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/**
* Copyright (c) Rich Hickey. All rights reserved.
* The use and distribution terms for this software are covered by the
* Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
* which can be found in the file epl-v10.html at the root of this distribution.
* By using this software in any fashion, you are agreeing to be bound by
* the terms of this license.
* You must not remove this notice, or any other, from this software.
**/
/* rich Apr 19, 2008 */
package clojure.lang;
import java.math.BigInteger;
public class Util{
static public boolean equiv(Object k1, Object k2){
if(k1 == k2)
return true;
if(k1 != null)
{
if(k1 instanceof Number && k2 instanceof Number)
return Numbers.equiv(k1, k2);
else if(k1 instanceof IPersistentCollection && k2 instanceof IPersistentCollection)
return ((IPersistentCollection)k1).equiv(k2);
return k1.equals(k2);
}
return false;
}
static public boolean equals(Object k1, Object k2){
if(k1 == k2)
return true;
return k1 != null && k1.equals(k2);
}
static public boolean equals(long x, long y){
return x == y;
}
static public boolean equals(double x, double y){
return x == y;
}
static public boolean equals(long x, Object y){
return equals((Object)x,y);
}
static public boolean equals(Object x, long y){
return equals(x,(Object)y);
}
static public boolean equals(double x, Object y){
return equals((Object)x,y);
}
static public boolean equals(Object x, double y){
return equals(x,(Object)y);
}
static public boolean identical(Object k1, Object k2){
return k1 == k2;
}
static public Class classOf(Object x){
if(x != null)
return x.getClass();
return null;
}
static public int compare(Object k1, Object k2){
if(k1 == k2)
return 0;
if(k1 != null)
{
if(k2 == null)
return 1;
if(k1 instanceof Number)
return Numbers.compare((Number) k1, (Number) k2);
return ((Comparable) k1).compareTo(k2);
}
return -1;
}
static public int hash(Object o){
if(o == null)
return 0;
return o.hashCode();
}
static public int hashCombine(int seed, int hash){
//a la boost
seed ^= hash + 0x9e3779b9 + (seed << 6) + (seed >> 2);
return seed;
}
static public boolean isPrimitive(Class c){
return c != null && c.isPrimitive() && !(c == Void.TYPE);
}
static public boolean isInteger(Object x){
return x instanceof Integer
|| x instanceof Long
|| x instanceof BigInteger;
}
static public Object ret1(Object ret, Object nil){
return ret;
}
static public ISeq ret1(ISeq ret, Object nil){
return ret;
}
}
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