/**
* Copyright 2015 JogAmp Community. 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 JogAmp Community ``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 JogAmp Community 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.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
package com.jogamp.gluegen.cgram.types;
import java.util.List;
public class TypeComparator {
/**
* Supports semantic equality and hash functions for types.
*/
public static interface SemanticEqualityOp {
/**
* Semantic hashcode for Types exclusive its given {@link #getName() name}.
* @see #equalSemantics(SemanticEqualityOp)
*/
int hashCodeSemantics();
/**
* Semantic equality test for Types exclusive its given {@link #getName() name}.
* @see #hashCodeSemantics()
*/
boolean equalSemantics(final SemanticEqualityOp arg);
}
/**
* Supports common interface for {@link SemanticEqualityOp} and {@link AliasedSymbol}.
*/
public static interface AliasedSemanticSymbol extends AliasedSymbol, SemanticEqualityOp { };
/** Helper routine for list equality comparison*/
static <C> boolean listsEqual(final List<C> a, final List<C> b) {
if( a == null ) {
if( null != b ) {
return false;
} else {
return true; // elements equal, i.e. both null
}
}
if( b != null && a.size() == b.size() ) {
final int count = a.size();
for(int i=0; i<count; i++) {
final C ac = a.get(i);
final C bc = b.get(i);
if( null == ac ) {
if( null != bc ) {
return false;
} else {
continue; // elements equal, i.e. both null
}
}
if( !ac.equals(bc) ) {
return false;
}
}
return true;
}
return false;
}
/** Helper routine for list hashCode */
static <C extends SemanticEqualityOp> int listsHashCode(final List<C> a) {
if( a == null ) {
return 0;
} else {
final int count = a.size();
int hash = 31;
for(int i=0; i<count; i++) {
final C ac = a.get(i);
hash = ((hash << 5) - hash) + ( null != ac ? ac.hashCode() : 0 );
}
return hash;
}
}
/** Helper routine for list semantic equality comparison*/
static <C extends SemanticEqualityOp> boolean listsEqualSemantics(final List<C> a, final List<C> b) {
if( a == null ) {
if( null != b ) {
return false;
} else {
return true; // elements equal, i.e. both null
}
}
if( b != null && a.size() == b.size() ) {
final int count = a.size();
for(int i=0; i<count; i++) {
final C ac = a.get(i);
final C bc = b.get(i);
if( null == ac ) {
if( null != bc ) {
return false;
} else {
continue; // elements equal, i.e. both null
}
}
if( !ac.equalSemantics(bc) ) {
return false;
}
}
return true;
}
return false;
}
/** Helper routine for list hashCode */
static <C extends SemanticEqualityOp> int listsHashCodeSemantics(final List<C> a) {
if( a == null ) {
return 0;
} else {
final int count = a.size();
int hash = 31;
for(int i=0; i<count; i++) {
final C ac = a.get(i);
hash = ((hash << 5) - hash) + ( null != ac ? ac.hashCodeSemantics() : 0 );
}
return hash;
}
}
}