fix

Feature/hud

examples/CMakeLists.txt

@@ -2,6 +2,7 @@ add_subdirectory(example_barycentric)
 add_subdirectory(example_glfw3)
 add_subdirectory(example_proj_mat_builder)
 add_subdirectory(example_signature_scan)
+add_subdirectory(example_hud)
 
 if(OMATH_ENABLE_VALGRIND)
     omath_setup_valgrind(example_projection_matrix_builder)

examples/example_hud/CMakeLists.txt

@@ -0,0 +1,16 @@
+project(example_hud)
+
+
+add_executable(${PROJECT_NAME} main.cpp gui/main_window.cpp gui/main_window.hpp)
+
+set_target_properties(
+        ${PROJECT_NAME}
+        PROPERTIES CXX_STANDARD 23
+        ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/out/${CMAKE_BUILD_TYPE}"
+        LIBRARY_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/out/${CMAKE_BUILD_TYPE}"
+        RUNTIME_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/out/${CMAKE_BUILD_TYPE}")
+
+find_package(OpenGL)
+find_package(GLEW REQUIRED)
+find_package(glfw3 CONFIG REQUIRED)
+target_link_libraries(${PROJECT_NAME} PRIVATE glfw imgui::imgui omath::omath OpenGL::GL)

examples/example_hud/gui/main_window.cpp

@@ -0,0 +1,110 @@
+//
+// Created by Orange on 11/11/2024.
+//
+
+#include "main_window.hpp"
+#include "omath/hud/renderer_realizations/imgui_renderer.hpp"
+#include <GLFW/glfw3.h>
+#include <algorithm>
+#include <imgui.h>
+#include <imgui_impl_glfw.h>
+#include <imgui_impl_opengl3.h>
+#include <omath/hud/entity_overlay.hpp>
+
+namespace imgui_desktop::gui
+{
+    bool MainWindow::m_canMoveWindow = false;
+
+    MainWindow::MainWindow(const std::string_view& caption, int width, int height)
+    {
+        if (!glfwInit())
+            std::exit(EXIT_FAILURE);
+
+        glfwWindowHint(GLFW_TRANSPARENT_FRAMEBUFFER, true);
+        m_window = glfwCreateWindow(width, height, caption.data(), nullptr, nullptr);
+
+        glfwMakeContextCurrent(m_window);
+
+        ImGui::CreateContext();
+        ImGui::StyleColorsDark();
+
+        ImGui::GetStyle().Colors[ImGuiCol_WindowBg] = {0.f, 0.f, 0.f, 0.f};
+
+        ImGui::GetStyle().AntiAliasedLines = false;
+        ImGui::GetStyle().AntiAliasedFill = false;
+
+        ImGui_ImplGlfw_InitForOpenGL(m_window, true);
+        ImGui_ImplOpenGL3_Init("#version 130");
+    }
+
+    void MainWindow::Run()
+    {
+        omath::Color box_color = {0.f, 0.f, 0.f, 1.f};
+        omath::Color box_fill = {0.f, 0.f, 0.f, 0.f};
+        omath::Color bar_color = {0.f, 1.f, 0.f, 1.f};
+        omath::Color bar_bg_color = {0.f, 0.f, 0.f, 0.0f};
+        omath::Color bar_outline_color = {0.f, 0.f, 0.f, 1.f};
+        float bar_width = 3.f;
+        float bar_value = 1.f;
+
+        while (!glfwWindowShouldClose(m_window) && m_opened)
+        {
+            glfwPollEvents();
+
+            ImGui_ImplOpenGL3_NewFrame();
+            ImGui_ImplGlfw_NewFrame();
+            ImGui::NewFrame();
+
+            ImGui::GetBackgroundDrawList()->AddRectFilled({}, ImGui::GetMainViewport()->Size, ImColor(40, 40, 40, 200));
+
+            ImGui::Begin("OHUD Showcase", &m_opened,
+                         ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoCollapse | ImGuiWindowFlags_NoDecoration);
+            {
+                ImGui::SetWindowPos({});
+                ImGui::SetWindowSize(ImGui::GetMainViewport()->Size);
+
+                ImGui::ColorEdit4("Box", reinterpret_cast<float*>(&box_color), ImGuiColorEditFlags_NoInputs);
+                ImGui::ColorEdit4("Box fill", reinterpret_cast<float*>(&box_fill), ImGuiColorEditFlags_NoInputs);
+                ImGui::ColorEdit4("Bar", reinterpret_cast<float*>(&bar_color), ImGuiColorEditFlags_NoInputs);
+                ImGui::ColorEdit4("Bar Background", reinterpret_cast<float*>(&bar_bg_color),
+                                  ImGuiColorEditFlags_NoInputs);
+                ImGui::ColorEdit4("Bar Outline", reinterpret_cast<float*>(&bar_outline_color),
+                                  ImGuiColorEditFlags_NoInputs);
+
+                ImGui::PushItemWidth(100.f);
+                ImGui::SliderFloat("Bar Width", &bar_width, 1.f, 20.f);
+                ImGui::SliderFloat("Bar Value", &bar_value, 0.f, 1.f);
+                ImGui::PopItemWidth();
+                ImGui::End();
+            }
+
+            omath::hud::EntityOverlay ent({400.f, 100.f}, {400.f, 400.f}, std::make_shared<omath::hud::ImguiHudRenderer>());
+
+            ent.add_2d_box(box_color, box_fill, 1.f);
+            ent.add_cornered_2d_box(omath::Color::from_rgba(255, 0, 255, 255), box_fill);
+            ent.add_right_bar(bar_color, bar_outline_color, bar_bg_color, bar_width, bar_value);
+            ent.add_left_bar(bar_color, bar_outline_color, bar_bg_color, bar_width, bar_value);
+            ent.add_top_bar(bar_color, bar_outline_color, bar_bg_color, bar_width, bar_value);
+            ent.add_right_label({0.f, 1.f, 0.f, 1.f}, 3, true, "Health: {}/100", 100);
+            ent.add_right_label({1.f, 0.f, 0.f, 1.f}, 3, true, "Shield: {}/125", 125);
+            ent.add_right_label({1.f, 0.f, 1.f, 1.f}, 3, true, "*LOCKED*");
+
+            ent.add_top_label(omath::Color::from_rgba(255, 255, 0, 255), 3, true, "*SCOPED*");
+            ent.add_top_label(omath::Color::from_rgba(255, 0, 0, 255), 3, true, "*BLEEDING*");
+            ent.add_snap_line(omath::Vector2<float>{400, 600}, omath::Color::from_rgba(255, 0, 0, 255), 2.f);
+            ImGui::Render();
+
+            int display_w, display_h;
+
+            glfwGetFramebufferSize(m_window, &display_w, &display_h);
+            glViewport(0, 0, display_w, display_h);
+
+            glClearColor(0.f, 0.f, 0.f, 0.f);
+            glClear(GL_COLOR_BUFFER_BIT);
+            ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
+            glfwSwapBuffers(m_window);
+        }
+        glfwDestroyWindow(m_window);
+    }
+} // namespace imgui_desktop::gui
+// imgui_desktop

examples/example_hud/gui/main_window.hpp

@@ -0,0 +1,28 @@
+//
+// Created by Vlad on 6/17/2025.
+//
+
+//
+// Created by Orange on 11/11/2024.
+//
+#pragma once
+#include <string_view>
+
+struct GLFWwindow;
+
+namespace imgui_desktop::gui
+{
+    class MainWindow
+    {
+    public:
+        MainWindow(const std::string_view &caption, int width, int height);
+
+        void Run();
+
+    private:
+        GLFWwindow* m_window;
+        static bool m_canMoveWindow;
+        bool m_opened = true;
+    };
+} // gui
+// imgui_desktop

examples/example_hud/main.cpp

@@ -0,0 +1,8 @@
+//
+// Created by orange on 13.03.2026.
+//
+#include "gui/main_window.hpp"
+int main()
+{
+    imgui_desktop::gui::MainWindow("omath::hud", 800, 600).Run();
+}

include/omath/hud/canvas_box.hpp

@@ -0,0 +1,23 @@
+//
+// Created by orange on 13.03.2026.
+//
+#pragma once
+#include "omath/linear_algebra/vector2.hpp"
+#include <array>
+namespace omath::hud
+{
+    class CanvasBox final
+    {
+    public:
+        CanvasBox(Vector2<float> top, Vector2<float> bottom, float ratio = 4.f);
+
+        [[nodiscard]]
+        std::array<Vector2<float>, 4> as_array() const;
+
+        Vector2<float> top_left_corner;
+        Vector2<float> top_right_corner;
+
+        Vector2<float> bottom_left_corner;
+        Vector2<float> bottom_right_corner;
+    };
+} // namespace omath::hud

include/omath/hud/entity_overlay.hpp

@@ -0,0 +1,66 @@
+//
+// Created by orange on 13.03.2026.
+//
+#pragma once
+#include "canvas_box.hpp"
+#include "hud_renderer_interface.hpp"
+#include "omath/linear_algebra/vector2.hpp"
+#include "omath/utility/color.hpp"
+#include <memory>
+#include <string_view>
+namespace omath::hud
+{
+    class EntityOverlay final
+    {
+    public:
+        EntityOverlay(const Vector2<float>& top, const Vector2<float>& bottom,
+                            const std::shared_ptr<HudRendererInterface>& renderer);
+
+        void add_2d_box(const Color& box_color, const Color& fill_color = Color{0.f, 0.f, 0.f, 0.f},
+                        float thickness = 1.f) const;
+
+        void add_cornered_2d_box(const Color& box_color, const Color& fill_color = Color{0.f, 0.f, 0.f, 0.f},
+                                 float corner_ratio_len = 0.2f, float thickness = 1.f) const;
+
+        void add_right_bar(const Color& color, const Color& outline_color, const Color& bg_color, float width,
+                           float ratio, float offset = 5.f);
+
+        void add_left_bar(const Color& color, const Color& outline_color, const Color& bg_color, float width,
+                          float ratio, float offset = 5.f) const;
+
+        template<typename... Args>
+        void add_right_label(const Color& color, const float offset, const bool outlined,
+                             std::format_string<Args...> fmt, Args&&... args)
+        {
+            const std::string label = std::vformat(fmt.get(), std::make_format_args(args...));
+
+            add_right_label(color, offset, outlined, std::string_view{label});
+        }
+
+        void add_right_label(const Color& color, float offset, bool outlined, const std::string_view& text);
+
+        template<typename... Args>
+        void add_top_label(const Color& color, const float offset, const bool outlined, std::format_string<Args...> fmt,
+                           Args&&... args)
+        {
+            const std::string label = std::vformat(fmt.get(), std::make_format_args(args...));
+
+            add_top_label(color, offset, outlined, std::string_view{label});
+        }
+
+        void add_top_label(const Color& color, float offset, bool outlined, std::string_view text);
+
+        void add_top_bar(const Color& color, const Color& outline_color, const Color& bg_color, float height,
+                         float ratio, float offset = 5.f);
+
+        void add_snap_line(const Vector2<float>& start_pos, const Color& color, float width);
+
+    private:
+        void draw_outlined_text(const Vector2<float>& position, const Color& color,
+                                       const std::string_view& text);
+        CanvasBox m_canvas;
+        Vector2<float> m_text_cursor_right;
+        Vector2<float> m_text_cursor_top;
+        std::shared_ptr<HudRendererInterface> m_renderer;
+    };
+} // namespace omath::hud

