0x3ff)|0xdc00)

#define U_IS_SURROGATE(c) (((c)&0xfffff800)==0xd800)
#define U16_IS_SINGLE(c) !U_IS_SURROGATE(c)
#define U16_IS_SURROGATE(c) U_IS_SURROGATE(c)
#define U16_IS_SURROGATE_LEAD(c) (((c)&0x400)==0)

#define U16_PREV(s, start, i, c) { \
    (c)=(s)[--(i)]; \
    if(U16_IS_TRAIL(c)) { \
        uint16_t __c2; \
        if((i)>(start) && U16_IS_LEAD(__c2=(s)[(i)-1])) { \
            --(i); \
            (c)=U16_GET_SUPPLEMENTARY(__c2, (c)); \
        } \
    } \
}

#define U16_NEXT(s, i, length, c) { \
    (c)=(s)[(i)++]; \
    if(U16_IS_LEAD(c)) { \
        uint16_t __c2; \
        if((i)<(length) && U16_IS_TRAIL(__c2=(s)[(i)])) { \
            ++(i); \
            (c)=U16_GET_SUPPLEMENTARY((c), __c2); \
        } \
    } \
}

#define U_MASK(x) ((uint32_t)1<<(x))

#endif