sys: timeutil: expose and use macro for base year

timeutil internally uses 1900 as base year for calculation, that is hidden from caller context. Thus declared a macro in the public header file, and uses that macro will let caller adjust the calulations accordingly. Signed-off-by: Anuj Pathak <[email protected]>
argentum-systems · Aug 29, 2024 · 836514c · 836514c
1 parent b90a507
commit 836514c
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diff --git a/include/zephyr/sys/timeutil.h b/include/zephyr/sys/timeutil.h
@@ -37,6 +37,9 @@ extern "C" {
  * @{
  */
 
+/* Base Year value use in calculations in "timeutil_timegm64" API */
+#define TIME_UTILS_BASE_YEAR 1900
+
 /**
  * @brief Convert broken-down time to a POSIX epoch offset in seconds.
  *

diff --git a/lib/utils/timeutil.c b/lib/utils/timeutil.c
@@ -44,7 +44,7 @@ static int64_t time_days_from_civil(int64_t y,
 
 int64_t timeutil_timegm64(const struct tm *tm)
 {
-	int64_t y = 1900 + (int64_t)tm->tm_year;
+	int64_t y = TIME_UTILS_BASE_YEAR + (int64_t)tm->tm_year;
 	unsigned int m = tm->tm_mon + 1;
 	unsigned int d = tm->tm_mday - 1;
 	int64_t ndays = time_days_from_civil(y, m, d);
-Original file line number
+Diff line change
@@ Expand Up / @@ -37,6 +37,9 @@ extern "C" { @@
      * @{
      */
+    /* Base Year value use in calculations in "timeutil_timegm64" API */
+    #define TIME_UTILS_BASE_YEAR 1900
     /**
      * @brief Convert broken-down time to a POSIX epoch offset in seconds.
      *
@@ Expand Down @@