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timer

Simple utility to show the time since or until events

The output shows:

  • Event name (max 26 characters)
  • Start date (optionally including time)
  • End date (optionally including time)
  • Calculated time interval between start and end times. If end time is not given, then the interval between then and the current time is calculated.

Menu options:

  • A - Add a new event
  • Enn - Edit event no. nn
  • Dnn - Delete event no. nn
  • X - Exit, giving you the chance to save the data if it has been changed

Coding notes

Written in C++ on Raspberry Pi OS 11 (Bullseye) and compiled using g++ 10.2.1.

Events are stored using a C++ vector object. The maximum number of events is limited only by OS-allocated memory.

There is no option to scroll or page the list of events.

Data file timer.dat

The data is stored in a file named timer.dat, which is assumed to be in the current working directory. This is a binary file and cannot be edited other than by the timer program. If timer.dat does not exist then it can be created from scratch by adding new events using the timer program.

Note that because Unix timestamps can be 32-bit or 64-bit depending on the architecture of the machine they are hosted on, the timer.dat file will contain 32-bit timestamps if timer is compiled on a 32-bit system, or 64-bit timestamps under a 64-bit compilation. The two versions of timer.dat are not compatible with each other.