--- /dev/null
+# Copyright (C) 2011 by the Massachusetts Institute of Technology.
+# All rights reserved.
+#
+# Export of this software from the United States of America may
+# require a specific license from the United States Government.
+# It is the responsibility of any person or organization contemplating
+# export to obtain such a license before exporting.
+#
+# WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+# distribute this software and its documentation for any purpose and
+# without fee is hereby granted, provided that the above copyright
+# notice appear in all copies and that both that copyright notice and
+# this permission notice appear in supporting documentation, and that
+# the name of M.I.T. not be used in advertising or publicity pertaining
+# to distribution of the software without specific, written prior
+# permission. Furthermore if you modify this software you must label
+# your software as modified software and not distribute it in such a
+# fashion that it might be confused with the original M.I.T. software.
+# M.I.T. makes no representations about the suitability of
+# this software for any purpose. It is provided "as is" without express
+# or implied warranty.
+
+# This program is intended to be used by "make check-copyright". It
+# checks for violations of the coding standards related to copyright
+# and license statements in source code comments.
+
+import os
+import sys
+import re
+
+def warn(fname, ln, msg):
+ print '%s: %d: %s' % (fname, ln + 1, msg)
+
+def indicates_license(line):
+ return 'Copyright' in line or 'COPYRIGHT' in line or 'License' in line
+
+# Check a comment for boilerplate violations. Return true if the comment
+# is a license statement.
+def check_comment(comment, fname, ln, code_seen, nonlicense_seen):
+ text_seen = False
+ is_license = False
+ for line in comment:
+ if not is_license and indicates_license(line):
+ is_license = True
+ if text_seen:
+ warn(fname, ln, 'License begins after first line of comment')
+ elif code_seen:
+ warn(fname, ln, 'License after code')
+ elif nonlicense_seen:
+ warn(fname, ln, 'License after non-license comments')
+ break
+ # DB2 licenses start with '/*-' and we don't want to change them.
+ if line != '' and line != '-':
+ text_seen = True
+ return is_license
+
+def check_file(lines, fname):
+ # Skip emacs mode line if present.
+ ln = 0
+ if '-*- mode: c;' in lines[ln]:
+ ln += 1
+
+ # Check filename comment if present.
+ m = re.match(r'/\* ([^ ]*)( - .*)? \*/', lines[ln])
+ if m:
+ if m.group(1) != fname:
+ warn(fname, ln, 'Wrong filename in comment')
+ ln += 1
+
+ # Scan for license statements.
+ in_comment = False
+ code_seen = False
+ nonlicense_seen = False
+ for line in lines[ln:]:
+ # Strip out whitespace and comments contained within a line.
+ if not in_comment:
+ line = re.sub(r'/\*.*?\*/', '', line)
+ line = line.strip()
+
+ if not in_comment and '/*' in line:
+ (line, sep, comment_part) = line.partition('/*')
+ comment = [comment_part.strip()]
+ comment_starts_at = ln
+ in_comment = True
+ elif in_comment and '*/' not in line:
+ comment.append(line.lstrip('*').lstrip())
+ elif in_comment:
+ (comment_part, sep, line) = line.partition('*/')
+ comment.append(comment_part.strip())
+ is_license = check_comment(comment, fname, comment_starts_at,
+ code_seen, nonlicense_seen)
+ nonlicense_seen = nonlicense_seen or not is_license
+ in_comment = False
+ elif line.strip() != '':
+ code_seen = True
+
+ ln += 1
+
+for fname in sys.argv[1:]:
+ if fname.startswith('./'):
+ fname = fname[2:]
+ f = open(fname)
+ lines = f.readlines()
+ f.close()
+ check_file(lines, fname)