#!/bin/sh
#
# usage: mxref-tags infile1 infile2 ... >outfile
#
# create index lines for all tokens in the given files,
# using GNU ctags -x to call out defining instances
#
# When displaying in vxref, the defining instances will have
# the filename indented, which means they will sort to the top
# of the list of instances of the name.

(
    ctags -x ${1+"$@"} | nawk '{printf( "%s  %s %4d\n", $1, $3, $2)}'
    nawk '{
        sub("$"," ")
        gsub("[^a-zA-Z0-9_]+"," ")
        sub("^ ","")
        gsub(" "," " FILENAME " " sprintf("%4d",FNR) "\n")
        printf "%s",$0
    }' ${1+"$@"}
) | egrep '.....* .* ' | sort -T .