1 files changed, 186 insertions, 0 deletions
diff --git a/wsutil/nstime.h b/wsutil/nstime.h
new file mode 100644
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--- /dev/null
+++ b/wsutil/nstime.h
@@ -0,0 +1,186 @@
+/* nstime.h
+ * Definition of data structure to hold time values with nanosecond resolution
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef __NSTIME_H__
+#define __NSTIME_H__
+
+#include <wireshark.h>
+#include <time.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/** @file
+ * Definition of data structure to hold time values with nanosecond resolution
+ */
+
+/** data structure to hold time values with nanosecond resolution*/
+typedef struct {
+	time_t	secs;
+	int	nsecs;
+} nstime_t;
+
+/* Macros that expand to nstime_t initializers */
+
+/* Initialize to zero */
+#define NSTIME_INIT_ZERO {0, 0}
+
+/* Initialize to unset */
+#define NSTIME_INIT_UNSET {0, INT_MAX}
+
+/* Initialize to a specified number of seconds and nanoseconds */
+#define NSTIME_INIT_SECS_NSECS(secs, nsecs)	{secs, nsecs}
+
+/* Initialize to a specified number of seconds and microseconds */
+#define NSTIME_INIT_SECS_USECS(secs, usecs)	{secs, usecs*1000}
+
+/* Initialize to a specified number of seconds and milliseconds */
+#define NSTIME_INIT_SECS_MSECS(secs, msecs)	{secs, msecs*1000000}
+
+/* Initialize to a specified number of seconds */
+#define NSTIME_INIT_SECS(secs)			{secs, 0}
+
+/* Initialize to the maximum possible value */
+#define NSTIME_INIT_MAX	{sizeof(time_t) > sizeof(int) ? LONG_MAX : INT_MAX, INT_MAX}
+
+/* functions */
+
+/** set the given nstime_t to zero */
+WS_DLL_PUBLIC void nstime_set_zero(nstime_t *nstime);
+
+/** is the given nstime_t currently zero? */
+WS_DLL_PUBLIC bool nstime_is_zero(const nstime_t *nstime);
+
+/** set the given nstime_t to (0,maxint) to mark it as "unset"
+ * That way we can find the first frame even when a timestamp
+ * is zero (fix for bug 1056)
+ */
+WS_DLL_PUBLIC void nstime_set_unset(nstime_t *nstime);
+
+/* is the given nstime_t currently (0,maxint)? */
+WS_DLL_PUBLIC bool nstime_is_unset(const nstime_t *nstime);
+
+/** duplicate the current time
+ *
+ * a = b
+ */
+WS_DLL_PUBLIC void nstime_copy(nstime_t *a, const nstime_t *b);
+
+/** calculate the delta between two times (can be negative!)
+ *
+ * delta = b-a
+ *
+ * Note that it is acceptable for two or more of the arguments to point at the
+ * same structure.
+ */
+WS_DLL_PUBLIC void nstime_delta(nstime_t *delta, const nstime_t *b, const nstime_t *a );
+
+/** calculate the sum of two times
+ *
+ * sum = a+b
+ *
+ * Note that it is acceptable for two or more of the arguments to point at the
+ * same structure.
+ */
+WS_DLL_PUBLIC void nstime_sum(nstime_t *sum, const nstime_t *a, const nstime_t *b );
+
+/** sum += a */
+#define nstime_add(sum, a) nstime_sum(sum, sum, a)
+
+/** sum -= a */
+#define nstime_subtract(sum, a) nstime_delta(sum, sum, a)
+
+/** compare two times are return a value similar to memcmp() or strcmp().
+ *
+ * a > b : > 0
+ * a = b : 0
+ * a < b : < 0
+ */
+WS_DLL_PUBLIC int nstime_cmp (const nstime_t *a, const nstime_t *b );
+
+WS_DLL_PUBLIC unsigned nstime_hash(const nstime_t *nstime);
+
+/** converts nstime to double, time base is milli seconds */
+WS_DLL_PUBLIC double nstime_to_msec(const nstime_t *nstime);
+
+/** converts nstime to double, time base is seconds */
+WS_DLL_PUBLIC double nstime_to_sec(const nstime_t *nstime);
+
+/** converts Windows FILETIME to nstime, returns true on success,
+    false on failure */
+WS_DLL_PUBLIC bool filetime_to_nstime(nstime_t *nstime, uint64_t filetime);
+
+/** converts time like Windows FILETIME, but expressed in nanoseconds
+    rather than tenths of microseconds, to nstime, returns true on success,
+    false on failure */
+WS_DLL_PUBLIC bool nsfiletime_to_nstime(nstime_t *nstime, uint64_t nsfiletime);
+
+typedef enum {
+    ISO8601_DATETIME,       /** e.g. 2014-07-04T12:34:56.789+00:00 */
+    ISO8601_DATETIME_BASIC, /** ISO8601 Basic format, i.e. no - : separators */
+    ISO8601_DATETIME_AUTO,  /** Autodetect the presence of separators */
+} iso8601_fmt_e;
+
+/** parse an ISO 8601 format datetime string to nstime, returns pointer
+    to the first character after the last character, NULL on failure
+    Note that nstime is set to unset in the case of failure */
+WS_DLL_PUBLIC const char * iso8601_to_nstime(nstime_t *nstime, const char *ptr, iso8601_fmt_e format);
+
+/** parse an Unix epoch timestamp format datetime string to nstime, returns
+    pointer to the first character after the last character, NULL on failure
+    Note that nstime is set to unset in the case of failure */
+WS_DLL_PUBLIC const char * unix_epoch_to_nstime(nstime_t *nstime, const char *ptr);
+
+#define NSTIME_ISO8601_BUFSIZE  sizeof("YYYY-MM-DDTHH:MM:SS.123456789Z")
+
+WS_DLL_PUBLIC size_t nstime_to_iso8601(char *buf, size_t buf_size, const nstime_t *nstime);
+
+/* 64 bit signed number plus nanosecond fractional part */
+#define NSTIME_UNIX_BUFSIZE  (20+10+1)
+
+WS_DLL_PUBLIC void nstime_to_unix(char *buf, size_t buf_size, const nstime_t *nstime);
+
+/*
+ * Timestamp precision values.
+ *
+ * The value is the number of digits of precision after the integral part.
+ */
+typedef enum {
+    WS_TSPREC_SEC      = 0,
+    WS_TSPREC_100_MSEC = 1,
+    WS_TSPREC_10_MSEC  = 2,
+    WS_TSPREC_MSEC     = 3,
+    WS_TSPREC_100_USEC = 4,
+    WS_TSPREC_10_USEC  = 5,
+    WS_TSPREC_USEC     = 6,
+    WS_TSPREC_100_NSEC = 7,
+    WS_TSPREC_10_NSEC  = 8,
+    WS_TSPREC_NSEC     = 9
+} ws_tsprec_e;
+
+/*
+ * Maximum time stamp precision supported.
+ * Note that going beyond nanosecond precision would require expanding
+ * the fractional part of an nstime_t to 64 bits, and changing code
+ * that currently only handles second to nanosecond precision.
+ */
+#define WS_TSPREC_MAX 9
+
+/*
+ * Total number of valid precision values.
+ */
+#define NUM_WS_TSPREC_VALS (WS_TSPREC_MAX + 1)
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __NSTIME_H__  */