#include "bin_oper.h"
#include "crc.h"

static unsigned long g_crc = 263;
void set_crc(const char *p_crc_binary)
{
  g_crc = bin2udec(p_crc_binary);
  return;
}
unsigned long crc(const char *p_data)
{
  int j = 0, i = 8;
  unsigned long data, checked = 0;
  while(i == 8)
  {
    for(i = 0; i < 8 && p_data[i + j*8]; ++i);
    if(!i) break;
    data = bin2udec_range(p_data, j*8, i) + (checked << i);
    checked = data%g_crc;
    ++j;
  }
  return(checked);
}