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      1 /*
      2  * Copyright (C) 2017 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 "proto_util.h"
     18 
     19 #include <google/protobuf/io/zero_copy_stream_impl.h>
     20 
     21 #include <android/util/protobuf.h>
     22 #include <android/util/ProtoOutputStream.h>
     23 #include <android-base/file.h>
     24 
     25 namespace android {
     26 namespace os {
     27 namespace incidentd {
     28 
     29 using namespace android::base;
     30 using namespace android::util;
     31 using google::protobuf::io::FileOutputStream;
     32 
     33 // special section ids
     34 const int FIELD_ID_INCIDENT_HEADER = 1;
     35 
     36 status_t write_header_section(int fd, const uint8_t* buf, size_t bufSize) {
     37     status_t err;
     38 
     39     if (bufSize == 0) {
     40         return NO_ERROR;
     41     }
     42 
     43     err = write_section_header(fd, FIELD_ID_INCIDENT_HEADER, bufSize);
     44     if (err != NO_ERROR) {
     45         return err;
     46     }
     47 
     48     err = WriteFully(fd, buf, bufSize);
     49     if (err != NO_ERROR) {
     50         return err;
     51     }
     52 
     53     return NO_ERROR;
     54 }
     55 
     56 status_t write_section_header(int fd, int sectionId, size_t size) {
     57     uint8_t buf[20];
     58     uint8_t* p = write_length_delimited_tag_header(buf, sectionId, size);
     59     return WriteFully(fd, buf, p - buf) ? NO_ERROR : -errno;
     60 }
     61 
     62 status_t write_section(int fd, int sectionId, const MessageLite& message) {
     63     status_t err;
     64 
     65     err = write_section_header(fd, sectionId, message.ByteSize());
     66     if (err != NO_ERROR) {
     67         return err;
     68     }
     69 
     70     FileOutputStream stream(fd);
     71     if (!message.SerializeToZeroCopyStream(&stream)) {
     72         return stream.GetErrno();
     73     } else {
     74         return NO_ERROR;
     75     }
     76 }
     77 
     78 
     79 
     80 }  // namespace incidentd
     81 }  // namespace os
     82 }  // namespace android
     83 
     84