module EasyCRC

static VALUE
easy_crc_crc32(VALUE self, VALUE path, VALUE seed)
{
  easy_crc32_params params;
  VALUE vparams;

  if(TYPE(path) != T_STRING)
    rb_raise(rb_eTypeError, "invalid type for path name");
  if(TYPE(seed) != T_FIXNUM)
    rb_raise(rb_eTypeError, "invalid type for seed");

  params.path  = StringValueCStr(path);
  params.fd    = NULL;
  if(seed == Qnil)
    params.crc   = 0;
  else
    params.crc   = FIX2LONG(seed);
  params.error = 0;
  params.stop  = false;

  vparams = Data_Wrap_Struct(0, 0, 0, &params);

  rb_ensure(easy_crc_crc32_start, vparams, easy_crc_crc32_cleanup, vparams);

  if(params.error == 1)
    rb_raise(rb_eIOError, "failed to open file");

  if(params.error == 2)
    rb_raise(rb_eThreadError, "thread stopped");

  if(params.error == 3)
    rb_raise(rb_eIOError, "failed to read from file");

  return INT2FIX(params.crc);
}

# File lib/easy-crc.rb, line 5
def self.crc32(path, seed = 0)
  _crc32(path, seed)
end