lib: add simple generic version helpers

Add some simple helpers for generic major+minor+sub version
values.

Signed-off-by: Mark Stapp <mjs@cisco.com>

2 files changed, 20 insertions, 0 deletions

diff --git a/lib/libfrr.c b/lib/libfrr.c
index c5c7e7837a..03025328b7 100644
--- a/lib/libfrr.c
+++ b/lib/libfrr.c
@@ -1450,3 +1450,12 @@ void _libfrr_version(void)
 	write(1, banner, sizeof(banner) - 1);
 	_exit(0);
 }
+
+/* Render simple version tuple to string */
+const char *frr_vers2str(uint32_t version, char *buf, int buflen)
+{
+	snprintf(buf, buflen, "%d.%d.%d", MAJOR_FRRVERSION(version),
+		 MINOR_FRRVERSION(version), SUB_FRRVERSION(version));
+
+	return buf;
+}
diff --git a/lib/libfrr.h b/lib/libfrr.h
index ee436d9f8f..77d70448a9 100644
--- a/lib/libfrr.h
+++ b/lib/libfrr.h
@@ -233,6 +233,17 @@ extern bool frr_is_after_fork;
 
 extern bool debug_memstats_at_exit;
 
+/*
+ * Version numbering: MAJOR (8) | MINOR (16) | SUB (8)
+ */
+#define MAKE_FRRVERSION(maj, min, sub)                                         \
+	((((maj) & 0xff) << 24) | (((min) & 0xffff) << 8) | ((sub) & 0xff))
+#define MAJOR_FRRVERSION(v) (((v) >> 24) & 0xff)
+#define MINOR_FRRVERSION(v) (((v) >> 8) & 0xffff)
+#define SUB_FRRVERSION(v)  ((v) & 0xff)
+
+const char *frr_vers2str(uint32_t version, char *buf, int buflen);
+
 #ifdef __cplusplus
 }
 #endif