CacheHashUtils.h

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef CacheHashUtils__h__
#define CacheHashUtils__h__

#include "nsISupports.h"
#include "mozilla/Types.h"
#include "prnetdb.h"
#include "nsPrintfCString.h"

#define LOGSHA1(x) \
    PR_htonl((reinterpret_cast<const uint32_t *>(x))[0]), \
    PR_htonl((reinterpret_cast<const uint32_t *>(x))[1]), \
    PR_htonl((reinterpret_cast<const uint32_t *>(x))[2]), \
    PR_htonl((reinterpret_cast<const uint32_t *>(x))[3]), \
    PR_htonl((reinterpret_cast<const uint32_t *>(x))[4])

#define SHA1STRING(x) \
    (nsPrintfCString("%08x%08x%08x%08x%08x", LOGSHA1(x)).get())

namespace mozilla {
namespace net {

class CacheHash : public nsISupports
{
public:
  NS_DECL_THREADSAFE_ISUPPORTS

  typedef uint16_t Hash16_t;
  typedef uint32_t Hash32_t;

  static Hash32_t Hash(const char* aData, uint32_t aSize, uint32_t aInitval=0);
  static Hash16_t Hash16(const char* aData, uint32_t aSize,
                         uint32_t aInitval=0);

  explicit CacheHash(uint32_t aInitval=0);

  void     Update(const char *aData, uint32_t aLen);
  Hash32_t GetHash();
  Hash16_t GetHash16();

private:
  virtual ~CacheHash() {}

  void Feed(uint32_t aVal, uint8_t aLen = 4);

  uint32_t mA, mB, mC;
  uint8_t  mPos;
  uint32_t mBuf;
  uint8_t  mBufPos;
  uint32_t mLength;
  bool     mFinalized;
};


} // net
} // mozilla

#endif