func main() {
// command-line flags
flag.Var(&requestedRate, "rate", "Clock rate to run the machine at")
// update usage
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "usage: %s [flags] program\n", os.Args[0])
flag.PrintDefaults()
}
flag.Parse()
if flag.NArg() != 1 {
flag.Usage()
os.Exit(2)
}
program := flag.Arg(0)
data, err := ioutil.ReadFile(program)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
// Interpret the file as Words
words := make([]core.Word, len(data)/2)
for i := 0; i < len(data)/2; i++ {
w := core.Word(data[i*2])<<8 + core.Word(data[i*2+1])
words[i] = w
}
// Set up a machine
machine := new(dcpu.Machine)
if err := machine.State.LoadProgram(words, 0); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
if err := machine.Start(requestedRate); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
var effectiveRate dcpu.ClockRate
// now wait for the q key
for {
evt := termbox.PollEvent()
if err := machine.HasError(); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
if evt.Type == termbox.EventKey {
if evt.Key == termbox.KeyCtrlC || (evt.Mod == 0 && evt.Ch == 'q') {
effectiveRate = machine.EffectiveClockRate()
if err := machine.Stop(); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
break
}
}
}
if *printRate {
fmt.Printf("Effective clock rate: %s\n", effectiveRate)
}
}
