+++ /dev/null
-/*******************************************************************************
- * Copyright (c) 2000, 2004 IBM Corporation and others.
- * All rights reserved. This program and the accompanying materials
- * are made available under the terms of the Common Public License v1.0
- * which accompanies this distribution, and is available at
- * http://www.eclipse.org/legal/cpl-v10.html
- *
- * Contributors:
- * IBM Corporation - initial API and implementation
- *******************************************************************************/
-package org.eclipse.jdt.internal.compiler.classfmt;
-
-abstract public class ClassFileStruct implements ClassFileConstants {
- byte[] reference;
- int structOffset;
-public ClassFileStruct(byte classFileBytes[], int off) {
- reference = classFileBytes;
- structOffset = off;
-}
-public ClassFileStruct (byte classFileBytes[], int off, boolean verifyStructure) {
- reference = classFileBytes;
- structOffset = off;
-}
-public double doubleAt(int relativeOffset) {
- return (Double.longBitsToDouble(this.i8At(relativeOffset)));
-}
-public float floatAt(int relativeOffset) {
- return (Float.intBitsToFloat(this.i4At(relativeOffset)));
-}
-public int i1At(int relativeOffset) {
- return reference[relativeOffset + structOffset];
-}
-public int i2At(int relativeOffset) {
- int position = relativeOffset + structOffset;
- return (reference[position++] << 8) + (reference[position] & 0xFF);
-}
-public int i4At(int relativeOffset) {
- int position = relativeOffset + structOffset;
- return ((reference[position++] & 0xFF) << 24) + ((reference[position++] & 0xFF) << 16) + ((reference[position++] & 0xFF) << 8) + (reference[position] & 0xFF);
-}
-public long i8At(int relativeOffset) {
- int position = relativeOffset + structOffset;
- return (((long) (reference[position++] & 0xFF)) << 56)
- + (((long) (reference[position++] & 0xFF)) << 48)
- + (((long) (reference[position++] & 0xFF)) << 40)
- + (((long) (reference[position++] & 0xFF)) << 32)
- + (((long) (reference[position++] & 0xFF)) << 24)
- + (((long) (reference[position++] & 0xFF)) << 16)
- + (((long) (reference[position++] & 0xFF)) << 8)
- + (reference[position++] & 0xFF);
-}
-public static String printTypeModifiers(int modifiers) {
-
- java.io.ByteArrayOutputStream out = new java.io.ByteArrayOutputStream();
- java.io.PrintWriter print = new java.io.PrintWriter(out);
-
- if ((modifiers & AccPublic) != 0) print.print("public "); //$NON-NLS-1$
- if ((modifiers & AccPrivate) != 0) print.print("private "); //$NON-NLS-1$
- if ((modifiers & AccFinal) != 0) print.print("final "); //$NON-NLS-1$
- if ((modifiers & AccSuper) != 0) print.print("super "); //$NON-NLS-1$
- if ((modifiers & AccInterface) != 0) print.print("interface "); //$NON-NLS-1$
- if ((modifiers & AccAbstract) != 0) print.print("abstract "); //$NON-NLS-1$
- print.flush();
- return out.toString();
-}
-public int u1At(int relativeOffset) {
- return (reference[relativeOffset + structOffset] & 0xFF);
-}
-public int u2At(int relativeOffset) {
- int position = relativeOffset + structOffset;
- return ((reference[position++] & 0xFF) << 8) + (reference[position] & 0xFF);
-}
-public long u4At(int relativeOffset) {
- int position = relativeOffset + structOffset;
- return (((reference[position++] & 0xFFL) << 24) + ((reference[position++] & 0xFF) << 16) + ((reference[position++] & 0xFF) << 8) + (reference[position] & 0xFF));
-}
