content: /*
   * Copyright 2021-2024 Aklivity Inc.
   *
   * Aklivity 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:
   *
   *   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 io.aklivity.zilla.runtime.binding.http.internal.util;
  
  import org.agrona.DirectBuffer;
  
  public final class BufferUtil
  {
      public static int indexOfByte(
          DirectBuffer buffer,
          int offset,
          int limit,
          byte value)
      {
          for (int cursor = offset; cursor < limit; cursor++)
          {
              if (buffer.getByte(cursor) == value)
              {
                  return cursor;
              }
          }
  
          return -1;
      }
  
      public static int limitOfBytes(
          DirectBuffer buffer,
          int offset,
          int limit,
          byte[] value)
      {
          int matchedBytes = 0;
  
          for (int cursor = offset; cursor < limit; cursor++)
          {
              if (buffer.getByte(cursor) != value[matchedBytes])
              {
                  matchedBytes = 0;
                  continue;
              }
  
              if (value.length == ++matchedBytes)
              {
                  return cursor + 1;
              }
          }
  
          return -1;
      }
  
      public static int limitOfBytes(
              DirectBuffer fragment,
              int offset1,
              int limit1,
              DirectBuffer buffer,
              int offset2,
              int limit2,
              byte[] value)
      {
          int matchedBytes = 0;
  
          for (int cursor = offset1; cursor < limit1; cursor++)
          {
              if (fragment.getByte(cursor) != value[matchedBytes])
              {
                  matchedBytes = 0;
                  continue;
              }
  
              if (value.length == ++matchedBytes)
              {
                  throw new IllegalArgumentException("Full match found in fragment buffer");
              }
          }
  
          for (int cursor = offset2; cursor < limit2; cursor++)
          {
              if (buffer.getByte(cursor) != value[matchedBytes])
              {
                  matchedBytes = 0;
                  continue;
              }
  
              if (value.length == ++matchedBytes)
              {
                  return cursor + 1;
              }
          }
  
          return -1;
      }
  
  
      private BufferUtil()
      {
          // utility class, no instances
      }
  }
  