bpo-36876: Small adjustments to the C-analyzer tool. (GH-23045)

This is a little bit of clean-up, small fixes, and additional helpers prior to building an updated & accurate list of globals to eliminate.

Tools/c-analyzer/c_parser/parser/_info.py

@@ -1,3 +1,5 @@
+import re
+
 from ..info import KIND, ParsedItem, FileInfo
 
 
@@ -121,6 +123,19 @@ class SourceInfo:
     def done(self):
         self._set_ready()
 
+    def too_much(self, maxtext, maxlines):
+        if maxtext and len(self.text) > maxtext:
+            pass
+        elif maxlines and self.end - self.start > maxlines:
+            pass
+        else:
+            return False
+
+        #if re.fullmatch(r'[^;]+\[\][ ]*=[ ]*[{]([ ]*\d+,)*([ ]*\d+,?)\s*',
+        #                self._current.text):
+        #    return False
+        return True
+
     def _set_ready(self):
         if self._current is None:
             self._ready = False