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+unit CollLibrary;
+
+(*****************************************************************************
+ * Copyright 2003 by Matthew Greet
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation; either version 2.1 of the License, or (at your
+ * option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
+ * details. (http://opensource.org/licenses/lgpl-license.php)
+ *
+ * See http://www.warmachine.u-net.com/delphi_collections for updates and downloads.
+ *
+ * $Version: v1.0.3 $
+ * $Revision: 1.0.1.1 $
+ * $Log: D:\QVCS Repositories\Delphi Collections\CollLibrary.qbt $
+ *
+ * Initial version.
+ *
+ * Revision 1.0.1.1 by: Matthew Greet Rev date: 24/10/03 16:48:16
+ * v1.0 branch.
+ *
+ * Revision 1.0 by: Matthew Greet Rev date: 06/04/03 10:40:32
+ * Initial revision.
+ *
+ * $Endlog$
+ *****************************************************************************)
+
+interface
+
+uses
+ Collections, CollArray, CollHash, CollList, CollPArray, CollWrappers;
+
+type
+ TMiscCollectionLibrary = class
+ public
+ class function ClassNameToClassType(ClassName: String): TAbstractCollectionClass;
+ class function EqualIID(const IID1, IID2: TGUID): Boolean;
+ class function HashCode(Value: String): Integer;
+ class procedure ShuffleArray(var ItemArray: array of ICollectable);
+ class procedure ShuffleList(const List: IList);
+ end;
+
+implementation
+
+{ TMiscCollectionLibrary }
+class function TMiscCollectionLibrary.ClassNameToClassType(ClassName: String): TAbstractCollectionClass;
+begin
+ if ClassName = 'TArray' then
+ Result := TArray
+ else if ClassName = 'THashSet' then
+ Result := THashSet
+ else if ClassName = 'THashMap' then
+ Result := THashMap
+ else if ClassName = 'THashIntegerMap' then
+ Result := THashIntegerMap
+ else if ClassName = 'THashStringMap' then
+ Result := THashStringMap
+ else if ClassName = 'TListSet' then
+ Result := TListSet
+ else if ClassName = 'TListMap' then
+ Result := TListMap
+ else if ClassName = 'TPArrayBag' then
+ Result := TPArrayBag
+ else if ClassName = 'TPArraySet' then
+ Result := TPArraySet
+ else if ClassName = 'TPArrayList' then
+ Result := TPArrayList
+ else if ClassName = 'TPArrayMap' then
+ Result := TPArrayMap
+ else
+ Result := nil;
+end;
+
+class function TMiscCollectionLibrary.EqualIID(const IID1, IID2: TGUID): Boolean;
+begin
+ Result := (IID1.D1 = IID2.D1) and (IID1.D2 = IID2.D2) and (IID1.D3 = IID2.D3) and
+ (IID1.D4[0] = IID2.D4[0]) and (IID1.D4[1] = IID2.D4[1]) and
+ (IID1.D4[2] = IID2.D4[2]) and (IID1.D4[3] = IID2.D4[3]) and
+ (IID1.D4[4] = IID2.D4[4]) and (IID1.D4[5] = IID2.D4[5]) and
+ (IID1.D4[6] = IID2.D4[6]) and (IID1.D4[7] = IID2.D4[7]);
+end;
+
+class function TMiscCollectionLibrary.HashCode(Value: String): Integer;
+var
+ I: Integer;
+begin
+ Result := 0;
+ for I := 1 to Length(Value) do
+ Result := (Result shl 1) xor Ord(Value[I]);
+end;
+
+class procedure TMiscCollectionLibrary.ShuffleArray(var ItemArray: array of ICollectable);
+var
+ Item: ICollectable;
+ ArraySize, I, Index: Integer;
+begin
+ Randomize;
+ ArraySize := Length(ItemArray);
+ for I := 0 to ArraySize - 1 do
+ begin
+ Index := (I + Random(ArraySize - 1) + 1) mod ArraySize;
+ Item := ItemArray[I];
+ ItemArray[I] := ItemArray[Index];
+ ItemArray[Index] := Item;
+ end;
+end;
+
+class procedure TMiscCollectionLibrary.ShuffleList(const List: IList);
+var
+ ListSize, I: Integer;
+begin
+ Randomize;
+ ListSize := List.GetSize;
+ for I := 0 to ListSize - 1 do
+ begin
+ List.Exchange(I, (I + Random(ListSize - 1) + 1) mod ListSize);
+ end;
+end;
+
+
+end.