import os


# 找到指定后綴的文件
def find_type(path:str,fix:str):
    dlist=os.listdir(path)
    file_list=[]
    for i in dlist:
        ps=os.path.join(path, i)
        if os.path.isdir(ps):
            file_list+=find_type(ps,fix)
        else:
            if(ps[-len(fix):]==fix):
                file_list.append(ps)
    return file_list

def conv(file:str):
    s=""
    try:
        with open(file,encoding="gb2312") as f:
            s=f.read()
        os.remove(file)
        with open(file,mode="w+",encoding="utf-8") as f:
            f.write(s)
    except Exception as e:
        print("conv failed",file)

del_comm("main.c","http://",["/*","*/"])

# 刪除所有注釋
def del_comm(file:str,line_comm:str,blok_comm:list[str]):
    text=""
    try:
        with open(file,encoding="utf-8") as f:
            lines=f.readlines()
    except Exception as e:
        print("decode failed",file)
        return
    for i in range(len(lines)):
        index=lines[i].find(line_comm)
        if(index>=0):
            lstr=lines[i][:index]
        else:
            lstr=lines[i].rstrip()
        if(len(lstr.strip())>0):
            text+=lstr+'\n'
        elif(text[-2:]=='\\\n'):
            text+='\n'
    index_start=0
    text_out=""
    while True:
        index=text.find(blok_comm[0],index_start)
        index_end=text.find(blok_comm[1],index)
        if(index>=0 and index_end>index):
            text_out+= text[index_start:index]
            index_start=index_end+len(blok_comm[1])
        else:
            text_out+=text[index_start:]
            break
    with open(file,mode="w+",encoding="utf-8") as f:
        f.write(text_out)
        

def simplified(text:str):
  '''
  返回一個新字符串，去除過多的空白字符
  '''
  space=['\t', '\n', '\v', '\f', '\r',  ' ']

  r=""
  start=0
  is_empty=False
  while text[start] in space:
    start+=1
  for i in range(start,len(text)):
    if text[i] in space:
      is_empty=True
    else:
      if(is_empty==True):
        r+=" "
        is_empty=False
      r+=text[i]
  return r