1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/*
* Copyright (C) Andrew Clayton
* Copyright (C) F5, Inc.
*/
#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
#include <zstd.h>
#include "nxt_http_compression.h"
static int
nxt_zstd_init(nxt_http_comp_compressor_ctx_t *ctx)
{
ZSTD_CStream **zstd = &ctx->zstd_ctx;
*zstd = ZSTD_createCStream();
if (*zstd == NULL) {
return -1;
}
ZSTD_initCStream(*zstd, ctx->level);
return 0;
}
static size_t
nxt_zstd_bound(const nxt_http_comp_compressor_ctx_t *ctx, size_t in_len)
{
return ZSTD_compressBound(in_len);
}
static ssize_t
nxt_zstd_compress(nxt_http_comp_compressor_ctx_t *ctx, const uint8_t *in_buf,
size_t in_len, uint8_t *out_buf, size_t out_len, bool last)
{
size_t ret;
ZSTD_CStream *zstd = ctx->zstd_ctx;
ZSTD_inBuffer zinb = { .src = in_buf, .size = in_len };
ZSTD_outBuffer zoutb = { .dst = out_buf, .size = out_len };
ret = ZSTD_compressStream(zstd, &zoutb, &zinb);
if (zinb.pos < zinb.size) {
ret = ZSTD_flushStream(zstd, &zoutb);
}
if (last) {
ret = ZSTD_endStream(zstd, &zoutb);
ZSTD_freeCStream(zstd);
}
if (ZSTD_isError(ret)) {
return -1;
}
return zoutb.pos;
}
const nxt_http_comp_operations_t nxt_http_comp_zstd_ops = {
.init = nxt_zstd_init,
.bound = nxt_zstd_bound,
.deflate = nxt_zstd_compress,
};
|
