From cc51c8f47e21e6f13ea5ee21934719f16a37a180 Mon Sep 17 00:00:00 2001
From: Sebastian Reimers <hallo@studio-link.de>
Date: Wed, 7 Feb 2024 13:24:41 +0100
Subject: [PATCH] fmt/time: add fmt_timestamp_us

---
 include/re_fmt.h |  1 +
 src/fmt/time.c   | 40 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+)

diff --git a/include/re_fmt.h b/include/re_fmt.h
index 245e10218..630f98f50 100644
--- a/include/re_fmt.h
+++ b/include/re_fmt.h
@@ -181,6 +181,7 @@ static inline bool str_isset(const char *s)
 /* time */
 int  fmt_gmtime(struct re_printf *pf, void *ts);
 int  fmt_timestamp(struct re_printf *pf, void *ts);
+int fmt_timestamp_us(struct re_printf *pf, void *arg);
 int  fmt_human_time(struct re_printf *pf, const uint32_t *seconds);
 
 
diff --git a/src/fmt/time.c b/src/fmt/time.c
index a0001fd89..758cd7b97 100644
--- a/src/fmt/time.c
+++ b/src/fmt/time.c
@@ -129,3 +129,43 @@ int fmt_timestamp(struct re_printf *pf, void *arg)
 
 	return re_hprintf(pf, "%02u:%02u:%02u.%03llu", h, m, s, ms);
 }
+
+
+/**
+ * Print local time stamp including microseconds relative to user's timezone
+ *
+ * @param pf  Print function for output
+ * @param arg Not used
+ *
+ * @return 0 if success, otherwise errorcode
+ */
+int fmt_timestamp_us(struct re_printf *pf, void *arg)
+{
+	int h, m, s;
+	uint64_t us;
+#ifdef WIN32
+	SYSTEMTIME st;
+
+	GetSystemTime(&st);
+
+	h  = st.wHour;
+	m  = st.wMinute;
+	s  = st.wSecond;
+	us = st.wMilliseconds;
+#else
+	struct timespec tspec;
+	struct tm tm;
+
+	(void)clock_gettime(CLOCK_REALTIME, &tspec);
+	if (!localtime_r(&tspec.tv_sec, &tm))
+		return EINVAL;
+
+	h  = tm.tm_hour;
+	m  = tm.tm_min;
+	s  = tm.tm_sec;
+	us = tspec.tv_nsec / 1000;
+#endif
+	(void)arg;
+
+	return re_hprintf(pf, "%02u:%02u:%02u.%06llu", h, m, s, us);
+}