# HG changeset patch
# User Michael Lutz <michi@icosahedron.de>
# Date 2020-12-06 20:11:50
# Node ID 3dec691db49ae7ca0452087d4062799f2848f70d
# Parent  a7298f737f008a2e23da9604bf5aad150a5aeef4

Codechange: Use std::string in file scanners.

diff --git a/src/ai/ai_scanner.cpp b/src/ai/ai_scanner.cpp
--- a/src/ai/ai_scanner.cpp
+++ b/src/ai/ai_scanner.cpp
@@ -32,8 +32,7 @@ void AIScannerInfo::Initialize()
 	ScriptAllocatorScope alloc_scope(this->engine);
 
 	/* Create the dummy AI */
-	free(this->main_script);
-	this->main_script = stredup("%_dummy");
+	this->main_script = "%_dummy";
 	extern void Script_CreateDummyInfo(HSQUIRRELVM vm, const char *type, const char *dir);
 	Script_CreateDummyInfo(this->engine->GetVM(), "AI", "ai");
 }
diff --git a/src/base_media_base.h b/src/base_media_base.h
--- a/src/base_media_base.h
+++ b/src/base_media_base.h
@@ -167,7 +167,7 @@ protected:
 	static Tbase_set *duplicate_sets; ///< All sets that aren't available, but needed for not downloading base sets when a newer version than the one on BaNaNaS is loaded.
 	static const Tbase_set *used_set; ///< The currently used set
 
-	bool AddFile(const char *filename, size_t basepath_length, const char *tar_filename) override;
+	bool AddFile(const std::string &filename, size_t basepath_length, const std::string &tar_filename) override;
 
 	/**
 	 * Get the extension that is used to identify this set.
diff --git a/src/base_media_func.h b/src/base_media_func.h
--- a/src/base_media_func.h
+++ b/src/base_media_func.h
@@ -150,14 +150,14 @@ bool BaseSet<T, Tnum_files, Tsearch_in_t
 }
 
 template <class Tbase_set>
-bool BaseMedia<Tbase_set>::AddFile(const char *filename, size_t basepath_length, const char *tar_filename)
+bool BaseMedia<Tbase_set>::AddFile(const std::string &filename, size_t basepath_length, const std::string &tar_filename)
 {
 	bool ret = false;
-	DEBUG(grf, 1, "Checking %s for base " SET_TYPE " set", filename);
+	DEBUG(grf, 1, "Checking %s for base " SET_TYPE " set", filename.c_str());
 
 	Tbase_set *set = new Tbase_set();
 	IniFile *ini = new IniFile();
-	std::string path{ filename + basepath_length };
+	std::string path{ filename, basepath_length };
 	ini->LoadFromDisk(path, BASESET_DIR);
 
 	auto psep = path.rfind(PATHSEPCHAR);
@@ -167,7 +167,7 @@ bool BaseMedia<Tbase_set>::AddFile(const
 		path.clear();
 	}
 
-	if (set->FillSetDetails(ini, path.c_str(), filename)) {
+	if (set->FillSetDetails(ini, path.c_str(), filename.c_str())) {
 		Tbase_set *duplicate = nullptr;
 		for (Tbase_set *c = BaseMedia<Tbase_set>::available_sets; c != nullptr; c = c->next) {
 			if (c->name == set->name || c->shortname == set->shortname) {
@@ -377,7 +377,7 @@ template <class Tbase_set>
 #define INSTANTIATE_BASE_MEDIA_METHODS(repl_type, set_type) \
 	template std::string repl_type::ini_set; \
 	template const char *repl_type::GetExtension(); \
-	template bool repl_type::AddFile(const char *filename, size_t pathlength, const char *tar_filename); \
+	template bool repl_type::AddFile(const std::string &filename, size_t pathlength, const std::string &tar_filename); \
 	template bool repl_type::HasSet(const struct ContentInfo *ci, bool md5sum); \
 	template bool repl_type::SetSet(const std::string &name); \
 	template char *repl_type::GetSetsList(char *p, const char *last); \
diff --git a/src/fileio.cpp b/src/fileio.cpp
--- a/src/fileio.cpp
+++ b/src/fileio.cpp
@@ -246,7 +246,7 @@ static_assert(lengthof(_subdirs) == NUM_
  * current operating system.
  */
 std::array<std::string, NUM_SEARCHPATHS> _searchpaths;
-TarList _tar_list[NUM_SUBDIRS];
+std::array<TarList, NUM_SUBDIRS> _tar_list;
 TarFileList _tar_filelist[NUM_SUBDIRS];
 
