// setup performs global initialization actions
func setup() {
rxsys.Interval() // initialize timestamps
options() // process command-line options
if verbose {
showopts() // show command options
}
// handle -P (profiling) option
pfname := *val['P'] // profiling filename
if pfname != "" { // if set
pfile, err := os.Create(pfname)
rx.CkErr(err)
pprof.StartCPUProfile(pfile)
}
// set up input scanning
if *val['e'] != "" { // if -e specified
if len(flag.Args()) > 0 {
log.Fatal("-e option precludes reading " + flag.Arg(0))
}
input = bufio.NewScanner(bytes.NewReader([]byte(*val['e'])))
} else {
input = rx.MkScanner(rx.OneInputFile())
}
timestamp("init")
}
func main() {
rflag := flag.Bool("R", false, "reproducible output")
flag.Parse()
if *rflag {
rand.Seed(0)
} else {
rand.Seed(int64(time.Now().Nanosecond()))
}
// load and process regexps
exprs := make([]*RegEx, 0)
tlist := make([]rx.Node, 0)
rx.LoadExpressions(rx.OneInputFile(), func(l *rx.RegExParsed) {
if l.Err != nil {
fmt.Fprintln(os.Stderr, l.Err)
}
if l.Tree != nil {
atree := rx.Augment(l.Tree, len(tlist))
tlist = append(tlist, atree)
exprs = append(exprs, &RegEx{len(exprs), l.Expr})
}
})
// echo the input with index numbers
fmt.Print(`{"Expressions":`)
rx.Jlist(os.Stdout, exprs)
fmt.Println(",")
// build the DFA and produce examples
synthx := rx.MultiDFA(tlist).Synthesize()
// convert into expected form with int array replacing BitSet
results := make([]*Example, 0, len(synthx))
for _, x := range synthx {
results = append(results,
&Example{x.State, x.RXset.Members(), x.Example})
}
// output the array of synthesized examples
fmt.Print(`"Examples":`)
rx.Jlist(os.Stdout, results)
fmt.Println("}")
}