include/omath/hud/hud_renderer_interface.hpp

@@ -0,0 +1,33 @@
+//
+// Created by orange on 13.03.2026.
+//
+#pragma once
+#include "omath/linear_algebra/vector2.hpp"
+#include "omath/utility/color.hpp"
+#include <span>
+
+namespace omath::hud
+{
+    class HudRendererInterface
+    {
+    public:
+        virtual ~HudRendererInterface() = default;
+        virtual void add_line(const Vector2<float>& line_start, const Vector2<float>& line_end, const Color& color,
+                              float thickness) = 0;
+
+        virtual void add_polyline(const std::span<const Vector2<float>>& vertexes, const Color& color,
+                                  float thickness) = 0;
+
+        virtual void add_filled_polyline(const std::span<const Vector2<float>>& vertexes, const Color& color,
+                                         float thickness) = 0;
+
+        virtual void add_rectangle(const Vector2<float>& min, const Vector2<float>& max, const Color& color) = 0;
+
+        virtual void add_filled_rectangle(const Vector2<float>& min, const Vector2<float>& max, const Color& color) = 0;
+
+        virtual void add_text(const Vector2<float>& position, const Color& color, const std::string_view& text) = 0;
+
+        [[nodiscard]]
+        virtual Vector2<float> calc_text_size(const std::string_view& text) = 0;
+    };
+} // namespace omath::hud

include/omath/hud/renderer_realizations/imgui_renderer.hpp

@@ -0,0 +1,25 @@
+//
+// Created by orange on 13.03.2026.
+//
+#pragma once
+#include <omath/hud/hud_renderer_interface.hpp>
+
+#ifdef OMATH_IMGUI_INTEGRATION
+namespace omath::hud
+{
+    class ImguiHudRenderer final : public HudRendererInterface
+    {
+    public:
+        ~ImguiHudRenderer() override;
+        void add_line(const Vector2<float>& line_start, const Vector2<float>& line_end, const Color& color,
+                      float thickness) override;
+        void add_polyline(const std::span<const Vector2<float>>& vertexes, const Color& color, float thickness) override;
+        void add_filled_polyline(const std::span<const Vector2<float>>& vertexes, const Color& color, float thickness) override;
+        void add_rectangle(const Vector2<float>& min, const Vector2<float>& max, const Color& color) override;
+        void add_filled_rectangle(const Vector2<float>& min, const Vector2<float>& max, const Color& color) override;
+        void add_text(const Vector2<float>& position, const Color& color, const std::string_view& text) override;
+        [[nodiscard]]
+        virtual Vector2<float> calc_text_size(const std::string_view& text) override;
+    };
+} // namespace omath::hud
+#endif // OMATH_IMGUI_INTEGRATION

source/hud/canvas_box.cpp

@@ -0,0 +1,27 @@
+//
+// Created by orange on 13.03.2026.
+//
+//
+// Created by Vlad on 6/17/2025.
+//
+#include "omath/hud/canvas_box.hpp"
+
+namespace omath::hud
+{
+
+    CanvasBox::CanvasBox(const Vector2<float> top, Vector2<float> bottom, const float ratio)
+    {
+        bottom.x = top.x;
+        const auto height = std::abs(top.y - bottom.y);
+
+        top_left_corner = top - Vector2<float>{height / ratio, 0};
+        top_right_corner = top + Vector2<float>{height / ratio, 0};
+
+        bottom_left_corner = bottom - Vector2<float>{height / ratio, 0};
+        bottom_right_corner = bottom + Vector2<float>{height / ratio, 0};
+    }
+    std::array<Vector2<float>, 4> CanvasBox::as_array() const
+    {
+        return {top_left_corner, top_right_corner, bottom_right_corner, bottom_left_corner};
+    }
+} // namespace ohud

source/hud/entity_overlay.cpp

@@ -0,0 +1,138 @@
+//
+// Created by orange on 13.03.2026.
+//
+#include "omath/hud/entity_overlay.hpp"
+
+namespace omath::hud
+{
+    void EntityOverlay::add_2d_box(const Color& box_color, const Color& fill_color, const float thickness) const
+    {
+        const auto points = m_canvas.as_array();
+
+        m_renderer->add_polyline({points.data(), points.size()}, box_color, thickness);
+        m_renderer->add_filled_polyline({points.data(), points.size()}, fill_color, thickness);
+    }
+    void EntityOverlay::add_cornered_2d_box(const Color& box_color, const Color& fill_color,
+                                            const float corner_ratio_len, const float thickness) const
+    {
+        const auto corner_line_length =
+                std::abs((m_canvas.top_left_corner - m_canvas.top_right_corner).x * corner_ratio_len);
+
+        if (fill_color.value().w > 0.f)
+            add_2d_box(fill_color, fill_color);
+        // Left Side
+        m_renderer->add_line(m_canvas.top_left_corner,
+                             m_canvas.top_left_corner + Vector2<float>{corner_line_length, 0.f}, box_color, thickness);
+
+        m_renderer->add_line(m_canvas.top_left_corner,
+                             m_canvas.top_left_corner + Vector2<float>{0.f, corner_line_length}, box_color, thickness);
+
+        m_renderer->add_line(m_canvas.bottom_left_corner,
+                             m_canvas.bottom_left_corner - Vector2<float>{0.f, corner_line_length}, box_color,
+                             thickness);
+
+        m_renderer->add_line(m_canvas.bottom_left_corner,
+                             m_canvas.bottom_left_corner + Vector2<float>{corner_line_length, 0.f}, box_color,
+                             thickness);
+        // Right Side
+        m_renderer->add_line(m_canvas.top_right_corner,
+                             m_canvas.top_right_corner - Vector2<float>{corner_line_length, 0.f}, box_color, thickness);
+
+        m_renderer->add_line(m_canvas.top_right_corner,
+                             m_canvas.top_right_corner + Vector2<float>{0.f, corner_line_length}, box_color, thickness);
+
+        m_renderer->add_line(m_canvas.bottom_right_corner,
+                             m_canvas.bottom_right_corner - Vector2<float>{0.f, corner_line_length}, box_color,
+                             thickness);
+
+        m_renderer->add_line(m_canvas.bottom_right_corner,
+                             m_canvas.bottom_right_corner - Vector2<float>{corner_line_length, 0.f}, box_color,
+                             thickness);
+    }
+    void EntityOverlay::add_right_bar(const Color& color, const Color& outline_color, const Color& bg_color,
+                                      const float width, float ratio, const float offset)
+    {
+        ratio = std::clamp(ratio, 0.f, 1.f);
+        const auto max_bar_height = std::abs(m_canvas.top_right_corner.y - m_canvas.bottom_right_corner.y);
+
+        const auto bar_start = m_canvas.bottom_right_corner + Vector2<float>{offset, 0.f};
+        m_renderer->add_filled_rectangle(bar_start, bar_start + Vector2<float>(width, -max_bar_height), bg_color);
+
+        m_renderer->add_filled_rectangle(bar_start, bar_start + Vector2<float>(width, -max_bar_height * ratio), color);
+        m_renderer->add_rectangle(bar_start - Vector2<float>(1.f, 0.f),
+                                  bar_start + Vector2<float>(width, -max_bar_height), outline_color);
+
+        m_text_cursor_right.x += offset + width;
+    }
+    void EntityOverlay::add_left_bar(const Color& color, const Color& outline_color, const Color& bg_color,
+                                     const float width, float ratio, const float offset) const
+    {
+        ratio = std::clamp(ratio, 0.f, 1.f);
+        const auto max_bar_height = std::abs(m_canvas.top_left_corner.y - m_canvas.bottom_right_corner.y);
+
+        const auto bar_start = m_canvas.bottom_left_corner + Vector2<float>{-(offset + width), 0.f};
+        m_renderer->add_filled_rectangle(bar_start, bar_start + Vector2<float>(width, -max_bar_height), bg_color);
+
+        m_renderer->add_filled_rectangle(bar_start, bar_start + Vector2<float>(width, -max_bar_height * ratio), color);
+        m_renderer->add_rectangle(bar_start - Vector2<float>(1.f, 0.f),
+                                  bar_start + Vector2<float>(width, -max_bar_height), outline_color);
+    }
+    void EntityOverlay::add_right_label(const Color& color, const float offset, const bool outlined,
+                                        const std::string_view& text)
+    {
+        if (outlined)
+            draw_outlined_text(m_text_cursor_right + Vector2<float>{offset, 0.f}, color, text);
+        else
+            m_renderer->add_text(m_text_cursor_right + Vector2<float>{offset, 0.f}, color, text.data());
+
+        m_text_cursor_right.y += m_renderer->calc_text_size(text.data()).y;
+    }
+    void EntityOverlay::add_top_label(const Color& color, const float offset, const bool outlined,
+                                      const std::string_view text)
+    {
+        m_text_cursor_top.y -= m_renderer->calc_text_size(text.data()).y;
+
+        if (outlined)
+            draw_outlined_text(m_text_cursor_top + Vector2<float>{0.f, -offset}, color, text);
+        else
+            m_renderer->add_text(m_text_cursor_top + Vector2<float>{0.f, -offset}, color, text.data());
+    }
+    void EntityOverlay::add_top_bar(const Color& color, const Color& outline_color, const Color& bg_color,
+                                    const float height, float ratio, const float offset)
+    {
+        ratio = std::clamp(ratio, 0.f, 1.f);
+        const auto max_bar_width = std::abs(m_canvas.top_left_corner.x - m_canvas.bottom_right_corner.x);
+
+        const auto bar_start = m_canvas.top_left_corner - Vector2<float>{0.f, offset};
+        m_renderer->add_filled_rectangle(bar_start, bar_start + Vector2<float>(max_bar_width, -height), bg_color);
+
+        m_renderer->add_filled_rectangle(bar_start, bar_start + Vector2<float>(max_bar_width * ratio, -height), color);
+        m_renderer->add_rectangle(bar_start, bar_start + Vector2<float>(max_bar_width, -height), outline_color);
+
+        m_text_cursor_top.y -= offset + height;
+    }
+    void EntityOverlay::add_snap_line(const Vector2<float>& start_pos, const Color& color, const float width)
+    {
+        const Vector2<float> line_end =
+                m_canvas.bottom_left_corner
+                + Vector2<float>{m_canvas.bottom_right_corner.x - m_canvas.bottom_left_corner.x, 0.f} / 2;
+        m_renderer->add_line(start_pos, line_end, color, width);
+    }
+    void EntityOverlay::draw_outlined_text(const Vector2<float>& position, const Color& color,
+                                           const std::string_view& text)
+    {
+        static constexpr std::array outline_offsets = {
+                Vector2<float>{-1, -1}, Vector2<float>{-1, 0}, Vector2<float>{-1, 1}, Vector2<float>{0, -1},
+                Vector2<float>{0, 1},   Vector2<float>{1, -1}, Vector2<float>{1, 0},  Vector2<float>{1, 1}};
+
+        for (const auto& outline_offset : outline_offsets)
+            m_renderer->add_text(position + outline_offset, Color{0.f, 0.f, 0.f, 1.f}, text.data());
+        m_renderer->add_text(position, color, text.data());
+    }
+    EntityOverlay::EntityOverlay(const Vector2<float>& top, const Vector2<float>& bottom,
+                                 const std::shared_ptr<HudRendererInterface>& renderer)
+        : m_canvas(top, bottom), m_text_cursor_right(m_canvas.top_right_corner),
+          m_text_cursor_top(m_canvas.top_left_corner), m_renderer(renderer)
+    {
+    }
+} // namespace omath::hud

