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
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