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main.go
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main.go
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package main
import (
"flag"
"os"
)
var (
cmdfile = flag.String("cmdfile", "default.txt", "command file")
dotfile = flag.String("dotfile", "G.dot", "Field representation will be written here")
)
func init() {
flag.Parse()
}
func main() {
o := StdOutput{}
f := NewField()
f.Add(NewMixer())
f.Add(NewClock(f))
p := NewFieldParser(f, o)
if fi, err := NewFileInput(*cmdfile); err == nil {
D("reading %s", *cmdfile)
REPL(fi, p)
D("done reading %s", *cmdfile)
} else {
D("%s not read: %s", *cmdfile, err)
}
ii := &InteractiveInput{}
REPL(ii, p)
}
func REPL(r Input, e Parser) {
for {
input, err := r.ReadOne() // R
if err != nil {
return
}
e.Parse(input) // E+P
} // L
}
func writeDotfile(f Field) {
if *dotfile == "" {
return
}
file, err := os.Create(*dotfile)
if err != nil {
D("couldn't write %s: %s", *dotfile, err)
return
}
defer file.Close()
_, err = file.Write([]byte(f.Dot()))
if err != nil {
D("error writing %s: %s", *dotfile, err)
return
}
}