Add fabricated RRO generation to libidmap2

Fabricated Runtime Resource Overlays are overlays that are generated
at runtime and are stored in the data/ partition.

The system can fabricate RROs at runtime to dynamically theme the
device. Idmaps can now be created from APK RROs and fabricated RROs.

Rather than operating on ApkAssets, libidmap2 now operates on abstract
resource "containers" that supply resource values. Target resource
containers implement methods needed to query overlayable and target
overlay information. Currently only APKs can be loaded as target
resource containers. Overlay resource containers implement methods to
supply the mapping of target resource to overlay value and other
overlay information.

The format of a fabricated RRO is as follows:
0x00 - 0x04 : fabricated overlay magic (always FRRO)
0x04 - 0x08 : file format version
0x08 - 0x0c : crc of version + proto data
0x0c - EOF  : proto fabricated overlay data

The magic is used to quickly detect if the file is a fabricated overlay.
The version is incremented whenever backwards incompatible changes are
made to the proto file format. Idmap must always be able to upgrade
fabricated overlays from previous versions to new versions, so all
previous versions must be checked into the tree.

Bug: 172471315
Test: libidmap2_tests && libandroidfw_tests
Change-Id: I4c9f29da278672e5695fb57d131a44c11a835180

1 files changed, 0 insertions, 70 deletions

diff --git a/cmds/idmap2/libidmap2/ZipFile.cpp b/cmds/idmap2/libidmap2/ZipFile.cpp
deleted file mode 100644
index 1e1a218163f0..000000000000
--- a/cmds/idmap2/libidmap2/ZipFile.cpp
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "idmap2/ZipFile.h"
-
-#include <memory>
-#include <string>
-
-#include "idmap2/Result.h"
-
-namespace android::idmap2 {
-
-std::unique_ptr<MemoryChunk> MemoryChunk::Allocate(size_t size) {
-  void* ptr = ::operator new(sizeof(MemoryChunk) + size);
-  std::unique_ptr<MemoryChunk> chunk(reinterpret_cast<MemoryChunk*>(ptr));
-  chunk->size = size;
-  return chunk;
-}
-
-std::unique_ptr<const ZipFile> ZipFile::Open(const std::string& path) {
-  ::ZipArchiveHandle handle;
-  int32_t status = ::OpenArchive(path.c_str(), &handle);
-  if (status != 0) {
-    ::CloseArchive(handle);
-    return nullptr;
-  }
-  return std::unique_ptr<ZipFile>(new ZipFile(handle));
-}
-
-ZipFile::~ZipFile() {
-  ::CloseArchive(handle_);
-}
-
-std::unique_ptr<const MemoryChunk> ZipFile::Uncompress(const std::string& entryPath) const {
-  ::ZipEntry entry;
-  int32_t status = ::FindEntry(handle_, entryPath, &entry);
-  if (status != 0) {
-    return nullptr;
-  }
-  std::unique_ptr<MemoryChunk> chunk = MemoryChunk::Allocate(entry.uncompressed_length);
-  status = ::ExtractToMemory(handle_, &entry, chunk->buf, chunk->size);
-  if (status != 0) {
-    return nullptr;
-  }
-  return chunk;
-}
-
-Result<uint32_t> ZipFile::Crc(const std::string& entryPath) const {
-  ::ZipEntry entry;
-  int32_t status = ::FindEntry(handle_, entryPath, &entry);
-  if (status != 0) {
-    return Error("failed to find zip entry %s", entryPath.c_str());
-  }
-  return entry.crc32;
-}
-
-}  // namespace android::idmap2