1 files changed, 57 insertions, 0 deletions
diff --git a/cmds/idmap2/libidmap2/Policies.cpp b/cmds/idmap2/libidmap2/Policies.cpp
new file mode 100644
index 000000000000..0f87ef0c4ea9
--- /dev/null
+++ b/cmds/idmap2/libidmap2/Policies.cpp
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2019 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 <iterator>
+#include <map>
+#include <sstream>
+#include <string>
+#include <vector>
+
+#include "androidfw/ResourceTypes.h"
+
+#include "idmap2/Idmap.h"
+#include "idmap2/Policies.h"
+#include "idmap2/Result.h"
+
+namespace android::idmap2 {
+
+namespace {
+
+const std::map<android::StringPiece, PolicyFlags> kStringToFlag = {
+    {"public", PolicyFlags::POLICY_PUBLIC},
+    {"product", PolicyFlags::POLICY_PRODUCT_PARTITION},
+    {"system", PolicyFlags::POLICY_SYSTEM_PARTITION},
+    {"vendor", PolicyFlags::POLICY_VENDOR_PARTITION},
+};
+}  // namespace
+
+Result<PolicyBitmask> PoliciesToBitmask(const std::vector<std::string>& policies,
+                                        std::ostream& err) {
+  PolicyBitmask bitmask = 0;
+  for (const std::string& policy : policies) {
+    const auto iter = kStringToFlag.find(policy);
+    if (iter != kStringToFlag.end()) {
+      bitmask |= iter->second;
+    } else {
+      err << "error: unknown policy \"" << policy << "\"";
+      return kResultError;
+    }
+  }
+
+  return Result<PolicyBitmask>(bitmask);
+}
+
+}  // namespace android::idmap2