Move Status to libhidl.
Bug: 31226252
Change-Id: Ica4772243ca40f43d3077c68cb974066a133303d
diff --git a/Status.cpp b/Status.cpp
new file mode 100644
index 0000000..0a9f513
--- /dev/null
+++ b/Status.cpp
@@ -0,0 +1,167 @@
+/*
+ * Copyright (C) 2015 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 <hidl/Status.h>
+
+namespace android {
+namespace hardware {
+
+Status Status::ok() {
+ return Status();
+}
+
+Status Status::fromExceptionCode(int32_t exceptionCode) {
+ return Status(exceptionCode, OK);
+}
+
+Status Status::fromExceptionCode(int32_t exceptionCode,
+ const String8& message) {
+ return Status(exceptionCode, OK, message);
+}
+
+Status Status::fromServiceSpecificError(int32_t serviceSpecificErrorCode) {
+ return Status(EX_SERVICE_SPECIFIC, serviceSpecificErrorCode);
+}
+
+Status Status::fromServiceSpecificError(int32_t serviceSpecificErrorCode,
+ const String8& message) {
+ return Status(EX_SERVICE_SPECIFIC, serviceSpecificErrorCode, message);
+}
+
+Status Status::fromStatusT(status_t status) {
+ Status ret;
+ ret.setFromStatusT(status);
+ return ret;
+}
+
+Status::Status(int32_t exceptionCode, int32_t errorCode)
+ : mException(exceptionCode),
+ mErrorCode(errorCode) {}
+
+Status::Status(int32_t exceptionCode, int32_t errorCode, const String8& message)
+ : mException(exceptionCode),
+ mErrorCode(errorCode),
+ mMessage(message) {}
+
+status_t Status::readFromParcel(const Parcel& parcel) {
+ status_t status = parcel.readInt32(&mException);
+ if (status != OK) {
+ setFromStatusT(status);
+ return status;
+ }
+
+ // Skip over fat response headers. Not used (or propagated) in native code.
+ if (mException == EX_HAS_REPLY_HEADER) {
+ // Note that the header size includes the 4 byte size field.
+ const int32_t header_start = parcel.dataPosition();
+ int32_t header_size;
+ status = parcel.readInt32(&header_size);
+ if (status != OK) {
+ setFromStatusT(status);
+ return status;
+ }
+ parcel.setDataPosition(header_start + header_size);
+ // And fat response headers are currently only used when there are no
+ // exceptions, so act like there was no error.
+ mException = EX_NONE;
+ }
+
+ if (mException == EX_NONE) {
+ return status;
+ }
+
+ // The remote threw an exception. Get the message back.
+ String16 message;
+ status = parcel.readString16(&message);
+ if (status != OK) {
+ setFromStatusT(status);
+ return status;
+ }
+ mMessage = String8(message);
+
+ if (mException == EX_SERVICE_SPECIFIC) {
+ status = parcel.readInt32(&mErrorCode);
+ }
+ if (status != OK) {
+ setFromStatusT(status);
+ return status;
+ }
+
+ return status;
+}
+
+status_t Status::writeToParcel(Parcel* parcel) const {
+ // Something really bad has happened, and we're not going to even
+ // try returning rich error data.
+ if (mException == EX_TRANSACTION_FAILED) {
+ return mErrorCode;
+ }
+
+ status_t status = parcel->writeInt32(mException);
+ if (status != OK) { return status; }
+ if (mException == EX_NONE) {
+ // We have no more information to write.
+ return status;
+ }
+ status = parcel->writeString16(String16(mMessage));
+ if (mException != EX_SERVICE_SPECIFIC) {
+ // We have no more information to write.
+ return status;
+ }
+ status = parcel->writeInt32(mErrorCode);
+ return status;
+}
+
+void Status::setException(int32_t ex, const String8& message) {
+ mException = ex;
+ mErrorCode = NO_ERROR; // an exception, not a transaction failure.
+ mMessage.setTo(message);
+}
+
+void Status::setServiceSpecificError(int32_t errorCode, const String8& message) {
+ setException(EX_SERVICE_SPECIFIC, message);
+ mErrorCode = errorCode;
+}
+
+void Status::setFromStatusT(status_t status) {
+ mException = (status == NO_ERROR) ? EX_NONE : EX_TRANSACTION_FAILED;
+ mErrorCode = status;
+ mMessage.clear();
+}
+
+String8 Status::toString8() const {
+ String8 ret;
+ if (mException == EX_NONE) {
+ ret.append("No error");
+ } else {
+ ret.appendFormat("Status(%d): '", mException);
+ if (mException == EX_SERVICE_SPECIFIC ||
+ mException == EX_TRANSACTION_FAILED) {
+ ret.appendFormat("%d: ", mErrorCode);
+ }
+ ret.append(String8(mMessage));
+ ret.append("'");
+ }
+ return ret;
+}
+
+std::stringstream& operator<< (std::stringstream& stream, const Status& s) {
+ stream << s.toString8().string();
+ return stream;
+}
+
+} // namespace hardware
+} // namespace android