Added SET_INVALID, which set evaluators should now return instead of NULL

when the given value is not accepted. This to allow certain variables
actually be set to NULL (server, for example). This should fully close
#444.

1 files changed, 6 insertions, 2 deletions

diff --git a/set.h b/set.h
index 8c722877..8ca6f9ec 100644
--- a/set.h
+++ b/set.h
@@ -43,6 +43,10 @@ struct set;
 
 typedef char *(*set_eval) ( struct set *set, char *value );
 
+extern char *SET_INVALID;
+
+#define SET_NULL_OK        0x0100
+
 typedef struct set
 {
 	void *data;     /* Here you can save a pointer to the
@@ -60,8 +64,8 @@ typedef struct set
 	int flags;      /* See account.h, for example. set.c doesn't use
 	                   this (yet?). */
 	
-	/* Eval: Returns NULL if the value is incorrect or exactly the
-	   passed value variable. When returning a corrected value,
+	/* Eval: Returns SET_INVALID if the value is incorrect or exactly
+	   the passed value variable. When returning a corrected value,
 	   set_setstr() should be able to free() the returned string! */
 	set_eval eval;
 	struct set *next;