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13#include <stdio.h>
14#include <stdlib.h>
15#include <unistd.h>
16#include <fcntl.h>
17#include <sys/socket.h>
18#include <netinet/in.h>
19#include <arpa/inet.h>
20#include <string.h>
21
22#include "utils.h"
23#include "tc_util.h"
24#include "tc_common.h"
25
26static void est_help(void);
27
28static void est_help(void)
29{
30 fprintf(stderr,
31 "Usage: ... estimator INTERVAL TIME-CONST\n"
32 " INTERVAL is interval between measurements\n"
33 " TIME-CONST is averaging time constant\n"
34 "Example: ... est 1sec 8sec\n");
35}
36
37int parse_estimator(int *p_argc, char ***p_argv, struct tc_estimator *est)
38{
39 int argc = *p_argc;
40 char **argv = *p_argv;
41 unsigned int A, time_const;
42
43 NEXT_ARG();
44 if (est->ewma_log)
45 duparg("estimator", *argv);
46 if (matches(*argv, "help") == 0)
47 est_help();
48 if (get_time(&A, *argv))
49 invarg("estimator", "invalid estimator interval");
50 NEXT_ARG();
51 if (matches(*argv, "help") == 0)
52 est_help();
53 if (get_time(&time_const, *argv))
54 invarg("estimator", "invalid estimator time constant");
55 if (tc_setup_estimator(A, time_const, est) < 0) {
56 fprintf(stderr, "Error: estimator parameters are out of range.\n");
57 return -1;
58 }
59 if (show_raw)
60 fprintf(stderr, "[estimator i=%hhd e=%u]\n", est->interval, est->ewma_log);
61 *p_argc = argc;
62 *p_argv = argv;
63 return 0;
64}
65