5 files changed, 368 insertions, 0 deletions
diff --git a/cmd/ethereum/repl/console_colors_windows.go b/cmd/ethereum/repl/console_colors_windows.go
new file mode 100644
index 000000000..1f517bd8c
--- /dev/null
+++ b/cmd/ethereum/repl/console_colors_windows.go
@@ -0,0 +1,80 @@
+/* Inspired by https://github.com/xuyu/logging/blob/master/colorful_win.go */
+
+package ethrepl
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+type color uint16
+
+const (
+	green  = color(0x0002)
+	red    = color(0x0004)
+	yellow = color(0x000E)
+)
+
+const (
+	mask = uint16(yellow | green | red)
+)
+
+var (
+	kernel32                       = syscall.NewLazyDLL("kernel32.dll")
+	procGetStdHandle               = kernel32.NewProc("GetStdHandle")
+	procSetConsoleTextAttribute    = kernel32.NewProc("SetConsoleTextAttribute")
+	procGetConsoleScreenBufferInfo = kernel32.NewProc("GetConsoleScreenBufferInfo")
+	hStdout                        uintptr
+	initScreenInfo                 *consoleScreenBufferInfo
+)
+
+func setConsoleTextAttribute(hConsoleOutput uintptr, wAttributes uint16) bool {
+	ret, _, _ := procSetConsoleTextAttribute.Call(hConsoleOutput, uintptr(wAttributes))
+	return ret != 0
+}
+
+type coord struct {
+	X, Y int16
+}
+
+type smallRect struct {
+	Left, Top, Right, Bottom int16
+}
+
+type consoleScreenBufferInfo struct {
+	DwSize              coord
+	DwCursorPosition    coord
+	WAttributes         uint16
+	SrWindow            smallRect
+	DwMaximumWindowSize coord
+}
+
+func getConsoleScreenBufferInfo(hConsoleOutput uintptr) *consoleScreenBufferInfo {
+	var csbi consoleScreenBufferInfo
+	ret, _, _ := procGetConsoleScreenBufferInfo.Call(hConsoleOutput, uintptr(unsafe.Pointer(&csbi)))
+	if ret == 0 {
+		return nil
+	}
+	return &csbi
+}
+
+const (
+	stdOutputHandle = uint32(-11 & 0xFFFFFFFF)
+)
+
+func init() {
+	hStdout, _, _ = procGetStdHandle.Call(uintptr(stdOutputHandle))
+	initScreenInfo = getConsoleScreenBufferInfo(hStdout)
+}
+
+func resetColorful() {
+	if initScreenInfo == nil {
+		return
+	}
+	setConsoleTextAttribute(hStdout, initScreenInfo.WAttributes)
+}
+
+func changeColor(c color) {
+	attr := uint16(0) & ^mask | uint16(c)
+	setConsoleTextAttribute(hStdout, attr)
+}
diff --git a/cmd/ethereum/repl/repl.go b/cmd/ethereum/repl/repl.go
new file mode 100644
index 000000000..a40a8874e
--- /dev/null
+++ b/cmd/ethereum/repl/repl.go
@@ -0,0 +1,85 @@
+package ethrepl
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"os"
+	"path"
+
+	"github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/ethlog"
+	"github.com/ethereum/go-ethereum/ethutil"
+	"github.com/ethereum/go-ethereum/javascript"
+)
+
+var logger = ethlog.NewLogger("REPL")
+
+type Repl interface {
+	Start()
+	Stop()
+}
+
+type JSRepl struct {
+	re *javascript.JSRE
+
+	prompt string
+
+	history *os.File
+
+	running bool
+}
+
+func NewJSRepl(ethereum *eth.Ethereum) *JSRepl {
+	hist, err := os.OpenFile(path.Join(ethutil.Config.ExecPath, "history"), os.O_RDWR|os.O_CREATE, os.ModePerm)
+	if err != nil {
+		panic(err)
+	}
+
+	return &JSRepl{re: javascript.NewJSRE(ethereum), prompt: "> ", history: hist}
+}
+
+func (self *JSRepl) Start() {
+	if !self.running {
+		self.running = true
+		logger.Infoln("init JS Console")
+		reader := bufio.NewReader(self.history)
+		for {
+			line, err := reader.ReadString('\n')
+			if err != nil && err == io.EOF {
+				break
+			} else if err != nil {
+				fmt.Println("error reading history", err)
+				break
+			}
+
+			addHistory(line[:len(line)-1])
+		}
+		self.read()
+	}
+}
+
+func (self *JSRepl) Stop() {
+	if self.running {
+		self.running = false
+		self.re.Stop()
+		logger.Infoln("exit JS Console")
+		self.history.Close()
+	}
+}
+
+func (self *JSRepl) parseInput(code string) {
+	defer func() {
