75 lines
2.4 KiB
Python
Executable File
75 lines
2.4 KiB
Python
Executable File
#!/usr/bin/python
|
|
# Copyright (c) 2017, The Tor Project, Inc.
|
|
# See LICENSE for licensing information
|
|
|
|
import re
|
|
|
|
LINE_OBVIOUSNESS_LIMIT = 4
|
|
|
|
class Problem(Exception):
|
|
pass
|
|
|
|
def uncomment(s):
|
|
s = re.sub(r'//.*','',s)
|
|
s = re.sub(r'/\*.*','',s)
|
|
return s.strip()
|
|
|
|
def translate(f_in, f_out):
|
|
whole_file = []
|
|
stack = []
|
|
cur_level = whole_file
|
|
lineno = 0
|
|
for line in f_in:
|
|
lineno += 1
|
|
m = re.match(r'\s*#\s*(if|ifdef|ifndef|else|endif|elif)\b\s*(.*)',
|
|
line)
|
|
if not m:
|
|
f_out.write(line)
|
|
continue
|
|
command,rest = m.groups()
|
|
if command in ("if", "ifdef", "ifndef"):
|
|
# The #if directive pushes us one level lower on the stack.
|
|
if command == 'ifdef':
|
|
rest = "defined(%s)"%uncomment(rest)
|
|
elif command == 'ifndef':
|
|
rest = "!defined(%s)"%uncomment(rest)
|
|
elif rest.endswith("\\"):
|
|
rest = rest[:-1]+"..."
|
|
|
|
rest = uncomment(rest)
|
|
|
|
new_level = [ (command, rest, lineno) ]
|
|
stack.append(cur_level)
|
|
cur_level = new_level
|
|
f_out.write(line)
|
|
elif command in ("else", "elif"):
|
|
if len(cur_level) == 0 or cur_level[-1][0] == 'else':
|
|
raise Problem("Unexpected #%s on %d"% (command,lineno))
|
|
if (len(cur_level) == 1 and command == 'else' and
|
|
lineno > cur_level[0][2] + LINE_OBVIOUSNESS_LIMIT):
|
|
f_out.write("#else /* !(%s) */\n"%cur_level[0][1])
|
|
else:
|
|
f_out.write(line)
|
|
cur_level.append((command, rest, lineno))
|
|
else:
|
|
assert command == 'endif'
|
|
if len(stack) == 0:
|
|
raise Problem("Unmatched #%s on %s"% (command,lineno))
|
|
if lineno <= cur_level[0][2] + LINE_OBVIOUSNESS_LIMIT:
|
|
f_out.write(line)
|
|
elif len(cur_level) == 1 or (
|
|
len(cur_level) == 2 and cur_level[1][0] == 'else'):
|
|
f_out.write("#endif /* %s */\n"%cur_level[0][1])
|
|
else:
|
|
f_out.write("#endif /* %s || ... */\n"%cur_level[0][1])
|
|
cur_level = stack.pop()
|
|
if len(stack) or cur_level != whole_file:
|
|
raise Problem("Missing #endif")
|
|
|
|
import sys,os
|
|
for fn in sys.argv[1:]:
|
|
with open(fn+"_OUT", 'w') as output_file:
|
|
translate(open(fn, 'r'), output_file)
|
|
os.rename(fn+"_OUT", fn)
|
|
|