source/hud/renderer_realizations/imgui_renderer.cpp

@@ -0,0 +1,58 @@
+//
+// Created by orange on 13.03.2026.
+//
+#include "omath/hud/renderer_realizations/imgui_renderer.hpp"
+
+#ifdef OMATH_IMGUI_INTEGRATION
+#include <imgui.h>
+
+namespace omath::hud
+{
+    ImguiHudRenderer::~ImguiHudRenderer() = default;
+
+    void ImguiHudRenderer::add_line(const Vector2<float>& line_start, const Vector2<float>& line_end,
+                                    const Color& color, const float thickness)
+    {
+        ImGui::GetBackgroundDrawList()->AddLine(line_start.to_im_vec2(), line_end.to_im_vec2(), color.to_im_color(),
+                                                thickness);
+    }
+
+    void ImguiHudRenderer::add_polyline(const std::span<const Vector2<float>>& vertexes, const Color& color,
+                                        const float thickness)
+    {
+        ImGui::GetBackgroundDrawList()->AddPolyline(reinterpret_cast<const ImVec2*>(vertexes.data()),
+                                                    static_cast<int>(vertexes.size()), color.to_im_color(),
+                                                    ImDrawFlags_None, thickness);
+    }
+
+    void ImguiHudRenderer::add_filled_polyline(const std::span<const Vector2<float>>& vertexes, const Color& color,
+                                               const float thickness)
+    {
+        ImGui::GetBackgroundDrawList()->AddPolyline(reinterpret_cast<const ImVec2*>(vertexes.data()),
+                                                    static_cast<int>(vertexes.size()), color.to_im_color(),
+                                                    ImDrawFlags_Closed, thickness);
+    }
+
+    void ImguiHudRenderer::add_rectangle(const Vector2<float>& min, const Vector2<float>& max, const Color& color)
+    {
+        ImGui::GetBackgroundDrawList()->AddRect(min.to_im_vec2(), max.to_im_vec2(), color.to_im_color());
+    }
+
+    void ImguiHudRenderer::add_filled_rectangle(const Vector2<float>& min, const Vector2<float>& max,
+                                                const Color& color)
+    {
+        ImGui::GetBackgroundDrawList()->AddRectFilled(min.to_im_vec2(), max.to_im_vec2(), color.to_im_color());
+    }
+
+    void ImguiHudRenderer::add_text(const Vector2<float>& position, const Color& color, const std::string_view& text)
+    {
+        ImGui::GetBackgroundDrawList()->AddText(position.to_im_vec2(), color.to_im_color(), text.data(),
+                                                text.data() + text.size());
+    }
+    [[nodiscard]]
+    Vector2<float> calc_text_size(const std::string_view& text)
+    {
+        return Vector2<float>::from_im_vec2(ImGui::CalcTextSize(text.data()));
+    }
+} // namespace omath::hud
+#endif // OMATH_IMGUI_INTEGRATION

tests/CMakeLists.txt

@@ -4,7 +4,7 @@ project(unit_tests)
 
 include(GoogleTest)
 
-file(GLOB_RECURSE UNIT_TESTS_SOURCES CONFIGURE_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/general/*.cpp" "${CMAKE_CURRENT_SOURCE_DIR}/engines/*.cpp")
+file(GLOB_RECURSE UNIT_TESTS_SOURCES CONFIGURE_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/general/*.cpp" "${CMAKE_CURRENT_SOURCE_DIR}/engines/*.cpp" "${CMAKE_CURRENT_SOURCE_DIR}/*.hpp")
 add_executable(${PROJECT_NAME} ${UNIT_TESTS_SOURCES} main.cpp)
 
 set_target_properties(

tests/general/mem_fd_helper.hpp

@@ -0,0 +1,192 @@
+#pragma once
+// Cross-platform helper for creating binary test "files" without writing to disk where possible.
+//
+// Strategy:
+//   - Linux (non-Android, or Android API >= 30): memfd_create → /proc/self/fd/<N>  (no disk I/O)
+//   - All other platforms: anonymous temp file via std::tmpfile(), accessed via /proc/self/fd/<N>
+//     on Linux, or a named temp file (cleaned up on destruction) elsewhere.
+//
+// Usage:
+//   auto f = MemFdFile::create(myVector);
+//   ASSERT_TRUE(f.valid());
+//   scanner.scan_for_pattern_in_file(f.path(), ...);
+
+#include <cstdint>
+#include <cstring>
+#include <filesystem>
+#include <fstream>
+#include <random>
+#include <string>
+#include <vector>
+
+#if defined(__linux__)
+#  include <unistd.h>
+#  include <fcntl.h>
+#  if defined(__ANDROID__)
+#    if __ANDROID_API__ >= 30
+#      include <sys/mman.h>
+#      define OMATH_TEST_USE_MEMFD 1
+#    endif
+// Android < 30: fall through to tmpfile() path below
+#  else
+// Desktop Linux: memfd_create available since glibc 2.27 / kernel 3.17
+#    include <sys/mman.h>
+#    define OMATH_TEST_USE_MEMFD 1
+#  endif
+#endif
+
+class MemFdFile
+{
+public:
+    MemFdFile() = default;
+
+    ~MemFdFile()
+    {
+#if defined(OMATH_TEST_USE_MEMFD)
+        if (m_fd >= 0)
+            ::close(m_fd);
+#else
+        if (!m_temp_path.empty())
+            std::filesystem::remove(m_temp_path);
+#endif
+    }
+
+    MemFdFile(const MemFdFile&) = delete;
+    MemFdFile& operator=(const MemFdFile&) = delete;
+
+    MemFdFile(MemFdFile&& o) noexcept
+        : m_path(std::move(o.m_path))
+#if defined(OMATH_TEST_USE_MEMFD)
+        , m_fd(o.m_fd)
+#else
+        , m_temp_path(std::move(o.m_temp_path))
+#endif
+    {
+#if defined(OMATH_TEST_USE_MEMFD)
+        o.m_fd = -1;
+#else
+        o.m_temp_path.clear();
+#endif
+    }
+
+    [[nodiscard]] bool valid() const { return !m_path.empty(); }
+
+    [[nodiscard]] const std::filesystem::path& path() const { return m_path; }
+
+    static MemFdFile create(const std::vector<std::uint8_t>& data)
+    {
+        return create(data.data(), data.size());
+    }
+
+    static MemFdFile create(const std::uint8_t* data, std::size_t size)
+    {
+        MemFdFile f;
+
+#if defined(OMATH_TEST_USE_MEMFD)
+        f.m_fd = static_cast<int>(::memfd_create("test_bin", 0));
+        if (f.m_fd < 0)
+            return f;
+
+        if (!write_all(f.m_fd, data, size))
+        {
+            ::close(f.m_fd);
+            f.m_fd = -1;
+            return f;
+        }
+        f.m_path = "/proc/self/fd/" + std::to_string(f.m_fd);
+
+#else
+        // Portable fallback: write to a uniquely-named temp file and delete on destruction
+        const auto tmp_dir = std::filesystem::temp_directory_path();
+        std::mt19937_64 rng(std::random_device{}());
+        const auto unique_name = "omath_test_" + std::to_string(rng()) + ".bin";
+        f.m_temp_path = (tmp_dir / unique_name).string();
+        f.m_path      = f.m_temp_path;
+
+        std::ofstream out(f.m_temp_path, std::ios::binary | std::ios::trunc);
+        if (!out.is_open())
+        {
+            f.m_temp_path.clear();
+            f.m_path.clear();
+            return f;
+        }
+        out.write(reinterpret_cast<const char*>(data), static_cast<std::streamsize>(size));
+        if (!out)
+        {
+            out.close();
+            std::filesystem::remove(f.m_temp_path);
+            f.m_temp_path.clear();
+            f.m_path.clear();
+        }
+#endif
+        return f;
+    }
+
+private:
+    std::filesystem::path m_path;
+
+#if defined(OMATH_TEST_USE_MEMFD)
+    int m_fd = -1;
+
+    static bool write_all(int fd, const std::uint8_t* data, std::size_t size)
+    {
+        std::size_t written = 0;
+        while (written < size)
+        {
+            const auto n = ::write(fd, data + written, size - written);
+            if (n <= 0)
+                return false;
+            written += static_cast<std::size_t>(n);
+        }
+        return true;
+    }
+#else
+    std::string m_temp_path;
+#endif
+};
+
+// ---------------------------------------------------------------------------
+// Build a minimal PE binary in-memory with a single .text section.
+// Layout (all offsets compile-time):
+//   0x00: DOS header (64 B)   0x40: pad   0x80: NT sig   0x84: FileHeader (20 B)
+//   0x98: OptionalHeader (0xF0 B)   0x188: SectionHeader (44 B)   0x1B4: section data
+// ---------------------------------------------------------------------------
+inline std::vector<std::uint8_t> build_minimal_pe(const std::vector<std::uint8_t>& section_bytes)
+{
+    constexpr std::uint32_t e_lfanew  = 0x80u;
+    constexpr std::uint16_t size_opt  = 0xF0u;
+    constexpr std::size_t   nt_off    = e_lfanew;
+    constexpr std::size_t   fh_off    = nt_off + 4;
+    constexpr std::size_t   oh_off    = fh_off + 20;
+    constexpr std::size_t   sh_off    = oh_off + size_opt;
+    constexpr std::size_t   data_off  = sh_off + 44;
+
+    std::vector<std::uint8_t> buf(data_off + section_bytes.size(), 0u);
+
+    buf[0] = 'M'; buf[1] = 'Z';
+    std::memcpy(buf.data() + 0x3Cu, &e_lfanew, 4);
+
+    buf[nt_off] = 'P'; buf[nt_off + 1] = 'E';
+
+    const std::uint16_t machine = 0x8664u, num_sections = 1u;
+    std::memcpy(buf.data() + fh_off,      &machine,      2);
+    std::memcpy(buf.data() + fh_off + 2,  &num_sections, 2);
+    std::memcpy(buf.data() + fh_off + 16, &size_opt,     2);
+
+    const std::uint16_t magic = 0x20Bu;
+    std::memcpy(buf.data() + oh_off, &magic, 2);
+
+    const char name[8] = {'.','t','e','x','t',0,0,0};
+    std::memcpy(buf.data() + sh_off, name, 8);
+
+    const auto vsize   = static_cast<std::uint32_t>(section_bytes.size());
+    const std::uint32_t vaddr   = 0x1000u;
+    const auto ptr_raw = static_cast<std::uint32_t>(data_off);
+    std::memcpy(buf.data() + sh_off + 8,  &vsize,   4);
+    std::memcpy(buf.data() + sh_off + 12, &vaddr,   4);
+    std::memcpy(buf.data() + sh_off + 16, &vsize,   4);
+    std::memcpy(buf.data() + sh_off + 20, &ptr_raw, 4);
+
+    std::memcpy(buf.data() + data_off, section_bytes.data(), section_bytes.size());
+    return buf;
+}

tests/general/unit_test_macho_scanner.cpp

@@ -6,8 +6,8 @@
 #include <omath/utility/macho_pattern_scan.hpp>
 #include <cstdint>
 #include <cstring>
-#include <fstream>
 #include <vector>
+#include "mem_fd_helper.hpp"
 
 using namespace omath;
 
