import subprocess

def _lnomap (line) :
    if line.startswith("#") :
        try :
            return int(line.split(None, 2)[1])
        except :
            pass

def cpp (path, args) :
    lmap = {}
    code = []
    args = ["cpp", "-D__CCT__"] + args + [path]
    pos = 1
    out = subprocess.check_output(args)
    for line in (l.rstrip() for l in out.decode().splitlines()) :
        num = _lnomap(line)
        if num is not None :
            pos = num
        else :
            code.append(line)
            lmap[len(code)] = pos
            pos += 1
    return "\n".join(code), lmap

def test (path) :
    old = [l.rstrip() for l in open(path)]
    new, lno = cpp(path, "x86", [])
    new = [l.rstrip() for l in new.splitlines()]
    for i, l in enumerate(new) :
        s = old[lno.get(i+1, i+1) - 1]
        if s != l :
            print("@%s -> %s" % (i+1, lno.get(i+1, i+1) - 1))
            print("<", s)
            print(">", l)
    return old, new, lno