https://bugs.kde.org/show_bug.cgi?id=460684
Bug ID: 460684
Summary: Support timestamps as number system
Classification: Applications
Product: kcalc
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: wishlist
Priority: NOR
Component: general
Assignee: ete...@alum.rit.edu
Reporter: fisc...@unix-ag.uni-kl.de
Target Milestone: ---
In addition to decimal, octal, or binary number systems, kcalc should support
timestamps as number systems.
For example, if the user enters "0:30.5" this should be interpreted as 30
seconds and 500 milliseconds. Adding another number like "0:42" should be
possible, resulting in the output of "1:12.5".
It should be possible to do multiplications and divisions of timestamps with
"regular" numbers. For example, "1:20" divided by 5 should give "0:16".
For internal purposes, user-entered timestamp strings can be converted to a
floating-point number.
For example, the following regular expression can be used to make sense of the
user's input:
(?:(?:(?P<hour>\d+):)?(?P<minute>\d{1,2}):)?(?P<second>\d{1,2})(?P<fraction>[,.]\d+)?
Expressed in Python, the floating-point representation gets computed as
follows:
hour = int(m.group("hour")) if m.group("hour") else 0
minute = int(m.group("minute")) if m.group("minute") else 0
second = int(m.group("second")) if m.group("second") else 0
fraction = float("0" + m.group("fraction").replace(",", ".")) if
m.group("fraction") else 0.0
result = (hour * 60 + minute) * 60 + second + fraction
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