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, 2 insertions, 17 deletions

diff --git a/src/expr/meta.c b/src/expr/meta.c
index 6ed8ee5..34fbb9b 100644
--- a/src/expr/meta.c
+++ b/src/expr/meta.c
@@ -192,8 +192,8 @@ static inline int str2meta_key(const char *str)
 }
 
 static int
-nftnl_expr_meta_snprintf_default(char *buf, size_t len,
-				 const struct nftnl_expr *e)
+nftnl_expr_meta_snprintf(char *buf, size_t len,
+			 uint32_t flags, const struct nftnl_expr *e)
 {
 	struct nftnl_expr_meta *meta = nftnl_expr_data(e);
 
@@ -208,21 +208,6 @@ nftnl_expr_meta_snprintf_default(char *buf, size_t len,
 	return 0;
 }
 
-static int
-nftnl_expr_meta_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_meta_snprintf_default(buf, len, e);
-	case NFTNL_OUTPUT_XML:
-	case NFTNL_OUTPUT_JSON:
-	default:
-		break;
-	}
-	return -1;
-}
-
 struct expr_ops expr_ops_meta = {
 	.name		= "meta",
 	.alloc_len	= sizeof(struct nftnl_expr_meta),