1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <binder/Status.h> 18 19 namespace android { 20 namespace binder { 21 22 Status Status::ok() { 23 return Status(); 24 } 25 26 Status Status::fromExceptionCode(int32_t exceptionCode) { 27 return Status(exceptionCode, OK); 28 } 29 30 Status Status::fromExceptionCode(int32_t exceptionCode, 31 const String8& message) { 32 return Status(exceptionCode, OK, message); 33 } 34 35 Status Status::fromExceptionCode(int32_t exceptionCode, 36 const char* message) { 37 return fromExceptionCode(exceptionCode, String8(message)); 38 } 39 40 Status Status::fromServiceSpecificError(int32_t serviceSpecificErrorCode) { 41 return Status(EX_SERVICE_SPECIFIC, serviceSpecificErrorCode); 42 } 43 44 Status Status::fromServiceSpecificError(int32_t serviceSpecificErrorCode, 45 const String8& message) { 46 return Status(EX_SERVICE_SPECIFIC, serviceSpecificErrorCode, message); 47 } 48 49 Status Status::fromServiceSpecificError(int32_t serviceSpecificErrorCode, 50 const char* message) { 51 return fromServiceSpecificError(serviceSpecificErrorCode, String8(message)); 52 } 53 54 Status Status::fromStatusT(status_t status) { 55 Status ret; 56 ret.setFromStatusT(status); 57 return ret; 58 } 59 60 Status::Status(int32_t exceptionCode, int32_t errorCode) 61 : mException(exceptionCode), 62 mErrorCode(errorCode) {} 63 64 Status::Status(int32_t exceptionCode, int32_t errorCode, const String8& message) 65 : mException(exceptionCode), 66 mErrorCode(errorCode), 67 mMessage(message) {} 68 69 status_t Status::readFromParcel(const Parcel& parcel) { 70 status_t status = parcel.readInt32(&mException); 71 if (status != OK) { 72 setFromStatusT(status); 73 return status; 74 } 75 76 // Skip over fat response headers. Not used (or propagated) in native code. 77 if (mException == EX_HAS_REPLY_HEADER) { 78 // Note that the header size includes the 4 byte size field. 79 const int32_t header_start = parcel.dataPosition(); 80 int32_t header_size; 81 status = parcel.readInt32(&header_size); 82 if (status != OK) { 83 setFromStatusT(status); 84 return status; 85 } 86 parcel.setDataPosition(header_start + header_size); 87 // And fat response headers are currently only used when there are no 88 // exceptions, so act like there was no error. 89 mException = EX_NONE; 90 } 91 92 if (mException == EX_NONE) { 93 return status; 94 } 95 96 // The remote threw an exception. Get the message back. 97 String16 message; 98 status = parcel.readString16(&message); 99 if (status != OK) { 100 setFromStatusT(status); 101 return status; 102 } 103 mMessage = String8(message); 104 105 if (mException == EX_SERVICE_SPECIFIC) { 106 status = parcel.readInt32(&mErrorCode); 107 } else if (mException == EX_PARCELABLE) { 108 // Skip over the blob of Parcelable data 109 const int32_t header_start = parcel.dataPosition(); 110 int32_t header_size; 111 status = parcel.readInt32(&header_size); 112 if (status != OK) { 113 setFromStatusT(status); 114 return status; 115 } 116 parcel.setDataPosition(header_start + header_size); 117 } 118 if (status != OK) { 119 setFromStatusT(status); 120 return status; 121 } 122 123 return status; 124 } 125 126 status_t Status::writeToParcel(Parcel* parcel) const { 127 // Something really bad has happened, and we're not going to even 128 // try returning rich error data. 129 if (mException == EX_TRANSACTION_FAILED) { 130 return mErrorCode; 131 } 132 133 status_t status = parcel->writeInt32(mException); 134 if (status != OK) { return status; } 135 if (mException == EX_NONE) { 136 // We have no more information to write. 137 return status; 138 } 139 status = parcel->writeString16(String16(mMessage)); 140 if (mException == EX_SERVICE_SPECIFIC) { 141 status = parcel->writeInt32(mErrorCode); 142 } else if (mException == EX_PARCELABLE) { 143 // Sending Parcelable blobs currently not supported 144 status = parcel->writeInt32(0); 145 } 146 return status; 147 } 148 149 void Status::setException(int32_t ex, const String8& message) { 150 mException = ex; 151 mErrorCode = NO_ERROR; // an exception, not a transaction failure. 152 mMessage.setTo(message); 153 } 154 155 void Status::setServiceSpecificError(int32_t errorCode, const String8& message) { 156 setException(EX_SERVICE_SPECIFIC, message); 157 mErrorCode = errorCode; 158 } 159 160 void Status::setFromStatusT(status_t status) { 161 mException = (status == NO_ERROR) ? EX_NONE : EX_TRANSACTION_FAILED; 162 mErrorCode = status; 163 mMessage.clear(); 164 } 165 166 String8 Status::toString8() const { 167 String8 ret; 168 if (mException == EX_NONE) { 169 ret.append("No error"); 170 } else { 171 ret.appendFormat("Status(%d): '", mException); 172 if (mException == EX_SERVICE_SPECIFIC || 173 mException == EX_TRANSACTION_FAILED) { 174 ret.appendFormat("%d: ", mErrorCode); 175 } 176 ret.append(String8(mMessage)); 177 ret.append("'"); 178 } 179 return ret; 180 } 181 182 std::stringstream& operator<< (std::stringstream& stream, const Status& s) { 183 stream << s.toString8().string(); 184 return stream; 185 } 186 187 } // namespace binder 188 } // namespace android 189
