Common Trace Format 2 generation

[lttng-tools.git] / src / common / time.hpp

diff --git a/src/common/time.hpp b/src/common/time.hpp
new file mode 100644 (file)
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--- /dev/null
+++ b/src/common/time.hpp
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ *
+ */
+
+#ifndef LTTNG_TIME_H
+#define LTTNG_TIME_H
+
+#include <time.h>
+#include <stdbool.h>
+#include <common/macros.hpp>
+#include <common/compat/time.hpp>
+
+#define MSEC_PER_SEC    1000ULL
+#define NSEC_PER_SEC    1000000000ULL
+#define NSEC_PER_MSEC   1000000ULL
+#define NSEC_PER_USEC   1000ULL
+#define USEC_PER_SEC    1000000ULL
+#define USEC_PER_MSEC   1000ULL
+
+#define SEC_PER_MINUTE  60ULL
+#define MINUTE_PER_HOUR 60ULL
+
+#define USEC_PER_MINUTE (USEC_PER_SEC * SEC_PER_MINUTE)
+#define USEC_PER_HOURS  (USEC_PER_MINUTE * MINUTE_PER_HOUR)
+
+#define ISO8601_STR_LEN sizeof("YYYYmmddTHHMMSS+HHMM")
+#define DATETIME_STR_LEN sizeof("YYYYmmdd-HHMMSS")
+
+bool locale_supports_utf8(void);
+
+#define NSEC_UNIT       "ns"
+#define USEC_UNIT       (locale_supports_utf8() ? "µs" : "us")
+#define MSEC_UNIT       "ms"
+#define SEC_UNIT        "s"
+#define MIN_UNIT        "m"
+#define HR_UNIT         "h"
+
+/*
+ * timespec_to_ms: Convert timespec to milliseconds.
+ *
+ * Returns 0 on success, else -1 on error. errno is set to EOVERFLOW if
+ * input would overflow the output in milliseconds.
+ */
+int timespec_to_ms(struct timespec ts, unsigned long *ms);
+
+/*
+ * timespec_abs_diff: Absolute difference between timespec.
+ */
+struct timespec timespec_abs_diff(struct timespec ts_a, struct timespec ts_b);
+
+/*
+ * Format a Unix timestamp to an ISO 8601 compatible timestamp of
+ * the form "YYYYmmddTHHMMSS+HHMM" in local time. `len` must >= to
+ * ISO8601_STR_LEN.
+ *
+ * Returns 0 on success, else -1 on error.
+ */
+int time_to_iso8601_str(time_t time, char *str, size_t len);
+
+int time_to_datetime_str(time_t time, char *str, size_t len);
+
+#endif /* LTTNG_TIME_H */