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variable length tag descriptions (regtest glitches)

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This commit is contained in:
Arndt 2014-05-31 09:44:22 +02:00
parent 1633ae78e3
commit 8368df6bcf
8 changed files with 54 additions and 54 deletions
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16
brouter-util/src/main/java/btools/util/ByteArrayUnifier.java
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@ -3,12 +3,14 @@ package btools.util;
public final class ByteArrayUnifier
{
private byte[][] byteArrayCache;
private int[] crcCrosscheck;
private int size;
public ByteArrayUnifier( int size )
public ByteArrayUnifier( int size, boolean validateImmutability )
{
this.size = size;
byteArrayCache = new byte[size][];
if ( validateImmutability ) crcCrosscheck = new int[size];
}
/**
@ -20,7 +22,7 @@ public final class ByteArrayUnifier
*/
public byte[] unify( byte[] ab )
{
int n = ab.length;
int n = ab.length;
int crc = Crc32.crc( ab, 0, n );
int idx = (crc & 0xfffffff) % size;
byte[] abc = byteArrayCache[idx];
@ -34,6 +36,16 @@ public final class ByteArrayUnifier
}
if ( i == n ) return abc;
}
if ( crcCrosscheck != null )
{
if ( byteArrayCache[idx] != null )
{
byte[] abold = byteArrayCache[idx];
int crcold = Crc32.crc( abold, 0, abold.length );
if ( crcold != crcCrosscheck[idx] ) throw new IllegalArgumentException( "ByteArrayUnifier: immutablity validation failed!" );
}
crcCrosscheck[idx] = crc;
}
byteArrayCache[idx] = ab;
return ab;
}