add more files msgs

utils/CMakeLists.txt

@@ -0,0 +1,32 @@
+cmake_minimum_required(VERSION 3.10)
+
+# --- Project riêng cho utils ---
+project(utils LANGUAGES CXX)
+
+# --- Tạo INTERFACE library (header-only) ---
+add_library(utils INTERFACE)
+
+# --- Include directories ---
+target_include_directories(utils
+    INTERFACE
+        $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>   # build nội bộ
+        $<INSTALL_INTERFACE:include/utils>             # dùng khi install/export
+)
+
+# --- Cài đặt header files ---
+install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/
+        DESTINATION include/utils
+        FILES_MATCHING PATTERN "*.h"
+)
+
+# --- Cài đặt target INTERFACE để export ---
+install(TARGETS utils
+        EXPORT utils-targets
+)
+
+# --- Export target file ---
+install(EXPORT utils-targets
+        FILE utils-targets.cmake
+        NAMESPACE utils::
+        DESTINATION lib/cmake/utils
+)

utils/utils.h

@@ -0,0 +1,11 @@
+#ifndef UTILIS_MSGS_H
+#define UTILIS_MSGS_H
+#include <cmath>
+
+template <typename T>
+bool isEqual(const T& a, const T& b, double eps = 1e-5)
+{
+    return std::fabs(a - b) < eps;
+}
+
+#endif // UTILIS_MSGS_H