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      1 /*
      2  *
      3  * Copyright 2015 gRPC authors.
      4  *
      5  * Licensed under the Apache License, Version 2.0 (the "License");
      6  * you may not use this file except in compliance with the License.
      7  * You may obtain a copy of the License at
      8  *
      9  *     http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  * Unless required by applicable law or agreed to in writing, software
     12  * distributed under the License is distributed on an "AS IS" BASIS,
     13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  * See the License for the specific language governing permissions and
     15  * limitations under the License.
     16  *
     17  */
     18 
     19 #include <grpc/support/port_platform.h>
     20 
     21 #ifdef GPR_ANDROID
     22 
     23 #include <android/log.h>
     24 #include <grpc/support/log.h>
     25 #include <grpc/support/time.h>
     26 #include <stdarg.h>
     27 #include <stdio.h>
     28 #include <string.h>
     29 
     30 static android_LogPriority severity_to_log_priority(gpr_log_severity severity) {
     31   switch (severity) {
     32     case GPR_LOG_SEVERITY_DEBUG:
     33       return ANDROID_LOG_DEBUG;
     34     case GPR_LOG_SEVERITY_INFO:
     35       return ANDROID_LOG_INFO;
     36     case GPR_LOG_SEVERITY_ERROR:
     37       return ANDROID_LOG_ERROR;
     38   }
     39   return ANDROID_LOG_DEFAULT;
     40 }
     41 
     42 void gpr_log(const char* file, int line, gpr_log_severity severity,
     43              const char* format, ...) {
     44   /* Avoid message construction if gpr_log_message won't log */
     45   if (gpr_should_log(severity) == 0) {
     46     return;
     47   }
     48   char* message = NULL;
     49   va_list args;
     50   va_start(args, format);
     51   vasprintf(&message, format, args);
     52   va_end(args);
     53   gpr_log_message(file, line, severity, message);
     54   free(message);
     55 }
     56 
     57 void gpr_default_log(gpr_log_func_args* args) {
     58   const char* final_slash;
     59   const char* display_file;
     60   char* output = NULL;
     61 
     62   final_slash = strrchr(args->file, '/');
     63   if (final_slash == NULL)
     64     display_file = args->file;
     65   else
     66     display_file = final_slash + 1;
     67 
     68   asprintf(&output, "%s:%d] %s", display_file, args->line, args->message);
     69 
     70   __android_log_write(severity_to_log_priority(args->severity), "GRPC", output);
     71 
     72   /* allocated by asprintf => use free, not gpr_free */
     73   free(output);
     74 }
     75 
     76 #endif /* GPR_ANDROID */
     77