kernel32: Add special case for "." and ".." to GetLongPathName.

dlls/kernel32/path.c

@@ -358,6 +358,17 @@ DWORD WINAPI GetLongPathNameW( LPCWSTR shortpath, LPWSTR longpath, DWORD longlen
         for (; *p && *p != '/' && *p != '\\'; p++);
         tmplen = p - (shortpath + sp);
         lstrcpynW(tmplongpath + lp, shortpath + sp, tmplen + 1);
+
+        if (tmplongpath[lp] == '.')
+        {
+            if (tmplen == 1 || (tmplen == 2 && tmplongpath[lp + 1] == '.'))
+            {
+                lp += tmplen;
+                sp += tmplen;
+                continue;
+            }
+        }
+
         /* Check if the file exists and use the existing file name */
         goit = FindFirstFileW(tmplongpath, &wfd);
         if (goit == INVALID_HANDLE_VALUE)

dlls/kernel32/tests/path.c

@@ -1958,7 +1958,6 @@ static void test_relative_path(void)
     strcpy(buf, "deadbeef");
     ret = pGetLongPathNameA(".", buf, MAX_PATH);
     ok(ret, "GetLongPathName error %d\n", GetLastError());
-todo_wine
     ok(!strcmp(buf, "."), "expected ., got %s\n", buf);
     strcpy(buf, "deadbeef");
     ret = GetShortPathNameA(".", buf, MAX_PATH);
@@ -1968,7 +1967,6 @@ todo_wine
     strcpy(buf, "deadbeef");
     ret = pGetLongPathNameA("..", buf, MAX_PATH);
     ok(ret, "GetLongPathName error %d\n", GetLastError());
-todo_wine
     ok(!strcmp(buf, ".."), "expected .., got %s\n", buf);
     strcpy(buf, "deadbeef");
     ret = GetShortPathNameA("..", buf, MAX_PATH);
@@ -1977,9 +1975,7 @@ todo_wine
 
     strcpy(buf, "deadbeef");
     ret = pGetLongPathNameA("..\\foo\\file", buf, MAX_PATH);
-todo_wine
     ok(ret, "GetLongPathName error %d\n", GetLastError());
-todo_wine
     ok(!strcmp(buf, "..\\foo\\file"), "expected ..\\foo\\file, got %s\n", buf);
     strcpy(buf, "deadbeef");
     ret = GetShortPathNameA("..\\foo\\file", buf, MAX_PATH);