Fix \file detection for c style checker

check_source/check_style_c.py

@@ -1356,11 +1356,15 @@ def scan_source(fp, code, args, fn):
         elif tok.type in Token.Comment:
             doxyfn = None
             if "\\file" in tok.text:
-                doxyfn = tok.text.split("\\file", 1)[1].strip().split()[0]
+                doxyfn = tok.text.split("\\file", 1)[1]
             elif "@file" in tok.text:
-                doxyfn = tok.text.split("@file", 1)[1].strip().split()[0]
+                doxyfn = tok.text.split("@file", 1)[1]
 
             if doxyfn is not None:
+                doxyfn = doxyfn.lstrip(" \t")
+                # Blank file is acceptable in this case just ignore contents.
+                if not doxyfn.startswith("\n"):
+                    doxyfn = doxyfn.split()[0]
                     doxyfn_base = os.path.basename(doxyfn)
                     if doxyfn_base != filepath_base:
                         warning(fn, "E151", "doxygen filename mismatch %s != %s" % (doxyfn_base, filepath_base), i, i)