ce5e56e243
Use Google3 naming style to match new projects' and open source google projects' style. Preferred to do this in a massive CL so as to avoid style inconsistencies that plague legacy code bases. This is a relatively NEW code base, may as well keep it up to date. Test: name/style refactor - existing tests pass Change-Id: Ie80ecb78d46ec53efdfca2336bb57d96cbb7fb87
127 lines
3.4 KiB
C++
127 lines
3.4 KiB
C++
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef AAPT_RES_CHUNK_PULL_PARSER_H
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#define AAPT_RES_CHUNK_PULL_PARSER_H
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#include <string>
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#include "android-base/macros.h"
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#include "androidfw/ResourceTypes.h"
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#include "util/Util.h"
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namespace aapt {
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/**
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* A pull parser, modeled after XmlPullParser, that reads
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* android::ResChunk_header structs from a block of data.
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*
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* An android::ResChunk_header specifies a type, headerSize,
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* and size. The pull parser will verify that the chunk's size
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* doesn't extend beyond the available data, and will iterate
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* over each chunk in the given block of data.
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*
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* Processing nested chunks is done by creating a new ResChunkPullParser
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* pointing to the data portion of a chunk.
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*/
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class ResChunkPullParser {
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public:
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enum class Event {
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kStartDocument,
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kEndDocument,
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kBadDocument,
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kChunk,
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};
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/**
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* Returns false if the event is EndDocument or BadDocument.
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*/
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static bool IsGoodEvent(Event event);
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/**
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* Create a ResChunkPullParser to read android::ResChunk_headers
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* from the memory pointed to by data, of len bytes.
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*/
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ResChunkPullParser(const void* data, size_t len);
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Event event() const;
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const std::string& error() const;
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const android::ResChunk_header* chunk() const;
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/**
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* Move to the next android::ResChunk_header.
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*/
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Event Next();
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private:
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DISALLOW_COPY_AND_ASSIGN(ResChunkPullParser);
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Event event_;
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const android::ResChunk_header* data_;
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size_t len_;
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const android::ResChunk_header* current_chunk_;
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std::string error_;
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};
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template <typename T>
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inline static const T* ConvertTo(const android::ResChunk_header* chunk) {
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if (util::DeviceToHost16(chunk->headerSize) < sizeof(T)) {
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return nullptr;
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}
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return reinterpret_cast<const T*>(chunk);
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}
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inline static const uint8_t* GetChunkData(
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const android::ResChunk_header* chunk) {
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return reinterpret_cast<const uint8_t*>(chunk) +
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util::DeviceToHost16(chunk->headerSize);
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}
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inline static uint32_t GetChunkDataLen(const android::ResChunk_header* chunk) {
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return util::DeviceToHost32(chunk->size) -
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util::DeviceToHost16(chunk->headerSize);
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}
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//
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// Implementation
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//
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inline bool ResChunkPullParser::IsGoodEvent(ResChunkPullParser::Event event) {
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return event != Event::kEndDocument && event != Event::kBadDocument;
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}
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inline ResChunkPullParser::ResChunkPullParser(const void* data, size_t len)
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: event_(Event::kStartDocument),
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data_(reinterpret_cast<const android::ResChunk_header*>(data)),
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len_(len),
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current_chunk_(nullptr) {}
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inline ResChunkPullParser::Event ResChunkPullParser::event() const {
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return event_;
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}
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inline const std::string& ResChunkPullParser::error() const { return error_; }
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inline const android::ResChunk_header* ResChunkPullParser::chunk() const {
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return current_chunk_;
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}
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} // namespace aapt
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#endif // AAPT_RES_CHUNK_PULL_PARSER_H
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