Add a readline() command to d8. This reads a single line, stripping the...

src/d8.cc

Index: src/d8.cc
===================================================================
--- src/d8.cc	(revision 2625)
+++ src/d8.cc	(working copy)
@@ -164,9 +164,6 @@
 
 
 Handle<Value> Shell::Read(const Arguments& args) {
-  if (args.Length() != 1) {
-    return ThrowException(String::New("Bad parameters"));
-  }
   String::Utf8Value file(args[0]);
   if (*file == NULL) {
     return ThrowException(String::New("Error loading file"));
@@ -179,6 +176,19 @@
 }
 
 
+Handle<Value> Shell::ReadLine(const Arguments& args) {
+  char line_buf[256];
+  if (fgets(line_buf, sizeof(line_buf), stdin) == NULL) {
+    return ThrowException(String::New("Error reading line"));
+  }
+  int len = strlen(line_buf);
+  if (line_buf[len - 1] == '\n') {
+    --len;
+  }
+  return String::New(line_buf, len);
+}
+
+
 Handle<Value> Shell::Load(const Arguments& args) {
   for (int i = 0; i < args.Length(); i++) {
     HandleScope handle_scope;
@@ -400,6 +410,8 @@
   Handle<ObjectTemplate> global_template = ObjectTemplate::New();
   global_template->Set(String::New("print"), FunctionTemplate::New(Print));
   global_template->Set(String::New("read"), FunctionTemplate::New(Read));
+  global_template->Set(String::New("readline"),
+                       FunctionTemplate::New(ReadLine));
   global_template->Set(String::New("load"), FunctionTemplate::New(Load));
   global_template->Set(String::New("quit"), FunctionTemplate::New(Quit));
   global_template->Set(String::New("version"), FunctionTemplate::New(Version));
@@ -590,6 +602,8 @@
                        FunctionTemplate::New(Shell::Print));
   global_template->Set(String::New("read"),
                        FunctionTemplate::New(Shell::Read));
+  global_template->Set(String::New("readline"),
+                       FunctionTemplate::New(Shell::ReadLine));
   global_template->Set(String::New("load"),
                        FunctionTemplate::New(Shell::Load));
   global_template->Set(String::New("yield"),