add FileSystem::RemoveFile (#2760)

gframe/deck_manager.cpp

@@ -330,15 +330,7 @@ bool DeckManager::SaveDeck(Deck& deck, const wchar_t* file) {
 	return true;
 }
 bool DeckManager::DeleteDeck(const wchar_t* file) {
-#ifdef _WIN32
-	BOOL result = DeleteFileW(file);
-	return !!result;
-#else
-	char filefn[256];
-	BufferIO::EncodeUTF8(file, filefn);
-	int result = unlink(filefn);
-	return result == 0;
-#endif
+	return FileSystem::RemoveFile(file);
 }
 bool DeckManager::CreateCategory(const wchar_t* name) {
 	if(!FileSystem::IsDirExists(L"./deck") && !FileSystem::MakeDir(L"./deck"))

gframe/myfilesystem.h

@@ -86,6 +86,14 @@ public:
 		return DeleteDir(wdir);
 	}
 
+	static bool RemoveFile(const wchar_t* wfile) {
+		return DeleteFileW(wfile);
+	}
+
+	static bool RemoveFile(const char* file) {
+		return DeleteFileA(file);
+	}
+
 	static void TraversalDir(const wchar_t* wpath, const std::function<void(const wchar_t*, bool)>& cb) {
 		wchar_t findstr[1024];
 		std::swprintf(findstr, sizeof findstr / sizeof findstr[0], L"%ls/*", wpath);
@@ -195,6 +203,16 @@ public:
 		return success;
 	}
 
+	static bool RemoveFile(const wchar_t* wfile) {
+		char file[1024];
+		BufferIO::EncodeUTF8(wfile, file);
+		return RemoveFile(file);
+	}
+
+	static bool RemoveFile(const char* file) {
+		return unlink(file) == 0;
+	}
+
 	struct file_unit {
 		std::string filename;
 		bool is_dir;

gframe/replay.cpp

@@ -154,15 +154,7 @@ bool Replay::CheckReplay(const wchar_t* name) {
 bool Replay::DeleteReplay(const wchar_t* name) {
 	wchar_t fname[256];
 	myswprintf(fname, L"./replay/%ls", name);
-#ifdef _WIN32
-	BOOL result = DeleteFileW(fname);
-	return !!result;
-#else
-	char filefn[256];
-	BufferIO::EncodeUTF8(fname, filefn);
-	int result = unlink(filefn);
-	return result == 0;
-#endif
+	return FileSystem::RemoveFile(fname);
 }
 bool Replay::RenameReplay(const wchar_t* oldname, const wchar_t* newname) {
 	wchar_t oldfname[256];