15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Interface to SHA1 digest computation. 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef GOOGLE_CACHEINVALIDATION_DEPS_SHA1_DIGEST_FUNCTION_H_ 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define GOOGLE_CACHEINVALIDATION_DEPS_SHA1_DIGEST_FUNCTION_H_ 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <string> 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/sha1.h" 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "google/cacheinvalidation/deps/digest-function.h" 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "google/cacheinvalidation/deps/stl-namespace.h" 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace invalidation { 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)using ::INVALIDATION_STL_NAMESPACE::string; 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class Sha1DigestFunction : public DigestFunction { 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Sha1DigestFunction() : reset_needed_(false) {} 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void Reset() { 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) reset_needed_ = false; 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) buffer_.clear(); 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void Update(const string& s) { 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK(!reset_needed_); 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) buffer_.append(s); 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual string GetDigest() { 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK(!reset_needed_); 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) reset_needed_ = true; 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::SHA1HashString(buffer_); 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) string buffer_; 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool reset_needed_; 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace invalidation 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // GOOGLE_CACHEINVALIDATION_DEPS_SHA1_DIGEST_FUNCTION_H_ 48