1 files changed, 21 insertions, 0 deletions
diff --git a/src/libs6rc/s6rc_get_major.c b/src/libs6rc/s6rc_get_major.c
new file mode 100644
index 0000000..3bb9fb1
--- /dev/null
+++ b/src/libs6rc/s6rc_get_major.c
@@ -0,0 +1,21 @@
+/* ISC license. */
+
+#include <stdint.h>
+
+#include <skalibs/uint16.h>
+
+#include <s6-rc/s6rc-utils.h>
+
+uint32_t s6rc_get_major (char const *s)
+{
+  size_t len = 0, l ;
+  uint32_t acc = 0 ;
+  uint16_t u ;
+  l = uint16_scan(s + len, &u) ;
+  if (!l || s[len + l++] != '.') return 0 ;
+  len += l ; acc = acc << 16 | u ;
+  l = uint16_scan(s + len, &u) ;
+  if (!l || s[len + l++] != '.') return 0 ;
+  len += l ; acc = acc << 16 | u ;
+  return acc ;
+}