@@ -16,11 +16,12 @@ namespace
     // Mach-O magic numbers
     constexpr std::uint32_t mh_magic_64 = 0xFEEDFACF;
     constexpr std::uint32_t mh_magic_32 = 0xFEEDFACE;
-    constexpr std::uint32_t lc_segment = 0x1;
+    constexpr std::uint32_t lc_segment  = 0x1;
     constexpr std::uint32_t lc_segment_64 = 0x19;
 
     constexpr std::string_view segment_name = "__TEXT";
     constexpr std::string_view section_name = "__text";
+
 #pragma pack(push, 1)
     struct MachHeader64
     {
@@ -107,249 +108,174 @@ namespace
     };
 #pragma pack(pop)
 
-    // Helper function to create a minimal 64-bit Mach-O file with a __text section
+    // Build a minimal 64-bit Mach-O binary in-memory with a __text section
-    bool write_minimal_macho64_file(const std::string& path, const std::vector<std::uint8_t>& section_bytes)
+    std::vector<std::uint8_t> build_minimal_macho64(const std::vector<std::uint8_t>& section_bytes)
     {
-        std::ofstream f(path, std::ios::binary);
+        constexpr std::size_t load_cmd_size = sizeof(SegmentCommand64) + sizeof(Section64);
-        if (!f.is_open())
+        const std::size_t section_offset    = sizeof(MachHeader64) + load_cmd_size;
-            return false;
 
-        // Calculate sizes
+        std::vector<std::uint8_t> buf(section_offset + section_bytes.size(), 0u);
-        constexpr std::size_t header_size = sizeof(MachHeader64);
-        constexpr std::size_t segment_size = sizeof(SegmentCommand64);
-        constexpr std::size_t section_size = sizeof(Section64);
-        constexpr std::size_t load_cmd_size = segment_size + section_size;
-        // Section data will start after headers
-        const std::size_t section_offset = header_size + load_cmd_size;
 
-        // Create Mach-O header
+        auto* header = reinterpret_cast<MachHeader64*>(buf.data());
-        MachHeader64 header{};
+        header->magic      = mh_magic_64;
-        header.magic = mh_magic_64;
+        header->cputype    = 0x01000007;  // CPU_TYPE_X86_64
-        header.cputype = 0x01000007;  // CPU_TYPE_X86_64
+        header->cpusubtype = 0x3;
-        header.cpusubtype = 0x3;       // CPU_SUBTYPE_X86_64_ALL
+        header->filetype   = 0x2;         // MH_EXECUTE
-        header.filetype = 0x2;         // MH_EXECUTE
+        header->ncmds      = 1;
-        header.ncmds = 1;
+        header->sizeofcmds = static_cast<std::uint32_t>(load_cmd_size);
-        header.sizeofcmds = static_cast<std::uint32_t>(load_cmd_size);
-        header.flags = 0;
-        header.reserved = 0;
 
-        f.write(reinterpret_cast<const char*>(&header), sizeof(header));
+        auto* segment = reinterpret_cast<SegmentCommand64*>(buf.data() + sizeof(MachHeader64));
+        segment->cmd      = lc_segment_64;
+        segment->cmdsize  = static_cast<std::uint32_t>(load_cmd_size);
+        std::ranges::copy(segment_name, segment->segname);
+        segment->vmaddr   = 0x100000000;
+        segment->vmsize   = section_bytes.size();
+        segment->fileoff  = section_offset;
+        segment->filesize = section_bytes.size();
+        segment->maxprot  = 7;
+        segment->initprot = 5;
+        segment->nsects   = 1;
 
-        // Create segment command
+        auto* section = reinterpret_cast<Section64*>(buf.data() + sizeof(MachHeader64) + sizeof(SegmentCommand64));
-        SegmentCommand64 segment{};
+        std::ranges::copy(section_name, section->sectname);
-        segment.cmd = lc_segment_64;
+        std::ranges::copy(segment_name, section->segname);
-        segment.cmdsize = static_cast<std::uint32_t>(load_cmd_size);
+        section->addr   = 0x100000000;
-        std::ranges::copy(segment_name, segment.segname);
+        section->size   = section_bytes.size();
-        segment.vmaddr = 0x100000000;
+        section->offset = static_cast<std::uint32_t>(section_offset);
-        segment.vmsize = section_bytes.size();
-        segment.fileoff = section_offset;
-        segment.filesize = section_bytes.size();
-        segment.maxprot = 7;   // VM_PROT_ALL
-        segment.initprot = 5;  // VM_PROT_READ | VM_PROT_EXECUTE
-        segment.nsects = 1;
-        segment.flags = 0;
 
-        f.write(reinterpret_cast<const char*>(&segment), sizeof(segment));
+        std::memcpy(buf.data() + section_offset, section_bytes.data(), section_bytes.size());
-
+        return buf;
-        // Create section
-        Section64 section{};
-        std::ranges::copy(section_name, section.sectname);
-        std::ranges::copy(segment_name, segment.segname);
-        section.addr = 0x100000000;
-        section.size = section_bytes.size();
-        section.offset = static_cast<std::uint32_t>(section_offset);
-        section.align = 0;
-        section.reloff = 0;
-        section.nreloc = 0;
-        section.flags = 0;
-        section.reserved1 = 0;
-        section.reserved2 = 0;
-        section.reserved3 = 0;
-
-        f.write(reinterpret_cast<const char*>(&section), sizeof(section));
-
-        // Write section data
-        f.write(reinterpret_cast<const char*>(section_bytes.data()), static_cast<std::streamsize>(section_bytes.size()));
-
-        f.close();
-        return true;
     }
 
-    // Helper function to create a minimal 32-bit Mach-O file with a __text section
+    // Build a minimal 32-bit Mach-O binary in-memory with a __text section
-    bool write_minimal_macho32_file(const std::string& path, const std::vector<std::uint8_t>& section_bytes)
+    std::vector<std::uint8_t> build_minimal_macho32(const std::vector<std::uint8_t>& section_bytes)
     {
-        std::ofstream f(path, std::ios::binary);
+        constexpr std::size_t load_cmd_size = sizeof(SegmentCommand32) + sizeof(Section32);
-        if (!f.is_open())
+        constexpr std::size_t section_offset = sizeof(MachHeader32) + load_cmd_size;
-            return false;
 
-        // Calculate sizes
+        std::vector<std::uint8_t> buf(section_offset + section_bytes.size(), 0u);
-        constexpr std::size_t header_size = sizeof(MachHeader32);
-        constexpr std::size_t segment_size = sizeof(SegmentCommand32);
-        constexpr std::size_t section_size = sizeof(Section32);
-        constexpr std::size_t load_cmd_size = segment_size + section_size;
 
-        // Section data will start after headers
+        auto* header = reinterpret_cast<MachHeader32*>(buf.data());
-        constexpr std::size_t section_offset = header_size + load_cmd_size;
+        header->magic      = mh_magic_32;
+        header->cputype    = 0x7;
+        header->cpusubtype = 0x3;
+        header->filetype   = 0x2;
+        header->ncmds      = 1;
+        header->sizeofcmds = static_cast<std::uint32_t>(load_cmd_size);
 
-        // Create Mach-O header
+        auto* segment = reinterpret_cast<SegmentCommand32*>(buf.data() + sizeof(MachHeader32));
-        MachHeader32 header{};
+        segment->cmd      = lc_segment;
-        header.magic = mh_magic_32;
+        segment->cmdsize  = static_cast<std::uint32_t>(load_cmd_size);
-        header.cputype = 0x7;          // CPU_TYPE_X86
+        std::ranges::copy(segment_name, segment->segname);
-        header.cpusubtype = 0x3;       // CPU_SUBTYPE_X86_ALL
+        segment->vmaddr   = 0x1000;
-        header.filetype = 0x2;         // MH_EXECUTE
+        segment->vmsize   = static_cast<std::uint32_t>(section_bytes.size());
-        header.ncmds = 1;
+        segment->fileoff  = static_cast<std::uint32_t>(section_offset);
-        header.sizeofcmds = static_cast<std::uint32_t>(load_cmd_size);
+        segment->filesize = static_cast<std::uint32_t>(section_bytes.size());
-        header.flags = 0;
+        segment->maxprot  = 7;
+        segment->initprot = 5;
+        segment->nsects   = 1;
 
-        f.write(reinterpret_cast<const char*>(&header), sizeof(header));
+        auto* section = reinterpret_cast<Section32*>(buf.data() + sizeof(MachHeader32) + sizeof(SegmentCommand32));
+        std::ranges::copy(section_name, section->sectname);
+        std::ranges::copy(segment_name, section->segname);
+        section->addr   = 0x1000;
+        section->size   = static_cast<std::uint32_t>(section_bytes.size());
+        section->offset = static_cast<std::uint32_t>(section_offset);
 
-        // Create segment command
+        std::memcpy(buf.data() + section_offset, section_bytes.data(), section_bytes.size());
-        SegmentCommand32 segment{};
+        return buf;
-        segment.cmd = lc_segment;
-        segment.cmdsize = static_cast<std::uint32_t>(load_cmd_size);
-        std::ranges::copy(segment_name, segment.segname);
-        segment.vmaddr = 0x1000;
-        segment.vmsize = static_cast<std::uint32_t>(section_bytes.size());
-        segment.fileoff = static_cast<std::uint32_t>(section_offset);
-        segment.filesize = static_cast<std::uint32_t>(section_bytes.size());
-        segment.maxprot = 7;   // VM_PROT_ALL
-        segment.initprot = 5;  // VM_PROT_READ | VM_PROT_EXECUTE
-        segment.nsects = 1;
-        segment.flags = 0;
-
-        f.write(reinterpret_cast<const char*>(&segment), sizeof(segment));
-
-        // Create section
-        Section32 section{};
-        std::ranges::copy(section_name, section.sectname);
-        std::ranges::copy(segment_name, segment.segname);
-        section.addr = 0x1000;
-        section.size = static_cast<std::uint32_t>(section_bytes.size());
-        section.offset = static_cast<std::uint32_t>(section_offset);
-        section.align = 0;
-        section.reloff = 0;
-        section.nreloc = 0;
-        section.flags = 0;
-        section.reserved1 = 0;
-        section.reserved2 = 0;
-
-        f.write(reinterpret_cast<const char*>(&section), sizeof(section));
-
-        // Write section data
-        f.write(reinterpret_cast<const char*>(section_bytes.data()), static_cast<std::streamsize>(section_bytes.size()));
-
-        f.close();
-        return true;
     }
 
