blob: 9ed9a1538340333ccb8d8ad99b1356abb5ea35b5 (
plain)
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
|
#pragma once
#ifdef __cplusplus
extern "C"
{
#endif
#include "hdr/hdr_histogram.h"
#include "hdr/hdr_histogram_log.h"
/*
This is used for exporting json message to kafka, which is then read by JAVA.
For java decoding: refer to
https://github.com/HdrHistogram/HdrHistogram
AbstractHistogram.java:synchronized public int encodeIntoCompressedByteBuffer()
java cookie:
private static final int V0EncodingCookieBase = 0x1c849308;
private static final int V0CompressedEncodingCookieBase = 0x1c849309;
private static final int V1EncodingCookieBase = 0x1c849301;
private static final int V1CompressedEncodingCookieBase = 0x1c849302;
private static final int V2EncodingCookieBase = 0x1c849303; <-------- use this
private static final int V2CompressedEncodingCookieBase = 0x1c849304;
exported buffer is after base64 encoding./
*/
void histogram_encode_into_b64(struct hdr_histogram *hdr, char **buffer, size_t *buffer_size);
struct hdr_histogram *histogram_decode_from_b64(const char *buffer, size_t buffer_size);
/*
the most simple and fast version of encoding. No compression, no base64 encoding, no LEB128 encoding, no user-defined extra parameters, only carry the most basic information.
*/
void histogram_encode_into_blob(const struct hdr_histogram *hdr, char **buffer, size_t *blob_len);
/*
decode from buffer output by histogram_encode_into_blob.
*/
struct hdr_histogram *histogram_decode_from_blob(const char *buffer, size_t blob_len);
long long hdr_count_le_value(const struct hdr_histogram* h, long long value);
#ifdef __cplusplus
}
#endif
|
