text: /* $Id$
   *
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements. See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF 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.
   */
  
  #ifndef __ETCHHASH_H__
  #define __ETCHHASH_H__
  #include "common/EtchConfig.h"
  #include "common/EtchString.h"
  
  class EtchHashEx {
  public:
  
    static capu::uint32_t Digest(const EtchString& value) {
      capu::uint32_t hash = 5381;
      capu::uint32_t n = value.length();
      const char *str = value.c_str();
      for (capu::uint32_t i = 0; i < n; i++) {
        char c = str[i];
        capu::uint32_t h6 = hash << 6;
        hash = (h6 << 10) + h6 - hash + c;
      }
      return hash;
    }
  };
  
  #endif