Fix native extension lookup

runtime/bin/utils_win.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 "platform/globals.h"
 #if defined(TARGET_OS_WINDOWS)
 
 #include <errno.h>  // NOLINT
 #include <time.h>  // NOLINT
 
@@ skipping 141 matching lines @@
 }
 
 
 const wchar_t* StringUtilsWin::Utf8ToWide(
     const char* utf8, intptr_t len, intptr_t* result_len) {
   return const_cast<const wchar_t*>(
       StringUtilsWin::Utf8ToWide(const_cast<char*>(utf8), len, result_len));
 }
 
 
+char* StringUtils::StrNDup(const char* s, intptr_t n) {
+  intptr_t len = strlen(s);
+  if ((n < 0) || (len < 0)) {
+    return NULL;
+  }
+  if (n < len) {
+    len = n;
+  }
+  char* result = reinterpret_cast<char*>(malloc(len + 1));
+  if (result == NULL) {
+    return NULL;
+  }
+  result[len] = '\0';
+  return reinterpret_cast<char*>(memmove(result, s, len));
+}
+
+
 bool ShellUtils::GetUtf8Argv(int argc, char** argv) {
   wchar_t* command_line = GetCommandLineW();
   int unicode_argc;
   wchar_t** unicode_argv = CommandLineToArgvW(command_line, &unicode_argc);
   if (unicode_argv == NULL) {
     return false;
   }
   // The argc passed to main should have the same argc as we get here.
   ASSERT(argc == unicode_argc);
   if (argc < unicode_argc) {
@@ skipping 70 matching lines @@
 
 
 void TimerUtils::Sleep(int64_t millis) {
   ::Sleep(millis);
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)