2 files changed, 24 insertions, 5 deletions

diff --git a/csv.c b/csv.c
index 6bd157c..0e6e897 100644
--- a/csv.c
+++ b/csv.c
@@ -5,6 +5,8 @@
 #include <stdlib.h>
 #include <string.h>
 
+// === Compiletimeoptions ===
+
 #ifndef CSV_DEFAULT_DELIMITER
 #       define CSV_DEFAULT_DELIMITER '"'
 #endif
@@ -13,7 +15,25 @@
 #       define CSV_DEFAULT_SEPARATOR ','
 #endif
 
-#if defined(__GNUC__) || defined(__clang__)
+// === some usefull Makros ===
+
+#define UNUSED(x) (void) (sizeof((x), 0)) // mark a parameter as 'unused'
+#define STR(s) #s                         // Stringify a Makro
+#define XSTR(s) STR(s)
+
+// === Version Information ===
+
+#define CSV_VER_MAJOR 1
+#define CSV_VER_MINOR 0
+#define CSV_VER_PATCH 0
+#define CSV_VER_APPENDIX "-dev"
+
+// version information as described at semver.org
+const char csv_version[] = XSTR(CSV_VER_MAJOR) "." XSTR(CSV_VER_MINOR) "." XSTR(CSV_VER_PATCH) CSV_VER_APPENDIX "\0" XSTR(__DATE__) "\0" XSTR(__TIME__);
+
+// === CSV-MEMORY Interface ===
+
+#if ( (defined(__GNUC__) && __GNUC__ >= 5) || (defined(__clang__) && (__clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 4))) )
 #       define mul_overflow __builtin_mul_overflow
 #else
 static inline int
@@ -24,10 +44,6 @@ mul_overflow(size_t a, size_t b, size_t *out)
 }
 #endif
 
-#define UNUSED(x) (void) (sizeof((x), 0))
-
-// === CSV-MEMORY Interface ===
-
 static void *
 csv_mem_allocate(size_t n, size_t sz, void *cb_arg)
 {
diff --git a/csv.h b/csv.h
index bbfe150..44c6ff3 100644
--- a/csv.h
+++ b/csv.h
@@ -46,6 +46,9 @@ typedef struct {
         csv_field_t          csv_field;
 } csv_t;
 
+/* version */
+extern const char csv_version[];
+
 /* initialization */
 void csv_init(csv_t *csv);
 void csv_init_opt(csv_t *csv, const csv_options_t *const csv_options);