1#include <stdlib.h>
  2#include <string.h>
  3#include <sys/time.h>
  4#include <linux/time64.h>
  5#include <time.h>
  6#include <errno.h>
  7#include <inttypes.h>
  8
  9#include "perf.h"
 10#include "debug.h"
 11#include "time-utils.h"
 12
 13int parse_nsec_time(const char *str, u64 *ptime)
 14{
 15	u64 time_sec, time_nsec;
 16	char *end;
 17
 18	time_sec = strtoul(str, &end, 10);
 19	if (*end != '.' && *end != '\0')
 20		return -1;
 21
 22	if (*end == '.') {
 23		int i;
 24		char nsec_buf[10];
 25
 26		if (strlen(++end) > 9)
 27			return -1;
 28
 29		strncpy(nsec_buf, end, 9);
 30		nsec_buf[9] = '\0';
 31
 32		/* make it nsec precision */
 33		for (i = strlen(nsec_buf); i < 9; i++)
 34			nsec_buf[i] = '0';
 35
 36		time_nsec = strtoul(nsec_buf, &end, 10);
 37		if (*end != '\0')
 38			return -1;
 39	} else
 40		time_nsec = 0;
 41
 42	*ptime = time_sec * NSEC_PER_SEC + time_nsec;
 43	return 0;
 44}
 45
 46static int parse_timestr_sec_nsec(struct perf_time_interval *ptime,
 47				  char *start_str, char *end_str)
 48{
 49	if (start_str && (*start_str != '\0') &&
 50	    (parse_nsec_time(start_str, &ptime->start) != 0)) {
 51		return -1;
 52	}
 53
 54	if (end_str && (*end_str != '\0') &&
 55	    (parse_nsec_time(end_str, &ptime->end) != 0)) {
 56		return -1;
 57	}
 58
 59	return 0;
 60}
 61
 62int perf_time__parse_str(struct perf_time_interval *ptime, const char *ostr)
 63{
 64	char *start_str, *end_str;
 65	char *d, *str;
 66	int rc = 0;
 67
 68	if (ostr == NULL || *ostr == '\0')
 69		return 0;
 70
 71	/* copy original string because we need to modify it */
 72	str = strdup(ostr);
 73	if (str == NULL)
 74		return -ENOMEM;
 75
 76	ptime->start = 0;
 77	ptime->end = 0;
 78
 79	/* str has the format: <start>,<stop>
 80	 * variations: <start>,
 81	 *             ,<stop>
 82	 *             ,
 83	 */
 84	start_str = str;
 85	d = strchr(start_str, ',');
 86	if (d) {
 87		*d = '\0';
 88		++d;
 89	}
 90	end_str = d;
 91
 92	rc = parse_timestr_sec_nsec(ptime, start_str, end_str);
 93
 94	free(str);
 95
 96	/* make sure end time is after start time if it was given */
 97	if (rc == 0 && ptime->end && ptime->end < ptime->start)
 98		return -EINVAL;
 99
100	pr_debug("start time %" PRIu64 ", ", ptime->start);
101	pr_debug("end time %" PRIu64 "\n", ptime->end);
102
103	return rc;
104}
105
106bool perf_time__skip_sample(struct perf_time_interval *ptime, u64 timestamp)
107{
108	/* if time is not set don't drop sample */
109	if (timestamp == 0)
110		return false;
111
112	/* otherwise compare sample time to time window */
113	if ((ptime->start && timestamp < ptime->start) ||
114	    (ptime->end && timestamp > ptime->end)) {
115		return true;
116	}
117
118	return false;
119}