# XXX (F841): local variable 'li' is assigned to but never used

from __future__ import print_function
from __future__ import unicode_literals
import os
import re
import sys


debug = False


def get_td_from_function_signature(line, file, num):
    left_paren = line.find('(')
    if left_paren > 0:
        left_paren += 1
        li = line[left_paren:]
        right_paren = line.find(')')
        if right_paren > 0 and right_paren > left_paren and line[right_paren:].find('(') >= 0:
            fname = line[:right_paren]
            fname = fname.lstrip(' ').lstrip('*').lstrip(' ').rstrip(' ')
            if len(fname) > 0:
                if debug:
                    print("from {0}:{1}".format(file, num))
                print("-T {0}".format(fname))


def get_td_from_simple_type(line, file, num):
    line = line.rstrip(' ').rstrip('\t').rstrip(' ').rstrip('\t')
    right_space = line.rfind(' ')
    right_tab = line.rfind('\t')
    sep = right_tab if right_tab > right_space else right_space
    sep += 1
    tname = line[sep:]
    tname = tname.lstrip('*')
    if len(tname) > 0:
        if debug:
            print("from {0}:{1}".format(file, num))
        print("-T {0}".format(tname))


def find_typedefs(file):
    with open(file, 'rb') as f:
        td = False
        td_struct = False
        td_level = 0
        td_line = []
        data = f.read()
        for i, l in enumerate(data.splitlines(False)):
            # Don't try to be too smart: only count lines that begin with 'typedef '
            l = l.rstrip(' ').rstrip('\t')
            if len(l) == 0:
                continue
            if not td:
                if l[:8] != 'typedef ':
                    continue
                else:
                    td = True
                    if l[8:].lstrip(' ').lstrip('\t')[:6] == 'struct':
                        td_struct = True
            if td_struct:
                leftcbrace = l.find('{')
                if leftcbrace >= 0:
                    if td_level == 0:
                        td_line.append(l[:leftcbrace])
                    l = l[leftcbrace + 1:]
                    td_level += 1
                rightcbrace = l.rfind('}')
                if rightcbrace >= 0:
                    td_level -= 1
                    if td_level == 0:
                        td_line.append(l[rightcbrace + 1:])
            else:
                td_line.append(l)
            if len(l) > 0 and l[-1] == ';' and(not td_struct or td_level == 0):
                td_line = ' '.join(td_line)
                td_line = td_line[:-1]
                if len(td_line) > 0:
                    if td_line[-1] == ')':
                        get_td_from_function_signature(td_line, file, i)
                    else:
                        get_td_from_simple_type(td_line, file, i)
                td_line = []
                td = False
                td_struct = False
                td_level = 0


def scan_dir(d):
    for dirpath, dirs, files in os.walk(d):
        for f in files:
            if re.match(r'(?!lt_).+\.(c|cc|h)$', f):
                file = os.path.join(dirpath, f)
                find_typedefs(file)


if __name__ == '__main__':
    if len(sys.argv[1:]) == 0:
        arg = os.getcwd()
    else:
        arg = sys.argv[1]
        scan_dir(arg)
