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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.slime;
import com.yahoo.compress.Compressor;
import java.nio.charset.Charset;
final class BufferedOutput {
private byte[] buf;
private int capacity;
private int pos;
BufferedOutput(int cap) {
capacity = Math.max(cap, 64);
buf = new byte[capacity];
}
BufferedOutput() {
this(4096);
}
void reset() {
pos = 0;
}
private void reserve(int bytes) {
if (pos + bytes > capacity) {
while (pos + bytes > capacity) {
capacity = capacity * 2;
}
byte[] tmp = new byte[capacity];
System.arraycopy(buf, 0, tmp, 0, pos);
buf = tmp;
}
}
int position() { return pos; }
void put(byte b) {
reserve(1);
buf[pos++] = b;
}
void absolutePut(int position, byte b) {
buf[position] = b;
}
void put(byte[] bytes) {
reserve(bytes.length);
for (byte b : bytes) {
buf[pos++] = b;
}
}
byte[] toArray() {
byte[] ret = new byte[pos];
System.arraycopy(buf, 0, ret, 0, pos);
return ret;
}
public String toString(Charset charset) {
return new String(buf, 0, pos, charset);
}
Compressor.Compression compress(Compressor compressor) {
return compressor.compress(buf, pos);
}
}
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