From 3b5eb6f1a456bfcd7313bd532913368791812c0e Mon Sep 17 00:00:00 2001
From: TennesseeTrash <vitosoukup@gmail.com>
Date: Sat, 14 Jun 2025 13:19:47 +0200
Subject: [PATCH] [Megane] Add tiny library to translate utf8 characters to kvg
 code

---
 CMake/gtl.cmake                            | 13 ++++++
 CMake/mio.cmake                            | 13 ++++++
 CMake/simdjson.cmake                       | 13 ++++++
 Libraries/CMakeLists.txt                   |  1 +
 Libraries/Megane/CMakeLists.txt            | 26 ++++++++++++
 Libraries/Megane/Include/Megane/Megane.hpp | 29 +++++++++++++
 Libraries/Megane/Source/Megane.cpp         | 49 ++++++++++++++++++++++
 Tools/KanimajiTool/CMakeLists.txt          |  1 +
 8 files changed, 145 insertions(+)
 create mode 100644 CMake/gtl.cmake
 create mode 100644 CMake/mio.cmake
 create mode 100644 CMake/simdjson.cmake
 create mode 100644 Libraries/Megane/CMakeLists.txt
 create mode 100644 Libraries/Megane/Include/Megane/Megane.hpp
 create mode 100644 Libraries/Megane/Source/Megane.cpp

diff --git a/CMake/gtl.cmake b/CMake/gtl.cmake
new file mode 100644
index 0000000..a1839b2
--- /dev/null
+++ b/CMake/gtl.cmake
@@ -0,0 +1,13 @@
+if(NOT TARGET gtl)
+    include(FetchContent)
+
+    FetchContent_Declare(
+        gtl
+        GIT_REPOSITORY https://code.3011.io/Mirrors/gtl
+        GIT_TAG        v1.2.0
+    )
+
+    FetchContent_MakeAvailable(
+        gtl
+    )
+endif()
diff --git a/CMake/mio.cmake b/CMake/mio.cmake
new file mode 100644
index 0000000..5bddb1a
--- /dev/null
+++ b/CMake/mio.cmake
@@ -0,0 +1,13 @@
+if(NOT TARGET mio)
+    include(FetchContent)
+
+    FetchContent_Declare(
+        mio
+        GIT_REPOSITORY https://code.3011.io/Mirrors/mio
+        GIT_TAG        8b6b7d878c89e81614d05edca7936de41ccdd2da
+    )
+
+    FetchContent_MakeAvailable(
+        mio
+    )
+endif()
diff --git a/CMake/simdjson.cmake b/CMake/simdjson.cmake
new file mode 100644
index 0000000..7bc9fb6
--- /dev/null
+++ b/CMake/simdjson.cmake
@@ -0,0 +1,13 @@
+if(NOT TARGET simdjson)
+    include(FetchContent)
+
+    FetchContent_Declare(
+        simdjson
+        GIT_REPOSITORY https://code.3011.io/Mirrors/simdjson
+        GIT_TAG        v3.13.0
+    )
+
+    FetchContent_MakeAvailable(
+        simdjson
+    )
+endif()
diff --git a/Libraries/CMakeLists.txt b/Libraries/CMakeLists.txt
index 570f2c3..9018b17 100644
--- a/Libraries/CMakeLists.txt
+++ b/Libraries/CMakeLists.txt
@@ -1 +1,2 @@
 add_subdirectory(Kanimaji)
+add_subdirectory(Megane)
diff --git a/Libraries/Megane/CMakeLists.txt b/Libraries/Megane/CMakeLists.txt
new file mode 100644
index 0000000..9a91edc
--- /dev/null
+++ b/Libraries/Megane/CMakeLists.txt
@@ -0,0 +1,26 @@
+include(${PROJECT_SOURCE_DIR}/CMake/gtl.cmake)
+include(${PROJECT_SOURCE_DIR}/CMake/simdjson.cmake)
+
+add_library(Megane STATIC)
+
+target_compile_features(Megane
+    PUBLIC
+    cxx_std_23
+)
+
+target_link_libraries(Megane
+    PRIVATE
+    simdjson
+    PUBLIC
+    gtl
+)
+
+target_include_directories(Megane
+    PUBLIC
+    "Include"
+)
+
+target_sources(Megane
+    PRIVATE
+    "Source/Megane.cpp"
+)
diff --git a/Libraries/Megane/Include/Megane/Megane.hpp b/Libraries/Megane/Include/Megane/Megane.hpp
new file mode 100644
index 0000000..236f6cc
--- /dev/null
+++ b/Libraries/Megane/Include/Megane/Megane.hpp
@@ -0,0 +1,29 @@
+#ifndef MEGANE_MEGANE_HPP
+#define MEGANE_MEGANE_HPP
+
+#include <gtl/phmap.hpp>
+
+#include <stdexcept>
+#include <string>
+
+namespace Megane
+{
+    class Error : public std::runtime_error
+    {
+        using std::runtime_error::runtime_error;
+    };
+
+    class Megane
+    {
+    public:
+        Megane(const std::string& indexPath);
+        ~Megane();
+
+        std::string GetCode(const std::string& character) const;
+
+    private:
+        gtl::flat_hash_map<std::string, std::string> mStorage;
+    };
+}
+
+#endif // MEGANE_MEGANE_HPP
diff --git a/Libraries/Megane/Source/Megane.cpp b/Libraries/Megane/Source/Megane.cpp
new file mode 100644
index 0000000..4b7f8b9
--- /dev/null
+++ b/Libraries/Megane/Source/Megane.cpp
@@ -0,0 +1,49 @@
+#include "Megane/Megane.hpp"
+
+#include <simdjson.h>
+
+#include <print>
+#include <string>
+#include <string_view>
+
+namespace Megane
+{
+    Megane::Megane(const std::string& indexPath)
+    {
+        auto res = simdjson::padded_string::load(indexPath);
+        if (res.error()) {
+            throw Error("Could not load the file");
+        }
+        simdjson::padded_string rawJson = std::move(res.value());
+
+        simdjson::ondemand::parser parser;
+        simdjson::ondemand::document document = parser.iterate(rawJson);
+        for (auto field : document.get_object()) {
+            std::string_view key = field.unescaped_key();
+            std::string_view value;
+            for (auto candidate : field.value()) {
+                if (value.length() == 0) {
+                    value = candidate.value_unsafe().get_string();
+                }
+                else {
+                    std::string_view candidateValue(candidate);
+                    if (candidateValue.length() < value.length()) {
+                        value = candidateValue;
+                    }
+                }
+            }
+            mStorage[std::string(key)] = value;
+        }
+    }
+
+    Megane::~Megane() = default;
+
+    std::string Megane::GetCode(const std::string& character) const
+    {
+        auto it = mStorage.find(character);
+        if (it == mStorage.end()) {
+            throw Error("Failed to find the provided character");
+        }
+        return it->second;
+    }
+}
diff --git a/Tools/KanimajiTool/CMakeLists.txt b/Tools/KanimajiTool/CMakeLists.txt
index d194754..3724680 100644
--- a/Tools/KanimajiTool/CMakeLists.txt
+++ b/Tools/KanimajiTool/CMakeLists.txt
@@ -8,6 +8,7 @@ target_compile_features(KanimajiTool
 target_link_libraries(KanimajiTool
     PRIVATE
     Kanimaji
+    Megane
 )
 
 target_sources(KanimajiTool