htc: implement service channel parsing (ReceiveReadyPacket)

libraries/libstratosphere/source/htclow/ctrl/htclow_json.hpp

@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+#include <stratosphere.hpp>
+
+namespace ams::htclow::ctrl {
+
+    class JsonHandler : public rapidjson::BaseReaderHandler<rapidjson::UTF8<char>, JsonHandler>{
+        private:
+            enum class State {
+                Begin                     = 0,
+                ParseObject               = 1,
+                ParseServiceChannels      = 2,
+                ParseServiceChannelsArray = 3,
+                ParseProtocolVersion      = 4,
+                End                       = 5,
+            };
+        private:
+            State m_state;
+            s16 *m_version;
+            const char **m_strings;
+            int *m_num_strings;
+            int m_max_strings;
+        public:
+            JsonHandler(s16 *vers, const char **str, int *ns, int max) : m_state(State::Begin), m_version(vers), m_strings(str), m_num_strings(ns), m_max_strings(max) { /* ... */ }
+
+            bool Key(const Ch *str, rapidjson::SizeType len, bool copy);
+            bool Uint(unsigned);
+            bool String(const Ch *, rapidjson::SizeType, bool);
+
+            bool StartObject();
+            bool EndObject(rapidjson::SizeType);
+            bool StartArray();
+            bool EndArray(rapidjson::SizeType);
+    };
+
+}