229 lines
8.9 KiB
Java
229 lines
8.9 KiB
Java
/*-
|
|
* Public Domain 2014-2015 MongoDB, Inc.
|
|
* Public Domain 2008-2014 WiredTiger, Inc.
|
|
*
|
|
* This is free and unencumbered software released into the public domain.
|
|
*
|
|
* Anyone is free to copy, modify, publish, use, compile, sell, or
|
|
* distribute this software, either in source code form or as a compiled
|
|
* binary, for any purpose, commercial or non-commercial, and by any
|
|
* means.
|
|
*
|
|
* In jurisdictions that recognize copyright laws, the author or authors
|
|
* of this software dedicate any and all copyright interest in the
|
|
* software to the public domain. We make this dedication for the benefit
|
|
* of the public at large and to the detriment of our heirs and
|
|
* successors. We intend this dedication to be an overt act of
|
|
* relinquishment in perpetuity of all present and future rights to this
|
|
* software under copyright law.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
|
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
package com.wiredtiger.test;
|
|
|
|
import com.wiredtiger.db.PackOutputStream;
|
|
import com.wiredtiger.db.PackInputStream;
|
|
import com.wiredtiger.db.WiredTigerPackingException;
|
|
|
|
import static org.junit.Assert.assertEquals;
|
|
|
|
import org.junit.Test;
|
|
import org.junit.Assert;
|
|
import org.junit.runner.RunWith;
|
|
import org.junit.runners.JUnit4;
|
|
|
|
public class PackTest03 {
|
|
|
|
public interface PackingAdaptor {
|
|
public void addval(PackOutputStream packer, long val);
|
|
public long getval(PackInputStream unpacker);
|
|
}
|
|
public static class Scenario {
|
|
public Scenario(String format, long low, long high, int nbits,
|
|
PackingAdaptor a) {
|
|
this.format = format;
|
|
this.low = low;
|
|
this.high = high;
|
|
this.nbits = nbits;
|
|
if (format.equals("Q"))
|
|
this.mask = -1L;
|
|
else if (low == 0) // unsigned
|
|
this.mask = (1L << nbits) - 1;
|
|
else // signed - preserve the sign and lose one of the lower bits
|
|
this.mask = (1L << (nbits - 1)) - 1;
|
|
this.adaptor = a;
|
|
}
|
|
public String format;
|
|
public long low;
|
|
public long high;
|
|
public int nbits;
|
|
public long mask;
|
|
public PackingAdaptor adaptor;
|
|
}
|
|
public static final Scenario scenarios[] = {
|
|
new Scenario("b", -128, 127, 8, new PackingAdaptor() {
|
|
public void addval(PackOutputStream packer, long val) {
|
|
packer.addByte((byte)val); }
|
|
public long getval(PackInputStream unpacker) {
|
|
return unpacker.getByte();
|
|
}
|
|
}),
|
|
new Scenario("B", 0, 255, 8, new PackingAdaptor() {
|
|
public void addval(PackOutputStream packer, long val) {
|
|
packer.addByte((byte)val); }
|
|
public long getval(PackInputStream unpacker) {
|
|
return unpacker.getByte();
|
|
}
|
|
}),
|
|
new Scenario("h", -32768, 32767, 16, new PackingAdaptor() {
|
|
public void addval(PackOutputStream packer, long val) {
|
|
packer.addShort((short)val); }
|
|
public long getval(PackInputStream unpacker) {
|
|
return unpacker.getShort();
|
|
}
|
|
}),
|
|
/*
|
|
* Note: high should be 65535, there's not currently a way to insert
|
|
* unsigned shorts between 2^15 and 2^16.
|
|
*/
|
|
new Scenario("H", 0, 32767, 16, new PackingAdaptor() {
|
|
public void addval(PackOutputStream packer, long val) {
|
|
packer.addShort((short)val); }
|
|
public long getval(PackInputStream unpacker) {
|
|
return unpacker.getShort();
|
|
}
|
|
}),
|
|
new Scenario("i", -2147483648, 2147483647, 32, new PackingAdaptor() {
|
|
public void addval(PackOutputStream packer, long val) {
|
|
packer.addInt((int)val); }
|
|
public long getval(PackInputStream unpacker) {
|
|
return unpacker.getInt();
|
|
}
|
|
}),
|
|
/*
|
|
* Note: high should be 4294967295L, there's not currently a way to
|
|
* insert unsigned ints between 2^31 and 2^32.
