service_runtime/linux/nacl_timestamp.c

   1 /*
   2  * Copyright 2008, Google Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met:
   8  *
   9  *     * Redistributions of source code must retain the above copyright
  10  * notice, this list of conditions and the following disclaimer.
  11  *     * Redistributions in binary form must reproduce the above
  12  * copyright notice, this list of conditions and the following disclaimer
  13  * in the documentation and/or other materials provided with the
  14  * distribution.
  15  *     * Neither the name of Google Inc. nor the names of its
  16  * contributors may be used to endorse or promote products derived from
  17  * this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * NaCl Service Runtime logging code.
  34  */
  35
  36 #include <stdio.h>
  37 #include <sys/time.h>
  38 #include <time.h>
  39 #include <stdint.h>
  40
  41 #include "native_client/service_runtime/nacl_timestamp.h"
  42
  43 char  *NaClTimeStampString(char   *buffer,
  44                            size_t buffer_size)
  45 {
  46   struct timeval  tv;
  47   struct tm       bdt;  /* broken down time */
  48
  49   if (-1 == gettimeofday(&tv, (struct timezone *) NULL)) {
  50     snprintf(buffer, buffer_size, "-NA-");
  51     return buffer;
  52   }
  53   (void) localtime_r(&tv.tv_sec, &bdt);
  54   /* suseconds_t holds at most 10**6 < 16**6 = (2**4)**6 = 2**24 < 2**32 */
  55   snprintf(buffer, buffer_size, "%02d:%02d:%02d.%06d",
  56            bdt.tm_hour, bdt.tm_min, bdt.tm_sec, (int32_t) tv.tv_usec);
  57   return buffer;
  58 }