/*

 * ngtcp2

 *

 * Copyright (c) 2017 ngtcp2 contributors

 *

 * Permission is hereby granted, free of charge, to any person obtaining

 * a copy of this software and associated documentation files (the

 * "Software"), to deal in the Software without restriction, including

 * without limitation the rights to use, copy, modify, merge, publish,

 * distribute, sublicense, and/or sell copies of the Software, and to

 * permit persons to whom the Software is furnished to do so, subject to

 * the following conditions:

 *

 * The above copyright notice and this permission notice shall be

 * included in all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE

 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION

 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION

 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 */

#include "ngtcp2_range.h"

#include "ngtcp2_macro.h"

void ngtcp2_range_init(ngtcp2_range *r, uint64_t begin, uint64_t end) {

  *r = (ngtcp2_range){

    .begin = begin,

    .end = end,

  };

}

ngtcp2_range ngtcp2_range_intersect(const ngtcp2_range *a,

                                    const ngtcp2_range *b) {

  ngtcp2_range r;

  uint64_t begin = ngtcp2_max_uint64(a->begin, b->begin);

  uint64_t end = ngtcp2_min_uint64(a->end, b->end);

  if (begin < end) {

    ngtcp2_range_init(&r, begin, end);

  } else {

    r = (ngtcp2_range){0};

  }

  return r;

}

uint64_t ngtcp2_range_len(const ngtcp2_range *r) { return r->end - r->begin; }

int ngtcp2_range_eq(const ngtcp2_range *a, const ngtcp2_range *b) {

  return a->begin == b->begin && a->end == b->end;

}

void ngtcp2_range_cut(ngtcp2_range *left, ngtcp2_range *right,

                      const ngtcp2_range *a, const ngtcp2_range *b) {

  /* Assume that b is included in a */

  *left = (ngtcp2_range){

    .begin = a->begin,

    .end = b->begin,

  };

  *right = (ngtcp2_range){

    .begin = b->end,

    .end = a->end,

  };

}

int ngtcp2_range_not_after(const ngtcp2_range *a, const ngtcp2_range *b) {

  return a->end <= b->end;

}