 } // namespace
 
-// Test scanning for a pattern that exists in a 64-bit Mach-O file
 TEST(unit_test_macho_pattern_scan_file, ScanFindsPattern64)
 {
-    constexpr std::string_view path = "./test_minimal_macho64.bin";
+    const std::vector<std::uint8_t> bytes = {0x55, 0x48, 0x89, 0xE5, 0x90, 0x90};
-    const std::vector<std::uint8_t> bytes = {0x55, 0x48, 0x89, 0xE5, 0x90, 0x90}; // push rbp; mov rbp, rsp; nop; nop
+    const auto f = MemFdFile::create(build_minimal_macho64(bytes));
-    ASSERT_TRUE(write_minimal_macho64_file(path.data(), bytes));
+    ASSERT_TRUE(f.valid());
 
-    const auto res = MachOPatternScanner::scan_for_pattern_in_file(path, "55 48 89 E5", "__text");
+    const auto res = MachOPatternScanner::scan_for_pattern_in_file(f.path(), "55 48 89 E5", "__text");
     EXPECT_TRUE(res.has_value());
     if (res.has_value())
-    {
         EXPECT_EQ(res->target_offset, 0);
-    }
 }
 
-// Test scanning for a pattern that exists in a 32-bit Mach-O file
 TEST(unit_test_macho_pattern_scan_file, ScanFindsPattern32)
 {
-    constexpr std::string_view path = "./test_minimal_macho32.bin";
+    const std::vector<std::uint8_t> bytes = {0x55, 0x89, 0xE5, 0x90, 0x90};
-    const std::vector<std::uint8_t> bytes = {0x55, 0x89, 0xE5, 0x90, 0x90}; // push ebp; mov ebp, esp; nop; nop
+    const auto f = MemFdFile::create(build_minimal_macho32(bytes));
-    ASSERT_TRUE(write_minimal_macho32_file(path.data(), bytes));
+    ASSERT_TRUE(f.valid());
 
-    const auto res = MachOPatternScanner::scan_for_pattern_in_file(path, "55 89 E5", "__text");
+    const auto res = MachOPatternScanner::scan_for_pattern_in_file(f.path(), "55 89 E5", "__text");
     EXPECT_TRUE(res.has_value());
     if (res.has_value())
-    {
         EXPECT_EQ(res->target_offset, 0);
-    }
 }
 
-// Test scanning for a pattern that does not exist
 TEST(unit_test_macho_pattern_scan_file, ScanMissingPattern)
 {
-    constexpr std::string_view path = "./test_minimal_macho_missing.bin";
     const std::vector<std::uint8_t> bytes = {0x00, 0x01, 0x02, 0x03};
-    ASSERT_TRUE(write_minimal_macho64_file(path.data(), bytes));
+    const auto f = MemFdFile::create(build_minimal_macho64(bytes));
+    ASSERT_TRUE(f.valid());
 
-    const auto res = MachOPatternScanner::scan_for_pattern_in_file(path, "FF EE DD", "__text");
+    const auto res = MachOPatternScanner::scan_for_pattern_in_file(f.path(), "FF EE DD", "__text");
     EXPECT_FALSE(res.has_value());
 }
 
-// Test scanning for a pattern at a non-zero offset
 TEST(unit_test_macho_pattern_scan_file, ScanPatternAtOffset)
 {
-    constexpr std::string_view path = "./test_minimal_macho_offset.bin";
+    const std::vector<std::uint8_t> bytes = {0x90, 0x90, 0x90, 0x55, 0x48, 0x89, 0xE5};
-    const std::vector<std::uint8_t> bytes = {0x90, 0x90, 0x90, 0x55, 0x48, 0x89, 0xE5}; // nops then pattern
+    const auto f = MemFdFile::create(build_minimal_macho64(bytes));
-    ASSERT_TRUE(write_minimal_macho64_file(path.data(), bytes));
+    ASSERT_TRUE(f.valid());
 
-    const auto res = MachOPatternScanner::scan_for_pattern_in_file(path, "55 48 89 E5", "__text");
+    const auto res = MachOPatternScanner::scan_for_pattern_in_file(f.path(), "55 48 89 E5", "__text");
     EXPECT_TRUE(res.has_value());
     if (res.has_value())
-    {
         EXPECT_EQ(res->target_offset, 3);
-    }
 }
 
-// Test scanning with wildcards
 TEST(unit_test_macho_pattern_scan_file, ScanWithWildcard)
 {
-    constexpr std::string_view path = "./test_minimal_macho_wildcard.bin";
     const std::vector<std::uint8_t> bytes = {0x55, 0x48, 0x89, 0xE5, 0x90};
-    ASSERT_TRUE(write_minimal_macho64_file(path.data(), bytes));
+    const auto f = MemFdFile::create(build_minimal_macho64(bytes));
+    ASSERT_TRUE(f.valid());
 
-    const auto res = MachOPatternScanner::scan_for_pattern_in_file(path, "55 ? 89 E5", "__text");
+    const auto res = MachOPatternScanner::scan_for_pattern_in_file(f.path(), "55 ? 89 E5", "__text");
     EXPECT_TRUE(res.has_value());
 }
 
-// Test scanning a non-existent file
 TEST(unit_test_macho_pattern_scan_file, ScanNonExistentFile)
 {
     const auto res = MachOPatternScanner::scan_for_pattern_in_file("/non/existent/file.bin", "55 48", "__text");
     EXPECT_FALSE(res.has_value());
 }
 
-// Test scanning an invalid (non-Mach-O) file
 TEST(unit_test_macho_pattern_scan_file, ScanInvalidFile)
 {
-    constexpr std::string_view path = "./test_invalid_macho.bin";
-    std::ofstream f(path.data(), std::ios::binary);
     const std::vector<std::uint8_t> garbage = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05};
-    f.write(reinterpret_cast<const char*>(garbage.data()), static_cast<std::streamsize>(garbage.size()));
+    const auto f = MemFdFile::create(garbage);
-    f.close();
+    ASSERT_TRUE(f.valid());
 
-    const auto res = MachOPatternScanner::scan_for_pattern_in_file(path, "55 48", "__text");
+    const auto res = MachOPatternScanner::scan_for_pattern_in_file(f.path(), "55 48", "__text");
     EXPECT_FALSE(res.has_value());
 }
 
-// Test scanning for a non-existent section
 TEST(unit_test_macho_pattern_scan_file, ScanNonExistentSection)
 {
-    constexpr std::string_view path = "./test_minimal_macho_nosect.bin";
     const std::vector<std::uint8_t> bytes = {0x55, 0x48, 0x89, 0xE5};
-    ASSERT_TRUE(write_minimal_macho64_file(path.data(), bytes));
+    const auto f = MemFdFile::create(build_minimal_macho64(bytes));
+    ASSERT_TRUE(f.valid());
 
-    const auto res = MachOPatternScanner::scan_for_pattern_in_file(path, "55 48", "__nonexistent");
+    const auto res = MachOPatternScanner::scan_for_pattern_in_file(f.path(), "55 48", "__nonexistent");
     EXPECT_FALSE(res.has_value());
 }
 
-// Test scanning with null module base address
 TEST(unit_test_macho_pattern_scan_loaded, ScanNullModule)
 {
     const auto res = MachOPatternScanner::scan_for_pattern_in_loaded_module(nullptr, "55 48", "__text");
     EXPECT_FALSE(res.has_value());
 }
 
-// Test scanning in loaded module with invalid magic
 TEST(unit_test_macho_pattern_scan_loaded, ScanInvalidMagic)
 {
     std::vector<std::uint8_t> invalid_data(256, 0x00);

tests/general/unit_test_pe_pattern_scan_file.cpp

@@ -1,114 +1,28 @@
 // Unit test for PePatternScanner::scan_for_pattern_in_file using a synthetic PE-like file
 #include <gtest/gtest.h>
 #include <omath/utility/pe_pattern_scan.hpp>
-#include <fstream>
-#include <vector>
 #include <cstdint>
-#include <cstring>
+#include <vector>
+#include "mem_fd_helper.hpp"
 
 using namespace omath;
 
-// Helper: write a trivial PE-like file with DOS header and a single section named .text
-static bool write_minimal_pe_file(const std::string& path, const std::vector<std::uint8_t>& section_bytes)
-{
-    std::ofstream f(path, std::ios::binary);
-    if (!f.is_open()) return false;
-
-    // Write DOS header (e_magic = 0x5A4D, e_lfanew at offset 0x3C)
-    std::vector<std::uint8_t> dos(64, 0);
-    dos[0] = 'M'; dos[1] = 'Z';
-    // e_lfanew -> place NT headers right after DOS (offset 0x80)
-    std::uint32_t e_lfanew = 0x80;
-    std::memcpy(dos.data() + 0x3C, &e_lfanew, sizeof(e_lfanew));
-    f.write(reinterpret_cast<const char*>(dos.data()), dos.size());
-
-    // Pad up to e_lfanew
-    if (f.tellp() < static_cast<std::streampos>(e_lfanew))
-    {
-        std::vector<char> pad(e_lfanew - static_cast<std::uint32_t>(f.tellp()), 0);
-        f.write(pad.data(), pad.size());
-    }
-
-    // NT headers signature 'PE\0\0'
-    f.put('P'); f.put('E'); f.put('\0'); f.put('\0');
-
-    // FileHeader: machine, num_sections
-    std::uint16_t machine = 0x8664; // x64
-    std::uint16_t num_sections = 1;
-    std::uint32_t dummy32 = 0;
-    std::uint32_t dummy32b = 0;
-    std::uint16_t size_optional = 0xF0; // reasonable
-    std::uint16_t characteristics = 0;
-    f.write(reinterpret_cast<const char*>(&machine), sizeof(machine));
-    f.write(reinterpret_cast<const char*>(&num_sections), sizeof(num_sections));
-    f.write(reinterpret_cast<const char*>(&dummy32), sizeof(dummy32));
-    f.write(reinterpret_cast<const char*>(&dummy32b), sizeof(dummy32b));
-    std::uint32_t num_symbols = 0;
-    f.write(reinterpret_cast<const char*>(&num_symbols), sizeof(num_symbols));
-    f.write(reinterpret_cast<const char*>(&size_optional), sizeof(size_optional));
-    f.write(reinterpret_cast<const char*>(&characteristics), sizeof(characteristics));
-
-    // OptionalHeader (x64) minimal: magic 0x20b, image_base, size_of_code, size_of_headers
-    std::uint16_t magic = 0x20b;
-    f.write(reinterpret_cast<const char*>(&magic), sizeof(magic));
-    // filler for rest of optional header up to size_optional
-    std::vector<std::uint8_t> opt(size_optional - sizeof(magic), 0);
-    // set size_code near end
-    // we'll set image_base and size_code fields in reasonable positions for extractor
-    // For simplicity, leave zeros; extractor primarily uses optional_header.image_base and size_code later,
-    // but we will craft a SectionHeader that points to raw data we append below.
-    f.write(reinterpret_cast<const char*>(opt.data()), opt.size());
-
-    // Section header (name 8 bytes, then remaining 36 bytes)
-    char name[8] = {'.','t','e','x','t',0,0,0};
-    f.write(name, 8);
-
-    // Write placeholder bytes for the rest of the section header and remember its start
-    constexpr std::uint32_t section_header_rest = 36u;
-    const std::streampos header_rest_pos = f.tellp();
-    std::vector<char> placeholder(section_header_rest, 0);
-    f.write(placeholder.data(), placeholder.size());
-
-    // Now write section raw data and remember its file offset
-    const std::streampos data_pos = f.tellp();
-    f.write(reinterpret_cast<const char*>(section_bytes.data()), static_cast<std::streamsize>(section_bytes.size()));
-
-    // Patch section header fields: virtual_size, virtual_address, size_raw_data, ptr_raw_data
-    const std::uint32_t virtual_size = static_cast<std::uint32_t>(section_bytes.size());
-    constexpr std::uint32_t virtual_address = 0x1000u;
-    const std::uint32_t size_raw_data = static_cast<std::uint32_t>(section_bytes.size());
-    const std::uint32_t ptr_raw_data = static_cast<std::uint32_t>(data_pos);
-
-    // Seek back to the header_rest_pos and write fields in order
-    f.seekp(header_rest_pos, std::ios::beg);
-    f.write(reinterpret_cast<const char*>(&virtual_size), sizeof(virtual_size));
-    f.write(reinterpret_cast<const char*>(&virtual_address), sizeof(virtual_address));
-    f.write(reinterpret_cast<const char*>(&size_raw_data), sizeof(size_raw_data));
-    f.write(reinterpret_cast<const char*>(&ptr_raw_data), sizeof(ptr_raw_data));
-
-    // Seek back to end for consistency
-    f.seekp(0, std::ios::end);
-
-    f.close();
-    return true;
-}
-
 TEST(unit_test_pe_pattern_scan_file, ScanFindsPattern)
 {
-    constexpr std::string_view path = "./test_minimal_pe.bin";
+    const std::vector<std::uint8_t> bytes = {0x55, 0x8B, 0xEC, 0x90, 0x90};
-    const std::vector<std::uint8_t> bytes = {0x55, 0x8B, 0xEC, 0x90, 0x90}; // pattern at offset 0
+    const auto f = MemFdFile::create(build_minimal_pe(bytes));
-    ASSERT_TRUE(write_minimal_pe_file(path.data(), bytes));
+    ASSERT_TRUE(f.valid());
 
