feat: implement WASM phase 1 DValue ABI

src/lib/dvalue.h

@@ -67,3 +67,32 @@ struct DValue {
 
 String to_String(DValue t);
 String var_dump(const DValue& map, String prefix = "", String postfix = "\n");
+
+String ucb_encode(const DValue& value);
+DValue ucb_decode(const String& encoded);
+bool ucb_decode(const String& encoded, DValue& out, String* error_out = 0);
+
+extern "C" {
+
+typedef struct DValue uce_dvalue;
+
+typedef struct uce_dv_iter
+{
+	size_t position;
+	size_t reserved[3];
+} uce_dv_iter;
+
+uce_dvalue* uce_dv_root(void);
+uce_dvalue* uce_dv_get(uce_dvalue* value, const char* key, size_t key_len);
+uce_dvalue* uce_dv_find(uce_dvalue* value, const char* key, size_t key_len);
+const char* uce_dv_value(uce_dvalue* value, size_t* len_out);
+void uce_dv_set_value(uce_dvalue* value, const char* bytes, size_t len);
+size_t uce_dv_count(uce_dvalue* value);
+int uce_dv_is_list(uce_dvalue* value);
+uce_dv_iter uce_dv_iter_begin(uce_dvalue* value);
+int uce_dv_iter_next(uce_dvalue* value, uce_dv_iter* iter, const char** key_out, size_t* key_len_out, uce_dvalue** child_out);
+size_t uce_dv_encode(uce_dvalue* value, char* buf, size_t cap);
+uce_dvalue* uce_dv_decode(const char* buf, size_t len);
+const char* uce_dv_last_error(void);
+
+}