 typedef std::map<std::string, std::string> TarLinkList;
@@ -390,7 +390,7 @@ static FILE *FioFOpenFileSp(const std::s
  */
 FILE *FioFOpenFileTar(const TarFileListEntry &entry, size_t *filesize)
 {
-	FILE *f = fopen(entry.tar_filename, "rb");
+	FILE *f = fopen(entry.tar_filename.c_str(), "rb");
 	if (f == nullptr) return f;
 
 	if (fseek(f, entry.position, SEEK_SET) < 0) {
@@ -613,16 +613,16 @@ uint TarScanner::DoScan(Subdirectory sd)
  * @param filename The name of the file to add.
  * @return True if the additions went correctly.
  */
-bool TarScanner::AddFile(Subdirectory sd, const char *filename)
+bool TarScanner::AddFile(Subdirectory sd, const std::string &filename)
 {
 	this->subdir = sd;
 	return this->AddFile(filename, 0);
 }
 
-bool TarScanner::AddFile(const char *filename, size_t basepath_length, const char *tar_filename)
+bool TarScanner::AddFile(const std::string &filename, size_t basepath_length, const std::string &tar_filename)
 {
 	/* No tar within tar. */
-	assert(tar_filename == nullptr);
+	assert(tar_filename.empty());
 
 	/* The TAR-header, repeated for every file */
 	struct TarHeader {
@@ -650,16 +650,14 @@ bool TarScanner::AddFile(const char *fil
 	TarList::iterator it = _tar_list[this->subdir].find(filename);
 	if (it != _tar_list[this->subdir].end()) return false;
 
-	FILE *f = fopen(filename, "rb");
+	FILE *f = fopen(filename.c_str(), "rb");
 	/* Although the file has been found there can be
 	 * a number of reasons we cannot open the file.
 	 * Most common case is when we simply have not
 	 * been given read access. */
 	if (f == nullptr) return false;
 
-	const char *dupped_filename = stredup(filename);
-	_tar_list[this->subdir][filename].filename = dupped_filename;
-	_tar_list[this->subdir][filename].dirname = nullptr;
+	_tar_list[this->subdir][filename] = std::string{};
 
 	TarLinkList links; ///< Temporary list to collect links
 
@@ -684,7 +682,7 @@ bool TarScanner::AddFile(const char *fil
 			/* If we have only zeros in the block, it can be an end-of-file indicator */
 			if (memcmp(&th, &empty[0], 512) == 0) continue;
 
-			DEBUG(misc, 0, "The file '%s' isn't a valid tar-file", filename);
+			DEBUG(misc, 0, "The file '%s' isn't a valid tar-file", filename.c_str());
 			fclose(f);
 			return false;
 		}
@@ -714,7 +712,7 @@ bool TarScanner::AddFile(const char *fil
 
 				/* Store this entry in the list */
 				TarFileListEntry entry;
-				entry.tar_filename = dupped_filename;
+				entry.tar_filename = filename;
 				entry.size         = skip;
 				entry.position     = pos;
 
@@ -782,7 +780,7 @@ bool TarScanner::AddFile(const char *fil
 					}
 
 					if (destpos >= lastof(dest)) {
-						DEBUG(misc, 0, "The length of a link in tar-file '%s' is too large (malformed?)", filename);
+						DEBUG(misc, 0, "The length of a link in tar-file '%s' is too large (malformed?)", filename.c_str());
 						fclose(f);
 						return false;
 					}
@@ -803,7 +801,7 @@ bool TarScanner::AddFile(const char *fil
 
