bug#11875: EMACS_TIME simplification

[Paul Eggert]

Tags: patch

Attached is a patch to the Emacs trunk bzr 108944 that simplifies
EMACS_TIME calculation.  It replaces macros (which typically
do not work with GDB) with functions, typedefs, and enums, making
time-related code easier to debug.  The functional style also
makes the source code easier to read and maintain.  I would
have appreciated having this in my recent round of changes
to the time code.

I plan to install this after a bit more testing but thought I'd
post it for review first.

timefun.txt
Description: Text document