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Hash.scala
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Hash.scala
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package arqbrowser.lib
import java.io.IOException
import java.io.DataInputStream
import java.io.ByteArrayInputStream
final class Hash(val value: Array[Byte]) extends Ordered[Hash] {
if (value.length != 20) {
throw new RuntimeException("Invalid hash length: %d".format(value.length));
}
override val hashCode: Int =
(new DataInputStream(new ByteArrayInputStream(value, 10, 4))).readInt();
override def compare(other: Hash): Int = {
for ((a, b) <- this.value.toIterable zip other.value.toIterable) {
val r = a compare b;
if (r != 0) {
return r;
}
}
return this.value.length compare other.value.length;
}
override def equals(other: Any): Boolean = {
other match {
case o: Hash => (this compare o) == 0;
case _ => false;
}
}
def toBlockText(): String = {
Utils.bytesToBlockHex(value);
}
override val toString: String =
Utils.bytesToReadableHex(value);
}
object Hash {
def fromString(v: String): Hash = {
if (v.length() != 40) {
throw new IOException("Hash String should be exactly 40 chars.");
}
val r = new Array[Byte](20);
for (i <- 0 until r.length) {
r(i) = Utils.toSignedByte(Integer.parseInt(v.substring(i * 2, (i + 1) * 2), 16));
};
return new Hash(r);
}
}