feat: fix: `fix.hpp` engine parser.

Signed-off-by: Amlal El Mahrouss <amlal@nekernel.org>

10 files changed, 112 insertions, 42 deletions

diff --git a/examples/equiv/equiv.cc b/examples/equiv/equiv.cc
index 664602e..1b7b042 100644
--- a/examples/equiv/equiv.cc
+++ b/examples/equiv/equiv.cc
@@ -5,6 +5,7 @@
  */
 
 #include <lib/equiv.hpp>
+#include <lib/fix.hpp>
 #include <iostream>
 
 /* finally test it */
diff --git a/examples/fix/CMakeLists.txt b/examples/fix/CMakeLists.txt
new file mode 100644
index 0000000..db8921b
--- /dev/null
+++ b/examples/fix/CMakeLists.txt
@@ -0,0 +1,12 @@
+
+cmake_minimum_required(VERSION 3.15...3.31)
+
+project(
+  Fix
+  VERSION 1.0
+  LANGUAGES CXX)
+
+add_executable(Fix fix.cc)
+
+set_property(TARGET Fix PROPERTY CXX_STANDARD 20)
+target_include_directories(Fix PUBLIC ../../)
diff --git a/examples/fix/fix.cc b/examples/fix/fix.cc
new file mode 100644
index 0000000..1ab258e
--- /dev/null
+++ b/examples/fix/fix.cc
@@ -0,0 +1,25 @@
+/* 
+  string checksum example
+  written by Amlal El Mahrouss.
+  licensed under the MIT license
+ */
+
+#include <lib/fix.hpp>
+#include <iostream>
+
+/* finally test it */
+int main(int argc, char** argv)
+{
+	snu::fix::fix_visitor visitor;
+	auto				  fix = visitor.visit("8=FIX.4.2|9=65|35=A|49=SERVER|56=CLIENT|34=177|52=20090107-18:15:16|98=0|108=30|10=062|");
+
+	std::cout << "magic: " << fix.msg_magic_ << std::endl;
+
+	for (auto fields : fix.msg_body_)
+	{
+		std::cout << "key: " << fields.first;
+		std::cout << ",value: " << fields.second << std::endl;
+	}
+
+	return 0;
+}
diff --git a/lib/cgi.hpp b/lib/cgi.hpp
index 86fc6f9..e171eed 100644
--- a/lib/cgi.hpp
+++ b/lib/cgi.hpp
@@ -4,8 +4,8 @@
  * Copyright 2023-2025, Amlal El Mahrouss all rights reserved.
  */
 
-#ifndef _STDX_CGI_HPP
-#define _STDX_CGI_HPP
+#ifndef _SNU_CGI_HPP
+#define _SNU_CGI_HPP
 
 #include <cstdio>
 #include <string>
@@ -59,4 +59,4 @@ namespace snu
 	} // namespace web
 } // namespace snu
 
-#endif // ifndef _STDX_CGI_HPP
\ No newline at end of file
+#endif // ifndef _SNU_CGI_HPP
\ No newline at end of file
diff --git a/lib/crc32.hpp b/lib/crc32.hpp
index 726626e..bbdb15c 100644
--- a/lib/crc32.hpp
+++ b/lib/crc32.hpp
@@ -5,8 +5,8 @@
  * Copyright 2025, Amlal El Mahrouss all rights reserved.
  */
 
-#ifndef _STDX_CRC32_HPP
-#define _STDX_CRC32_HPP
+#ifndef _SNU_CRC32_HPP
+#define _SNU_CRC32_HPP
 
 #include <cstdint>
 #include <cstddef>
@@ -71,4 +71,4 @@ namespace snu
 	} // namespace details
 } // namespace snu
 
-#endif // !_STDX_CRC32_HPP
\ No newline at end of file
+#endif // !_SNU_CRC32_HPP
\ No newline at end of file
diff --git a/lib/embdfs.hpp b/lib/embdfs.hpp
index af6118a..9ec82d4 100644
--- a/lib/embdfs.hpp
+++ b/lib/embdfs.hpp
@@ -5,8 +5,8 @@
  * Copyright 2025, Amlal El Mahrouss all rights reserved.
  */
 
-#ifndef _STDX_EMBDFS_HPP
-#define _STDX_EMBDFS_HPP
+#ifndef _SNU_EMBDFS_HPP
+#define _SNU_EMBDFS_HPP
 
 #include <cstdint>
 #include <cstddef>
@@ -74,4 +74,4 @@ namespace snu::embdfs
 	} // namespace details
 } // namespace snu::embdfs
 
-#endif // ifndef _STDX_EMBDFS_HPP
\ No newline at end of file
+#endif // ifndef _SNU_EMBDFS_HPP
\ No newline at end of file
diff --git a/lib/equiv.hpp b/lib/equiv.hpp
index 15512f4..14fe280 100644
--- a/lib/equiv.hpp
+++ b/lib/equiv.hpp
@@ -1,8 +1,8 @@
 /*
  * File: equiv.hpp
- * Purpose: equivalence runtime c++ header.
+ * Purpose: Equivalence runtime c++ header.
  * Author: Amlal El Mahrouss (founder@snu.systems)
- * Copyright 2025, Amlal El Mahrouss all rights reserved.
+ * Copyright 2025, Amlal El Mahrouss and SNU Systems Corp all rights reserved.
  */
 
