1 files changed, 17 insertions, 0 deletions
diff --git a/src/libstddjb/ltm64_from_localtm.c b/src/libstddjb/ltm64_from_localtm.c
new file mode 100644
index 0000000..6169f04
--- /dev/null
+++ b/src/libstddjb/ltm64_from_localtm.c
@@ -0,0 +1,17 @@
+/* ISC license. */
+
+#include <sys/types.h>
+#include <errno.h>
+#include <time.h>
+#include <skalibs/tai.h>
+#include <skalibs/uint64.h>
+#include <skalibs/djbtime.h>
+
+int ltm64_from_localtm (uint64 *uu, struct tm const *l)
+{
+  struct tm ll = *l ;
+  time_t u = mktime(&ll) ;
+  if (u == (time_t)-1) return (errno = EINVAL, 0) ;
+  *uu = TAI_MAGIC + u ;
+  return 1 ;
+}