michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0:  * vim: set ts=8 sts=4 et sw=4 tw=99:
michael@0:  *
michael@0:  * Copyright (C) 2012 Apple Inc. All rights reserved.
michael@0:  *
michael@0:  * Redistribution and use in source and binary forms, with or without
michael@0:  * modification, are permitted provided that the following conditions
michael@0:  * are met:
michael@0:  * 1. Redistributions of source code must retain the above copyright
michael@0:  *    notice, this list of conditions and the following disclaimer.
michael@0:  * 2. Redistributions in binary form must reproduce the above copyright
michael@0:  *    notice, this list of conditions and the following disclaimer in the
michael@0:  *    documentation and/or other materials provided with the distribution.
michael@0:  *
michael@0:  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
michael@0:  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
michael@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
michael@0:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
michael@0:  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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michael@0:  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
michael@0:  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
michael@0:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
michael@0:  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
michael@0:  */
michael@0: 
michael@0: #ifndef yarr_MatchResult_h
michael@0: #define yarr_MatchResult_h
michael@0: 
michael@0: #include "yarr/wtfbridge.h"
michael@0: 
michael@0: typedef uint64_t EncodedMatchResult;
michael@0: 
michael@0: struct MatchResult {
michael@0:     MatchResult(int start, int end)
michael@0:         : start(start)
michael@0:         , end(end)
michael@0:     {
michael@0:     }
michael@0: 
michael@0: #if !WTF_CPU_X86_64 || WTF_PLATFORM_WIN
michael@0:     explicit MatchResult(EncodedMatchResult encoded)
michael@0:     {
michael@0:         union u {
michael@0:             uint64_t encoded;
michael@0:             struct s {
michael@0:                 int start;
michael@0:                 int end;
michael@0:             } split;
michael@0:         } value;
michael@0:         value.encoded = encoded;
michael@0:         start = value.split.start;
michael@0:         end = value.split.end;
michael@0:     }
michael@0: #endif
michael@0: 
michael@0:     static MatchResult failed()
michael@0:     {
michael@0:         return MatchResult(int(WTF::notFound), 0);
michael@0:     }
michael@0: 
michael@0:     operator bool()
michael@0:     {
michael@0:         return start != int(WTF::notFound);
michael@0:     }
michael@0: 
michael@0:     bool empty()
michael@0:     {
michael@0:         return start == end;
michael@0:     }
michael@0: 
michael@0:     // strings are limited to a length of 2^28. So this is safe
michael@0:     int start;
michael@0:     int end;
michael@0: };
michael@0: 
michael@0: #endif /* yarr_MatchResult_h */