1/*
2 * nghttp3
3 *
4 * Copyright (c) 2019 nghttp3 contributors
5 * Copyright (c) 2017 ngtcp2 contributors
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining
8 * a copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sublicense, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be
16 * included in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
22 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 */
26#include "nghttp3_range.h"
27#include "nghttp3_macro.h"
28
29void nghttp3_range_init(nghttp3_range *r, uint64_t begin, uint64_t end) {
30  r->begin = begin;
31  r->end = end;
32}
33
34nghttp3_range nghttp3_range_intersect(const nghttp3_range *a,
35                                      const nghttp3_range *b) {
36  nghttp3_range r = {0, 0};
37  uint64_t begin = nghttp3_max(a->begin, b->begin);
38  uint64_t end = nghttp3_min(a->end, b->end);
39  if (begin < end) {
40    nghttp3_range_init(&r, begin, end);
41  }
42  return r;
43}
44
45uint64_t nghttp3_range_len(const nghttp3_range *r) { return r->end - r->begin; }
46
47int nghttp3_range_eq(const nghttp3_range *a, const nghttp3_range *b) {
48  return a->begin == b->begin && a->end == b->end;
49}
50
51void nghttp3_range_cut(nghttp3_range *left, nghttp3_range *right,
52                       const nghttp3_range *a, const nghttp3_range *b) {
53  /* Assume that b is included in a */
54  left->begin = a->begin;
55  left->end = b->begin;
56  right->begin = b->end;
57  right->end = a->end;
58}
59
60int nghttp3_range_not_after(const nghttp3_range *a, const nghttp3_range *b) {
61  return a->end <= b->end;
62}
63