Make the Dart standalone VM run on Windows XP

runtime/bin/socket_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 "bin/builtin.h"
 #include "bin/eventhandler.h"
 #include "bin/socket.h"
 
 bool Socket::Initialize() {
   int err;
@@ skipping 173 matching lines @@
   if (status != 0) {
     ASSERT(*os_error == NULL);
     *os_error = new OSError(status,
                             gai_strerror(status),
                             OSError::kGetAddressInfo);
     return NULL;
   }
   // Convert the address into IPv4 dotted decimal notation.
   char* buffer = reinterpret_cast<char*>(malloc(INET_ADDRSTRLEN));
   sockaddr_in *sockaddr = reinterpret_cast<sockaddr_in *>(info->ai_addr);
-  const char* result = inet_ntop(AF_INET,
-                                 reinterpret_cast<void *>(&sockaddr->sin_addr),
-                                 buffer,
-                                 INET_ADDRSTRLEN);
-  if (result == NULL) {
+
+  // Clear the port before calling WSAAddressToString as WSAAddressToString
+  // includes the port in the formatted string.
+  DWORD len = INET_ADDRSTRLEN;
+  int err = WSAAddressToString(reinterpret_cast<LPSOCKADDR>(sockaddr),
+                               sizeof(sockaddr_in),
+                               NULL,
+                               buffer,
+                               &len);
+  if (err != 0) {
     free(buffer);
     return NULL;
   }
-  ASSERT(result == buffer);
   return buffer;
 }
 
 
 intptr_t ServerSocket::CreateBindListen(const char* host,
                                         intptr_t port,
                                         intptr_t backlog) {
   SOCKET s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
   if (s == INVALID_SOCKET) {
     return -1;
@@ skipping 31 matching lines @@
   if (status == SOCKET_ERROR) {
     DWORD rc = WSAGetLastError();
     closesocket(s);
     SetLastError(rc);
     return -1;
   }
 
   ListenSocket* listen_socket = new ListenSocket(s);
   return reinterpret_cast<intptr_t>(listen_socket);
 }