1 files changed, 67 insertions, 0 deletions
diff --git a/cmds/idmap2/libidmap2/ZipFile.cpp b/cmds/idmap2/libidmap2/ZipFile.cpp
new file mode 100644
index 000000000000..3f2079a380d6
--- /dev/null
+++ b/cmds/idmap2/libidmap2/ZipFile.cpp
@@ -0,0 +1,67 @@
+/*
+ * 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 <memory>
+#include <string>
+#include <utility>
+
+#include "idmap2/ZipFile.h"
+
+namespace android {
+namespace 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) {
+    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_, ::ZipString(entryPath.c_str()), &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;
+}
+
+std::pair<bool, uint32_t> ZipFile::Crc(const std::string& entryPath) const {
+  ::ZipEntry entry;
+  int32_t status = ::FindEntry(handle_, ::ZipString(entryPath.c_str()), &entry);
+  return std::make_pair(status == 0, entry.crc32);
+}
+
+}  // namespace idmap2
+}  // namespace android