expr: Check output type once and for all

There is but a single supported output type left, so check it in expr.c
and drop all the single option switch statements in individual
expressions.

Since the parameter is now unused (and to ensure code correctness), drop
'type' parameter from struct expr_ops' snprintf callback.

Signed-off-by: Phil Sutter <phil@nwl.cc>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/expr_ops.h b/include/expr_ops.h
index 5237ac7..7a6aa23 100644
--- a/include/expr_ops.h
+++ b/include/expr_ops.h
@@ -18,7 +18,7 @@ struct expr_ops {
 	const void *(*get)(const struct nftnl_expr *e, uint16_t type, uint32_t *data_len);
 	int 	(*parse)(struct nftnl_expr *e, struct nlattr *attr);
 	void	(*build)(struct nlmsghdr *nlh, const struct nftnl_expr *e);
-	int	(*snprintf)(char *buf, size_t len, uint32_t type, uint32_t flags, const struct nftnl_expr *e);
+	int	(*snprintf)(char *buf, size_t len, uint32_t flags, const struct nftnl_expr *e);
 };
 
 struct expr_ops *nftnl_expr_ops_lookup(const char *name);