Error reporting on File in dart:io

runtime/bin/dartutils.h

 // 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.
 
 #ifndef BIN_DARTUTILS_H_
 #define BIN_DARTUTILS_H_
 
 #include "bin/builtin.h"
+#include "bin/utils.h"
 #include "include/dart_api.h"
 #include "platform/globals.h"
 
 class CommandLineOptions {
  public:
   explicit CommandLineOptions(int max_count)
       : count_(0), max_count_(max_count), arguments_(NULL) {
     static const int kWordSize = sizeof(intptr_t);
     arguments_ = reinterpret_cast<const char **>(malloc(max_count * kWordSize));
     if (arguments_ == NULL) {
@@ skipping 62 matching lines @@
   static Dart_Handle ReadStringFromFile(const char* filename);
   static Dart_Handle LoadSource(CommandLineOptions* url_mapping,
                                 Dart_Handle library,
                                 Dart_Handle url,
                                 Dart_LibraryTag tag,
                                 const char* filename,
                                 Dart_Handle import_map);
   static bool PostNull(Dart_Port port_id);
   static bool PostInt32(Dart_Port port_id, int32_t value);
 
+  // Create a new Dart OSError object with the current OS error.
+  static Dart_Handle NewDartOSError();
+  // Create a new Dart OSError object with the provided OS error.
+  static Dart_Handle NewDartOSError(OSError* os_error);
+
   static const char* kDartScheme;
   static const char* kDartExtensionScheme;
   static const char* kBuiltinLibURL;
   static const char* kCoreLibURL;
   static const char* kCoreImplLibURL;
   static const char* kIOLibURL;
   static const char* kJsonLibURL;
   static const char* kUriLibURL;
   static const char* kUtfLibURL;
   static const char* kIsolateLibURL;
@@ skipping 47 matching lines @@
   static Dart_CObject* NewIntptr(intptr_t value);
   // TODO(sgjesse): Add support for kBigint.
   static Dart_CObject* NewDouble(double value);
   static Dart_CObject* NewString(int length);
   static Dart_CObject* NewString(const char* str);
   static Dart_CObject* NewArray(int length);
   static Dart_CObject* NewByteArray(int length);
 
   Dart_CObject* AsApiCObject() { return cobject_; }
 
+  // Create a new CObject array with an illegal arguments error.
+  static CObject* IllegalArgumentError();
+  // Create a new CObject array with the current OS error.
+  static CObject* NewOSError();
+
  protected:
   CObject() : cobject_(NULL) {}
   Dart_CObject* cobject_;
 
  private:
   static Dart_CObject* New(Dart_CObject::Type type, int additional_bytes = 0);
 
   static Dart_CObject api_null_;
   static Dart_CObject api_true_;
   static Dart_CObject api_false_;
@@ skipping 105 matching lines @@
 
 class CObjectByteArray : public CObject {
  public:
   DECLARE_COBJECT_CONSTRUCTORS(ByteArray)
 
   int Length() const { return cobject_->value.as_byte_array.length; }
   uint8_t* Buffer() const { return cobject_->value.as_byte_array.values; }
 };
 
 #endif  // BIN_DARTUTILS_H_