#!/usr/bin/env bash

#**************************************************************************
#*                                                                        *
#*                                 OCaml                                  *
#*                                                                        *
#*                  Damien Doligez, Jane Street Group, LLC                *
#*                                                                        *
#*   Copyright 2015 Institut National de Recherche en Informatique et     *
#*     en Automatique.                                                    *
#*                                                                        *
#*   All rights reserved.  This file is distributed under the terms of    *
#*   the GNU Lesser General Public License version 2.1, with the          *
#*   special exception on linking described in the file LICENSE.          *
#*                                                                        *
#**************************************************************************

# Use this script on OCAML_INSTR_FILE files

default_curves=major,minor,coll,dispatch

usage () {
    echo 'usage: ocaml-instr-graph file [options]'
    echo '  options:'
    echo "  -d names   plot the data for names (default: $default_curves)"
    echo '  -t title   set the graph title'
    echo '  -m n       clip the values to n (default 1G)'
    echo '  -rt n      set the range for times to 0..n'
    echo '  -rn n      set the range for counts to 0..n'
    echo '  -from t    start at time t'
    echo '  -to t      stop at time t'
    echo '  -help      display this help message and exit'
}

datafile=
curves=,
title=
titleset=false
max=1000000000
ranget=
rangen=
from=0
to=1e19

while [[ $# > 0 ]]; do
    case $1 in
        -d) curves=$curves$2,; shift 2;;
        -t) title=$2; titleset=true; shift 2;;
        -m) max=$2; shift 2;;
        -rt) ranget="set yrange [0:$2]"; shift 2;;
        -rn) rangen="set y2range [0:$2]"; shift 2;;
        -from) from=$2; shift 2;;
        -to) to=$2; shift 2;;
        -help) usage; exit 0;;
        *) datafile=$1; shift 1;;
    esac
done

if [[ "$curves" = , ]]; then
    curves=,$default_curves,
fi

if ! $titleset; then
    title=$datafile
fi

tmpfile=/tmp/ocaml-instr-graph.$$

rm -f $tmpfile-*

awk -v curves="$curves" -v clip=$max -v tmpfile="$tmpfile" -v from=$from \
    -v to=$to '
  function output (filename){
    time = ($2 - starttime) / 1e9;
    if (time < from || time >= to) return;
    if (index(curves, "," filename ",") != 0){
      gsub (/\//,":",filename);
      if (filename ~ /#/){
        point = $3;
      }else{
        point = ($3 - $2) / 1000;
      }
      if (point > clip) point = clip;
      printf ("%.6f %.3f\n", time, point) >> tmpfile "-" filename;
    }
  }
  BEGIN {starttime = 9e18;}
  $1 != "@@" { next; }
  $2 < starttime { starttime = $2 }
  { output($4); }
' $datafile

( echo set title \"$title\"
  echo set key left top
  echo set ytics nomirror
  echo 'set format y "%gus"'
  echo "$ranget"
  echo "$rangen"
  echo set y2tics nomirror
  echo 'set format x "%gs"'
  printf "plot "
  for curve in ${curves//,/ }; do
      f=$tmpfile-${curve//\//:}
      if [ -f $f ]; then
          case $f in
              *#) printf "\"%s\" using 1:2 axes x1y2 title '%s', " "$f" \
                         "$curve"
                  ;;
              *)  printf "\"%s\" using 1:2 title '%s', " "$f" "$curve";;
          esac
      fi
  done
  printf "\n"
) | gnuplot -p

rm -f $tmpfile-*