ws2_32/tests: Load GetHostNameW() dynamically.

dlls/ws2_32/tests/sock.c

@@ -71,6 +71,7 @@ static int   (WINAPI *pGetAddrInfoExW)(const WCHAR *name, const WCHAR *servname,
         struct timeval *timeout, OVERLAPPED *overlapped,
         LPLOOKUPSERVICE_COMPLETION_ROUTINE completion_routine, HANDLE *handle);
 static int   (WINAPI *pGetAddrInfoExOverlappedResult)(OVERLAPPED *overlapped);
+static int   (WINAPI *pGetHostNameW)(WCHAR *, int);
 static PCSTR (WINAPI *pInetNtop)(INT,LPVOID,LPSTR,ULONG);
 static PCWSTR(WINAPI *pInetNtopW)(INT,LPVOID,LPWSTR,ULONG);
 static int   (WINAPI *pInetPtonA)(INT,LPCSTR,LPVOID);
@@ -1203,6 +1204,7 @@ static void Init (void)
     pFreeAddrInfoExW = (void *)GetProcAddress(hws2_32, "FreeAddrInfoExW");
     pGetAddrInfoExW = (void *)GetProcAddress(hws2_32, "GetAddrInfoExW");
     pGetAddrInfoExOverlappedResult = (void *)GetProcAddress(hws2_32, "GetAddrInfoExOverlappedResult");
+    pGetHostNameW = (void *)GetProcAddress(hws2_32, "GetHostNameW");
     pInetNtop = (void *)GetProcAddress(hws2_32, "inet_ntop");
     pInetNtopW = (void *)GetProcAddress(hws2_32, "InetNtopW");
     pInetPtonA = (void *)GetProcAddress(hws2_32, "inet_pton");
@@ -4328,26 +4330,31 @@ static void test_GetHostNameW(void)
     WCHAR name[256];
     int ret, len;
 
+    if (!pGetHostNameW)
+    {
+        win_skip("GetHostNameW() not present\n");
+        return;
+    }
     WSASetLastError(0xdeadbeef);
-    ret = GetHostNameW(NULL, 256);
+    ret = pGetHostNameW(NULL, 256);
     ok(ret == -1, "GetHostNameW() returned %d\n", ret);
     ok(WSAGetLastError() == WSAEFAULT, "GetHostNameW with null buffer "
             "failed with %d, expected %d\n", WSAGetLastError(), WSAEFAULT);
 
-    ret = GetHostNameW(name, sizeof(name));
+    ret = pGetHostNameW(name, sizeof(name));
     ok(ret == 0, "GetHostNameW() call failed: %d\n", WSAGetLastError());
 
     len = wcslen(name);
     WSASetLastError(0xdeadbeef);
     wcscpy(name, L"deadbeef");
-    ret = GetHostNameW(name, len);
+    ret = pGetHostNameW(name, len);
     ok(ret == -1, "GetHostNameW() returned %d\n", ret);
     ok(!wcscmp(name, L"deadbeef"), "name changed unexpected!\n");
     ok(WSAGetLastError() == WSAEFAULT, "GetHostNameW with insufficient length "
             "failed with %d, expected %d\n", WSAGetLastError(), WSAEFAULT);
 
     len++;
-    ret = GetHostNameW(name, len);
+    ret = pGetHostNameW(name, len);
     ok(ret == 0, "GetHostNameW() call failed: %d\n", WSAGetLastError());
 }