+		if r := recover(); r != nil {
+			fmt.Println("[native] error", r)
+		}
+	}()
+
+	value, err := self.re.Run(code)
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	self.PrintValue(value)
+}
diff --git a/cmd/ethereum/repl/repl_darwin.go b/cmd/ethereum/repl/repl_darwin.go
new file mode 100644
index 000000000..ba7dae996
--- /dev/null
+++ b/cmd/ethereum/repl/repl_darwin.go
@@ -0,0 +1,127 @@
+package ethrepl
+
+// #cgo darwin CFLAGS: -I/usr/local/opt/readline/include
+// #cgo darwin LDFLAGS: -L/usr/local/opt/readline/lib
+// #cgo LDFLAGS: -lreadline
+// #include <stdio.h>
+// #include <stdlib.h>
+// #include <readline/readline.h>
+// #include <readline/history.h>
+import "C"
+import (
+	"fmt"
+	"os"
+	"os/signal"
+	"strings"
+	"syscall"
+	"unsafe"
+)
+
+func initReadLine() {
+	C.rl_catch_sigwinch = 0
+	C.rl_catch_signals = 0
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, syscall.SIGWINCH)
+	signal.Notify(c, os.Interrupt)
+	go func() {
+		for sig := range c {
+			switch sig {
+			case syscall.SIGWINCH:
+				C.rl_resize_terminal()
+
+			case os.Interrupt:
+				C.rl_cleanup_after_signal()
+			default:
+
+			}
+		}
+	}()
+}
+
+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() {
+	initReadLine()
+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
+				}
+
+				hist := str[:len(str)-1]
+				addHistory(hist) //allow user to recall this line
+				self.history.WriteString(str)
+
+				self.parseInput(str)
+
+				str = ""
+			}
+		}
+	}
+}
+
+func (self *JSRepl) PrintValue(v interface{}) {
+	method, _ := self.re.Vm.Get("prettyPrint")
+	v, err := self.re.Vm.ToValue(v)
+	if err == nil {
+		val, err := method.Call(method, v)
+		if err == nil {
+			fmt.Printf("%v", val)
+		}
+	}
+}
diff --git a/cmd/ethereum/repl/repl_linux.go b/cmd/ethereum/repl/repl_linux.go
new file mode 120000
index 000000000..276f135d7
--- /dev/null
+++ b/cmd/ethereum/repl/repl_linux.go
@@ -0,0 +1 @@
+repl_darwin.go
+\ No newline at end of file
diff --git a/cmd/ethereum/repl/repl_windows.go b/cmd/ethereum/repl/repl_windows.go
new file mode 100644
index 000000000..bfae57088
--- /dev/null
+++ b/cmd/ethereum/repl/repl_windows.go
@@ -0,0 +1,75 @@
+package ethrepl
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+)
+
+func (self *JSRepl) read() {
+	reader := bufio.NewReader(os.Stdin)
+	for {
+		fmt.Printf(self.prompt)
+		str, _, err := reader.ReadLine()
+		if err != nil {
+			fmt.Println("Error reading input", err)
+		} else {
+			if (string(str) == "exit") {
+				self.Stop()
+				break
+			} else {
+				self.parseInput(string(str))
+			}
+		}
+	}
+}
+
+func addHistory(s string) {
+}
+
+func printColored(outputVal string) {
+	for ; outputVal != "" ; {
+		codePart := ""
+		if (strings.HasPrefix(outputVal, "\033[32m")) {
+			codePart = "\033[32m"
+			changeColor(2)
+		}
+		if (strings.HasPrefix(outputVal, "\033[1m\033[30m")) {
+			codePart = "\033[1m\033[30m"
+			changeColor(8)
+		}
+		if (strings.HasPrefix(outputVal, "\033[31m")) {
+			codePart = "\033[31m"
+			changeColor(red)
+		}
+		if (strings.HasPrefix(outputVal, "\033[35m")) {
+			codePart = "\033[35m"
+			changeColor(5)
+		}
+		if (strings.HasPrefix(outputVal, "\033[0m")) {
+			codePart = "\033[0m"
+			resetColorful()
+		}
+		textPart := outputVal[len(codePart):len(outputVal)]
+		index := strings.Index(textPart, "\033")
+		if index == -1 {
+			outputVal = ""
+		} else {
+			outputVal = textPart[index:len(textPart)]
+			textPart = textPart[0:index]
+		}
+		fmt.Printf("%v", textPart)
+	}
+}
+
+func (self *JSRepl) PrintValue(v interface{}) {
+	method, _ := self.re.Vm.Get("prettyPrint")
+	v, err := self.re.Vm.ToValue(v)
+	if err == nil {
+		val, err := method.Call(method, v)
+		if err == nil {
+			printColored(fmt.Sprintf("%v", val))
+		}
+	}
+}