#!/usr/local/bin/zsh
#

# match-echotc
# sets the array "reply" with the termcap entries given in $TERMCAP.
#
# This sed script first removes the first termcap entry because it is
# the name of the termcap entry.  Then, in the loop 'start', it makes a
# copy of the pattern space into the hold space, removes the first entry
# from the hold space, leaves just the two-letter entry in the pattern space
# (not its value), prints it if it isn't made up of just spaces and tabs,
# replaces the pattern space with the slightly shortened hold space,
# resets the replacement-checking by a dummy jump, then reads in the
# next line of input if these are no colons left in the pattern space.
# regardless, it jumps back to the 'start' label.  When EOF is reached,
# ends.

local excl=!

reply=( $(echo $TERMCAP | sed -n 's/[^:]*://
:start
h;s/^[^:]*://;x;s/^\([^=#:]*\).*$/\1/;/^[ 	]*$/'$excl'p;g;t reset
:reset
s/:/:/;t start
n;b start') )