timestamp.cc

// -*- C++ -*-
//
// Timestamp class implementation.
//
// Copyright 1992-2021 Deven T. Corzine <deven@ties.org>
//
// SPDX-License-Identifier: MIT
//

#include "phoenix.h"

const char *Timestamp::date(int start, int len) // Get part of date string.
{
   static char buf[MaxFormattedLength + 1];

   strncpy(buf, ctime(&time), MaxFormattedLength); // Copy date string.
   buf[MaxFormattedLength] = 0; // Ditch the newline.
   if (len > 0 && len < MaxFormattedLength) {
      buf[start + len] = 0;     // Truncate further if requested.
   }
   return buf + start;          // Return (sub)string.
}

const char *Timestamp::stamp()        // Return short timestamp string.
{
   static char buf[MaxFormattedLength + 1];
   String buffer;
   Timestamp now;

   // Check for different year or future timestamp.
   buffer = now.date(20, 4);
   if (time > now || buffer != date(20, 4)) {
      // Different year or future timestamp, return "Mmm dd yyyy hh:mm" format.
      buffer = date(4, 7);
      buffer.append(date(20, 4));
      buffer.append(date(10, 6));
      strcpy(buf, ~buffer);
      return buf;
   }

   // Check for different week.
   Timestamp lastweek = now - 604800;
   buffer             = lastweek.date(4, 6);
   if (time < lastweek && buffer != date(4, 6)) {
      // Same year, not in past week, return "Mmm dd hh:mm" format.
      return date(4, 12);
   }

   // Check for different day.
   buffer = now.date(4, 6);
   if (buffer != date(4, 6)) {
      // Different day, within past week, return "Ddd hh:mm" format.
      buffer = date(0, 4);
      buffer.append(date(11, 5));
      strcpy(buf, ~buffer);
      return buf;
   }

   // Same day, return "hh:mm" format.
   return date(11, 5);
}