#include <stdlib.h>
#include <string.h>

int
bt_skip_func(const __uint32_t len_limit, const __uint8_t *cur,
	     int delta, __uint32_t len) {

  const __uint8_t *pb = cur - delta;

  while (++len != len_limit) {
    if (pb[len] != cur[len])
      break;
    if (++len == len_limit)
      break;
    if (pb[len] != cur[len])
      break;
    if (++len == len_limit)
      break;
    if (pb[len] != cur[len])
      break;
    if (++len == len_limit)
      break;
    if (pb[len] != cur[len])
      break;
  }

  return len;
}

int main (int argc, char *argv[]) {

  char *text_input = "ttttttttttttttttthis is some text that should be longer";
  int len_limit = strlen (text_input);
  int pos = 0;

  int cur_match = 0;
  int depth = 0;

  int result = bt_skip_func(len_limit, text_input + 3, 3, 1);
}