bpo-45952: Get the C analyzer tool working again. (gh-29882)

There wasn't much that needed to be done. Mostly it was just a few new files that got added.

https://bugs.python.org/issue45952

Tools/c-analyzer/c_parser/__init__.py

@@ -1,3 +1,4 @@
+from c_common.fsutil import match_glob as _match_glob
 from .parser import parse as _parse
 from .preprocessor import get_preprocessor as _get_preprocessor
 
@@ -5,23 +6,32 @@ from .preprocessor import get_preprocessor as _get_preprocessor
 def parse_file(filename, *,
                match_kind=None,
                get_file_preprocessor=None,
+               file_maxsizes=None,
                ):
     if get_file_preprocessor is None:
         get_file_preprocessor = _get_preprocessor()
-    yield from _parse_file(filename, match_kind, get_file_preprocessor)
+    yield from _parse_file(
+            filename, match_kind, get_file_preprocessor, file_maxsizes)
 
 
 def parse_files(filenames, *,
                 match_kind=None,
                 get_file_preprocessor=None,
+                file_maxsizes=None,
                 ):
     if get_file_preprocessor is None:
         get_file_preprocessor = _get_preprocessor()
     for filename in filenames:
-        yield from _parse_file(filename, match_kind, get_file_preprocessor)
+        yield from _parse_file(
+                filename, match_kind, get_file_preprocessor, file_maxsizes)
 
 
-def _parse_file(filename, match_kind, get_file_preprocessor):
+def _parse_file(filename, match_kind, get_file_preprocessor, maxsizes):
+    srckwargs = {}
+    maxsize = _resolve_max_size(filename, maxsizes)
+    if maxsize:
+        srckwargs['maxtext'], srckwargs['maxlines'] = maxsize
+
     # Preprocess the file.
     preprocess = get_file_preprocessor(filename)
     preprocessed = preprocess()
@@ -30,7 +40,7 @@ def _parse_file(filename, match_kind, get_file_preprocessor):
 
     # Parse the lines.
     srclines = ((l.file, l.data) for l in preprocessed if l.kind == 'source')
-    for item in _parse(srclines):
+    for item in _parse(srclines, **srckwargs):
         if match_kind is not None and not match_kind(item.kind):
             continue
         if not item.filename:
@@ -38,6 +48,22 @@ def _parse_file(filename, match_kind, get_file_preprocessor):
         yield item
 
 
+def _resolve_max_size(filename, maxsizes):
+    for pattern, maxsize in (maxsizes.items() if maxsizes else ()):
+        if _match_glob(filename, pattern):
+            break
+    else:
+        return None
+    if not maxsize:
+        return None, None
+    maxtext, maxlines = maxsize
+    if maxtext is not None:
+        maxtext = int(maxtext)
+    if maxlines is not None:
+        maxlines = int(maxlines)
+    return maxtext, maxlines
+
+
 def parse_signature(text):
     raise NotImplementedError