- add a "default" function

1 files changed, 50 insertions, 0 deletions

diff --git a/src/format.c b/src/format.c
index 2d18da7..aed71f1 100644
--- a/src/format.c
+++ b/src/format.c
@@ -2703,6 +2703,55 @@ format_ifeq(struct plugin_state *state, Slapi_PBlock *pb, Slapi_Entry *e,
 	return ret;
 }
 
+/* If the expression given as the first argument returns any values, return
+ * them.  Otherwise, return the second expression. */
+static int
+format_default(struct plugin_state *state, Slapi_PBlock *pb, Slapi_Entry *e,
+	       const char *group, const char *set,
+	       const char *args, const char *disallowed,
+	       char *outbuf, int outbuf_len,
+	       struct format_choice **outbuf_choices,
+	       char ***rel_attrs, char ***ref_attrs,
+	       struct format_inref_attr ***inref_attrs,
+	       struct format_ref_attr_list ***ref_attr_list,
+	       struct format_ref_attr_list ***inref_attr_list)
+{
+	int ret, argc, i;
+	unsigned int *lengths;
+	char **argv, **values;
+	bool_t first;
+	struct berval bv, **choices;
+
+	ret = format_parse_args(state, args, &argc, &argv);
+	if (ret != 0) {
+		slapi_log_error(SLAPI_LOG_PLUGIN, state->plugin_desc->spd_id,
+				"default: error parsing arguments\n");
+		return -EINVAL;
+	}
+	if (argc < 2) {
+		slapi_log_error(SLAPI_LOG_PLUGIN, state->plugin_desc->spd_id,
+				"default: expected at least two arguments "
+				"(got %d)\n",
+				argc);
+		format_free_parsed_args(argv);
+		return -EINVAL;
+	}
+	/* Evaluate expressions until we run out of them or succeed. */
+	for (i = 0; i < argc; i++) {
+		ret = format_expand(state, pb, e, group, set,
+				    argv[i], disallowed,
+				    outbuf, outbuf_len,
+				    outbuf_choices,
+				    rel_attrs, ref_attrs, inref_attrs,
+				    ref_attr_list, inref_attr_list);
+		if (ret >= 0) {
+			break;
+		}
+	}
+	format_free_parsed_args(argv);
+	return ret;
+}
+
 /* Evaluate all of the arguments, and concatentate all of the lists of results
  * to produce one long list. */
 static int
@@ -3200,6 +3249,7 @@ format_lookup_fn(const char *fnname)
 		{"mregsub", format_mregsub},
 		{"mregsubi", format_mregsubi},
 		{"ifeq", format_ifeq},
+		{"default", format_default},
 		{"collect", format_collect},
 		{"link", format_link},
 		{"unique", format_unique},