 				/* Store the first directory name we detect */
 				DEBUG(misc, 6, "Found dir in tar: %s", name);
-				if (_tar_list[this->subdir][filename].dirname == nullptr) _tar_list[this->subdir][filename].dirname = stredup(name);
+				if (_tar_list[this->subdir][filename].empty()) _tar_list[this->subdir][filename] = name;
 				break;
 
 			default:
@@ -814,14 +812,14 @@ bool TarScanner::AddFile(const char *fil
 		/* Skip to the next block.. */
 		skip = Align(skip, 512);
 		if (fseek(f, skip, SEEK_CUR) < 0) {
-			DEBUG(misc, 0, "The file '%s' can't be read as a valid tar-file", filename);
+			DEBUG(misc, 0, "The file '%s' can't be read as a valid tar-file", filename.c_str());
 			fclose(f);
 			return false;
 		}
 		pos += skip;
 	}
 
-	DEBUG(misc, 1, "Found tar '%s' with " PRINTF_SIZE " new files", filename, num);
+	DEBUG(misc, 1, "Found tar '%s' with " PRINTF_SIZE " new files", filename.c_str(), num);
 	fclose(f);
 
 	/* Resolve file links and store directory links.
@@ -855,10 +853,10 @@ bool ExtractTar(const std::string &tar_f
 	/* We don't know the file. */
 	if (it == _tar_list[subdir].end()) return false;
 
-	const char *dirname = (*it).second.dirname;
+	const auto &dirname = (*it).second;
 
 	/* The file doesn't have a sub directory! */
-	if (dirname == nullptr) {
+	if (dirname.empty()) {
 		DEBUG(misc, 1, "Extracting %s failed; archive rejected, the contents must be in a sub directory", tar_filename.c_str());
 		return false;
 	}
@@ -1308,7 +1306,7 @@ static uint ScanPath(FileScanner *fs, co
 			num += ScanPath(fs, extension, filename.c_str(), basepath_length, recursive);
 		} else if (S_ISREG(sb.st_mode)) {
 			/* File */
-			if (MatchesExtension(extension, filename.c_str()) && fs->AddFile(filename.c_str(), basepath_length, nullptr)) num++;
+			if (MatchesExtension(extension, filename.c_str()) && fs->AddFile(filename, basepath_length, {})) num++;
 		}
 	}
 
@@ -1326,9 +1324,9 @@ static uint ScanPath(FileScanner *fs, co
 static uint ScanTar(FileScanner *fs, const char *extension, TarFileList::iterator tar)
 {
 	uint num = 0;
-	const char *filename = (*tar).first.c_str();
+	const auto &filename = (*tar).first;
 
-	if (MatchesExtension(extension, filename) && fs->AddFile(filename, 0, (*tar).second.tar_filename)) num++;
+	if (MatchesExtension(extension, filename.c_str()) && fs->AddFile(filename, 0, (*tar).second.tar_filename)) num++;
 
 	return num;
 }
diff --git a/src/fileio_func.h b/src/fileio_func.h
--- a/src/fileio_func.h
+++ b/src/fileio_func.h
@@ -74,7 +74,7 @@ public:
 	 * @param tar_filename    the name of the tar file the file is read from.
 	 * @return true if the file is added.
 	 */
-	virtual bool AddFile(const char *filename, size_t basepath_length, const char *tar_filename) = 0;
+	virtual bool AddFile(const std::string &filename, size_t basepath_length, const std::string &tar_filename) = 0;
 };
 
 /** Helper for scanning for files with tar as extension */
@@ -92,9 +92,9 @@ public:
 		ALL      = BASESET | NEWGRF | AI | SCENARIO | GAME, ///< Scan for everything.
 	};
 
-	bool AddFile(const char *filename, size_t basepath_length, const char *tar_filename = nullptr) override;
+	bool AddFile(const std::string &filename, size_t basepath_length, const std::string &tar_filename = nullptr) override;
 
-	bool AddFile(Subdirectory sd, const char *filename);
+	bool AddFile(Subdirectory sd, const std::string &filename);
 
