// Run all the commands on the data in in and if no error happens
// then do the output to out
func do(cmds []parser.Command, in io.Reader, out io.Writer) {
f := gap.NewReader(in)
i, e := interpreter.New(f)
if e != nil {
fmt.Println("error: could not create interpreter:", e)
return
}
e = i.Run(cmds)
if e != nil {
fmt.Println("error while executing commands:", e)
return
}
_, e = i.File().Seek(0, 0)
if e != nil {
fmt.Println("error: could not setupt output:", e)
return
}
_, e = io.Copy(out, i.File())
if e != nil {
fmt.Println("error: could not write all data to output:", e)
return
}
}
// Create a new stream by reading all ontents of the reader
func New(in io.Reader) *Stream {
s := &Stream{}
// Read in to the file
s.file = gap.NewReader(in)
return s
}