rt/emul/mini/src/main/java/org/apidesign/bck2brwsr/emul/lang/ManifestInputStream.java
1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/rt/emul/mini/src/main/java/org/apidesign/bck2brwsr/emul/lang/ManifestInputStream.java Tue Feb 26 16:54:16 2013 +0100
1.3 @@ -0,0 +1,228 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +package org.apidesign.bck2brwsr.emul.lang;
1.29 +
1.30 +import java.io.FilterInputStream;
1.31 +import java.io.IOException;
1.32 +import java.io.InputStream;
1.33 +
1.34 +/*
1.35 + * A fast buffered input stream for parsing manifest files.
1.36 + *
1.37 + * Taken from java.util.jar.Manifest.FastInputStream and modified to be
1.38 + * independent of other Manifest functionality.
1.39 + */
1.40 +public abstract class ManifestInputStream extends FilterInputStream {
1.41 + private byte[] buf;
1.42 + private int count = 0;
1.43 + private int pos = 0;
1.44 +
1.45 + protected ManifestInputStream(InputStream in) {
1.46 + this(in, 8192);
1.47 + }
1.48 +
1.49 + protected ManifestInputStream(InputStream in, int size) {
1.50 + super(in);
1.51 + buf = new byte[size];
1.52 + }
1.53 +
1.54 + public int read() throws IOException {
1.55 + if (pos >= count) {
1.56 + fill();
1.57 + if (pos >= count) {
1.58 + return -1;
1.59 + }
1.60 + }
1.61 + return buf[pos++] & 0xff;
1.62 + }
1.63 +
1.64 + public int read(byte[] b, int off, int len) throws IOException {
1.65 + int avail = count - pos;
1.66 + if (avail <= 0) {
1.67 + if (len >= buf.length) {
1.68 + return in.read(b, off, len);
1.69 + }
1.70 + fill();
1.71 + avail = count - pos;
1.72 + if (avail <= 0) {
1.73 + return -1;
1.74 + }
1.75 + }
1.76 + if (len > avail) {
1.77 + len = avail;
1.78 + }
1.79 + System.arraycopy(buf, pos, b, off, len);
1.80 + pos += len;
1.81 + return len;
1.82 + }
1.83 +
1.84 + /*
1.85 + * Reads 'len' bytes from the input stream, or until an end-of-line
1.86 + * is reached. Returns the number of bytes read.
1.87 + */
1.88 + public int readLine(byte[] b, int off, int len) throws IOException {
1.89 + byte[] tbuf = this.buf;
1.90 + int total = 0;
1.91 + while (total < len) {
1.92 + int avail = count - pos;
1.93 + if (avail <= 0) {
1.94 + fill();
1.95 + avail = count - pos;
1.96 + if (avail <= 0) {
1.97 + return -1;
1.98 + }
1.99 + }
1.100 + int n = len - total;
1.101 + if (n > avail) {
1.102 + n = avail;
1.103 + }
1.104 + int tpos = pos;
1.105 + int maxpos = tpos + n;
1.106 + while (tpos < maxpos && tbuf[tpos++] != '\n') {
1.107 + ;
1.108 + }
1.109 + n = tpos - pos;
1.110 + System.arraycopy(tbuf, pos, b, off, n);
1.111 + off += n;
1.112 + total += n;
1.113 + pos = tpos;
1.114 + if (tbuf[tpos - 1] == '\n') {
1.115 + break;
1.116 + }
1.117 + }
1.118 + return total;
1.119 + }
1.120 +
1.121 + public byte peek() throws IOException {
1.122 + if (pos == count) {
1.123 + fill();
1.124 + }
1.125 + if (pos == count) {
1.126 + return -1; // nothing left in buffer
1.127 + }
1.128 + return buf[pos];
1.129 + }
1.130 +
1.131 + public int readLine(byte[] b) throws IOException {
1.132 + return readLine(b, 0, b.length);
1.133 + }
1.134 +
1.135 + public long skip(long n) throws IOException {
1.136 + if (n <= 0) {
1.137 + return 0;
1.138 + }
1.139 + long avail = count - pos;
1.140 + if (avail <= 0) {
1.141 + return in.skip(n);
1.142 + }
1.143 + if (n > avail) {
1.144 + n = avail;
1.145 + }
1.146 + pos += n;
1.147 + return n;
1.148 + }
1.149 +
1.150 + public int available() throws IOException {
1.151 + return (count - pos) + in.available();
1.152 + }
1.153 +
1.154 + public void close() throws IOException {
1.155 + if (in != null) {
1.156 + in.close();
1.157 + in = null;
1.158 + buf = null;
1.159 + }
1.160 + }
1.161 +
1.162 + private void fill() throws IOException {
1.163 + count = pos = 0;
1.164 + int n = in.read(buf, 0, buf.length);
1.165 + if (n > 0) {
1.166 + count = n;
1.167 + }
1.168 + }
1.169 +
1.170 + protected abstract String putValue(String key, String value);
1.171 +
1.172 + public void readAttributes(byte[] lbuf) throws IOException {
1.173 + ManifestInputStream is = this;
1.174 +
1.175 + String name = null;
1.176 + String value = null;
1.177 + byte[] lastline = null;
1.178 + int len;
1.179 + while ((len = is.readLine(lbuf)) != -1) {
1.180 + boolean lineContinued = false;
1.181 + if (lbuf[--len] != '\n') {
1.182 + throw new IOException("line too long");
1.183 + }
1.184 + if (len > 0 && lbuf[len - 1] == '\r') {
1.185 + --len;
1.186 + }
1.187 + if (len == 0) {
1.188 + break;
1.189 + }
1.190 + int i = 0;
1.191 + if (lbuf[0] == ' ') {
1.192 + if (name == null) {
1.193 + throw new IOException("misplaced continuation line");
1.194 + }
1.195 + lineContinued = true;
1.196 + byte[] buf = new byte[lastline.length + len - 1];
1.197 + System.arraycopy(lastline, 0, buf, 0, lastline.length);
1.198 + System.arraycopy(lbuf, 1, buf, lastline.length, len - 1);
1.199 + if (is.peek() == ' ') {
1.200 + lastline = buf;
1.201 + continue;
1.202 + }
1.203 + value = new String(buf, 0, buf.length, "UTF8");
1.204 + lastline = null;
1.205 + } else {
1.206 + while (lbuf[i++] != ':') {
1.207 + if (i >= len) {
1.208 + throw new IOException("invalid header field");
1.209 + }
1.210 + }
1.211 + if (lbuf[i++] != ' ') {
1.212 + throw new IOException("invalid header field");
1.213 + }
1.214 + name = new String(lbuf, 0, 0, i - 2);
1.215 + if (is.peek() == ' ') {
1.216 + lastline = new byte[len - i];
1.217 + System.arraycopy(lbuf, i, lastline, 0, len - i);
1.218 + continue;
1.219 + }
1.220 + value = new String(lbuf, i, len - i, "UTF8");
1.221 + }
1.222 + try {
1.223 + if ((putValue(name, value) != null) && (!lineContinued)) {
1.224 + throw new IOException("Duplicate name in Manifest: " + name + ".\n" + "Ensure that the manifest does not " + "have duplicate entries, and\n" + "that blank lines separate " + "individual sections in both your\n" + "manifest and in the META-INF/MANIFEST.MF " + "entry in the jar file.");
1.225 + }
1.226 + } catch (IllegalArgumentException e) {
1.227 + throw new IOException("invalid header field name: " + name);
1.228 + }
1.229 + }
1.230 + }
1.231 +}