 #pragma once
diff --git a/lib/fix.hpp b/lib/fix.hpp
index c458b18..4620ad0 100644
--- a/lib/fix.hpp
+++ b/lib/fix.hpp
@@ -2,23 +2,23 @@
  * File: fix.hpp
  * Purpose: Financial Information Protocol implementation in C++.
  * Author: Amlal El Mahrouss (founder@snu.systems)
- * Copyright 2025, Amlal El Mahrouss all rights reserved.
+ * Copyright 2025, Amlal El Mahrouss and SNU Systems Corp all rights reserved.
  */
 
-#ifndef _STDX_FIX_HPP
-#define _STDX_FIX_HPP
+#ifndef _SNU_FIX_HPP
+#define _SNU_FIX_HPP
 
 #include <cstdint>
 #include <cstddef>
 #include <cassert>
+#include <utility>
+#include <vector>
 #include <string>
 #include <arpa/inet.h>
 #include <sys/socket.h>
 
 namespace snu::fix
 {
-	struct fix_reader;
-	struct fix_writer;
 	struct fix_visitor;
 	struct fix_range;
 	struct fix_range_data;
@@ -43,26 +43,58 @@ namespace snu::fix
 
 	class fix_range_data final
 	{
-	private:
-		friend fix_visitor;
-
-		std::string begin_string_;
-		size_t		body_len_;
-		uint16_t	msg_type_;
-		uint32_t	msg_seq_num_;
-		uint32_t	sender_comp_id_;
-		uint32_t	target_comp_id_;
-		std::string send_time_;
-		std::string ci_ord_id_;
-		uint16_t	side_;
-		uint16_t	security_type_;
-		std::string symbol_;
-		uint32_t	order_qty_;
-		uint16_t	order_type_;
-		uint64_t	price_;
-		uint64_t	time_in_force_;
-		uint32_t	checksum_;
+	public:
+		std::string										 msg_magic_;
+		std::size_t										 msg_body_len_;
+		std::vector<std::pair<std::string, std::string>> msg_body_;
+	};
+
+	class fix_visitor final
+	{
+	public:
+		static constexpr auto soh  = '|';
+		static constexpr auto base = 10U;
+
+		fix_range_data visit(const std::string& in)
+		{
+			fix_range_data ret{};
+
+			std::string in_tmp;
+
+			try
+			{
+				for (auto& ch : in)
+				{
+					if (ch != soh)
+					{
+						in_tmp += ch;
+						continue;
+					}
+
+					auto key = in_tmp.substr(0, in_tmp.find("="));
+					auto val = in_tmp.substr(in_tmp.find("=") + 1);
+
+					if (ret.msg_magic_.empty())
+					{
+						ret.msg_magic_ = val;
+					}
+					else
+					{
+						ret.msg_body_.emplace_back(std::make_pair(key, val));
+						ret.msg_body_len_ += in_tmp.size();
+					}
+
+					in_tmp.clear();
+				}
+			}
+			catch (...)
+			{
+				return {};
+			}
+
+			return ret;
+		}
 	};
 } // namespace snu::fix
 
-#endif // ifndef _STDX_FIX_HPP
+#endif // ifndef _SNU_FIX_HPP
diff --git a/lib/io/print.hpp b/lib/io/print.hpp
index c8c21e8..0a5b5e2 100644
--- a/lib/io/print.hpp
+++ b/lib/io/print.hpp
@@ -5,8 +5,8 @@
  * Copyright 2025, SNU Systems Corp all rights reserved.
  */
 
-#ifndef _STDX_PRINT_HPP
-#define _STDX_PRINT_HPP
+#ifndef _SNU_PRINT_HPP
+#define _SNU_PRINT_HPP
 
 #include <iostream>
 
@@ -26,4 +26,4 @@ namespace snu
 	}
 } // namespace snu
 
-#endif // ifndef _STDX_PRINT_HPP
\ No newline at end of file
+#endif // ifndef _SNU_PRINT_HPP
\ No newline at end of file
diff --git a/lib/opt.hpp b/lib/opt.hpp
index 2c9405d..1145f19 100644
--- a/lib/opt.hpp
+++ b/lib/opt.hpp
@@ -4,8 +4,8 @@
  * Copyright 2023-2025, Amlal El Mahrouss/SNU Systems Corp all rights reserved.
  */
 
-#ifndef _STDX_OPT_HPP
-#define _STDX_OPT_HPP
+#ifndef _SNU_OPT_HPP
+#define _SNU_OPT_HPP
 
 #include <stdexcept>
 #include <utility>
@@ -108,4 +108,4 @@ namespace snu
 
 } /* namespace snu */
 
-#endif /* ifndef _STDX_OPT_HPP */
+#endif /* ifndef _SNU_OPT_HPP */