common: implement stringification of selectors

common/include/ivy/selector.h

@@ -1,8 +1,8 @@
 #ifndef IVY_SELECTOR_H_
 #define IVY_SELECTOR_H_
 
-#include <ivy/status.h>
 #include <blue/core/queue.h>
+#include <ivy/status.h>
 
 enum ivy_selector_recipient {
 	IVY_SEL_NONE = 0,
@@ -27,8 +27,12 @@ IVY_API void ivy_selector_destroy(struct ivy_selector *sel);
 
 IVY_API void ivy_selector_set_recipient(
 	struct ivy_selector *sel, enum ivy_selector_recipient r);
-IVY_API enum ivy_status ivy_selector_set_name(struct ivy_selector *sel, const char *name);
+IVY_API enum ivy_status ivy_selector_set_name(
+	struct ivy_selector *sel, const char *name);
 IVY_API enum ivy_status ivy_selector_add_arg(
 	struct ivy_selector *sel, const char *label, const char *name);
 
+IVY_API size_t ivy_selector_to_string(
+	const struct ivy_selector *sel, char *out, size_t max);
+
 #endif

common/selector.c

@@ -1,6 +1,7 @@
-#include <ivy/selector.h>
 #include <blue/core/queue.h>
+#include <blue/core/stringstream.h>
 #include <blue/object/string.h>
+#include <ivy/selector.h>
 #include <stdlib.h>
 #include <string.h>
 
@@ -27,13 +28,14 @@ void ivy_selector_destroy(struct ivy_selector *sel)
 	b_queue_iterator it = {0};
 	b_queue_iterator_begin(&sel->sel_args, &it);
 	while (b_queue_iterator_is_valid(&it)) {
-		struct ivy_selector_arg *arg = b_unbox(struct ivy_selector_arg, it.entry, arg_entry);
+		struct ivy_selector_arg *arg
+			= b_unbox(struct ivy_selector_arg, it.entry, arg_entry);
 		b_queue_iterator_erase(&it);
 
 		if (arg->arg_label) {
 			free(arg->arg_label);
 		}
-		
+
 		if (arg->arg_name) {
 			free(arg->arg_name);
 		}
@@ -87,4 +89,43 @@ enum ivy_status ivy_selector_add_arg(
 
 	b_queue_push_back(&sel->sel_args, &arg->arg_entry);
 	return IVY_OK;
-}
+}
+
+size_t ivy_selector_to_string(const struct ivy_selector *sel, char *out, size_t max)
+{
+	b_stringstream str;
+	b_stringstream_begin(&str, out, max);
+
+	switch (sel->sel_recipient) {
+	case IVY_SEL_OBJECT:
+		b_stringstream_add(&str, "-");
+		break;
+	case IVY_SEL_CLASS:
+		b_stringstream_add(&str, "+");
+		break;
+	default:
+		break;
+	}
+
+	if (sel->sel_name) {
+		b_stringstream_add(&str, sel->sel_name);
+	}
+
+	if (sel->sel_name && !b_queue_empty(&sel->sel_args)) {
+		b_stringstream_add(&str, "(");
+	}
+
+	b_queue_iterator it;
+	b_queue_foreach (&it, &sel->sel_args) {
+		struct ivy_selector_arg *arg
+			= b_unbox(struct ivy_selector_arg, it.entry, arg_entry);
+		b_stringstream_addf(
+			&str, "%s:", arg->arg_label ? arg->arg_label : "_");
+	}
+
+	if (sel->sel_name && !b_queue_empty(&sel->sel_args)) {
+		b_stringstream_add(&str, ")");
+	}
+
+	return b_stringstream_get_length(&str);
+}