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/*
* Copyright (C) 2017 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.
*/
package android.util.proto;
import android.util.AggStats;
import android.util.Duration;
import java.io.IOException;
/**
* This class contains a list of helper functions to write common proto in
* //frameworks/base/core/proto/android/base directory
*/
public class ProtoUtils {
/**
* Dump AggStats to ProtoOutputStream
* @hide
*/
public static void toAggStatsProto(ProtoOutputStream proto, long fieldId,
long min, long average, long max) {
final long aggStatsToken = proto.start(fieldId);
proto.write(AggStats.MIN, min);
proto.write(AggStats.AVERAGE, average);
proto.write(AggStats.MAX, max);
proto.end(aggStatsToken);
}
/**
* Dump Duration to ProtoOutputStream
* @hide
*/
public static void toDuration(ProtoOutputStream proto, long fieldId, long startMs, long endMs) {
final long token = proto.start(fieldId);
proto.write(Duration.START_MS, startMs);
proto.write(Duration.END_MS, endMs);
proto.end(token);
}
/**
* Helper function to write bit-wise flags to proto as repeated enums
* @hide
*/
public static void writeBitWiseFlagsToProtoEnum(ProtoOutputStream proto, long fieldId,
int flags, int[] origEnums, int[] protoEnums) {
if (protoEnums.length != origEnums.length) {
throw new IllegalArgumentException("The length of origEnums must match protoEnums");
}
int len = origEnums.length;
for (int i = 0; i < len; i++) {
// handle zero flag case.
if (origEnums[i] == 0 && flags == 0) {
proto.write(fieldId, protoEnums[i]);
return;
}
if ((flags & origEnums[i]) != 0) {
proto.write(fieldId, protoEnums[i]);
}
}
}
/**
* Provide debug data about the current field as a string
*/
public static String currentFieldToString(ProtoInputStream proto) throws IOException {
StringBuilder sb = new StringBuilder();
final int fieldNumber = proto.getFieldNumber();
final int wireType = proto.getWireType();
long fieldConstant;
sb.append("Offset : 0x" + Integer.toHexString(proto.getOffset()));
sb.append("\nField Number : 0x" + Integer.toHexString(proto.getFieldNumber()));
sb.append("\nWire Type : ");
switch (wireType) {
case ProtoStream.WIRE_TYPE_VARINT:
sb.append("varint");
fieldConstant = ProtoStream.makeFieldId(fieldNumber,
ProtoStream.FIELD_COUNT_SINGLE | ProtoStream.FIELD_TYPE_INT64);
sb.append("\nField Value : 0x" + Long.toHexString(proto.readLong(fieldConstant)));
break;
case ProtoStream.WIRE_TYPE_FIXED64:
sb.append("fixed64");
fieldConstant = ProtoStream.makeFieldId(fieldNumber,
ProtoStream.FIELD_COUNT_SINGLE | ProtoStream.FIELD_TYPE_FIXED64);
sb.append("\nField Value : 0x" + Long.toHexString(proto.readLong(fieldConstant)));
break;
case ProtoStream.WIRE_TYPE_LENGTH_DELIMITED:
sb.append("length delimited");
fieldConstant = ProtoStream.makeFieldId(fieldNumber,
ProtoStream.FIELD_COUNT_SINGLE | ProtoStream.FIELD_TYPE_BYTES);
sb.append("\nField Bytes : " + proto.readBytes(fieldConstant));
break;
case ProtoStream.WIRE_TYPE_START_GROUP:
sb.append("start group");
break;
case ProtoStream.WIRE_TYPE_END_GROUP:
sb.append("end group");
break;
case ProtoStream.WIRE_TYPE_FIXED32:
sb.append("fixed32");
fieldConstant = ProtoStream.makeFieldId(fieldNumber,
ProtoStream.FIELD_COUNT_SINGLE | ProtoStream.FIELD_TYPE_FIXED32);
sb.append("\nField Value : 0x" + Integer.toHexString(proto.readInt(fieldConstant)));
break;
default:
sb.append("unknown(" + proto.getWireType() + ")");
}
return sb.toString();
}
}
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