datatype: Describe rt symbol tables

Implement a symbol_table_print() wrapper for the run-time populated
rt_symbol_tables which formats output similar to expr_describe() and
includes the data source.

Since these tables reside in struct output_ctx there is no implicit
connection between data type and therefore providing callbacks for
relevant datat types which feed the data into said wrapper is a simpler
solution than extending expr_describe() itself.

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

1 files changed, 7 insertions, 0 deletions

diff --git a/src/rt.c b/src/rt.c
index 3ee710dd..d8f3352f 100644
--- a/src/rt.c
+++ b/src/rt.c
@@ -45,10 +45,17 @@ static struct error_record *realm_type_parse(struct parse_ctx *ctx,
 	return symbolic_constant_parse(ctx, sym, ctx->tbl->realm, res);
 }
 
+static void realm_type_describe(struct output_ctx *octx)
+{
+	rt_symbol_table_describe(octx, "rt_realms",
+				 octx->tbl.realm, &realm_type);
+}
+
 const struct datatype realm_type = {
 	.type		= TYPE_REALM,
 	.name		= "realm",
 	.desc		= "routing realm",
+	.describe	= realm_type_describe,
 	.byteorder	= BYTEORDER_HOST_ENDIAN,
 	.size		= 4 * BITS_PER_BYTE,
 	.basetype	= &integer_type,