/*
    * Copyright 2014 The Netty Project
    *
    * The Netty Project licenses this file to you 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:
    *
    *   https://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 io.netty5.handler.codec.http;
  
  import io.netty5.buffer.api.Buffer;
  
  import static io.netty5.handler.codec.http.HttpConstants.COLON;
  import static io.netty5.handler.codec.http.HttpConstants.SP;
  import static io.netty5.handler.codec.http.HttpObjectEncoder.CRLF_SHORT;
  import static java.nio.charset.StandardCharsets.US_ASCII;
  
  final class HttpHeadersEncoder {
      private static final short COLON_AND_SPACE_SHORT = (COLON << 8) | SP;
  
      private HttpHeadersEncoder() {
      }
  
      static void encoderHeader(CharSequence name, CharSequence value, Buffer buf) {
          final int nameLen = name.length();
          final int valueLen = value.length();
          final int entryLen = nameLen + valueLen + 4;
          buf.ensureWritable(entryLen);
          buf.writeCharSequence(name, US_ASCII);
          buf.writeShort(COLON_AND_SPACE_SHORT);
          buf.writeCharSequence(value, US_ASCII);
          buf.writeShort(CRLF_SHORT);
      }
  }