Add libjson for JSON parsing & serialization

Author: maxdev1

applications/libjson/build.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+ROOT="../.."
+if [ -f "$ROOT/variables.sh" ]; then
+	. "$ROOT/variables.sh"
+fi
+. "$ROOT/ghost.sh"
+
+# Define build setup
+ARTIFACT_NAME="libjson.a"
+ARTIFACT_NAME_SHARED="libjson.so"
+
+# Include application build tasks
+. "../libraries.sh"

applications/libjson/inc/libjson/json.hpp

@@ -0,0 +1,46 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+*                                                                           *
+ *  Ghost, a micro-kernel based operating system for the x86 architecture    *
+ *  Copyright (C) 2025, Max Schlüssel <[email protected]>                     *
+ *                                                                           *
+ *  This program is free software: you can redistribute it and/or modify     *
+ *  it under the terms of the GNU General Public License as published by     *
+ *  the Free Software Foundation, either version 3 of the License, or        *
+ *  (at your option) any later version.                                      *
+ *                                                                           *
+ *  This program is distributed in the hope that 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/>.    *
+ *                                                                           *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#ifndef LIBJSON_JSON
+#define LIBJSON_JSON
+
+#include "./json_node.hpp"
+#include <string>
+
+class g_json
+{
+    const char* start = nullptr;
+    const char* source = nullptr;
+
+    void skipWhitespace();
+    bool consume(char c);
+
+    std::string parseString();
+    double parseNumber();
+    g_json_node parseValue();
+    g_json_node parseArray();
+    g_json_node parseObject();
+
+public:
+    g_json_node parse(const std::string& s);
+    std::string stringify(g_json_node& node);
+};
+
+#endif

applications/libjson/inc/libjson/json_node.hpp

@@ -0,0 +1,83 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+*                                                                           *
+ *  Ghost, a micro-kernel based operating system for the x86 architecture    *
+ *  Copyright (C) 2025, Max Schlüssel <[email protected]>                     *
+ *                                                                           *
+ *  This program is free software: you can redistribute it and/or modify     *
+ *  it under the terms of the GNU General Public License as published by     *
+ *  the Free Software Foundation, either version 3 of the License, or        *
+ *  (at your option) any later version.                                      *
+ *                                                                           *
+ *  This program is distributed in the hope that 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/>.    *
+ *                                                                           *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#ifndef LIBJSON_JSON_NODE
+#define LIBJSON_JSON_NODE
+
+#include <string>
+#include <variant>
+#include <vector>
+#include <map>
+
+struct g_json_node
+{
+    using object = std::map<std::string, g_json_node>;
+    using array = std::vector<g_json_node>;
+    using value = std::variant<std::nullptr_t, bool, double, std::string, array, object>;
+
+    value v{};
+
+    g_json_node() : v(nullptr)
+    {
+    }
+
+    g_json_node(std::nullptr_t) : v(nullptr)
+    {
+    }
+
+    g_json_node(bool b) : v(b)
+    {
+    }
+
+    g_json_node(double d) : v(d)
+    {
+    }
+
+    g_json_node(const char* s) : v(std::string(s))
+    {
+    }
+
+    g_json_node(std::string s) : v(std::move(s))
+    {
+    }
+
+    g_json_node(array a) : v(std::move(a))
+    {
+    }
+
+    g_json_node(object o) : v(std::move(o))
+    {
+    }
+
+    bool isObject() const { return std::holds_alternative<object>(v); }
+    bool isArray() const { return std::holds_alternative<array>(v); }
+    bool isString() const { return std::holds_alternative<std::string>(v); }
+    bool isNumber() const { return std::holds_alternative<double>(v); }
+    bool isBool() const { return std::holds_alternative<bool>(v); }
+    bool isNull() const { return std::holds_alternative<std::nullptr_t>(v); }
+
+    object& asObject() { return std::get<object>(v); }
+    array& asArray() { return std::get<array>(v); }
+    std::string& asString() { return std::get<std::string>(v); }
+    double& asNumber() { return std::get<double>(v); }
+    bool& asBool() { return std::get<bool>(v); }
+};
+
+#endif