func body() (bool, bool, error, int) {
// list targets, list usage, error message
flag.Parse()
if *listTargets {
return true, false, fmt.Errorf(""), 1
}
if *target == "" {
return true, true, fmt.Errorf("Did not specify a target backend"), 2
} else if !parser.IsRegistered(*target) {
return true, true, fmt.Errorf("%s is not a registered target backend!", *target), 3
} else {
var scanner *bufio.Scanner
var o *os.File
if *input == "" {
scanner = bufio.NewScanner(os.Stdin)
} else {
if file, err := os.Open(*input); err != nil {
return false, false, err, 4
} else {
defer file.Close()
scanner = bufio.NewScanner(file)
}
}
if *output == "" {
o = os.Stdout
} else {
if file, err := os.Create(*output); err != nil {
return false, false, err, 5
} else {
defer file.Close()
o = file
}
}
if p, err := parser.New(*target); err != nil {
return false, false, err, 6
} else {
c, e, e2, e3, b := make(chan parser.Entry, 1024), make(chan error), make(chan error), make(chan error), make(chan byte, 512)
// scanner goroutine
go func(scanner *bufio.Scanner, c chan parser.Entry, e chan error) {
for count := 0; scanner.Scan(); count++ {
line := strings.TrimSpace(scanner.Text())
if len(line) == 0 {
continue
} else {
c <- parser.Entry{Line: line, Index: count}
}
}
close(c)
if err := scanner.Err(); err != nil {
e <- err
} else {
e <- nil
}
}(scanner, c, e)
// output goroutine
go func(c chan byte, e chan error, o *os.File) {
q := bufio.NewWriter(o)
if *debug {
var count int
for v := range c {
q.WriteByte(v)
count++
}
fmt.Println("Wrote", count, "bytes")
} else {
for v := range c {
q.WriteByte(v)
}
}
q.Flush()
e <- nil
}(b, e2, o)
// parse process goroutine
go func(c chan parser.Entry, e chan error, o chan byte, p parser.Parser) {
if err := p.Parse(c); err != nil {
e <- err
} else if err := p.Process(); err != nil {
e <- err
} else if err := p.Dump(o); err != nil {
e <- err
} else {
e <- nil
}
close(o)
}(c, e3, b, p)
for i := 0; i < 3; i++ {
select {
case err := <-e:
if err != nil {
return false, false, err, 7
}
case err := <-e2:
if err != nil {
return false, false, err, 8
}
case err := <-e3:
if err != nil {
return false, false, err, 9
}
}
}
}
return false, false, nil, 0
}
}
func generateParser(args ...interface{}) (parser.Parser, error) {
// this is a bit of a hack but just call the iris16 parser from the parser list :D
return parser.New(iris16.RegistrationName(), args)
}