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added new hook to shift timestamps of samples

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Steffen Vogel 2017-03-12 17:13:55 -03:00
parent 2757011e1b
commit 9771559533
1 changed files with 101 additions and 0 deletions
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lib/hooks/shift.c Normal file
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/** Time shift hook.
*
* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
* @copyright 2017, Institute for Automation of Complex Power Systems, EONERC
*********************************************************************************/
/** @addtogroup hooks Hook functions
* @{
*/
#include "hook.h"
#include "plugin.h"
#include "timing.h"
static int hook_shift(struct hook *h, int when, struct hook_info *k)
{
struct {
struct timespec offset;
enum {
TS_ORIGIN,
TS_RECEIVED,
TS_SENT
} mode;
} *private = hook_storage(h, when, sizeof(*private), NULL, NULL);
switch (when) {
case HOOK_PARSE:
if (!h->parameter)
error("Missing parameter for hook: '%s'", plugin_name(h));
char *endptr;
double offset;
char *off;
char *cpy = strdup(h->parameter);
char *tok1 = strtok(cpy, ",");
char *tok2 = strtok(NULL, ",");
if (tok2) {
off = tok2;
if (!strcmp(tok1, "origin"))
private->mode = TS_ORIGIN;
else if (!strcmp(tok1, "received"))
private->mode = TS_RECEIVED;
else if (!strcmp(tok1, "sent"))
private->mode = TS_SENT;
else
error("Invalid mode parameter for hook '%s'", plugin_name(h));
}
else {
off = tok1;
private->mode = TS_ORIGIN;
}
offset = strtod(off, &endptr);
if (endptr == off)
error("Invalid offset parameter for hook '%s'", plugin_name(h));
private->offset = time_from_double(offset);
free(cpy);
break;
case HOOK_READ:
for (int i = 0; i < k->cnt; i++) {
struct timespec *ts;
switch (private->mode) {
case TS_ORIGIN: ts = &k->smps[i]->ts.origin; break;
case TS_RECEIVED: ts = &k->smps[i]->ts.received; break;
case TS_SENT: ts = &k->smps[i]->ts.sent; break;
}
*ts = time_add(ts, &private->offset);
}
return k->cnt;
}
return 0;
}
static struct plugin p = {
.name = "shift",
.description = "Shift the origin timestamp of samples",
.type = PLUGIN_TYPE_HOOK,
.hook = {
.priority = 99,
.history = 0,
.cb = hook_shift,
.type = HOOK_STORAGE | HOOK_READ
}
};
REGISTER_PLUGIN(&p)
/** @} */