Add WTF::Hasher, an easier to use replacement for WTF::IntegerHasher

https://bugs.webkit.org/show_bug.cgi?id=180318

Reviewed by JF Bastien.

Source/WTF:

* WTF.xcodeproj/project.pbxproj: Added Hasher.h.
* wtf/CMakeLists.txt: Ditto.

* wtf/Forward.h: Added Hasher and TextStream.

* wtf/Hasher.h: Moved StringHasher into a separate header. Added Hasher.
Marked IntegerHasher deprecated.

* wtf/text/CString.cpp: Include StringHasher.h instead of Hasher.h.
* wtf/text/StringHash.h: Ditto.

* wtf/text/StringHasher.h: Added. Moved StringHasher here from Hasher.h.

* wtf/text/StringImpl.h: Include StringHasher.h instead of Hasher.h.

* wtf/text/WTFString.h: Added a hash function. This was useful in some
adoption I was doing in WebCore, not included in this patch.

* wtf/unicode/UTF8.cpp: Include StringHasher.h instead of Hasher.h.

Tools:

* TestWebKitAPI/CMakeLists.txt: Added Hasher.cpp.
* TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj: Ditto.

* TestWebKitAPI/Tests/WTF/Hasher.cpp: Added. Contains tests of the new
WTF::Hasher class.

* TestWebKitAPI/Tests/WTF/StringHasher.cpp: Include StringHasher.h instead of
Hasher.h.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@225463 268f45cc-cd09-0410-ab3c-d52691b4dbfc

Author: [email protected]

Source/WTF/ChangeLog

@@ -1,3 +1,30 @@
+2017-12-03  Darin Adler  <[email protected]>
+
+        Add WTF::Hasher, an easier to use replacement for WTF::IntegerHasher
+        https://bugs.webkit.org/show_bug.cgi?id=180318
+
+        Reviewed by JF Bastien.
+
+        * WTF.xcodeproj/project.pbxproj: Added Hasher.h.
+        * wtf/CMakeLists.txt: Ditto.
+
+        * wtf/Forward.h: Added Hasher and TextStream.
+
+        * wtf/Hasher.h: Moved StringHasher into a separate header. Added Hasher.
+        Marked IntegerHasher deprecated.
+
+        * wtf/text/CString.cpp: Include StringHasher.h instead of Hasher.h.
+        * wtf/text/StringHash.h: Ditto.
+
+        * wtf/text/StringHasher.h: Added. Moved StringHasher here from Hasher.h.
+
+        * wtf/text/StringImpl.h: Include StringHasher.h instead of Hasher.h.
+
+        * wtf/text/WTFString.h: Added a hash function. This was useful in some
+        adoption I was doing in WebCore, not included in this patch.
+
+        * wtf/unicode/UTF8.cpp: Include StringHasher.h instead of Hasher.h.
+
 2017-12-02  Brady Eidson  <[email protected]>
 
         Factor out the "databaseTaskQueue" parts of IDBServer into something reusable.

Source/WTF/WTF.xcodeproj/project.pbxproj

@@ -378,6 +378,7 @@
 		83F2BADE1CF9524E003E99C3 /* Function.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = Function.h; sourceTree = "<group>"; };
 		83FBA93119DF459700F30ADB /* TypeCasts.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = TypeCasts.h; sourceTree = "<group>"; };
 		86F46F5F1A2840EE00CCBF22 /* RefCounter.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RefCounter.h; sourceTree = "<group>"; };
+		933D63191FCB6AB90032ECD6 /* StringHasher.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = StringHasher.h; sourceTree = "<group>"; };
 		93934BD218A1E8C300D0D6A1 /* StringViewObjC.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; name = StringViewObjC.mm; path = mac/StringViewObjC.mm; sourceTree = "<group>"; };
 		93934BD418A1F16900D0D6A1 /* StringViewCF.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = StringViewCF.cpp; path = cf/StringViewCF.cpp; sourceTree = "<group>"; };
 		93AC91A718942FC400244939 /* LChar.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = LChar.h; sourceTree = "<group>"; };
@@ -1141,6 +1142,7 @@
 				A8A47326151A825B004123FF /* StringConcatenate.h */,
 				7CD4C26F1E2C82B900929470 /* StringConcatenateNumbers.h */,
 				A8A47327151A825B004123FF /* StringHash.h */,
+				933D63191FCB6AB90032ECD6 /* StringHasher.h */,
 				A8A47328151A825B004123FF /* StringImpl.cpp */,
 				A8A47329151A825B004123FF /* StringImpl.h */,
 				0F0F52691F421FF8004A452C /* StringMalloc.cpp */,

Source/WTF/wtf/CMakeLists.txt

@@ -186,6 +186,7 @@ set(WTF_HEADERS
     text/StringBuffer.h
     text/StringCommon.h
     text/StringHash.h
+    text/StringHasher.h
     text/StringImpl.h
     text/StringMalloc.h
     text/StringVector.h

Source/WTF/wtf/Forward.h

@@ -1,5 +1,5 @@
 /*
- *  Copyright (C) 2006, 2009, 2011 Apple Inc. All rights reserved.
+ *  Copyright (C) 2006-2017 Apple Inc. All rights reserved.
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Library General Public
@@ -34,6 +34,7 @@ class BinarySemaphore;
 class CString;
 class CrashOnOverflow;
 class FunctionDispatcher;
+class Hasher;
 class OrdinalNumber;
 class PrintStream;
 class SHA1;
@@ -42,6 +43,7 @@ class StringBuilder;
 class StringImpl;
 class StringView;
 class TextPosition;
+class TextStream;
 
 struct FastMalloc;
 
@@ -69,14 +71,15 @@ template<typename ValueArg, typename = typename DefaultHash<ValueArg>::Hash, typ
 using WTF::AtomicString;
 using WTF::AtomicStringImpl;
 using WTF::BinarySemaphore;
-using WTF::CompletionHandler;
 using WTF::CString;
+using WTF::CompletionHandler;
 using WTF::Expected;
 using WTF::Function;
 using WTF::FunctionDispatcher;
 using WTF::HashCountedSet;
 using WTF::HashMap;
 using WTF::HashSet;
+using WTF::Hasher;
 using WTF::LazyNeverDestroyed;
 using WTF::NeverDestroyed;
 using WTF::OptionSet;
@@ -91,5 +94,6 @@ using WTF::StringBuilder;
 using WTF::StringImpl;
 using WTF::StringView;
 using WTF::TextPosition;
+using WTF::TextStream;
 using WTF::Variant;
 using WTF::Vector;