+ if not matched:
+ return
+
+ # remove empty #ifdef ... #endif, successive blank lines
+ pattern_if = re.compile(r'#\s*if(def|ndef)?\W') # #if, #ifdef, #ifndef
+ pattern_elif = re.compile(r'#\s*el(if|se)\W') # #elif, #else
+ pattern_endif = re.compile(r'#\s*endif\W') # #endif
+ pattern_blank = re.compile(r'^\s*$') # empty line
+
+ while True:
+ old_matched = copy.copy(matched)
+ extend_matched_lines(lines, matched, [pattern_if],
+ [pattern_endif], True, True)
+ extend_matched_lines(lines, matched, [pattern_elif],
+ [pattern_elif, pattern_endif], True, False)
+ extend_matched_lines(lines, matched, [pattern_if, pattern_elif],
+ [pattern_blank], False, True)
+ extend_matched_lines(lines, matched, [pattern_blank],
+ [pattern_elif, pattern_endif], True, False)
+ extend_matched_lines(lines, matched, [pattern_blank],
+ [pattern_blank], True, False)
+ if matched == old_matched:
+ break
+
+ tolines = copy.copy(lines)
+
+ for i in reversed(matched):
+ tolines.pop(i)
+
+ show_diff(lines, tolines, header_path, options.color)
+
+ if options.dry_run: