Start of another _Generic macro to fill in value boxes from C vars

diff --git a/src/include/value.h b/src/include/value.h
index 82eeea37c9118950162e2bf889e81f61b2f79593..4c9d9ecda31355c3f4cf6a4c5ebd2afc91b05448 100644 (file)
--- a/src/include/value.h
+++ b/src/include/value.h
@@ -201,6 +201,41 @@ struct value_box {
 #define fr_box_timeval(_val)                   _fr_box(FR_TYPE_TIMEVAL, .vb_timeval, _val)
 /* @} **/
 
+/** Automagically fill in a box, determining the value type from the type of the C variable
+ *
+ * Simplify boxing for simple C types using the _Generic macro to emit code that
+ * fills in the value box based on the type of _var provided.
+ *
+ * @note Will not set the box value to tainted.  You should do this manually if required.
+ *
+ * @note Will not work for all box types.  Will default to the 'simpler' box type, if the mapping
+ *      between C type and box type is ambiguous.
+ *
+ * @param[in] _box to fill.
+ * @param[in] _field to take value from.
+ */
+#define fr_box_from_cvar_shallow(_box, _var)
+_Generic((_var), \
+       char *          : fr_value_box_strdup_shallow(_box, NULL, _var, false), \
+       char const *    : fr_value_box_strdup_shallow(_box, NULL, _var, false), \
+       uint8_t *       : , \
+       uint8_t const * : , \
+       fr_ipaddr_t     : , \
+       fr_ipaddr_t *   : , \
+       uint8_t         : , \
+       uint16_t        : , \
+       uint32_t        : , \
+       uint64_t        : , \
+       uint128_t       : , \
+       int8_t          : , \
+       int16_t         : , \
+       int32_t         : , \
+       int64_t         : , \
+       float           : , \
+       double          : , \
+       size_t          : , \
+       struct timeval  :
+)
 /*
  *     Allocation
  */