1 /*
2 * ngtcp2
3 *
4 * Copyright (c) 2017 ngtcp2 contributors
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining
7 * a copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sublicense, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be
15 * included in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25 #include "ngtcp2_buf.h"
26 #include "ngtcp2_mem.h"
27
ngtcp2_buf_init(ngtcp2_buf * buf,uint8_t * begin,size_t len)28 void ngtcp2_buf_init(ngtcp2_buf *buf, uint8_t *begin, size_t len) {
29 buf->begin = buf->pos = buf->last = begin;
30 buf->end = begin + len;
31 }
32
ngtcp2_buf_reset(ngtcp2_buf * buf)33 void ngtcp2_buf_reset(ngtcp2_buf *buf) { buf->pos = buf->last = buf->begin; }
34
ngtcp2_buf_cap(const ngtcp2_buf * buf)35 size_t ngtcp2_buf_cap(const ngtcp2_buf *buf) {
36 return (size_t)(buf->end - buf->begin);
37 }
38
ngtcp2_buf_chain_new(ngtcp2_buf_chain ** pbufchain,size_t len,const ngtcp2_mem * mem)39 int ngtcp2_buf_chain_new(ngtcp2_buf_chain **pbufchain, size_t len,
40 const ngtcp2_mem *mem) {
41 *pbufchain = ngtcp2_mem_malloc(mem, sizeof(ngtcp2_buf_chain) + len);
42 if (*pbufchain == NULL) {
43 return NGTCP2_ERR_NOMEM;
44 }
45
46 (*pbufchain)->next = NULL;
47
48 ngtcp2_buf_init(&(*pbufchain)->buf,
49 (uint8_t *)(*pbufchain) + sizeof(ngtcp2_buf_chain), len);
50
51 return 0;
52 }
53
ngtcp2_buf_chain_del(ngtcp2_buf_chain * bufchain,const ngtcp2_mem * mem)54 void ngtcp2_buf_chain_del(ngtcp2_buf_chain *bufchain, const ngtcp2_mem *mem) {
55 ngtcp2_mem_free(mem, bufchain);
56 }
57