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