1/* 2 * Copyright (C) 2012 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef MatchResult_h 27#define MatchResult_h 28 29typedef uint64_t EncodedMatchResult; 30 31struct MatchResult { 32 ALWAYS_INLINE MatchResult(size_t start, size_t end) 33 : start(start) 34 , end(end) 35 { 36 } 37 38 explicit ALWAYS_INLINE MatchResult(EncodedMatchResult encoded) 39 { 40 union u { 41 uint64_t encoded; 42 struct s { 43 size_t start; 44 size_t end; 45 } split; 46 } value; 47 value.encoded = encoded; 48 start = value.split.start; 49 end = value.split.end; 50 } 51 52 ALWAYS_INLINE static MatchResult failed() 53 { 54 return MatchResult(WTF::notFound, 0); 55 } 56 57 ALWAYS_INLINE operator bool() 58 { 59 return start != WTF::notFound; 60 } 61 62 ALWAYS_INLINE bool empty() 63 { 64 return start == end; 65 } 66 67 size_t start; 68 size_t end; 69}; 70 71#endif 72