--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/src/share/classes/com/sun/tools/javac/jvm/ClassFile.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,160 @@
+/*
+ * Copyright 1999-2005 Sun Microsystems, Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package com.sun.tools.javac.jvm;
+
+import com.sun.tools.javac.code.*;
+import com.sun.tools.javac.util.*;
+
+/** A JVM class file.
+ *
+ * <p>Generic Java classfiles have one additional attribute for classes,
+ * methods and fields:
+ * <pre>
+ * "Signature" (u4 attr-length, u2 signature-index)
+ * </pre>
+ *
+ * <p>A signature gives the full Java type of a method or field. When
+ * used as a class attribute, it indicates type parameters, followed
+ * by supertype, followed by all interfaces.
+ * <pre>
+ * methodOrFieldSignature ::= type
+ * classSignature ::= [ typeparams ] supertype { interfacetype }
+ * </pre>
+ * <p>The type syntax in signatures is extended as follows:
+ * <pre>
+ * type ::= ... | classtype | methodtype | typevar
+ * classtype ::= classsig { '.' classsig }
+ * classig ::= 'L' name [typeargs] ';'
+ * methodtype ::= [ typeparams ] '(' { type } ')' type
+ * typevar ::= 'T' name ';'
+ * typeargs ::= '<' type { type } '>'
+ * typeparams ::= '<' typeparam { typeparam } '>'
+ * typeparam ::= name ':' type
+ * </pre>
+ * <p>This class defines constants used in class files as well
+ * as routines to convert between internal ``.'' and external ``/''
+ * separators in class names.
+ *
+ * <p><b>This is NOT part of any API supported by Sun Microsystems. If
+ * you write code that depends on this, you do so at your own risk.
+ * This code and its internal interfaces are subject to change or
+ * deletion without notice.</b> */
+public class ClassFile {
+
+ public final static int JAVA_MAGIC = 0xCAFEBABE;
+
+ // see Target
+ public final static int CONSTANT_Utf8 = 1;
+ public final static int CONSTANT_Unicode = 2;
+ public final static int CONSTANT_Integer = 3;
+ public final static int CONSTANT_Float = 4;
+ public final static int CONSTANT_Long = 5;
+ public final static int CONSTANT_Double = 6;
+ public final static int CONSTANT_Class = 7;
+ public final static int CONSTANT_String = 8;
+ public final static int CONSTANT_Fieldref = 9;
+ public final static int CONSTANT_Methodref = 10;
+ public final static int CONSTANT_InterfaceMethodref = 11;
+ public final static int CONSTANT_NameandType = 12;
+
+ public final static int MAX_PARAMETERS = 0xff;
+ public final static int MAX_DIMENSIONS = 0xff;
+ public final static int MAX_CODE = 0xffff;
+ public final static int MAX_LOCALS = 0xffff;
+ public final static int MAX_STACK = 0xffff;
+
+
+/************************************************************************
+ * String Translation Routines
+ ***********************************************************************/
+
+ /** Return internal representation of buf[offset..offset+len-1],
+ * converting '/' to '.'.
+ */
+ public static byte[] internalize(byte[] buf, int offset, int len) {
+ byte[] translated = new byte[len];
+ for (int j = 0; j < len; j++) {
+ byte b = buf[offset + j];
+ if (b == '/') translated[j] = (byte) '.';
+ else translated[j] = b;
+ }
+ return translated;
+ }
+
+ /** Return internal representation of given name,
+ * converting '/' to '.'.
+ */
+ public static byte[] internalize(Name name) {
+ return internalize(name.table.names, name.index, name.len);
+ }
+
+ /** Return external representation of buf[offset..offset+len-1],
+ * converting '.' to '/'.
+ */
+ public static byte[] externalize(byte[] buf, int offset, int len) {
+ byte[] translated = new byte[len];
+ for (int j = 0; j < len; j++) {
+ byte b = buf[offset + j];
+ if (b == '.') translated[j] = (byte) '/';
+ else translated[j] = b;
+ }
+ return translated;
+ }
+
+ /** Return external representation of given name,
+ * converting '/' to '.'.
+ */
+ public static byte[] externalize(Name name) {
+ return externalize(name.table.names, name.index, name.len);
+ }
+
+/************************************************************************
+ * Name-and-type
+ ***********************************************************************/
+
+ /** A class for the name-and-type signature of a method or field.
+ */
+ public static class NameAndType {
+ Name name;
+ Type type;
+
+ NameAndType(Name name, Type type) {
+ this.name = name;
+ this.type = type;
+ }
+
+ public boolean equals(Object other) {
+ return
+ other instanceof NameAndType &&
+ name == ((NameAndType) other).name &&
+ type.equals(((NameAndType) other).type);
+ }
+
+ public int hashCode() {
+ return name.hashCode() * type.hashCode();
+ }
+ }
+}