build-sys: add version tooling

Add SLIRP_CHECK_VERSION() macro, and slirp_version_string() helpers.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>

4 files changed, 41 insertions, 0 deletions

diff --git a/src/libslirp-version.h.in b/src/libslirp-version.h.in
new file mode 100644
index 0000000..59f7a46
--- /dev/null
+++ b/src/libslirp-version.h.in
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+#ifndef LIBSLIRP_VERSION_H_
+#define LIBSLIRP_VERSION_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define SLIRP_MAJOR_VERSION @SLIRP_MAJOR_VERSION@
+#define SLIRP_MINOR_VERSION @SLIRP_MINOR_VERSION@
+#define SLIRP_MICRO_VERSION @SLIRP_MICRO_VERSION@
+
+#define SLIRP_CHECK_VERSION(major,minor,micro)                          \
+    (SLIRP_MAJOR_VERSION > (major) ||                                   \
+     (SLIRP_MAJOR_VERSION == (major) && SLIRP_MINOR_VERSION > (minor)) || \
+     (SLIRP_MAJOR_VERSION == (major) && SLIRP_MINOR_VERSION == (minor) && \
+      SLIRP_MICRO_VERSION >= (micro)))
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* LIBSLIRP_VERSION_H_ */
diff --git a/src/libslirp.h b/src/libslirp.h
index bcd2974..9b2f611 100644
--- a/src/libslirp.h
+++ b/src/libslirp.h
@@ -14,6 +14,8 @@
 #include <arpa/inet.h>
 #endif
 
+#include "libslirp-version.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -108,6 +110,8 @@ int slirp_state_load(Slirp *s, int version_id, SlirpReadCb read_cb,
 
 int slirp_state_version(void);
 
+const char *slirp_version_string(void);
+
 #ifdef __cplusplus
 } /* extern "C" */
 #endif
diff --git a/src/util.h b/src/util.h
index 1ef08ae..0d59559 100644
--- a/src/util.h
+++ b/src/util.h
@@ -72,6 +72,9 @@ struct iovec {
 #include <sys/uio.h>
 #endif
 
+#define stringify(s) tostring(s)
+#define tostring(s) #s
+
 #define SCALE_MS 1000000
 
 #define ETH_ALEN 6
diff --git a/src/version.c b/src/version.c
new file mode 100644
index 0000000..a837323
--- /dev/null
+++ b/src/version.c
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+#include "libslirp.h"
+#include "util.h"
+
+const char *
+slirp_version_string(void)
+{
+    return stringify(SLIRP_MAJOR_VERSION) "."
+        stringify(SLIRP_MINOR_VERSION) "."
+        stringify(SLIRP_MICRO_VERSION);
+}