 	/** Do the scan for Tars. */
 	static uint DoScan(TarScanner::Mode mode);
diff --git a/src/fios.cpp b/src/fios.cpp
--- a/src/fios.cpp
+++ b/src/fios.cpp
@@ -42,7 +42,7 @@ extern void FiosGetDrives(FileList &file
 extern bool FiosGetDiskFreeSpace(const char *path, uint64 *tot);
 
 /* get the name of an oldstyle savegame */
-extern void GetOldSaveGameName(const char *file, char *title, const char *last);
+extern void GetOldSaveGameName(const std::string &file, char *title, const char *last);
 
 /**
  * Compare two FiosItem's. Used with sort when sorting the file list.
@@ -260,7 +260,7 @@ bool FiosDelete(const char *name)
 	return unlink(filename.c_str()) == 0;
 }
 
-typedef FiosType fios_getlist_callback_proc(SaveLoadOperation fop, const char *filename, const char *ext, char *title, const char *last);
+typedef FiosType fios_getlist_callback_proc(SaveLoadOperation fop, const std::string &filename, const char *ext, char *title, const char *last);
 
 /**
  * Scanner to scan for a particular type of FIOS file.
@@ -280,7 +280,7 @@ public:
 			fop(fop), callback_proc(callback_proc), file_list(file_list)
 	{}
 
-	bool AddFile(const char *filename, size_t basepath_length, const char *tar_filename) override;
+	bool AddFile(const std::string &filename, size_t basepath_length, const std::string &tar_filename) override;
 };
 
 /**
@@ -289,25 +289,26 @@ public:
  * @param basepath_length amount of characters to chop of before to get a relative filename
  * @return true if the file is added.
  */
-bool FiosFileScanner::AddFile(const char *filename, size_t basepath_length, const char *tar_filename)
+bool FiosFileScanner::AddFile(const std::string &filename, size_t basepath_length, const std::string &tar_filename)
 {
-	const char *ext = strrchr(filename, '.');
-	if (ext == nullptr) return false;
+	auto sep = filename.rfind('.');
+	if (sep == std::string::npos) return false;
+	std::string ext = filename.substr(sep);
 
 	char fios_title[64];
 	fios_title[0] = '\0'; // reset the title;
 
-	FiosType type = this->callback_proc(this->fop, filename, ext, fios_title, lastof(fios_title));
+	FiosType type = this->callback_proc(this->fop, filename, ext.c_str(), fios_title, lastof(fios_title));
 	if (type == FIOS_TYPE_INVALID) return false;
 
 	for (const FiosItem *fios = file_list.Begin(); fios != file_list.End(); fios++) {
-		if (strcmp(fios->name, filename) == 0) return false;
+		if (filename == fios->name) return false;
 	}
 
 	FiosItem *fios = file_list.Append();
 #ifdef _WIN32
 	// Retrieve the file modified date using GetFileTime rather than stat to work around an obscure MSVC bug that affects Windows XP
-	HANDLE fh = CreateFile(OTTD2FS(filename), GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, nullptr, OPEN_EXISTING, 0, nullptr);
+	HANDLE fh = CreateFile(OTTD2FS(filename.c_str()), GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, nullptr, OPEN_EXISTING, 0, nullptr);
 
 	if (fh != INVALID_HANDLE_VALUE) {
 		FILETIME ft;
@@ -326,7 +327,7 @@ bool FiosFileScanner::AddFile(const char
 		CloseHandle(fh);
 #else
 	struct stat sb;
-	if (stat(filename, &sb) == 0) {
+	if (stat(filename.c_str(), &sb) == 0) {
 		fios->mtime = sb.st_mtime;
 #endif
 	} else {
@@ -334,13 +335,13 @@ bool FiosFileScanner::AddFile(const char
 	}
 
 	fios->type = type;
-	strecpy(fios->name, filename, lastof(fios->name));
+	strecpy(fios->name, filename.c_str(), lastof(fios->name));
 
