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| 1 /* | 1 /* |
| 2 * Copyright (C) 2008 Apple Inc. All rights reserved. | 2 * Copyright (C) 2008 Apple Inc. All rights reserved. |
| 3 * | 3 * |
| 4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
| 5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
| 6 * are met: | 6 * are met: |
| 7 * | 7 * |
| 8 * 1. Redistributions of source code must retain the above copyright | 8 * 1. Redistributions of source code must retain the above copyright |
| 9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
| 10 * 2. Redistributions in binary form must reproduce the above copyright | 10 * 2. Redistributions in binary form must reproduce the above copyright |
| (...skipping 11 matching lines...) Expand all Loading... |
| 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 */ | 27 */ |
| 28 | 28 |
| 29 #ifndef AtomicStringHash_h | 29 #ifndef AtomicStringHash_h |
| 30 #define AtomicStringHash_h | 30 #define AtomicStringHash_h |
| 31 | 31 |
| 32 #include "wtf/HashTraits.h" |
| 32 #include "wtf/text/AtomicString.h" | 33 #include "wtf/text/AtomicString.h" |
| 33 #include "wtf/HashTraits.h" | |
| 34 | 34 |
| 35 namespace WTF { | 35 namespace WTF { |
| 36 | 36 |
| 37 struct AtomicStringHash { | 37 struct AtomicStringHash { |
| 38 static unsigned hash(const AtomicString& key) | 38 static unsigned hash(const AtomicString& key) |
| 39 { | 39 { |
| 40 return key.impl()->existingHash(); | 40 return key.impl()->existingHash(); |
| 41 } | 41 } |
| 42 | 42 |
| 43 static bool equal(const AtomicString& a, const AtomicString& b) | 43 static bool equal(const AtomicString& a, const AtomicString& b) |
| 44 { | 44 { |
| 45 return a == b; | 45 return a == b; |
| 46 } | 46 } |
| 47 | 47 |
| 48 static const bool safeToCompareToEmptyOrDeleted = false; | 48 static const bool safeToCompareToEmptyOrDeleted = false; |
| 49 }; | 49 }; |
| 50 | 50 |
| 51 // AtomicStringHash is the default hash for AtomicString | 51 // AtomicStringHash is the default hash for AtomicString |
| 52 template<> struct HashTraits<AtomicString> : SimpleClassHashTraits<AtomicStr
ing> { | 52 template<> struct HashTraits<AtomicString> : SimpleClassHashTraits<AtomicString>
{ |
| 53 // Unlike other types, we can return a const reference for AtomicString'
s empty value (nullAtom). | 53 // Unlike other types, we can return a const reference for AtomicString's |
| 54 typedef const AtomicString& PeekOutType; | 54 // empty value (nullAtom). |
| 55 typedef const AtomicString& PeekOutType; |
| 55 | 56 |
| 56 static const AtomicString& emptyValue() { return nullAtom; } | 57 static const AtomicString& emptyValue() { return nullAtom; } |
| 57 static PeekOutType peek(const AtomicString& value) { return value; } | 58 static PeekOutType peek(const AtomicString& value) { return value; } |
| 58 | 59 |
| 59 static const bool hasIsEmptyValueFunction = true; | 60 static const bool hasIsEmptyValueFunction = true; |
| 60 static bool isEmptyValue(const AtomicString& value) { return value.isNul
l(); } | 61 static bool isEmptyValue(const AtomicString& value) { return value.isNull();
} |
| 61 }; | 62 }; |
| 62 | 63 |
| 63 } | 64 } |
| 64 | 65 |
| 65 using WTF::AtomicStringHash; | 66 using WTF::AtomicStringHash; |
| 66 | 67 |
| 67 #endif | 68 #endif |
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