// showDFA performs common actions for individual and merged DFAs
// it returns the ultimate (original or minimized) dfa
func showDFA(dfa *rx.DFA, treelabel string, showtime bool) *rx.DFA {
if *opt['p'] {
dfa.ShowTree(os.Stdout, dfa.Tree, treelabel)
}
if *opt['n'] {
dfa.ShowNFA(os.Stdout, "NFA")
}
if *opt['d'] {
dfa.ShowStates(os.Stdout, "Unoptimized DFA")
}
if !*opt['u'] {
if showtime {
rxsys.Interval() // reset for timing
}
dfa = dfa.Minimize()
if showtime {
timestamp(fmt.Sprintf(
"minimize to %d states", len(dfa.Dstates)))
}
if *opt['d'] {
dfa.ShowStates(os.Stdout, "Minimized DFA")
}
}
if *opt['h'] {
synthx(dfa)
}
return dfa
}
// print NFA and DFA, with buttons linking to display page
func showaut(w http.ResponseWriter, dfa *rx.DFA, exprlist []string) {
fmt.Fprintln(w, `<div><div class=lfloat>`)
nfaBuffer := &bytes.Buffer{}
dfa.ShowNFA(nfaBuffer, "")
fmt.Fprintf(w, "<h2>NFA</h2><PRE class=smaller>\n%s</PRE>\n",
hx(string(nfaBuffer.Bytes())))
formlink(w, "/drawNFA", exprlist, "Draw the graph")
fmt.Fprintln(w, `</div><div class=lstripe>`)
dfaBuffer := &bytes.Buffer{}
dfa.ShowStates(dfaBuffer, "")
fmt.Fprintf(w,
"<h2 class=noadvance>DFA</h2><PRE class=smaller>\n%s</PRE>\n",
hx(string(dfaBuffer.Bytes())))
formlink(w, "/drawDFA", exprlist, "Draw the graph")
fmt.Fprintln(w, `</div></div><div class=reset></div>`)
}