 	/* If the file doesn't have a title, use its filename */
 	const char *t = fios_title;
 	if (StrEmpty(fios_title)) {
-		t = strrchr(filename, PATHSEPCHAR);
-		t = (t == nullptr) ? filename : (t + 1);
+		auto ps = filename.rfind(PATHSEPCHAR);
+		t = filename.c_str() + (ps == std::string::npos ? 0 : ps + 1);
 	}
 	strecpy(fios->title, t, lastof(fios->title));
 	str_validate(fios->title, lastof(fios->title));
@@ -433,11 +434,10 @@ static void FiosGetFileList(SaveLoadOper
  * @param last the last element in the title buffer
  * @param subdir the sub directory to search in
  */
-static void GetFileTitle(const char *file, char *title, const char *last, Subdirectory subdir)
+static void GetFileTitle(const std::string &file, char *title, const char *last, Subdirectory subdir)
 {
-	char buf[MAX_PATH];
-	strecpy(buf, file, lastof(buf));
-	strecat(buf, ".title", lastof(buf));
+	std::string buf = file;
+	buf += ".title";
 
 	FILE *f = FioFOpenFile(buf, "r", subdir);
 	if (f == nullptr) return;
@@ -460,7 +460,7 @@ static void GetFileTitle(const char *fil
  * @see FiosGetFileList
  * @see FiosGetSavegameList
  */
-FiosType FiosGetSavegameListCallback(SaveLoadOperation fop, const char *file, const char *ext, char *title, const char *last)
+FiosType FiosGetSavegameListCallback(SaveLoadOperation fop, const std::string &file, const char *ext, char *title, const char *last)
 {
 	/* Show savegame files
 	 * .SAV OpenTTD saved game
@@ -515,7 +515,7 @@ void FiosGetSavegameList(SaveLoadOperati
  * @see FiosGetFileList
  * @see FiosGetScenarioList
  */
-static FiosType FiosGetScenarioListCallback(SaveLoadOperation fop, const char *file, const char *ext, char *title, const char *last)
+static FiosType FiosGetScenarioListCallback(SaveLoadOperation fop, const std::string &file, const char *ext, char *title, const char *last)
 {
 	/* Show scenario files
 	 * .SCN OpenTTD style scenario file
@@ -556,7 +556,7 @@ void FiosGetScenarioList(SaveLoadOperati
 	FiosGetFileList(fop, &FiosGetScenarioListCallback, subdir, file_list);
 }
 
-static FiosType FiosGetHeightmapListCallback(SaveLoadOperation fop, const char *file, const char *ext, char *title, const char *last)
+static FiosType FiosGetHeightmapListCallback(SaveLoadOperation fop, const std::string &file, const char *ext, char *title, const char *last)
 {
 	/* Show heightmap files
 	 * .PNG PNG Based heightmap files
@@ -669,7 +669,7 @@ public:
 		this->scanned = true;
 	}
 
-	bool AddFile(const char *filename, size_t basepath_length, const char *tar_filename) override
+	bool AddFile(const std::string &filename, size_t basepath_length, const std::string &tar_filename) override
 	{
 		FILE *f = FioFOpenFile(filename, "r", SCENARIO_DIR);
 		if (f == nullptr) return false;
@@ -678,19 +678,16 @@ public:
 		int fret = fscanf(f, "%u", &id.scenid);
 		FioFCloseFile(f);
 		if (fret != 1) return false;
-		strecpy(id.filename, filename, lastof(id.filename));
+		strecpy(id.filename, filename.c_str(), lastof(id.filename));
 
 		Md5 checksum;
 		uint8 buffer[1024];
-		char basename[MAX_PATH]; ///< \a filename without the extension.
 		size_t len, size;
 
 		/* open the scenario file, but first get the name.
 		 * This is safe as we check on extension which
 		 * must always exist. */
-		strecpy(basename, filename, lastof(basename));
-		*strrchr(basename, '.') = '\0';
-		f = FioFOpenFile(basename, "rb", SCENARIO_DIR, &size);
+		f = FioFOpenFile(filename.substr(0, filename.rfind('.')), "rb", SCENARIO_DIR, &size);
 		if (f == nullptr) return false;
 
 		/* calculate md5sum */
diff --git a/src/fios.h b/src/fios.h
--- a/src/fios.h
+++ b/src/fios.h
@@ -223,6 +223,6 @@ bool FiosDelete(const char *name);
 std::string FiosMakeHeightmapName(const char *name);
 std::string FiosMakeSavegameName(const char *name);
 
