80 lines
2.4 KiB
C++
80 lines
2.4 KiB
C++
/*
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* Copyright (C) 2018 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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#include "idmap2/BinaryStreamVisitor.h"
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#include <algorithm>
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#include <cstring>
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#include <string>
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#include "android-base/macros.h"
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namespace android::idmap2 {
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void BinaryStreamVisitor::Write16(uint16_t value) {
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uint16_t x = htodl(value);
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stream_.write(reinterpret_cast<char*>(&x), sizeof(uint16_t));
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}
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void BinaryStreamVisitor::Write32(uint32_t value) {
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uint32_t x = htodl(value);
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stream_.write(reinterpret_cast<char*>(&x), sizeof(uint32_t));
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}
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void BinaryStreamVisitor::WriteString(const StringPiece& value) {
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char buf[kIdmapStringLength];
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memset(buf, 0, sizeof(buf));
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memcpy(buf, value.data(), std::min(value.size(), sizeof(buf)));
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stream_.write(buf, sizeof(buf));
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}
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void BinaryStreamVisitor::visit(const Idmap& idmap ATTRIBUTE_UNUSED) {
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// nothing to do
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}
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void BinaryStreamVisitor::visit(const IdmapHeader& header) {
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Write32(header.GetMagic());
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Write32(header.GetVersion());
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Write32(header.GetTargetCrc());
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Write32(header.GetOverlayCrc());
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WriteString(header.GetTargetPath());
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WriteString(header.GetOverlayPath());
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}
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void BinaryStreamVisitor::visit(const IdmapData& data ATTRIBUTE_UNUSED) {
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// nothing to do
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}
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void BinaryStreamVisitor::visit(const IdmapData::Header& header) {
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Write16(header.GetTargetPackageId());
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Write16(header.GetTypeCount());
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}
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void BinaryStreamVisitor::visit(const IdmapData::TypeEntry& type_entry) {
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const uint16_t entryCount = type_entry.GetEntryCount();
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Write16(type_entry.GetTargetTypeId());
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Write16(type_entry.GetOverlayTypeId());
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Write16(entryCount);
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Write16(type_entry.GetEntryOffset());
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for (uint16_t i = 0; i < entryCount; i++) {
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EntryId entry_id = type_entry.GetEntry(i);
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Write32(entry_id != kNoEntry ? static_cast<uint32_t>(entry_id) : kPadding);
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}
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}
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} // namespace android::idmap2
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