package main // #cgo LDFLAGS: -lreadline // #include // #include // #include // #include import "C" import ( "github.com/obscuren/otto" "strings" "unsafe" ) func readLine(prompt *string) *string { var p *C.char //readline allows an empty prompt(NULL) if prompt != nil { p = C.CString(*prompt) } ret := C.readline(p) if p != nil { C.free(unsafe.Pointer(p)) } if ret == nil { return nil } //EOF s := C.GoString(ret) C.free(unsafe.Pointer(ret)) return &s } func addHistory(s string) { p := C.CString(s) C.add_history(p) C.free(unsafe.Pointer(p)) } var indentCount = 0 var str = "" func (self *JSRepl) setIndent() { open := strings.Count(str, "{") open += strings.Count(str, "(") closed := strings.Count(str, "}") closed += strings.Count(str, ")") indentCount = open - closed if indentCount <= 0 { self.prompt = "> " } else { self.prompt = strings.Join(make([]string, indentCount*2), "..") self.prompt += " " } } func (self *JSRepl) read() { L: for { switch result := readLine(&self.prompt); true { case result == nil: break L case *result != "": str += *result + "\n" self.setIndent() if indentCount <= 0 { if *result == "exit" { self.Stop() break L } addHistory(str) //allow user to recall this line self.parseInput(str) str = "" } } } } func (self *JSRepl) PrintValue(value otto.Value) { method, _ := self.re.vm.Get("prettyPrint") method.Call(method, value) }