Error reporting on File in dart:io

runtime/bin/dartutils.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "bin/dartutils.h"
 
 #include "bin/file.h"
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/globals.h"
@@ skipping 260 matching lines @@
   int32_t min = 0xc0000000;  // -1073741824
   int32_t max = 0x3fffffff;  // 1073741823
   ASSERT(min <= value && value < max);
   Dart_CObject object;
   object.type = Dart_CObject::kInt32;
   object.value.as_int32 = value;
   return Dart_PostCObject(port_id, &object);
 }
 
 
+Dart_Handle DartUtils::NewDartOSError() {
+  // Extract the current OS error.
+  OSError os_error;
+  return NewDartOSError(&os_error);
+}
+
+
+Dart_Handle DartUtils::NewDartOSError(OSError* os_error) {
+  // Create a Dart OSError object with the information retrieved from the OS.
+  Dart_Handle url = Dart_NewString("dart:io");
+  if (Dart_IsError(url)) return url;
+  Dart_Handle lib = Dart_LookupLibrary(url);
+  if (Dart_IsError(lib)) return lib;
+  Dart_Handle cls = Dart_NewString("IOUtils");
+  if (Dart_IsError(cls)) return cls;
+  Dart_Handle method = Dart_NewString("makeOSError");
+  if (Dart_IsError(method)) return method;
+  Dart_Handle args[2];
+  args[0] = Dart_NewString(os_error->message());
+  if (Dart_IsError(args[0])) return args[0];
+  args[1] = Dart_NewInteger(os_error->code());
+  if (Dart_IsError(args[1])) return args[1];
+  Dart_Handle err = Dart_InvokeStatic(lib, cls, method, 2, args);
+  return err;
+}
+
+
 // Statically allocated Dart_CObject instances for immutable
 // objects. As these will be used by different threads the use of
 // these depends on the fact that the marking internally in the
 // Dart_CObject structure is not marking simple value objects.
 Dart_CObject CObject::api_null_ = { Dart_CObject::kNull , { 0 } };
 Dart_CObject CObject::api_true_ = { Dart_CObject::kBool , { true } };
 Dart_CObject CObject::api_false_ = { Dart_CObject::kBool, { false } };
 CObject CObject::null_ = CObject(&api_null_);
 CObject CObject::true_ = CObject(&api_true_);
 CObject CObject::false_ = CObject(&api_false_);
@@ skipping 80 matching lines @@
   return cobject;
 }
 
 
 Dart_CObject* CObject::NewByteArray(int length) {
   Dart_CObject* cobject = New(Dart_CObject::kByteArray, length);
   cobject->value.as_byte_array.length = length;
   cobject->value.as_byte_array.values = reinterpret_cast<uint8_t*>(cobject + 1);
   return cobject;
 }
+
+
+static int kIllegalArgumentError = 1;
+static int kOSError = 2;
+
+
+CObject* CObject::IllegalArgumentError() {
+  CObjectArray* result = new CObjectArray(CObject::NewArray(1));
+  result->SetAt(0, new CObjectInt32(CObject::NewInt32(kIllegalArgumentError)));
+  return result;
+}
+
+
+CObject* CObject::NewOSError() {
+  OSError os_error;
+  CObject* error_message =
+      new CObjectString(CObject::NewString(os_error.message()));
+  CObjectArray* result = new CObjectArray(CObject::NewArray(3));
+  result->SetAt(0, new CObjectInt32(CObject::NewInt32(kOSError)));
+  result->SetAt(1, new CObjectInt32(CObject::NewInt32(os_error.code())));
+  result->SetAt(2, error_message);
+  return result;
+}