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 21 static Registry* gHead = 0; 22 static int gHeaderBytesRequired = 0; 23 24 Registry::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 35 const RegistryEntry* Registry::Find(Stream* stream) { 36 Registry* registry = gHead; 37 38 if (stream->getRawBuffer() != NULL) { 39 while (registry) { 40 if (registry->mImpl.acceptsBuffer()) { 41 return &(registry->mImpl); 42 } 43 registry = registry->mNext; 44 } 45 } else { 46 int headerSize = gHeaderBytesRequired; 47 char header[headerSize]; 48 headerSize = stream->peek(header, headerSize); 49 while (registry) { 50 if (headerSize >= registry->mImpl.requiredHeaderBytes 51 && registry->mImpl.checkHeader(header, headerSize)) { 52 return &(registry->mImpl); 53 } 54 registry = registry->mNext; 55 } 56 } 57 return 0; 58 } 59 60
