#include <stdbool.h>
#include "warp-buf.h"

void
warp_buf_clear(
  warp_buf_t * const buf
) {
  buf->len = 0;
  buf->dst = 0;
}

bool
warp_buf_has_num(
  const warp_buf_t * const buf
) {
  return buf->len > 0;
}

void
warp_buf_push_num(
  warp_buf_t * const buf,
  const size_t num
) {
  buf->dst = buf->dst * 10 + num;
  buf->len++;
}

void
warp_buf_pop_num(
  warp_buf_t * const buf
) {
  if (buf->len > 0) {
    buf->len--;
    buf->dst /= 10;
  }
}

bool
warp_buf_get(
  const warp_buf_t * const buf,
  size_t * const r
) {
  if (!buf->len) {
    return false;
  }

  if (r) {
    *r = buf->dst;
  }

  return true;
}