|
|
*/
|
|
new Scenario("I", 0, 2147483647L, 32, new PackingAdaptor() {
|
|
public void addval(PackOutputStream packer, long val) {
|
|
packer.addInt((int)val); }
|
|
public long getval(PackInputStream unpacker) {
|
|
return unpacker.getInt();
|
|
}
|
|
}),
|
|
new Scenario("q", -9223372036854775808L,
|
|
9223372036854775807L, 64, new PackingAdaptor() {
|
|
public void addval(PackOutputStream packer, long val) {
|
|
packer.addLong(val); }
|
|
public long getval(PackInputStream unpacker) {
|
|
return unpacker.getLong();
|
|
}
|
|
}),
|
|
|
|
/* 'unsigned long' numbers larger than 2^63 cannot be
|
|
* expressed in Java (except indirectly as negative numbers).
|
|
*/
|
|
new Scenario("Q", 0, -1L, 64, new PackingAdaptor() {
|
|
public void addval(PackOutputStream packer, long val) {
|
|
packer.addLong(val); }
|
|
public long getval(PackInputStream unpacker) {
|
|
return unpacker.getLong();
|
|
}
|
|
}),
|
|
};
|
|
|
|
void tryPackSingle(Scenario scen, long value)
|
|
throws WiredTigerPackingException {
|
|
if ((value < scen.low || value > scen.high) && scen.low < scen.high)
|
|
throw new IllegalArgumentException("value out of range: " + value);
|
|
|
|
PackOutputStream packer = new PackOutputStream(scen.format);
|
|
scen.adaptor.addval(packer, value);
|
|
byte[] bytes = packer.getValue();
|
|
PackInputStream unpacker =
|
|
new PackInputStream(scen.format, packer.getValue());
|
|
//long unpacked = scen.adaptor.getval(unpacker) & scen.mask;
|
|
long unpacked = scen.adaptor.getval(unpacker);
|
|
if (scen.low < 0 && unpacked < 0) {
|
|
unpacked = (unpacked & scen.mask) | ~scen.mask;
|
|
}
|
|
else {
|
|
unpacked = unpacked & scen.mask;
|
|
}
|
|
if (value != unpacked) {
|
|
String arg = "ERROR: format " + scen.format + ": wanted=" +
|
|
value + " did not match got=" + unpacked;
|
|
System.out.println(arg);
|
|
throw new IllegalArgumentException(arg);
|
|
}
|
|
}
|
|
|
|
void tryPackRange(Scenario scen, long lowRange, long highRange)
|
|
throws WiredTigerPackingException {
|
|
if (lowRange < scen.low)
|
|
lowRange = scen.low;
|
|
if (highRange > scen.high && scen.high != -1L)
|
|
highRange = scen.high;
|
|
for (long val = lowRange; val <= highRange; val++) {
|
|
try {
|
|
tryPackSingle(scen, val);
|
|
}
|
|
catch (Exception ex) {
|
|
System.out.println("EXCEPTION: format " + scen.format +
|
|
": value: " + val + ": " + ex);
|
|
throw ex;
|
|
}
|
|
// watch for long overflow
|
|
if (val == Long.MAX_VALUE)
|
|
break;
|
|
}
|
|
}
|
|
|
|
// A debug helper method
|
|
private void printByteArray(byte[] bytes, int len) {
|
|
for (int i = 0; i < len; i++) {
|
|
System.out.println(String.format(
|
|
"\t%8s", Integer.toBinaryString(
|
|
bytes[i] & 0xff)).replace(' ', '0'));
|
|
}
|
|
}
|
|
|
|
@Test
|
|
public void packUnpackRanges()
|
|
throws WiredTigerPackingException {
|
|
// Do a comprehensive test of packing for various formats.
|
|
// Based on test suite's test_intpack.py
|
|
long imin = Integer.MIN_VALUE;
|
|
long imax = Integer.MAX_VALUE;
|
|
long e32 = 1L << 32;
|
|
long lmin = Long.MIN_VALUE;
|
|
long lmax = Long.MAX_VALUE;
|
|
|
|
for (int scenidx = 0; scenidx < scenarios.length; scenidx++) {
|
|
Scenario scen = scenarios[scenidx];
|
|
tryPackRange(scen, -100000, 100000);
|
|
tryPackRange(scen, imin - 100, imin + 100);
|
|
tryPackRange(scen, imax - 100, imax + 100);
|
|
tryPackRange(scen, -e32 - 100, -e32 + 100);
|
|
tryPackRange(scen, e32 - 100, e32 + 100);
|
|
tryPackRange(scen, lmin, lmin + 100);
|
|
tryPackRange(scen, lmax - 100, lmax);
|
|
}
|
|
}
|
|
|
|
public static void main(String[] args) {
|
|
PackTest03 tester = new PackTest03();
|
|
try {
|
|
tester.packUnpackRanges();
|
|
} catch (WiredTigerPackingException wtpe) {
|
|
System.err.println("Packing exception: " + wtpe);
|
|
}
|
|
}
|
|
}
|