lubomir@319: /*
lubomir@319:  * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
lubomir@319:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
lubomir@319:  *
lubomir@319:  * This code is free software; you can redistribute it and/or modify it
lubomir@319:  * under the terms of the GNU General Public License version 2 only, as
lubomir@319:  * published by the Free Software Foundation.  Oracle designates this
lubomir@319:  * particular file as subject to the "Classpath" exception as provided
lubomir@319:  * by Oracle in the LICENSE file that accompanied this code.
lubomir@319:  *
lubomir@319:  * This code is distributed in the hope that it will be useful, but WITHOUT
lubomir@319:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
lubomir@319:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
lubomir@319:  * version 2 for more details (a copy is included in the LICENSE file that
lubomir@319:  * accompanied this code).
lubomir@319:  *
lubomir@319:  * You should have received a copy of the GNU General Public License version
lubomir@319:  * 2 along with this work; if not, write to the Free Software Foundation,
lubomir@319:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
lubomir@319:  *
lubomir@319:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
lubomir@319:  * or visit www.oracle.com if you need additional information or have any
lubomir@319:  * questions.
lubomir@319:  */
lubomir@319: 
lubomir@319: package org.apidesign.javap;
lubomir@319: 
lubomir@319: import static org.apidesign.javap.RuntimeConstants.ITEM_Bogus;
lubomir@319: import static org.apidesign.javap.RuntimeConstants.ITEM_Integer;
lubomir@319: import static org.apidesign.javap.RuntimeConstants.ITEM_Float;
lubomir@319: import static org.apidesign.javap.RuntimeConstants.ITEM_Double;
lubomir@319: import static org.apidesign.javap.RuntimeConstants.ITEM_Long;
lubomir@319: import static org.apidesign.javap.RuntimeConstants.ITEM_Null;
lubomir@319: import static org.apidesign.javap.RuntimeConstants.ITEM_InitObject;
lubomir@319: import static org.apidesign.javap.RuntimeConstants.ITEM_Object;
lubomir@319: import static org.apidesign.javap.RuntimeConstants.ITEM_NewObject;
lubomir@319: 
lubomir@319: public final class TypeArray {
lubomir@319:     private static final int CAPACITY_INCREMENT = 16;
lubomir@319: 
lubomir@319:     private int[] types;
lubomir@319:     private int size;
lubomir@319: 
lubomir@319:     public TypeArray() {
lubomir@319:     }
lubomir@319:     
lubomir@319:     public TypeArray(final TypeArray initialTypes) {
lubomir@319:         setAll(initialTypes);
lubomir@319:     }
lubomir@319: 
lubomir@319:     public void add(final int newType) {
lubomir@319:         ensureCapacity(size + 1);
lubomir@319:         types[size++] = newType;
lubomir@319:     }
lubomir@319: 
lubomir@319:     public void addAll(final TypeArray newTypes) {
lubomir@319:         addAll(newTypes.types, 0, newTypes.size);
lubomir@319:     }
lubomir@319: 
lubomir@319:     public void addAll(final int[] newTypes) {
lubomir@319:         addAll(newTypes, 0, newTypes.length);
lubomir@319:     }
lubomir@319: 
lubomir@319:     public void addAll(final int[] newTypes,
lubomir@319:                        final int offset,
lubomir@319:                        final int count) {
lubomir@319:         if (count > 0) {
lubomir@319:             ensureCapacity(size + count);
lubomir@319:             arraycopy(newTypes, offset, types, size, count);
lubomir@319:             size += count;
lubomir@319:         }
lubomir@319:     }
lubomir@319: 
lubomir@319:     public void set(final int index, final int newType) {
lubomir@319:         types[index] = newType;
lubomir@319:     }
lubomir@319: 
lubomir@319:     public void setAll(final TypeArray newTypes) {
lubomir@319:         setAll(newTypes.types, 0, newTypes.size);
lubomir@319:     }
lubomir@319: 
lubomir@319:     public void setAll(final int[] newTypes) {
lubomir@319:         setAll(newTypes, 0, newTypes.length);
lubomir@319:     }
lubomir@319: 
lubomir@319:     public void setAll(final int[] newTypes,
