Mercurial > hg > nginx
comparison src/http/v2/ngx_http_v2_encode.c @ 7229:87e9e4aabf1b
HTTP/2: externalized various constants and interfaces.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Sat, 17 Mar 2018 23:04:20 +0300 |
parents | |
children | 336084ff943b |
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7228:0f811890f2f0 | 7229:87e9e4aabf1b |
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1 | |
2 /* | |
3 * Copyright (C) Nginx, Inc. | |
4 * Copyright (C) Valentin V. Bartenev | |
5 */ | |
6 | |
7 | |
8 #include <ngx_config.h> | |
9 #include <ngx_core.h> | |
10 #include <ngx_http.h> | |
11 | |
12 | |
13 static u_char *ngx_http_v2_write_int(u_char *pos, ngx_uint_t prefix, | |
14 ngx_uint_t value); | |
15 | |
16 | |
17 u_char * | |
18 ngx_http_v2_string_encode(u_char *dst, u_char *src, size_t len, u_char *tmp, | |
19 ngx_uint_t lower) | |
20 { | |
21 size_t hlen; | |
22 | |
23 hlen = ngx_http_v2_huff_encode(src, len, tmp, lower); | |
24 | |
25 if (hlen > 0) { | |
26 *dst = NGX_HTTP_V2_ENCODE_HUFF; | |
27 dst = ngx_http_v2_write_int(dst, ngx_http_v2_prefix(7), hlen); | |
28 return ngx_cpymem(dst, tmp, hlen); | |
29 } | |
30 | |
31 *dst = NGX_HTTP_V2_ENCODE_RAW; | |
32 dst = ngx_http_v2_write_int(dst, ngx_http_v2_prefix(7), len); | |
33 | |
34 if (lower) { | |
35 ngx_strlow(dst, src, len); | |
36 return dst + len; | |
37 } | |
38 | |
39 return ngx_cpymem(dst, src, len); | |
40 } | |
41 | |
42 | |
43 static u_char * | |
44 ngx_http_v2_write_int(u_char *pos, ngx_uint_t prefix, ngx_uint_t value) | |
45 { | |
46 if (value < prefix) { | |
47 *pos++ |= value; | |
48 return pos; | |
49 } | |
50 | |
51 *pos++ |= prefix; | |
52 value -= prefix; | |
53 | |
54 while (value >= 128) { | |
55 *pos++ = value % 128 + 128; | |
56 value /= 128; | |
57 } | |
58 | |
59 *pos++ = (u_char) value; | |
60 | |
61 return pos; | |
62 } |