-public char[] utf8At(int relativeOffset, int bytesAvailable) {
- int length = bytesAvailable;
- char outputBuf[] = new char[bytesAvailable];
- int outputPos = 0;
- int readOffset = this.structOffset + relativeOffset;
-
- while (length != 0) {
- int x = this.reference[readOffset++] & 0xFF;
- length--;
- if ((0x80 & x) != 0) {
- if ((x & 0x20) != 0) {
- length-=2;
- x = ((x & 0xF) << 12) | ((this.reference[readOffset++] & 0x3F) << 6) | (this.reference[readOffset++] & 0x3F);
- } else {
- length--;
- x = ((x & 0x1F) << 6) | (this.reference[readOffset++] & 0x3F);
- }
- }
- outputBuf[outputPos++] = (char) x;
- }
-
- if (outputPos != bytesAvailable) {
- System.arraycopy(outputBuf, 0, (outputBuf = new char[outputPos]), 0, outputPos);
- }
- return outputBuf;
-}
-
-protected void reset() {
- this.reference = null;
-}
-
-public char[] utf8At(int relativeOffset, int bytesAvailable, boolean testValidity) throws ClassFormatException {
- int x, y, z;
- int length = bytesAvailable;
- char outputBuf[] = new char[bytesAvailable];
- int outputPos = 0;
- int readOffset = structOffset + relativeOffset;
-
- while (length != 0) {
- x = reference[readOffset++] & 0xFF;
- length--;
- if ((0x80 & x) != 0) {
- if (testValidity) {
- if ((0x40 & x) == 0) {
- throw new ClassFormatException(ClassFormatException.ErrMalformedUtf8);
- }
- if (length < 1) {
- throw new ClassFormatException(ClassFormatException.ErrMalformedUtf8);
- }
- }
- y = this.reference[readOffset++] & 0xFF;
- length--;
- if (testValidity) {
- if ((y & 0xC0) != 0x80) {
- throw new ClassFormatException(ClassFormatException.ErrMalformedUtf8);
- }
- }
- if ((x & 0x20) != 0) {
- if (testValidity && (length < 1)) {
- throw new ClassFormatException(ClassFormatException.ErrMalformedUtf8);
- }
- z = this.reference[readOffset++] & 0xFF;
- length--;
- if (testValidity && ((z & 0xC0) != 0x80)) {
- throw new ClassFormatException(ClassFormatException.ErrMalformedUtf8);
- }
- x = ((x & 0x1F) << 12) + ((y & 0x3F) << 6) + (z & 0x3F);
- if (testValidity && (x < 0x0800)) {
- throw new ClassFormatException(ClassFormatException.ErrMalformedUtf8);
- }
- } else {
- x = ((x & 0x1F) << 6) + (y & 0x3F);
- if (testValidity && !((x == 0) || (x >= 0x80))) {
- throw new ClassFormatException(ClassFormatException.ErrMalformedUtf8);
- }
- }
- } else {
- if (testValidity && x == 0) {
- throw new ClassFormatException(ClassFormatException.ErrMalformedUtf8);
- }
- }
- outputBuf[outputPos++] = (char) x;
- }
-
- if (outputPos != bytesAvailable) {
- System.arraycopy(outputBuf, 0, (outputBuf = new char[outputPos]), 0, outputPos);
- }
- return outputBuf;
-}
-public static void verifyMethodNameAndSignature(char[] name, char[] signature) throws ClassFormatException {
-
- // ensure name is not empty
- if (name.length == 0) {
- throw new ClassFormatException(ClassFormatException.ErrInvalidMethodName);
- }
-
- // if name begins with the < character it must be clinit or init
- if (name[0] == '<') {
- if (new String(name).equals("<clinit>") || new String(name).equals("<init>")) { //$NON-NLS-2$ //$NON-NLS-1$
- int signatureLength = signature.length;
- if (!((signatureLength > 2)
- && (signature[0] == '(')
- && (signature[signatureLength - 2] == ')')
- && (signature[signatureLength - 1] == 'V'))) {
- throw new ClassFormatException(ClassFormatException.ErrInvalidMethodSignature);
- }
- } else {
- throw new ClassFormatException(ClassFormatException.ErrInvalidMethodName);
- }
- }
-}
-}
projects / org.ibex.tool.git / blobdiff