feat: update IO helper.

- add utf8 path to std::filesystem::path convertion function.
- add left-padding zero format string for printing pointer.
- update exception handler, but not finished because console helper need update.

src/IOHelper.cpp

@@ -1,25 +1,22 @@
 #include "IOHelper.hpp"
-#if YYCC_OS == YYCC_OS_WINDOWS
 
 #include "EncodingHelper.hpp"
 #include <cstdio>
 #include <iostream>
 #include <string>
+#include <stdexcept>
 
+#if YYCC_OS == YYCC_OS_WINDOWS
 #include "WinImportPrefix.hpp"
 #include <Windows.h>
-#include <io.h>
-#include <fcntl.h>
 #include "WinImportSuffix.hpp"
+#endif
 
 namespace YYCC::IOHelper {
 
-	bool futf8(FILE* fs) {
-		// https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/setmode?view=msvc-170
-		return _setmode(_fileno(fs), _O_U8TEXT) != -1;
-	}
+	FILE* UTF8FOpen(const char* u8_filepath, const char* u8_mode) {
+#if YYCC_OS == YYCC_OS_WINDOWS
 
-	FILE* fopen(const char* u8_filepath, const char* u8_mode) {
 		// convert mode and file path to wchar
 		std::wstring wmode, wpath;
 		if (!YYCC::EncodingHelper::UTF8ToWchar(u8_mode, wmode))
@@ -29,8 +26,28 @@ namespace YYCC::IOHelper {
 
 		// call microsoft specified fopen which support wchar as argument.
 		return _wfopen(wpath.c_str(), wmode.c_str());
+
+#else
+		return std::fopen(u8_filepath, u8_mode);
+#endif
 	}
 
+	std::filesystem::path UTF8Path(const char* u8_path) {
+#if YYCC_OS == YYCC_OS_WINDOWS
+
+		// convert path to wchar
+		std::wstring wpath;
+		if (!YYCC::EncodingHelper::UTF8ToWchar(u8_path, wpath))
+			throw std::invalid_argument("Fail to convert given UTF8 string.");
+
+		// call microsoft specified fopen which support wchar as argument.
+		return std::filesystem::path(wpath);
+
+#else
+		return std::filesystem::path(u8_path);
+#endif
+	}
+
+
 }
 
-#endif