Add a "read" extension to the shell programs. This global function...

samples/shell.cc

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 20 matching lines @@
 #include <stdio.h>
 #include <stdlib.h>
 
 
 void RunShell(v8::Handle<v8::Context> context);
 bool ExecuteString(v8::Handle<v8::String> source,
                    v8::Handle<v8::Value> name,
                    bool print_result,
                    bool report_exceptions);
 v8::Handle<v8::Value> Print(const v8::Arguments& args);
+v8::Handle<v8::Value> Read(const v8::Arguments& args);
 v8::Handle<v8::Value> Load(const v8::Arguments& args);
 v8::Handle<v8::Value> Quit(const v8::Arguments& args);
 v8::Handle<v8::Value> Version(const v8::Arguments& args);
 v8::Handle<v8::String> ReadFile(const char* name);
 void ReportException(v8::TryCatch* handler);
 
 
 int RunMain(int argc, char* argv[]) {
   v8::V8::SetFlagsFromCommandLine(&argc, argv, true);
   v8::HandleScope handle_scope;
   // Create a template for the global object.
   v8::Handle<v8::ObjectTemplate> global = v8::ObjectTemplate::New();
   // Bind the global 'print' function to the C++ Print callback.
   global->Set(v8::String::New("print"), v8::FunctionTemplate::New(Print));
+  // Bind the global 'read' function to the C++ Read callback.
+  global->Set(v8::String::New("read"), v8::FunctionTemplate::New(Read));
   // Bind the global 'load' function to the C++ Load callback.
   global->Set(v8::String::New("load"), v8::FunctionTemplate::New(Load));
   // Bind the 'quit' function
   global->Set(v8::String::New("quit"), v8::FunctionTemplate::New(Quit));
   // Bind the 'version' function
   global->Set(v8::String::New("version"), v8::FunctionTemplate::New(Version));
   // Create a new execution environment containing the built-in
   // functions
   v8::Handle<v8::Context> context = v8::Context::New(NULL, global);
   // Enter the newly created execution environment.
@@ skipping 63 matching lines @@
     v8::String::Utf8Value str(args[i]);
     const char* cstr = ToCString(str);
     printf("%s", cstr);
   }
   printf("\n");
   fflush(stdout);
   return v8::Undefined();
 }
 
 
+// The callback that is invoked by v8 whenever the JavaScript 'read'
+// function is called.  This function loads the content of the file named in
+// the argument into a JavaScript string.
+v8::Handle<v8::Value> Read(const v8::Arguments& args) {
+  if (args.Length() != 1) {
+    return v8::ThrowException(v8::String::New("Bad parameters"));
+  }
+  v8::String::Utf8Value file(args[0]);
+  if (*file == NULL) {
+    return v8::ThrowException(v8::String::New("Error loading file"));
+  }
+  v8::Handle<v8::String> source = ReadFile(*file);
+  if (source.IsEmpty()) {
+    return v8::ThrowException(v8::String::New("Error loading file"));
+  }
+  return source;
+}
+
+
 // The callback that is invoked by v8 whenever the JavaScript 'load'
 // function is called.  Loads, compiles and executes its argument
 // JavaScript file.
 v8::Handle<v8::Value> Load(const v8::Arguments& args) {
   for (int i = 0; i < args.Length(); i++) {
     v8::HandleScope handle_scope;
     v8::String::Utf8Value file(args[i]);
     if (*file == NULL) {
       return v8::ThrowException(v8::String::New("Error loading file"));
     }
@@ skipping 124 matching lines @@
     for (int i = 0; i < start; i++) {
       printf(" ");
     }
     int end = message->GetEndColumn();
     for (int i = start; i < end; i++) {
       printf("^");
     }
     printf("\n");
   }
 }