-    const auto res = PePatternScanner::scan_for_pattern_in_file(path, "55 8B EC", ".text");
+    const auto res = PePatternScanner::scan_for_pattern_in_file(f.path(), "55 8B EC", ".text");
     EXPECT_TRUE(res.has_value());
 }
 
 TEST(unit_test_pe_pattern_scan_file, ScanMissingPattern)
 {
-    constexpr std::string_view path = "./test_minimal_pe_2.bin";
     const std::vector<std::uint8_t> bytes = {0x00, 0x01, 0x02, 0x03};
-    ASSERT_TRUE(write_minimal_pe_file(path.data(), bytes));
+    const auto f = MemFdFile::create(build_minimal_pe(bytes));
+    ASSERT_TRUE(f.valid());
 
-    const auto res = PePatternScanner::scan_for_pattern_in_file(path, "FF EE DD", ".text");
+    const auto res = PePatternScanner::scan_for_pattern_in_file(f.path(), "FF EE DD", ".text");
     EXPECT_FALSE(res.has_value());
 }

tests/general/unit_test_pe_pattern_scan_more.cpp

@@ -1,120 +1,89 @@
 // Additional tests for PePatternScanner to exercise edge cases and loaded-module scanning
 #include <cstdint>
 #include <cstring>
-#include <fstream>
 #include <gtest/gtest.h>
 #include <omath/utility/pe_pattern_scan.hpp>
 #include <vector>
+#include "mem_fd_helper.hpp"
 
 using namespace omath;
 
-static bool write_bytes(const std::string& path, const std::vector<std::uint8_t>& data)
-{
-    std::ofstream f(path, std::ios::binary);
-    if (!f.is_open())
-        return false;
-    f.write(reinterpret_cast<const char*>(data.data()), data.size());
-    return true;
-}
-
 TEST(unit_test_pe_pattern_scan_more, InvalidDosHeader)
 {
-    constexpr std::string_view path = "./test_bad_dos.bin";
     std::vector<std::uint8_t> data(128, 0);
-    // write wrong magic
     data[0] = 'N';
     data[1] = 'Z';
-    ASSERT_TRUE(write_bytes(path.data(), data));
+    const auto f = MemFdFile::create(data);
+    ASSERT_TRUE(f.valid());
 
-    const auto res = PePatternScanner::scan_for_pattern_in_file(path, "55 8B EC", ".text");
+    const auto res = PePatternScanner::scan_for_pattern_in_file(f.path(), "55 8B EC", ".text");
     EXPECT_FALSE(res.has_value());
 }
 
 TEST(unit_test_pe_pattern_scan_more, InvalidNtSignature)
 {
-    constexpr std::string_view path = "./test_bad_nt.bin";
     std::vector<std::uint8_t> data(256, 0);
-    // valid DOS header
     data[0] = 'M';
     data[1] = 'Z';
-    // point e_lfanew to 0x80
     constexpr std::uint32_t e_lfanew = 0x80;
     std::memcpy(data.data() + 0x3C, &e_lfanew, sizeof(e_lfanew));
-    // write garbage at e_lfanew (not 'PE\0\0')
     data[e_lfanew + 0] = 'X';
     data[e_lfanew + 1] = 'Y';
     data[e_lfanew + 2] = 'Z';
     data[e_lfanew + 3] = 'W';
-    ASSERT_TRUE(write_bytes(path.data(), data));
+    const auto f = MemFdFile::create(data);
+    ASSERT_TRUE(f.valid());
 
-    const auto res = PePatternScanner::scan_for_pattern_in_file(path, "55 8B EC", ".text");
+    const auto res = PePatternScanner::scan_for_pattern_in_file(f.path(), "55 8B EC", ".text");
     EXPECT_FALSE(res.has_value());
 }
 
 TEST(unit_test_pe_pattern_scan_more, SectionNotFound)
 {
-    // reuse minimal writer but with section named .data and search .text
+    // Minimal PE with a .data section; scanning for .text should fail
-    constexpr std::string_view path = "./test_section_not_found.bin";
+    constexpr std::uint32_t e_lfanew  = 0x80u;
-    std::ofstream f(path.data(), std::ios::binary);
+    constexpr std::uint16_t size_opt  = 0xF0u;
-    ASSERT_TRUE(f.is_open());
+    constexpr std::size_t   nt_off    = e_lfanew;
-    // DOS
+    constexpr std::size_t   fh_off    = nt_off + 4;
-    std::vector<std::uint8_t> dos(64, 0);
+    constexpr std::size_t   oh_off    = fh_off + 20;
-    dos[0] = 'M';
+    constexpr std::size_t   sh_off    = oh_off + size_opt;
-    dos[1] = 'Z';
+    constexpr std::size_t   data_off  = sh_off + 44;
-    std::uint32_t e_lfanew = 0x80;
-    std::memcpy(dos.data() + 0x3C, &e_lfanew, sizeof(e_lfanew));
-    f.write(reinterpret_cast<char*>(dos.data()), dos.size());
-    // pad
-    std::vector<char> pad(e_lfanew - static_cast<std::uint32_t>(f.tellp()), 0);
-    f.write(pad.data(), pad.size());
-    // NT sig
-    f.put('P');
-    f.put('E');
-    f.put('\0');
-    f.put('\0');
-    // FileHeader minimal
-    std::uint16_t machine = 0x8664;
-    std::uint16_t num_sections = 1;
-    std::uint32_t z = 0;
-    std::uint32_t z2 = 0;
-    std::uint32_t numsym = 0;
-    std::uint16_t size_opt = 0xF0;
-    std::uint16_t ch = 0;
-    f.write(reinterpret_cast<char*>(&machine), sizeof(machine));
-    f.write(reinterpret_cast<char*>(&num_sections), sizeof(num_sections));
-    f.write(reinterpret_cast<char*>(&z), sizeof(z));
-    f.write(reinterpret_cast<char*>(&z2), sizeof(z2));
-    f.write(reinterpret_cast<char*>(&numsym), sizeof(numsym));
-    f.write(reinterpret_cast<char*>(&size_opt), sizeof(size_opt));
-    f.write(reinterpret_cast<char*>(&ch), sizeof(ch));
-    // Optional header magic
-    std::uint16_t magic = 0x20b;
-    f.write(reinterpret_cast<char*>(&magic), sizeof(magic));
-    std::vector<std::uint8_t> opt(size_opt - sizeof(magic), 0);
-    f.write(reinterpret_cast<char*>(opt.data()), opt.size());
-    // Section header named .data
-    char name[8] = {'.', 'd', 'a', 't', 'a', 0, 0, 0};
-    f.write(name, 8);
-    std::uint32_t vs = 4, va = 0x1000, srd = 4, prd = 0x200;
-    f.write(reinterpret_cast<char*>(&vs), 4);
-    f.write(reinterpret_cast<char*>(&va), 4);
-    f.write(reinterpret_cast<char*>(&srd), 4);
-    f.write(reinterpret_cast<char*>(&prd), 4);
-    std::vector<char> rest(16, 0);
-    f.write(rest.data(), rest.size());
-    // section bytes
-    std::vector<std::uint8_t> sec = {0x00, 0x01, 0x02, 0x03};
-    f.write(reinterpret_cast<char*>(sec.data()), sec.size());
-    f.close();
 
-    auto res = PePatternScanner::scan_for_pattern_in_file(path, "00 01", ".text");
+    const std::vector<std::uint8_t> sec_data = {0x00, 0x01, 0x02, 0x03};
+    std::vector<std::uint8_t> buf(data_off + sec_data.size(), 0u);
+
+    buf[0] = 'M'; buf[1] = 'Z';
+    std::memcpy(buf.data() + 0x3C, &e_lfanew, 4);
+    buf[nt_off] = 'P'; buf[nt_off + 1] = 'E';
+
+    const std::uint16_t machine = 0x8664u, num_sections = 1u;
+    std::memcpy(buf.data() + fh_off,      &machine,       2);
+    std::memcpy(buf.data() + fh_off + 2,  &num_sections,  2);
+    std::memcpy(buf.data() + fh_off + 16, &size_opt,      2);
+
+    const std::uint16_t magic = 0x20Bu;
+    std::memcpy(buf.data() + oh_off, &magic, 2);
+
+    const char name[8] = {'.','d','a','t','a',0,0,0};
+    std::memcpy(buf.data() + sh_off, name, 8);
+
+    const std::uint32_t vs = 4u, va = 0x1000u, srd = 4u, prd = static_cast<std::uint32_t>(data_off);
+    std::memcpy(buf.data() + sh_off + 8,  &vs,  4);
+    std::memcpy(buf.data() + sh_off + 12, &va,  4);
+    std::memcpy(buf.data() + sh_off + 16, &srd, 4);
+    std::memcpy(buf.data() + sh_off + 20, &prd, 4);
+    std::memcpy(buf.data() + data_off, sec_data.data(), sec_data.size());
+
+    const auto f = MemFdFile::create(buf);
+    ASSERT_TRUE(f.valid());
+
+    const auto res = PePatternScanner::scan_for_pattern_in_file(f.path(), "00 01", ".text");
     EXPECT_FALSE(res.has_value());
 }
 
