Add support for working with large files, in dart:io.

runtime/bin/file.cc

 // Copyright (c) 2013, 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/file.h"
 
 #include "bin/builtin.h"
 #include "bin/dartutils.h"
 #include "bin/io_buffer.h"
 #include "bin/thread.h"
@@ skipping 316 matching lines @@
     Dart_Handle err = DartUtils::NewDartOSError(&os_error);
     if (Dart_IsError(err)) Dart_PropagateError(err);
     Dart_SetReturnValue(args, err);
   }
 }
 
 
 void FUNCTION_NAME(File_Length)(Dart_NativeArguments args) {
   File* file = GetFilePointer(Dart_GetNativeArgument(args, 0));
   ASSERT(file != NULL);
-  intptr_t return_value = file->Length();
+  off64_t return_value = file->Length();
   if (return_value >= 0) {
     Dart_SetReturnValue(args, Dart_NewInteger(return_value));
   } else {
     Dart_Handle err = DartUtils::NewDartOSError();
     if (Dart_IsError(err)) Dart_PropagateError(err);
     Dart_SetReturnValue(args, err);
   }
 }
 
 
 void FUNCTION_NAME(File_LengthFromPath)(Dart_NativeArguments args) {
   const char* path =
       DartUtils::GetStringValue(Dart_GetNativeArgument(args, 0));
-  intptr_t return_value = File::LengthFromPath(path);
+  off64_t return_value = File::LengthFromPath(path);
   if (return_value >= 0) {
     Dart_SetReturnValue(args, Dart_NewInteger(return_value));
   } else {
     Dart_Handle err = DartUtils::NewDartOSError();
     if (Dart_IsError(err)) Dart_PropagateError(err);
     Dart_SetReturnValue(args, err);
   }
 }
 
 
@@ skipping 391 matching lines @@
 }
 
 
 CObject* File::SetPositionRequest(const CObjectArray& request) {
   if (request.Length() == 2 &&
       request[0]->IsIntptr() &&
       request[1]->IsInt32OrInt64()) {
     File* file = CObjectToFilePointer(request[0]);
     ASSERT(file != NULL);
     if (!file->IsClosed()) {
-      int64_t position = CObjectInt32OrInt64ToInt64(request[1]);
+      off64_t position = CObjectInt32OrInt64ToInt64(request[1]);
       if (file->SetPosition(position)) {
         return CObject::True();
       } else {
         return CObject::NewOSError();
       }
     } else {
       return CObject::FileClosedError();
     }
   }
   return CObject::IllegalArgumentError();
@@ skipping 19 matching lines @@
   }
   return CObject::IllegalArgumentError();
 }
 
 
 CObject* File::LengthRequest(const CObjectArray& request) {
   if (request.Length() == 1 && request[0]->IsIntptr()) {
     File* file = CObjectToFilePointer(request[0]);
     ASSERT(file != NULL);
     if (!file->IsClosed()) {
-      off_t return_value = file->Length();
+      off64_t return_value = file->Length();
       if (return_value >= 0) {
         return new CObjectInt64(CObject::NewInt64(return_value));
       } else {
         return CObject::NewOSError();
       }
     } else {
       return CObject::FileClosedError();
     }
   }
   return CObject::IllegalArgumentError();
 }
 
 
 CObject* File::LengthFromPathRequest(const CObjectArray& request) {
   if (request.Length() == 1 && request[0]->IsString()) {
     CObjectString filepath(request[0]);
-    off_t return_value = File::LengthFromPath(filepath.CString());
+    off64_t return_value = File::LengthFromPath(filepath.CString());
     if (return_value >= 0) {
       return new CObjectInt64(CObject::NewInt64(return_value));
     } else {
       return CObject::NewOSError();
     }
   }
   return CObject::IllegalArgumentError();
 }
 
 
@@ skipping 325 matching lines @@
     CObjectArray* wrapper = new CObjectArray(CObject::NewArray(2));
     wrapper->SetAt(0, new CObjectInt32(CObject::NewInt32(CObject::kSuccess)));
     wrapper->SetAt(1, result);
     return wrapper;
   }
   return CObject::IllegalArgumentError();
 }
 
 }  // namespace bin
 }  // namespace dart