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/*
* Copyright (c) 2017 David Lamparter, for NetDEF, Inc.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _FRR_MONOTIME_H
#define _FRR_MONOTIME_H
#include <stdint.h>
#include <time.h>
#include <sys/time.h>
#ifdef __cplusplus
extern "C" {
#endif
struct fbuf;
struct printfrr_eargs;
#ifndef TIMESPEC_TO_TIMEVAL
/* should be in sys/time.h on BSD & Linux libcs */
#define TIMESPEC_TO_TIMEVAL(tv, ts) \
do { \
(tv)->tv_sec = (ts)->tv_sec; \
(tv)->tv_usec = (ts)->tv_nsec / 1000; \
} while (0)
#endif
#ifndef TIMEVAL_TO_TIMESPEC
/* should be in sys/time.h on BSD & Linux libcs */
#define TIMEVAL_TO_TIMESPEC(tv, ts) \
do { \
(ts)->tv_sec = (tv)->tv_sec; \
(ts)->tv_nsec = (tv)->tv_usec * 1000; \
} while (0)
#endif
/* Linux/glibc is sadly missing these timespec helpers */
#ifndef timespecadd
#define timespecadd(tsp, usp, vsp) \
do { \
(vsp)->tv_sec = (tsp)->tv_sec + (usp)->tv_sec; \
(vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec; \
if ((vsp)->tv_nsec >= 1000000000L) { \
(vsp)->tv_sec++; \
(vsp)->tv_nsec -= 1000000000L; \
} \
} while (0)
#endif
#ifndef timespecsub
#define timespecsub(tsp, usp, vsp) \
do { \
(vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec; \
(vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec; \
if ((vsp)->tv_nsec < 0) { \
(vsp)->tv_sec--; \
(vsp)->tv_nsec += 1000000000L; \
} \
} while (0)
#endif
static inline time_t monotime(struct timeval *tvo)
{
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
if (tvo) {
TIMESPEC_TO_TIMEVAL(tvo, &ts);
}
return ts.tv_sec;
}
#define ONE_DAY_SECOND (60 * 60 * 24)
#define ONE_WEEK_SECOND (ONE_DAY_SECOND * 7)
#define ONE_YEAR_SECOND (ONE_DAY_SECOND * 365)
/* the following two return microseconds, not time_t!
*
* also, they're negative forms of each other, but having both makes the
* code more readable
*/
static inline int64_t monotime_since(const struct timeval *ref,
struct timeval *out)
{
struct timeval tv;
monotime(&tv);
timersub(&tv, ref, &tv);
if (out)
*out = tv;
return (int64_t)tv.tv_sec * 1000000LL + tv.tv_usec;
}
static inline int64_t monotime_until(const struct timeval *ref,
struct timeval *out)
{
struct timeval tv;
monotime(&tv);
timersub(ref, &tv, &tv);
if (out)
*out = tv;
return (int64_t)tv.tv_sec * 1000000LL + tv.tv_usec;
}
static inline time_t monotime_to_realtime(const struct timeval *mono,
struct timeval *realout)
{
struct timeval delta, real;
monotime_since(mono, &delta);
gettimeofday(&real, NULL);
timersub(&real, &delta, &real);
if (realout)
*realout = real;
return real.tv_sec;
}
/* Char buffer size for time-to-string api */
#define MONOTIME_STRLEN 32
static inline char *time_to_string(time_t ts, char *buf)
{
struct timeval tv;
time_t tbuf;
monotime(&tv);
tbuf = time(NULL) - (tv.tv_sec - ts);
return ctime_r(&tbuf, buf);
}
/* Convert interval to human-friendly string, used in cli output e.g. */
static inline const char *frrtime_to_interval(time_t t, char *buf,
size_t buflen)
{
struct tm tm;
gmtime_r(&t, &tm);
if (t < ONE_DAY_SECOND)
snprintf(buf, buflen, "%02d:%02d:%02d", tm.tm_hour, tm.tm_min,
tm.tm_sec);
else if (t < ONE_WEEK_SECOND)
snprintf(buf, buflen, "%dd%02dh%02dm", tm.tm_yday, tm.tm_hour,
tm.tm_min);
else
snprintf(buf, buflen, "%02dw%dd%02dh", tm.tm_yday / 7,
tm.tm_yday - ((tm.tm_yday / 7) * 7), tm.tm_hour);
return buf;
}
enum {
/* n/a - input was seconds precision, don't print any fractional */
TIMEFMT_SECONDS = (1 << 0),
/* caller is directly invoking printfrr_time and has pre-specified
* I/Iu/Is/M/Mu/Ms/R/Ru/Rs (for printing timers)
*/
TIMEFMT_PRESELECT = (1 << 1),
/* don't print any output - this is needed for invoking printfrr_time
* from another printfrr extensions to skip over flag characters
*/
TIMEFMT_SKIP = (1 << 2),
/* use spaces in appropriate places */
TIMEFMT_SPACE = (1 << 3),
/* input interpretations: */
TIMEFMT_REALTIME = (1 << 8),
TIMEFMT_MONOTONIC = (1 << 9),
TIMEFMT_SINCE = (1 << 10),
TIMEFMT_UNTIL = (1 << 11),
TIMEFMT_ABSOLUTE = TIMEFMT_REALTIME | TIMEFMT_MONOTONIC,
TIMEFMT_ANCHORS = TIMEFMT_SINCE | TIMEFMT_UNTIL,
/* calendaric formats: */
TIMEFMT_ISO8601 = (1 << 16),
/* interval formats: */
/* 't' - use [t]raditional 3-block format */
TIMEFMT_BASIC = (1 << 24),
/* 'm' - select mm:ss */
TIMEFMT_MMSS = (1 << 25),
/* 'h' - select hh:mm:ss */
TIMEFMT_HHMMSS = (1 << 26),
/* 'd' - print as decimal number of seconds */
TIMEFMT_DECIMAL = (1 << 27),
/* 'mx'/'hx' - replace zero value with "--:--" or "--:--:--" */
TIMEFMT_DASHES = (1 << 31),
/* helpers for reference */
TIMEFMT_TIMER_DEADLINE =
TIMEFMT_PRESELECT | TIMEFMT_MONOTONIC | TIMEFMT_UNTIL,
TIMEFMT_TIMER_INTERVAL = TIMEFMT_PRESELECT,
};
extern ssize_t printfrr_time(struct fbuf *buf, struct printfrr_eargs *ea,
const struct timespec *ts, unsigned int flags);
#ifdef __cplusplus
}
#endif
#endif /* _FRR_MONOTIME_H */
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