 TEST(unit_test_pe_pattern_scan_more, LoadedModuleScanFinds)
 {
     // Create an in-memory buffer that mimics loaded module layout
-    // Define local header structs matching those in source
     struct DosHeader
     {
         std::uint16_t e_magic;
@@ -158,9 +127,9 @@ TEST(unit_test_pe_pattern_scan_more, LoadedModuleScanFinds)
         std::uint32_t base_of_code;
         std::uint64_t image_base;
         std::uint32_t section_alignment;
-        std::uint32_t file_alignment; /* rest omitted */
+        std::uint32_t file_alignment;
         std::uint32_t size_image;
-        std::uint32_t size_headers; /* keep space */
+        std::uint32_t size_headers;
         std::uint8_t pad[200];
     };
     struct SectionHeader
@@ -188,44 +157,38 @@ TEST(unit_test_pe_pattern_scan_more, LoadedModuleScanFinds)
     };
 
     const std::vector<std::uint8_t> pattern_bytes = {0xDE, 0xAD, 0xBE, 0xEF, 0x90};
-    constexpr std::uint32_t base_of_code = 0x200; // will place bytes at offset 0x200
+    constexpr std::uint32_t base_of_code = 0x200;
     const std::uint32_t size_code = static_cast<std::uint32_t>(pattern_bytes.size());
 
     const std::uint32_t bufsize = 0x400 + size_code;
     std::vector<std::uint8_t> buf(bufsize, 0);
 
-    // DOS header
     const auto dos = reinterpret_cast<DosHeader*>(buf.data());
-    dos->e_magic = 0x5A4D;
+    dos->e_magic  = 0x5A4D;
     dos->e_lfanew = 0x80;
 
-    // NT headers
     const auto nt = reinterpret_cast<ImageNtHeadersX64*>(buf.data() + dos->e_lfanew);
-    nt->signature = 0x4550; // 'PE\0\0'
+    nt->signature                         = 0x4550;
-    nt->file_header.machine = 0x8664;
+    nt->file_header.machine               = 0x8664;
-    nt->file_header.num_sections = 1;
+    nt->file_header.num_sections          = 1;
-    nt->file_header.size_optional_header = static_cast<std::uint16_t>(sizeof(OptionalHeaderX64));
+    nt->file_header.size_optional_header  = static_cast<std::uint16_t>(sizeof(OptionalHeaderX64));
+    nt->optional_header.magic             = 0x020B;
+    nt->optional_header.base_of_code      = base_of_code;
+    nt->optional_header.size_code         = size_code;
 
-    nt->optional_header.magic = 0x020B; // x64
-    nt->optional_header.base_of_code = base_of_code;
-    nt->optional_header.size_code = size_code;
-
-    // Compute section table offset: e_lfanew + 4 (sig) + FileHeader + OptionalHeader
     const std::size_t section_table_off =
         static_cast<std::size_t>(dos->e_lfanew) + 4 + sizeof(FileHeader) + sizeof(OptionalHeaderX64);
     nt->optional_header.size_headers = static_cast<std::uint32_t>(section_table_off + sizeof(SectionHeader));
 
-    // Section header (.text)
     const auto sect = reinterpret_cast<SectionHeader*>(buf.data() + section_table_off);
     std::memset(sect, 0, sizeof(SectionHeader));
     std::memcpy(sect->name, ".text", 5);
-    sect->virtual_size = size_code;
+    sect->virtual_size    = size_code;
     sect->virtual_address = base_of_code;
-    sect->size_raw_data = size_code;
+    sect->size_raw_data   = size_code;
-    sect->ptr_raw_data = base_of_code;
+    sect->ptr_raw_data    = base_of_code;
-    sect->characteristics = 0x60000020; // code | execute | read
+    sect->characteristics = 0x60000020;
 
-    // place code at base_of_code
     std::memcpy(buf.data() + base_of_code, pattern_bytes.data(), pattern_bytes.size());
 
     const auto res = PePatternScanner::scan_for_pattern_in_loaded_module(buf.data(), "DE AD BE EF", ".text");

tests/general/unit_test_pe_pattern_scan_more2.cpp

@@ -4,6 +4,7 @@
 #include <gtest/gtest.h>
 #include <omath/utility/pe_pattern_scan.hpp>
 #include <vector>
+#include "mem_fd_helper.hpp"
 
 using namespace omath;
 
@@ -19,95 +20,6 @@ struct TestFileHeader
     std::uint16_t characteristics;
 };
 
-static bool write_bytes(const std::string& path, const std::vector<std::uint8_t>& data)
-{
-    std::ofstream f(path, std::ios::binary);
-    if (!f.is_open())
-        return false;
-    f.write(reinterpret_cast<const char*>(data.data()), data.size());
-    return true;
-}
-
-// Helper: write a trivial PE-like file with DOS header and a single section named .text
-static bool write_minimal_pe_file(const std::string& path, const std::vector<std::uint8_t>& section_bytes)
-{
-    std::ofstream f(path, std::ios::binary);
-    if (!f.is_open())
-        return false;
-
-    // Write DOS header (e_magic = 0x5A4D, e_lfanew at offset 0x3C)
-    std::vector<std::uint8_t> dos(64, 0);
-    dos[0] = 'M';
-    dos[1] = 'Z';
-    std::uint32_t e_lfanew = 0x80;
-    std::memcpy(dos.data() + 0x3C, &e_lfanew, sizeof(e_lfanew));
-    f.write(reinterpret_cast<const char*>(dos.data()), dos.size());
-
-    // Pad up to e_lfanew
-    if (f.tellp() < static_cast<std::streampos>(e_lfanew))
-    {
-        std::vector<char> pad(e_lfanew - static_cast<std::uint32_t>(f.tellp()), 0);
-        f.write(pad.data(), pad.size());
-    }
-
-    // NT headers signature 'PE\0\0'
-    f.put('P');
-    f.put('E');
-    f.put('\0');
-    f.put('\0');
-
-    // FileHeader minimal
-    std::uint16_t machine = 0x8664; // x64
-    std::uint16_t num_sections = 1;
-    std::uint32_t dummy32 = 0;
-    std::uint32_t dummy32b = 0;
-    std::uint16_t size_optional = 0xF0;
-    std::uint16_t characteristics = 0;
-    f.write(reinterpret_cast<const char*>(&machine), sizeof(machine));
-    f.write(reinterpret_cast<const char*>(&num_sections), sizeof(num_sections));
-    f.write(reinterpret_cast<const char*>(&dummy32), sizeof(dummy32));
-    f.write(reinterpret_cast<const char*>(&dummy32b), sizeof(dummy32b));
-    std::uint32_t num_symbols = 0;
-    f.write(reinterpret_cast<const char*>(&num_symbols), sizeof(num_symbols));
-    f.write(reinterpret_cast<const char*>(&size_optional), sizeof(size_optional));
-    f.write(reinterpret_cast<const char*>(&characteristics), sizeof(characteristics));
-
-    // OptionalHeader minimal filler
-    std::uint16_t magic = 0x20b;
-    f.write(reinterpret_cast<const char*>(&magic), sizeof(magic));
-    std::vector<std::uint8_t> opt(size_optional - sizeof(magic), 0);
-    f.write(reinterpret_cast<const char*>(opt.data()), opt.size());
-
-    // Section header (name 8 bytes, then remaining 36 bytes)
-    char name[8] = {'.', 't', 'e', 'x', 't', 0, 0, 0};
-    f.write(name, 8);
-
-    constexpr std::uint32_t section_header_rest = 36u;
-    const std::streampos header_rest_pos = f.tellp();
-    std::vector<char> placeholder(section_header_rest, 0);
-    f.write(placeholder.data(), placeholder.size());
-
-    // Now write section raw data and remember its file offset
-    const std::streampos data_pos = f.tellp();
-    f.write(reinterpret_cast<const char*>(section_bytes.data()), static_cast<std::streamsize>(section_bytes.size()));
-
-    // Patch section header fields
-    const std::uint32_t virtual_size = static_cast<std::uint32_t>(section_bytes.size());
-    constexpr std::uint32_t virtual_address = 0x1000u;
-    const std::uint32_t size_raw_data = static_cast<std::uint32_t>(section_bytes.size());
-    const std::uint32_t ptr_raw_data = static_cast<std::uint32_t>(data_pos);
-
-    f.seekp(header_rest_pos, std::ios::beg);
-    f.write(reinterpret_cast<const char*>(&virtual_size), sizeof(virtual_size));
-    f.write(reinterpret_cast<const char*>(&virtual_address), sizeof(virtual_address));
-    f.write(reinterpret_cast<const char*>(&size_raw_data), sizeof(size_raw_data));
-    f.write(reinterpret_cast<const char*>(&ptr_raw_data), sizeof(ptr_raw_data));
-    f.seekp(0, std::ios::end);
-
-    f.close();
-    return true;
-}
-
 TEST(unit_test_pe_pattern_scan_more2, LoadedModuleNullBaseReturnsNull)
 {
     const auto res = PePatternScanner::scan_for_pattern_in_loaded_module(nullptr, "DE AD");
@@ -116,7 +28,6 @@ TEST(unit_test_pe_pattern_scan_more2, LoadedModuleNullBaseReturnsNull)
 
 TEST(unit_test_pe_pattern_scan_more2, LoadedModuleInvalidOptionalHeaderReturnsNull)
 {
-    // Construct in-memory buffer with DOS header but invalid optional header magic
     std::vector<std::uint8_t> buf(0x200, 0);
     struct DosHeader
     {
@@ -128,19 +39,11 @@ TEST(unit_test_pe_pattern_scan_more2, LoadedModuleInvalidOptionalHeaderReturnsNu
     dos->e_magic = 0x5A4D;
     dos->e_lfanew = 0x80;
 
-    // Place an NT header with wrong optional magic at e_lfanew
     const auto nt_ptr = buf.data() + dos->e_lfanew;
-    // write signature
+    nt_ptr[0] = 'P'; nt_ptr[1] = 'E'; nt_ptr[2] = 0; nt_ptr[3] = 0;
-    nt_ptr[0] = 'P';
+
-    nt_ptr[1] = 'E';
-    nt_ptr[2] = 0;
-    nt_ptr[3] = 0;
-    // craft FileHeader with size_optional_header large enough
     constexpr std::uint16_t size_opt = 0xE0;
-    // file header starts at offset 4
+    std::memcpy(nt_ptr + 4 + 12, &size_opt, sizeof(size_opt));
-    std::memcpy(nt_ptr + 4 + 12, &size_opt,
-                sizeof(size_opt)); // size_optional_header located after 12 bytes into FileHeader
-    // write optional header magic to be invalid value
     constexpr std::uint16_t bad_magic = 0x9999;
     std::memcpy(nt_ptr + 4 + sizeof(std::uint32_t) + sizeof(std::uint16_t) + sizeof(std::uint16_t), &bad_magic,
                 sizeof(bad_magic));
@@ -151,13 +54,11 @@ TEST(unit_test_pe_pattern_scan_more2, LoadedModuleInvalidOptionalHeaderReturnsNu
 
 TEST(unit_test_pe_pattern_scan_more2, FileX86OptionalHeaderScanFindsPattern)
 {
-    constexpr std::string_view path = "./test_pe_x86.bin";
     const std::vector<std::uint8_t> pattern = {0xDE, 0xAD, 0xBE, 0xEF};
+    const auto f = MemFdFile::create(build_minimal_pe(pattern));
+    ASSERT_TRUE(f.valid());
 
