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/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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* The Original Code is Rhino code, released
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1997-1999 Netscape Communications Corporation. All
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* Alternatively, the contents of this file may be used under the
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* terms of the GNU Public License (the "GPL"), in which case the
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* provisions of the GPL are applicable instead of those above.
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* If you wish to allow use of your version of this file only
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* under the terms of the GPL and not to allow others to use your
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* version of this file under the NPL, indicate your decision by
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* deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL. If you do not delete
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* the provisions above, a recipient may use your version of this
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* file under either the NPL or the GPL.
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package org.mozilla.javascript;
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private static final int FIXUPTABLE_SIZE = 8;
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private static final boolean DEBUG = true;
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public void fixGotos(byte theCodeBuffer[])
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if ((itsPC == -1) && (itsFixupTable != null))
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throw new RuntimeException("Unlocated label");
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if (itsFixupTable != null) {
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for (int i = 0; i < itsFixupTableTop; i++) {
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int fixupSite = itsFixupTable[i];
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// -1 to get delta from instruction start
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short offset = (short)(itsPC - (fixupSite - 1));
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theCodeBuffer[fixupSite++] = (byte)(offset >> 8);
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theCodeBuffer[fixupSite] = (byte)offset;
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public void setPC(short thePC)
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if ((itsPC != -1) && (itsPC != thePC))
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throw new RuntimeException("Duplicate label");
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public void addFixup(int fixupSite)
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if (itsFixupTable == null) {
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itsFixupTable = new int[FIXUPTABLE_SIZE];
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itsFixupTable[0] = fixupSite;
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if (itsFixupTableTop == itsFixupTable.length) {
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int oldLength = itsFixupTable.length;
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int newTable[] = new int[oldLength + FIXUPTABLE_SIZE];
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System.arraycopy(itsFixupTable, 0, newTable, 0, oldLength);
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itsFixupTable = newTable;
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itsFixupTable[itsFixupTableTop++] = fixupSite;
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private int itsFixupTable[];
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private int itsFixupTableTop;