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Diffstat (limited to 'src/3rdparty/masm/runtime/MatchResult.h')
-rw-r--r-- | src/3rdparty/masm/runtime/MatchResult.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/src/3rdparty/masm/runtime/MatchResult.h b/src/3rdparty/masm/runtime/MatchResult.h new file mode 100644 index 0000000000..d87c8516b0 --- /dev/null +++ b/src/3rdparty/masm/runtime/MatchResult.h @@ -0,0 +1,71 @@ +/* + * Copyright (C) 2012 Apple Inc. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef MatchResult_h +#define MatchResult_h + +typedef uint64_t EncodedMatchResult; + +struct MatchResult { + ALWAYS_INLINE MatchResult(size_t start, size_t end) + : start(start) + , end(end) + { + } + + explicit ALWAYS_INLINE MatchResult(EncodedMatchResult encoded) + { + union u { + uint64_t encoded; + struct s { + size_t start; + size_t end; + } split; + } value; + value.encoded = encoded; + start = value.split.start; + end = value.split.end; + } + + ALWAYS_INLINE static MatchResult failed() + { + return MatchResult(WTF::notFound, 0); + } + + ALWAYS_INLINE operator bool() + { + return start != WTF::notFound; + } + + ALWAYS_INLINE bool empty() + { + return start == end; + } + + size_t start; + size_t end; +}; + +#endif |