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// Copyright 2021 Code Intelligence GmbH
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package test;
import java.nio.charset.Charset;
import java.util.ArrayList;
final class ModifiedUtf8Encoder {
// Encodes a string in the JVM's modified UTF-8 encoding.
static public byte[] encode(String value) {
// Modified UTF-8 is almost the same as CESU-8, the only difference being that the zero
// character is coded on two bytes.
byte[] cesuBytes = value.getBytes(Charset.forName("CESU-8"));
ArrayList<Byte> modifiedUtf8Bytes = new ArrayList<>();
for (byte cesuByte : cesuBytes) {
if (cesuByte != 0) {
modifiedUtf8Bytes.add(cesuByte);
} else {
modifiedUtf8Bytes.add((byte) 0xC0);
modifiedUtf8Bytes.add((byte) 0x80);
}
}
byte[] out = new byte[modifiedUtf8Bytes.size()];
for (int i = 0; i < modifiedUtf8Bytes.size(); i++) {
out[i] = modifiedUtf8Bytes.get(i);
}
return out;
}
}
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