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, 3 insertions, 17 deletions

diff --git a/src/expr/exthdr.c b/src/expr/exthdr.c
index e5f714b..1b813b1 100644
--- a/src/expr/exthdr.c
+++ b/src/expr/exthdr.c
@@ -235,8 +235,9 @@ static inline int str2exthdr_type(const char *str)
 	return -1;
 }
 
-static int nftnl_expr_exthdr_snprintf_default(char *buf, size_t len,
-					      const struct nftnl_expr *e)
+static int
+nftnl_expr_exthdr_snprintf(char *buf, size_t len,
+			   uint32_t flags, const struct nftnl_expr *e)
 {
 	struct nftnl_expr_exthdr *exthdr = nftnl_expr_data(e);
 
@@ -253,21 +254,6 @@ static int nftnl_expr_exthdr_snprintf_default(char *buf, size_t len,
 
 }
 
-static int
-nftnl_expr_exthdr_snprintf(char *buf, size_t len, uint32_t type,
-			   uint32_t flags, const struct nftnl_expr *e)
-{
-	switch (type) {
-	case NFTNL_OUTPUT_DEFAULT:
-		return nftnl_expr_exthdr_snprintf_default(buf, len, e);
-	case NFTNL_OUTPUT_XML:
-	case NFTNL_OUTPUT_JSON:
-	default:
-		break;
-	}
-	return -1;
-}
-
 struct expr_ops expr_ops_exthdr = {
 	.name		= "exthdr",
 	.alloc_len	= sizeof(struct nftnl_expr_exthdr),