1 files changed, 58 insertions, 0 deletions
diff --git a/libs/protoutil/src/protobuf.cpp b/libs/protoutil/src/protobuf.cpp
new file mode 100644
index 000000000000..ec5325c57bd1
--- /dev/null
+++ b/libs/protoutil/src/protobuf.cpp
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2016 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 <android/util/protobuf.h>
+
+namespace android {
+namespace util {
+
+uint8_t
+read_wire_type(uint32_t varint)
+{
+    return (uint8_t) (varint & 0x07);
+}
+
+uint32_t
+read_field_id(uint32_t varint)
+{
+    return varint >> 3;
+}
+
+uint8_t*
+write_raw_varint(uint8_t* buf, uint32_t val)
+{
+    uint8_t* p = buf;
+    while (true) {
+        if ((val & ~0x7F) == 0) {
+            *p++ = (uint8_t)val;
+            return p;
+        } else {
+            *p++ = (uint8_t)((val & 0x7F) | 0x80);
+            val >>= 7;
+        }
+    }
+}
+
+uint8_t*
+write_length_delimited_tag_header(uint8_t* buf, uint32_t fieldId, size_t size)
+{
+    buf = write_raw_varint(buf, (fieldId << 3) | 2);
+    buf = write_raw_varint(buf, size);
+    return buf;
+}
+
+} // util
+} // android