lubomir@319:                        final int offset,
lubomir@319:                        final int count) {
lubomir@319:         if (count > 0) {
lubomir@319:             ensureCapacity(count);
lubomir@319:             arraycopy(newTypes, offset, types, 0, count);
lubomir@319:             size = count;
lubomir@319:         } else {
lubomir@319:             clear();
lubomir@319:         }
lubomir@319:     }
lubomir@319: 
lubomir@319:     public void setSize(final int newSize) {
lubomir@319:         if (size != newSize) {
lubomir@319:             ensureCapacity(newSize);
lubomir@319: 
lubomir@319:             for (int i = size; i < newSize; ++i) {
lubomir@319:                 types[i] = 0;
lubomir@319:             }
lubomir@319:             size = newSize;
lubomir@319:         }
lubomir@319:     }
lubomir@319: 
lubomir@319:     public void clear() {
lubomir@319:         size = 0;
lubomir@319:     }
lubomir@319: 
lubomir@319:     public int getSize() {
lubomir@319:         return size;
lubomir@319:     }
lubomir@319: 
lubomir@319:     public int get(final int index) {
lubomir@319:         return types[index];
lubomir@319:     }
lubomir@319: 
lubomir@319:     public static String typeString(final int type) {
lubomir@319:         switch (type & 0xff) {
lubomir@319:             case ITEM_Bogus:
lubomir@319:                 return "_top_";
lubomir@319:             case ITEM_Integer:
lubomir@319:                 return "_int_";
lubomir@319:             case ITEM_Float:
lubomir@319:                 return "_float_";
lubomir@319:             case ITEM_Double:
lubomir@319:                 return "_double_";
lubomir@319:             case ITEM_Long:
lubomir@319:                 return "_long_";
lubomir@319:             case ITEM_Null:
lubomir@319:                 return "_null_";
lubomir@319:             case ITEM_InitObject: // UninitializedThis
lubomir@319:                 return "_init_";
lubomir@319:             case ITEM_Object:
lubomir@319:                 return "_object_";
lubomir@319:             case ITEM_NewObject: // Uninitialized
lubomir@319:                 return "_new_";
lubomir@319:             default:
lubomir@319:                 throw new IllegalArgumentException("Unknown type");
lubomir@319:         }
lubomir@319:     }
lubomir@319: 
lubomir@319:     @Override
lubomir@319:     public String toString() {
lubomir@319:         final StringBuilder sb = new StringBuilder("[");
lubomir@319:         if (size > 0) {
lubomir@319:             sb.append(typeString(types[0]));
lubomir@319:             for (int i = 1; i < size; ++i) {
lubomir@319:                 sb.append(", ");
lubomir@319:                 sb.append(typeString(types[i]));
lubomir@319:             }
lubomir@319:         }
lubomir@319: 
lubomir@319:         return sb.append(']').toString();
lubomir@319:     }
lubomir@319: 
lubomir@319:     private void ensureCapacity(final int minCapacity) {
lubomir@319:         if ((minCapacity == 0)
lubomir@319:                 || (types != null) && (minCapacity <= types.length)) {
lubomir@319:             return;
lubomir@319:         }
lubomir@319: 
lubomir@319:         final int newCapacity =
lubomir@319:                 ((minCapacity + CAPACITY_INCREMENT - 1) / CAPACITY_INCREMENT)
lubomir@319:                     * CAPACITY_INCREMENT;
lubomir@319:         final int[] newTypes = new int[newCapacity];
lubomir@319: 
lubomir@319:         if (size > 0) {
lubomir@319:             arraycopy(types, 0, newTypes, 0, size);
lubomir@319:         }
lubomir@319: 
lubomir@319:         types = newTypes;
lubomir@319:     }
lubomir@319: 
lubomir@319:     // no System.arraycopy
lubomir@319:     private void arraycopy(final int[] src, final int srcPos,
lubomir@319:                            final int[] dest, final int destPos,
lubomir@319:                            final int length) {
lubomir@319:         for (int i = 0; i < length; ++i) {
lubomir@319:             dest[destPos + i] = src[srcPos + i];
lubomir@319:         }
lubomir@319:     }
lubomir@319: }