1  /*
       2   * Print time_t and nanoseconds in symbolic format.
       3   *
       4   * Copyright (c) 2015-2017 Dmitry V. Levin <ldv@strace.io>
       5   * Copyright (c) 2017-2021 The strace developers.
       6   * All rights reserved.
       7   *
       8   * SPDX-License-Identifier: GPL-2.0-or-later
       9   */
      10  
      11  #include "tests.h"
      12  #include <stdio.h>
      13  #include <time.h>
      14  
      15  static void
      16  print_time_t_ex(const time_t t, const unsigned long long part_sec,
      17  		const unsigned int max_part_sec, const int width,
      18  		const int comment)
      19  {
      20  
      21  	if ((!t && !part_sec) || part_sec > max_part_sec)
      22  		return;
      23  
      24  	const struct tm *const p = localtime(&t);
      25  	char buf[256];
      26  	if (!p || !strftime(buf, sizeof(buf), "%FT%T", p))
      27  		return;
      28  
      29  	if (comment)
      30  		fputs(" /* ", stdout);
      31  
      32  	fputs(buf, stdout);
      33  
      34  	if (part_sec)
      35  		printf(".%0*llu", width, part_sec);
      36  
      37  	if (strftime(buf, sizeof(buf), "%z", p))
      38  		fputs(buf, stdout);
      39  
      40  	if (comment)
      41  		fputs(" */", stdout);
      42  }
      43  
      44  void
      45  print_time_t_nsec(const time_t t, const unsigned long long nsec, int comment)
      46  {
      47  	print_time_t_ex(t, nsec, 999999999, 9, comment);
      48  }
      49  
      50  void
      51  print_time_t_usec(const time_t t, const unsigned long long usec, int comment)
      52  {
      53  	print_time_t_ex(t, usec, 999999, 6, comment);
      54  }