1 files changed, 34 insertions, 0 deletions
diff --git a/src/libstddjb/leapsecs_init.c b/src/libstddjb/leapsecs_init.c
new file mode 100644
index 0000000..41f9b89
--- /dev/null
+++ b/src/libstddjb/leapsecs_init.c
@@ -0,0 +1,34 @@
+/* ISC license. */
+
+#include <errno.h>
+#include <skalibs/uint64.h>
+#include <skalibs/djbunix.h>
+#include "djbtime-internal.h"
+
+static unsigned int leapsecs_len (uint64 const *data)
+{
+  register unsigned int i = 1 ;
+  while (data[i]) i++ ;
+  return i ;
+}
+
+static int leapsecs_read (char const *file, uint64 *data)
+{
+  char s[LEAPSECS_MAX * sizeof(uint64)] ;
+  register int n = openreadnclose(file, s, LEAPSECS_MAX * sizeof(uint64)) ;
+  if (n < 0) return -1 ;
+  if (n % sizeof(uint64)) return (errno = EINVAL, -1) ;
+  n /= sizeof(uint64) ;
+  {
+    register unsigned int i = 0 ;
+    for (; i < (unsigned int)n ; i++)
+      uint64_unpack_big(s + i * sizeof(uint64), data + i) ;
+  }
+  data[n] = 0 ;
+  return n ;
+}
+
+int leapsecs_init_r (char const *file, uint64 *data)
+{
+  return data[0] ? (int)leapsecs_len(data) : leapsecs_read(file, data) ;
+}