michael@0: #!/bin/sh
michael@0: #
michael@0: # This Source Code Form is subject to the terms of the Mozilla Public
michael@0: # License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0: # file, You can obtain one at http://mozilla.org/MPL/2.0/.
michael@0: 
michael@0: #   histogram-pretty.sh [-c <count>] [-w <width>] <file>
michael@0: #
michael@0: # Pretty-print the histogram in file <file>, displaying at most
michael@0: # <count> rows.
michael@0: 
michael@0: # How many rows are we gonna show?
michael@0: COUNT=20
michael@0: WIDTH=22
michael@0: 
michael@0: # Read arguments
michael@0: while [ $# -gt 0 ]; do
michael@0:     case "$1" in
michael@0:     -c) COUNT=$2
michael@0:         shift 2
michael@0:         ;;
michael@0:     -w) WIDTH=$2
michael@0:         shift 2
michael@0:         ;;
michael@0:     *)  break
michael@0:         ;;
michael@0:     esac
michael@0: done
michael@0: 
michael@0: FILE=$1
michael@0: 
michael@0: # The first `awk' script computes a `TOTAL' row. Then, we sort by the
michael@0: # larges delta in bytes.
michael@0: awk '{ tobj += $2; tbytes += $3; } END { print "TOTAL", tobj, tbytes; }' ${FILE} > /tmp/$$.sorted
michael@0: 
michael@0: sort -nr +2 ${FILE} >> /tmp/$$.sorted
michael@0: 
michael@0: # Pretty-print, including percentages
michael@0: cat <<EOF > /tmp/$$.awk
michael@0: BEGIN {
michael@0:   printf "%-${WIDTH}s  Count    Bytes %Total   %Cov\n", "Type";
michael@0:   }
michael@0: \$1 == "TOTAL" {
michael@0:   tbytes = \$3;
michael@0:   }
michael@0: NR <= $COUNT {
michael@0:   if (\$1 != "TOTAL") {
michael@0:     covered += \$3;
michael@0:   }
michael@0:   printf "%-${WIDTH}s %6d %8d %6.2lf %6.2lf\n", \$1, \$2, \$3, 100.0 * \$3 / tbytes, 100.0 * covered / tbytes;
michael@0:   }
michael@0: NR > $COUNT {
michael@0:   oobjs += \$2;  obytes += \$3; covered += \$3;
michael@0:   }
michael@0: END {
michael@0:   printf "%-${WIDTH}s %6d %8d %6.2lf %6.2lf\n", "OTHER", oobjs, obytes, obytes * 100.0 / tbytes, covered * 100.0 / tbytes;
michael@0:   }
michael@0: EOF
michael@0: 
michael@0: # Now pretty print the file, and spit it out on stdout.
michael@0: awk -f /tmp/$$.awk /tmp/$$.sorted
michael@0: 
michael@0: rm -f /tmp/$$.awk /tmp/$$.sorted