1 /*
2 * nghttp3
3 *
4 * Copyright (c) 2019 nghttp3 contributors
5 * Copyright (c) 2016 nghttp2 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_rcbuf.h"
27
28 #include <assert.h>
29
30 #include "nghttp3_mem.h"
31 #include "nghttp3_str.h"
32
nghttp3_rcbuf_new(nghttp3_rcbuf ** rcbuf_ptr,size_t size,const nghttp3_mem * mem)33 int nghttp3_rcbuf_new(nghttp3_rcbuf **rcbuf_ptr, size_t size,
34 const nghttp3_mem *mem) {
35 uint8_t *p;
36
37 p = nghttp3_mem_malloc(mem, sizeof(nghttp3_rcbuf) + size);
38 if (p == NULL) {
39 return NGHTTP3_ERR_NOMEM;
40 }
41
42 *rcbuf_ptr = (void *)p;
43
44 (*rcbuf_ptr)->mem = mem;
45 (*rcbuf_ptr)->base = p + sizeof(nghttp3_rcbuf);
46 (*rcbuf_ptr)->len = size;
47 (*rcbuf_ptr)->ref = 1;
48
49 return 0;
50 }
51
nghttp3_rcbuf_new2(nghttp3_rcbuf ** rcbuf_ptr,const uint8_t * src,size_t srclen,const nghttp3_mem * mem)52 int nghttp3_rcbuf_new2(nghttp3_rcbuf **rcbuf_ptr, const uint8_t *src,
53 size_t srclen, const nghttp3_mem *mem) {
54 int rv;
55 uint8_t *p;
56
57 rv = nghttp3_rcbuf_new(rcbuf_ptr, srclen + 1, mem);
58 if (rv != 0) {
59 return rv;
60 }
61
62 (*rcbuf_ptr)->len = srclen;
63 p = (*rcbuf_ptr)->base;
64
65 if (srclen) {
66 p = nghttp3_cpymem(p, src, srclen);
67 }
68
69 *p = '\0';
70
71 return 0;
72 }
73
74 /*
75 * Frees |rcbuf| itself, regardless of its reference cout.
76 */
nghttp3_rcbuf_del(nghttp3_rcbuf * rcbuf)77 void nghttp3_rcbuf_del(nghttp3_rcbuf *rcbuf) {
78 nghttp3_mem_free(rcbuf->mem, rcbuf);
79 }
80
nghttp3_rcbuf_incref(nghttp3_rcbuf * rcbuf)81 void nghttp3_rcbuf_incref(nghttp3_rcbuf *rcbuf) {
82 if (rcbuf->ref == -1) {
83 return;
84 }
85
86 ++rcbuf->ref;
87 }
88
nghttp3_rcbuf_decref(nghttp3_rcbuf * rcbuf)89 void nghttp3_rcbuf_decref(nghttp3_rcbuf *rcbuf) {
90 if (rcbuf == NULL || rcbuf->ref == -1) {
91 return;
92 }
93
94 assert(rcbuf->ref > 0);
95
96 if (--rcbuf->ref == 0) {
97 nghttp3_rcbuf_del(rcbuf);
98 }
99 }
100
nghttp3_rcbuf_get_buf(const nghttp3_rcbuf * rcbuf)101 nghttp3_vec nghttp3_rcbuf_get_buf(const nghttp3_rcbuf *rcbuf) {
102 nghttp3_vec res = {rcbuf->base, rcbuf->len};
103 return res;
104 }
105
nghttp3_rcbuf_is_static(const nghttp3_rcbuf * rcbuf)106 int nghttp3_rcbuf_is_static(const nghttp3_rcbuf *rcbuf) {
107 return rcbuf->ref == -1;
108 }
109