--- /dev/null 2015-06-23 14:29:13.000000000 +0200 +++ new/src/java.base/share/classes/jdk/internal/jimage/ImageLocationBase.java 2015-06-23 14:29:13.000000000 +0200 @@ -0,0 +1,264 @@ +/* + * Copyright (c) 2014, Oracle and/or its affiliates. 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. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +package jdk.internal.jimage; + +public class ImageLocationBase { + final static int ATTRIBUTE_END = 0; + final static int ATTRIBUTE_MODULE = 1; + final static int ATTRIBUTE_PARENT = 2; + final static int ATTRIBUTE_BASE = 3; + final static int ATTRIBUTE_EXTENSION = 4; + final static int ATTRIBUTE_OFFSET = 5; + final static int ATTRIBUTE_COMPRESSED = 6; + final static int ATTRIBUTE_UNCOMPRESSED = 7; + final static int ATTRIBUTE_COUNT = 8; + + protected final long[] attributes; + + protected final ImageStrings strings; + + protected ImageLocationBase(long[] attributes, ImageStrings strings) { + this.attributes = attributes; + this.strings = strings; + } + + ImageStrings getStrings() { + return strings; + } + + private static int attributeLength(int data) { + return (data & 0x7) + 1; + } + + private static int attributeKind(int data) { + return data >>> 3; + } + + static long[] decompress(byte[] bytes) { + return decompress(bytes, 0); + } + + static long[] decompress(byte[] bytes, int offset) { + long[] attributes = new long[ATTRIBUTE_COUNT]; + + if (bytes != null) { + for (int i = offset; i < bytes.length; ) { + int data = bytes[i++] & 0xFF; + int kind = attributeKind(data); + + if (kind == ATTRIBUTE_END) { + break; + } + + assert ATTRIBUTE_END < kind && + kind < ATTRIBUTE_COUNT : "Invalid attribute kind"; + int length = attributeLength(data); + long value = 0; + + for (int j = 0; j < length; j++) { + value <<= 8; + value |= bytes[i++] & 0xFF; + } + + attributes[kind] = value; + } + } + + return attributes; + } + + static byte[] compress(long[] attributes) { + ImageStream stream = new ImageStream(16); + + for (int kind = ATTRIBUTE_END + 1; kind < ATTRIBUTE_COUNT; kind++) { + long value = attributes[kind]; + + if (value != 0) { + int n = (63 - Long.numberOfLeadingZeros(value)) >> 3; + stream.put((kind << 3) | n); + + for (int i = n; i >= 0; i--) { + stream.put((int)(value >> (i << 3))); + } + } + } + + stream.put(ATTRIBUTE_END << 3); + + return stream.toArray(); + } + + public boolean verify(UTF8String name) { + return UTF8String.equals(getFullName(), name); + } + + protected long getAttribute(int kind) { + assert ATTRIBUTE_END < kind && + kind < ATTRIBUTE_COUNT : "Invalid attribute kind"; + + return attributes[kind]; + } + + protected UTF8String getAttributeUTF8String(int kind) { + assert ATTRIBUTE_END < kind && + kind < ATTRIBUTE_COUNT : "Invalid attribute kind"; + + return getStrings().get((int)attributes[kind]); + } + + protected String getAttributeString(int kind) { + return getAttributeUTF8String(kind).toString(); + } + + UTF8String getModule() { + return getAttributeUTF8String(ATTRIBUTE_MODULE); + } + + public String getModuleString() { + return getModule().toString(); + } + + int getModuleOffset() { + return (int)getAttribute(ATTRIBUTE_MODULE); + } + + UTF8String getBase() { + return getAttributeUTF8String(ATTRIBUTE_BASE); + } + + public String getBaseString() { + return getBase().toString(); + } + + int getBaseOffset() { + return (int)getAttribute(ATTRIBUTE_BASE); + } + + UTF8String getParent() { + return getAttributeUTF8String(ATTRIBUTE_PARENT); + } + + public String getParentString() { + return getParent().toString(); + } + + int getParentOffset() { + return (int)getAttribute(ATTRIBUTE_PARENT); + } + + UTF8String getExtension() { + return getAttributeUTF8String(ATTRIBUTE_EXTENSION); + } + + public String getExtensionString() { + return getExtension().toString(); + } + + int getExtensionOffset() { + return (int)getAttribute(ATTRIBUTE_EXTENSION); + } + + UTF8String getFullName() { + return getFullName(false); + } + + UTF8String getFullName(boolean modulesPrefix) { + // Note: Consider a UTF8StringBuilder. + UTF8String fullName = UTF8String.EMPTY_STRING; + + if (getModuleOffset() != 0) { + fullName = fullName.concat( + // TODO The use of UTF8String.MODULES_STRING does not belong here. + modulesPrefix? UTF8String.MODULES_STRING : + UTF8String.EMPTY_STRING, + UTF8String.SLASH_STRING, + getModule(), + UTF8String.SLASH_STRING); + } + + if (getParentOffset() != 0) { + fullName = fullName.concat(getParent(), + UTF8String.SLASH_STRING); + } + + fullName = fullName.concat(getBase()); + + if (getExtensionOffset() != 0) { + fullName = fullName.concat(UTF8String.DOT_STRING, + getExtension()); + } + + return fullName; + } + + UTF8String buildName(boolean includeModule, boolean includeParent, + boolean includeName) { + // Note: Consider a UTF8StringBuilder. + UTF8String name = UTF8String.EMPTY_STRING; + + if (includeModule && getModuleOffset() != 0) { + name = name.concat(UTF8String.MODULES_STRING, + UTF8String.SLASH_STRING, + getModule()); + } + + if (includeParent && getParentOffset() != 0) { + name = name.concat(UTF8String.SLASH_STRING, + getParent()); + } + + if (includeName) { + if (includeModule || includeParent) { + name = name.concat(UTF8String.SLASH_STRING); + } + + name = name.concat(getBase()); + + if (getExtensionOffset() != 0) { + name = name.concat(UTF8String.DOT_STRING, + getExtension()); + } + } + + return name; + } + + String getFullNameString() { + return getFullName().toString(); + } + + public long getContentOffset() { + return getAttribute(ATTRIBUTE_OFFSET); + } + + public long getCompressedSize() { + return getAttribute(ATTRIBUTE_COMPRESSED); + } + + public long getUncompressedSize() { + return getAttribute(ATTRIBUTE_UNCOMPRESSED); + } +}