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/*
* 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 <binder/Status.h>
namespace android {
namespace binder {
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::fromExceptionCode(int32_t exceptionCode,
const char* message) {
return fromExceptionCode(exceptionCode, String8(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::fromServiceSpecificError(int32_t serviceSpecificErrorCode,
const char* message) {
return fromServiceSpecificError(serviceSpecificErrorCode, String8(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);
// Skip over the remote stack trace data
int32_t remote_stack_trace_header_size;
status = parcel.readInt32(&remote_stack_trace_header_size);
if (status != OK) {
setFromStatusT(status);
return status;
}
parcel.setDataPosition(parcel.dataPosition() + remote_stack_trace_header_size);
if (mException == EX_SERVICE_SPECIFIC) {
status = parcel.readInt32(&mErrorCode);
} else if (mException == EX_PARCELABLE) {
// Skip over the blob of Parcelable data
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);
}
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 == OK ? FAILED_TRANSACTION : 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));
status = parcel->writeInt32(0); // Empty remote stack trace header
if (mException == EX_SERVICE_SPECIFIC) {
status = parcel->writeInt32(mErrorCode);
} else if (mException == EX_PARCELABLE) {
// Sending Parcelable blobs currently not supported
status = parcel->writeInt32(0);
}
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 binder
} // namespace android