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
nghttp3_range_init(nghttp3_range * r,uint64_t begin,uint64_t end)29 void nghttp3_range_init(nghttp3_range *r, uint64_t begin, uint64_t end) {
30 r->begin = begin;
31 r->end = end;
32 }
33
nghttp3_range_intersect(const nghttp3_range * a,const nghttp3_range * b)34 nghttp3_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
nghttp3_range_len(const nghttp3_range * r)45 uint64_t nghttp3_range_len(const nghttp3_range *r) { return r->end - r->begin; }
46
nghttp3_range_eq(const nghttp3_range * a,const nghttp3_range * b)47 int nghttp3_range_eq(const nghttp3_range *a, const nghttp3_range *b) {
48 return a->begin == b->begin && a->end == b->end;
49 }
50
nghttp3_range_cut(nghttp3_range * left,nghttp3_range * right,const nghttp3_range * a,const nghttp3_range * b)51 void 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
nghttp3_range_not_after(const nghttp3_range * a,const nghttp3_range * b)60 int nghttp3_range_not_after(const nghttp3_range *a, const nghttp3_range *b) {
61 return a->end <= b->end;
62 }
63