/*
* Copyright (c) 2013, 2016, 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 com.oracle.truffle.api.source;
import java.io.IOException;
import java.io.Reader;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.Objects;
abstract class Content {
private static final String URI_SCHEME = "truffle";
String code;
private volatile URI uri;
abstract String findMimeType() throws IOException;
abstract Reader getReader() throws IOException;
abstract String getCode();
abstract String getName();
abstract Object getHashKey();
abstract String getPath();
abstract URL getURL();
abstract URI getURI();
@SuppressWarnings("unused")
void appendCode(CharSequence chars) {
throw new UnsupportedOperationException();
}
@Override
public final boolean equals(Object obj) {
if (obj == null || getClass() != obj.getClass()) {
return false;
}
Content other = (Content) obj;
return Objects.equals(getCode(), other.getCode());
}
@Override
public int hashCode() {
return getHashKey().hashCode();
}
protected final URI createURIOnce(CreateURI cu) {
if (uri == null) {
synchronized (this) {
if (uri == null) {
uri = cu.createURI();
}
}
}
return uri;
}
protected final URI getNamedURI(String name) {
return getNamedURI(name, null, 0, 0);
}
protected final URI getNamedURI(String name, byte[] bytes) {
return getNamedURI(name, bytes, 0, bytes.length);
}
protected final URI getNamedURI(String name, byte[] bytes, int byteIndex, int length) {
String digest;
if (bytes != null) {
digest = digest(bytes, byteIndex, length);
} else {
digest = Integer.toString(System.identityHashCode(this), 16);
}
try {
return new URI(URI_SCHEME, digest + '/' + name, null);
} catch (URISyntaxException ex) {
throw new Error(ex); // Should not happen
}
}
protected interface CreateURI {
URI createURI();
}
private static final int[] S = new int[]{
0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 0x3D, 0x36, 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13,
0x62, 0xA7, 0x05, 0xF3, 0xC0, 0xC7, 0x73, 0x8C, 0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C, 0x82, 0xCA,
0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16, 0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12,
0xBE, 0x4E, 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49, 0xA0, 0xFB, 0xF5, 0x8E, 0xBB, 0x2F, 0xEE, 0x7A,
0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2, 0x07, 0x3F, 0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21,
0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27, 0x35, 0x3E, 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03,
0xFF, 0x19, 0x30, 0xB3, 0x48, 0xA5, 0xB5, 0xD1, 0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56, 0xAA, 0xC6,
0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6, 0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1,
0x45, 0x9D, 0x70, 0x59, 0x64, 0x71, 0x87, 0x20, 0x86, 0x5B, 0xCF, 0x65, 0xE6, 0x2D, 0xA8, 0x02,
0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0, 0xB9, 0xF6, 0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F,
0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A, 0xC3, 0x5C, 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26,
0x2C, 0x53, 0x0D, 0x6E, 0x85, 0x28, 0x84, 0x09, 0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81, 0x4D, 0x52,
0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA, 0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A,
0x78, 0x88, 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D, 0xE9, 0xCB, 0xD5, 0xFE, 0x3B, 0x00, 0x1D, 0x39,
0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58, 0xD0, 0xE4, 0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A,
0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A, 0xDB, 0x99, 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14
};
static String digest(byte[] message, int from, int length) {
int[] m = new int[19];
int[] x = new int[48];
int[] c = new int[16];
int t;
int loop = 1;
int start = 0;
int bytes = 0;
for (int i = 0; i < 16; ++i) {
x[i] = c[i] = 0;
}
int last = 0;
int index = from;
m[16] = m[17] = m[18] = 0;
while (loop == 1) {
m[0] = m[16];
m[1] = m[17];
m[2] = m[18];
for (int i = 3; i < 16; i++) {
m[i] = 0;
}
int i;
for (i = start; index < length && i < 16; ++index) {
int code = message[index];
if (code < 0) {
code += 256;
}
m[i++] = code;
}
bytes += i - start;
start = i - 16;
if (index == length && i < 16) {
loop = 2;
t = 16 - (bytes & 15);
for (; i < 16; ++i) {
m[i] = t;
}
}
for (i = 0; i < 16; ++i) {
c[i] ^= S[m[i] ^ last];
last = c[i];
}
for (i = 0; i < loop; ++i) {
int[] mOrC = i == 0 ? m : c;
x[16] = mOrC[0];
x[32] = x[16] ^ x[0];
x[17] = mOrC[1];
x[33] = x[17] ^ x[1];
x[18] = mOrC[2];
x[34] = x[18] ^ x[2];
x[19] = mOrC[3];
x[35] = x[19] ^ x[3];
x[20] = mOrC[4];
x[36] = x[20] ^ x[4];
x[21] = mOrC[5];
x[37] = x[21] ^ x[5];
x[22] = mOrC[6];
x[38] = x[22] ^ x[6];
x[23] = mOrC[7];
x[39] = x[23] ^ x[7];
x[24] = mOrC[8];
x[40] = x[24] ^ x[8];
x[25] = mOrC[9];
x[41] = x[25] ^ x[9];
x[26] = mOrC[10];
x[42] = x[26] ^ x[10];
x[27] = mOrC[11];
x[43] = x[27] ^ x[11];
x[28] = mOrC[12];
x[44] = x[28] ^ x[12];
x[29] = mOrC[13];
x[45] = x[29] ^ x[13];
x[30] = mOrC[14];
x[46] = x[30] ^ x[14];
x[31] = mOrC[15];
x[47] = x[31] ^ x[15];
t = 0;
for (int j = 0; j < 18; ++j) {
for (int k = 0; k < 48; ++k) {
x[k] = t = x[k] ^ S[t];
}
t = (t + j) & 0xFF;
}
}
}
StringBuilder result = new StringBuilder(32);
for (int i = 0; i < 16; ++i) {
final String hex = Integer.toHexString(x[i]);
if (result.length() == 0) {
if (hex.equals("0")) {
continue;
}
} else {
if (hex.length() == 1) {
result.append("0");
}
}
result.append(hex);
}
return result.toString();
}
}