-    // Use helper from this file to write a consistent minimal PE file with .text section
+    const auto res = PePatternScanner::scan_for_pattern_in_file(f.path(), "DE AD BE EF", ".text");
-    ASSERT_TRUE(write_minimal_pe_file(path.data(), pattern));
-
-    const auto res = PePatternScanner::scan_for_pattern_in_file(path, "DE AD BE EF", ".text");
     ASSERT_TRUE(res.has_value());
     EXPECT_GE(res->virtual_base_addr, 0u);
     EXPECT_GE(res->raw_base_addr, 0u);
@@ -166,97 +67,73 @@ TEST(unit_test_pe_pattern_scan_more2, FileX86OptionalHeaderScanFindsPattern)
 
 TEST(unit_test_pe_pattern_scan_more2, FilePatternNotFoundReturnsNull)
 {
-    const std::string path = "./test_pe_no_pattern.bin";
     std::vector<std::uint8_t> data(512, 0);
-    // minimal DOS/NT headers to make extract_section fail earlier or return empty data
+    data[0] = 'M'; data[1] = 'Z';
-    data[0] = 'M';
-    data[1] = 'Z';
     constexpr std::uint32_t e_lfanew = 0x80;
     std::memcpy(data.data() + 0x3C, &e_lfanew, sizeof(e_lfanew));
-    // NT signature
+    data[e_lfanew + 0] = 'P'; data[e_lfanew + 1] = 'E';
-    data[e_lfanew + 0] = 'P';
+
-    data[e_lfanew + 1] = 'E';
-    data[e_lfanew + 2] = 0;
-    data[e_lfanew + 3] = 0;
-    // FileHeader: one section, size_optional_header set low
     constexpr std::uint16_t num_sections = 1;
     constexpr std::uint16_t size_optional_header = 0xE0;
     std::memcpy(data.data() + e_lfanew + 6, &num_sections, sizeof(num_sections));
     std::memcpy(data.data() + e_lfanew + 4 + 12, &size_optional_header, sizeof(size_optional_header));
-    // Optional header magic x64
+
     constexpr std::uint16_t magic = 0x020B;
     std::memcpy(data.data() + e_lfanew + 4 + sizeof(TestFileHeader), &magic, sizeof(magic));
-    // Section header .text with small data that does not contain the pattern
+
     constexpr std::size_t offset_to_segment_table = e_lfanew + 4 + sizeof(TestFileHeader) + size_optional_header;
     constexpr char name[8] = {'.', 't', 'e', 'x', 't', 0, 0, 0};
     std::memcpy(data.data() + offset_to_segment_table, name, 8);
     std::uint32_t vs = 4, va = 0x1000, srd = 4, prd = 0x200;
-    std::memcpy(data.data() + offset_to_segment_table + 8, &vs, 4);
+    std::memcpy(data.data() + offset_to_segment_table + 8,  &vs,  4);
-    std::memcpy(data.data() + offset_to_segment_table + 12, &va, 4);
+    std::memcpy(data.data() + offset_to_segment_table + 12, &va,  4);
     std::memcpy(data.data() + offset_to_segment_table + 16, &srd, 4);
     std::memcpy(data.data() + offset_to_segment_table + 20, &prd, 4);
-    // write file
-    ASSERT_TRUE(write_bytes(path, data));
 
-    const auto res = PePatternScanner::scan_for_pattern_in_file(path, "AA BB CC", ".text");
+    const auto f = MemFdFile::create(data);
+    ASSERT_TRUE(f.valid());
+
+    const auto res = PePatternScanner::scan_for_pattern_in_file(f.path(), "AA BB CC", ".text");
     EXPECT_FALSE(res.has_value());
 }
-// Extra tests for pe_pattern_scan edge cases (on-disk API)
 
 TEST(PePatternScanMore2, PatternAtStartFound)
 {
-    const std::string path = "./test_pe_more_start.bin";
     const std::vector<std::uint8_t> bytes = {0x90, 0x01, 0x02, 0x03, 0x04};
-    ASSERT_TRUE(write_minimal_pe_file(path, bytes));
+    const auto f = MemFdFile::create(build_minimal_pe(bytes));
+    ASSERT_TRUE(f.valid());
 
-    const auto res = PePatternScanner::scan_for_pattern_in_file(path, "90 01 02", ".text");
+    const auto res = PePatternScanner::scan_for_pattern_in_file(f.path(), "90 01 02", ".text");
     EXPECT_TRUE(res.has_value());
 }
 
 TEST(PePatternScanMore2, PatternAtEndFound)
 {
-    const std::string path = "./test_pe_more_end.bin";
+    const std::vector<std::uint8_t> bytes = {0x00, 0x11, 0x22, 0x33, 0x44};
-    std::vector<std::uint8_t> bytes = {0x00, 0x11, 0x22, 0x33, 0x44};
+    const auto f = MemFdFile::create(build_minimal_pe(bytes));
-    ASSERT_TRUE(write_minimal_pe_file(path, bytes));
+    ASSERT_TRUE(f.valid());
 
-    const auto res = PePatternScanner::scan_for_pattern_in_file(path, "22 33 44", ".text");
+    const auto res = PePatternScanner::scan_for_pattern_in_file(f.path(), "22 33 44", ".text");
     if (!res.has_value())
     {
-        // Try to locate the section header and print the raw section bytes the scanner would read
+        // Debug: inspect section header via the memfd path
-        std::ifstream in(path, std::ios::binary);
+        std::ifstream in(f.path(), std::ios::binary);
-        ASSERT_TRUE(in.is_open());
+        if (in.is_open())
-        // search for ".text" name
-        in.seekg(0, std::ios::beg);
-        std::vector<char> filebuf((std::istreambuf_iterator<char>(in)), std::istreambuf_iterator<char>());
-        const auto it = std::search(filebuf.begin(), filebuf.end(), std::begin(".text"), std::end(".text") - 1);
-        if (it != filebuf.end())
         {
-            const size_t pos = std::distance(filebuf.begin(), it);
+            std::vector<char> filebuf((std::istreambuf_iterator<char>(in)), std::istreambuf_iterator<char>());
-            // after name, next fields: virtual_size (4), virtual_address(4), size_raw_data(4), ptr_raw_data(4)
+            const auto it = std::search(filebuf.begin(), filebuf.end(), std::begin(".text"), std::end(".text") - 1);
-            const size_t meta_off = pos + 8;
+            if (it != filebuf.end())
-            uint32_t virtual_size{};
-            uint32_t virtual_address{};
-            uint32_t size_raw_data{};
-            uint32_t ptr_raw_data{};
-            std::memcpy(&virtual_size, filebuf.data() + meta_off, sizeof(virtual_size));
-            std::memcpy(&virtual_address, filebuf.data() + meta_off + 4, sizeof(virtual_address));
-            std::memcpy(&size_raw_data, filebuf.data() + meta_off + 8, sizeof(size_raw_data));
-            std::memcpy(&ptr_raw_data, filebuf.data() + meta_off + 12, sizeof(ptr_raw_data));
-
-            std::cerr << "Parsed section header: virtual_size=" << virtual_size << " virtual_address=0x" << std::hex
-                      << virtual_address << std::dec << " size_raw_data=" << size_raw_data
-                      << " ptr_raw_data=" << ptr_raw_data << "\n";
-
-            if (ptr_raw_data + size_raw_data <= filebuf.size())
             {
-                std::cerr << "Extracted section bytes:\n";
+                const std::size_t pos = std::distance(filebuf.begin(), it);
-                for (size_t i = 0; i < size_raw_data; i += 16)
+                const std::size_t meta_off = pos + 8;
-                {
+                std::uint32_t virtual_size{}, virtual_address{}, size_raw_data{}, ptr_raw_data{};
-                    std::fprintf(stderr, "%04zx: ", i);
+                std::memcpy(&virtual_size,  filebuf.data() + meta_off,      sizeof(virtual_size));
-                    for (size_t j = 0; j < 16 && i + j < size_raw_data; ++j)
+                std::memcpy(&virtual_address, filebuf.data() + meta_off + 4, sizeof(virtual_address));
-                        std::fprintf(stderr, "%02x ", static_cast<uint8_t>(filebuf[ptr_raw_data + i + j]));
+                std::memcpy(&size_raw_data, filebuf.data() + meta_off + 8,  sizeof(size_raw_data));
-                    std::fprintf(stderr, "\n");
+                std::memcpy(&ptr_raw_data,  filebuf.data() + meta_off + 12, sizeof(ptr_raw_data));
-                }
+                std::cerr << "Parsed section header: virtual_size=" << virtual_size << " virtual_address=0x"
+                          << std::hex << virtual_address << std::dec << " size_raw_data=" << size_raw_data
+                          << " ptr_raw_data=" << ptr_raw_data << "\n";
             }
         }
     }
@@ -265,30 +142,30 @@ TEST(PePatternScanMore2, PatternAtEndFound)
 
 TEST(PePatternScanMore2, WildcardMatches)
 {
-    const std::string path = "./test_pe_more_wild.bin";
     const std::vector<std::uint8_t> bytes = {0xDE, 0xAD, 0xBE, 0xEF};
-    ASSERT_TRUE(write_minimal_pe_file(path, bytes));
+    const auto f = MemFdFile::create(build_minimal_pe(bytes));
+    ASSERT_TRUE(f.valid());
 
-    const auto res = PePatternScanner::scan_for_pattern_in_file(path, "DE ?? BE", ".text");
+    const auto res = PePatternScanner::scan_for_pattern_in_file(f.path(), "DE ?? BE", ".text");
     EXPECT_TRUE(res.has_value());
 }
 
 TEST(PePatternScanMore2, PatternLongerThanBuffer)
 {
-    const std::string path = "./test_pe_more_small.bin";
     const std::vector<std::uint8_t> bytes = {0xAA, 0xBB};
-    ASSERT_TRUE(write_minimal_pe_file(path, bytes));
+    const auto f = MemFdFile::create(build_minimal_pe(bytes));
+    ASSERT_TRUE(f.valid());
 
-    const auto res = PePatternScanner::scan_for_pattern_in_file(path, "AA BB CC", ".text");
+    const auto res = PePatternScanner::scan_for_pattern_in_file(f.path(), "AA BB CC", ".text");
     EXPECT_FALSE(res.has_value());
 }
 
 TEST(PePatternScanMore2, InvalidPatternParse)
 {
-    const std::string path = "./test_pe_more_invalid.bin";
     const std::vector<std::uint8_t> bytes = {0x01, 0x02, 0x03};
-    ASSERT_TRUE(write_minimal_pe_file(path, bytes));
+    const auto f = MemFdFile::create(build_minimal_pe(bytes));
+    ASSERT_TRUE(f.valid());
 
-    const auto res = PePatternScanner::scan_for_pattern_in_file(path, "01 GG 03", ".text");
+    const auto res = PePatternScanner::scan_for_pattern_in_file(f.path(), "01 GG 03", ".text");
     EXPECT_FALSE(res.has_value());
 }

vcpkg.json

@@ -31,7 +31,11 @@
       "dependencies": [
         "glfw3",
         "glew",
-        "opengl"
+        "opengl",
+        {
+          "name": "imgui",
+          "features": ["glfw-binding", "opengl3-binding"]
+        }
       ]
     },
     "imgui": {