1/* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include "Registry.h" 18 19#include "Stream.h" 20 21static Registry* gHead = 0; 22static int gHeaderBytesRequired = 0; 23 24Registry::Registry(const RegistryEntry& entry) { 25 mImpl = entry; 26 27 mNext = gHead; 28 gHead = this; 29 30 if (gHeaderBytesRequired < entry.requiredHeaderBytes) { 31 gHeaderBytesRequired = entry.requiredHeaderBytes; 32 } 33} 34 35const RegistryEntry* Registry::Find(Stream* stream) { 36 Registry* registry = gHead; 37 int headerSize = gHeaderBytesRequired; 38 char header[headerSize]; 39 headerSize = stream->peek(header, headerSize); 40 while (registry) { 41 if (headerSize >= registry->mImpl.requiredHeaderBytes 42 && registry->mImpl.checkHeader(header, headerSize)) { 43 return &(registry->mImpl); 44 } 45 registry = registry->mNext; 46 } 47 return 0; 48} 49