tree c3597f9f4990aced51e6ce972ec6b923d6f5f472
parent 113ad28c9a94612fe199fe5e85cf007e1abf254c
author Matt Spinler <spinler@us.ibm.com> 1562704791 -0500
committer Matt Spinler <spinler@us.ibm.com> 1564163920 -0500

PEL: Add BCD time helpers for PELs

A PEL stores time in BCD, with a byte each for:
* year MSB
* year LSB
* month
* day
* hour
* minutes
* seconds
* hundredths

This commit adds a structure to represent this, and functions to:
* Create a BCD structure from a std::chrono::time_point
* Convert any number to BCD
* Write the BCD structure into a Stream
* Extract a BCD structure from a Stream

Refresher: The BCD value of 32 is 0x32.

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I09ea4098f3a3981931f595d11fb63aff31d9fb0d