-FiosType FiosGetSavegameListCallback(SaveLoadOperation fop, const char *file, const char *ext, char *title, const char *last);
+FiosType FiosGetSavegameListCallback(SaveLoadOperation fop, const std::string &file, const char *ext, char *title, const char *last);
 
 #endif /* FIOS_H */
diff --git a/src/game/game_text.cpp b/src/game/game_text.cpp
--- a/src/game/game_text.cpp
+++ b/src/game/game_text.cpp
@@ -206,7 +206,7 @@ public:
 		this->FileScanner::Scan(".txt", directory, false);
 	}
 
-	bool AddFile(const char *filename, size_t basepath_length, const char *tar_filename) override
+	bool AddFile(const std::string &filename, size_t basepath_length, const std::string &tar_filename) override
 	{
 		if (exclude == filename) return true;
 
@@ -244,9 +244,9 @@ GameStrings *LoadTranslations()
 		LanguageScanner scanner(gs, filename);
 		std::string ldir = basename + "lang" PATHSEP;
 
-		const char *tar_filename = info->GetTarFile();
+		const std::string tar_filename = info->GetTarFile();
 		TarList::iterator iter;
-		if (tar_filename != nullptr && (iter = _tar_list[GAME_DIR].find(tar_filename)) != _tar_list[GAME_DIR].end()) {
+		if (!tar_filename.empty() && (iter = _tar_list[GAME_DIR].find(tar_filename)) != _tar_list[GAME_DIR].end()) {
 			/* The main script is in a tar file, so find all files that
 			 * are in the same tar and add them to the langfile scanner. */
 			TarFileList::iterator tar;
@@ -258,7 +258,7 @@ GameStrings *LoadTranslations()
 				if (tar->first.size() <= ldir.size() || tar->first.compare(0, ldir.size(), ldir) != 0) continue;
 				if (tar->first.compare(tar->first.size() - 4, 4, ".txt") != 0) continue;
 
-				scanner.AddFile(tar->first.c_str(), 0, tar_filename);
+				scanner.AddFile(tar->first, 0, tar_filename);
 			}
 		} else {
 			/* Scan filesystem */
diff --git a/src/newgrf_config.cpp b/src/newgrf_config.cpp
--- a/src/newgrf_config.cpp
+++ b/src/newgrf_config.cpp
@@ -586,7 +586,7 @@ public:
 	{
 	}
 
-	bool AddFile(const char *filename, size_t basepath_length, const char *tar_filename) override;
+	bool AddFile(const std::string &filename, size_t basepath_length, const std::string &tar_filename) override;
 
 	/** Do the scan for GRFs. */
 	static uint DoScan()
@@ -600,9 +600,9 @@ public:
 	}
 };
 
-bool GRFFileScanner::AddFile(const char *filename, size_t basepath_length, const char *tar_filename)
+bool GRFFileScanner::AddFile(const std::string &filename, size_t basepath_length, const std::string &tar_filename)
 {
-	GRFConfig *c = new GRFConfig(filename + basepath_length);
+	GRFConfig *c = new GRFConfig(filename.c_str() + basepath_length);
 
 	bool added = true;
 	if (FillGRFDetails(c, false)) {
diff --git a/src/openttd.cpp b/src/openttd.cpp
--- a/src/openttd.cpp
+++ b/src/openttd.cpp
@@ -628,7 +628,7 @@ int openttd_main(int argc, char *argv[])
 				/* if the file doesn't exist or it is not a valid savegame, let the saveload code show an error */
 				auto t = _file_to_saveload.name.find_last_of('.');
 				if (t != std::string::npos) {
-					FiosType ft = FiosGetSavegameListCallback(SLO_LOAD, _file_to_saveload.name.c_str(), _file_to_saveload.name.substr(t).c_str(), nullptr, nullptr);
+					FiosType ft = FiosGetSavegameListCallback(SLO_LOAD, _file_to_saveload.name, _file_to_saveload.name.substr(t).c_str(), nullptr, nullptr);
 					if (ft != FIOS_TYPE_INVALID) _file_to_saveload.SetMode(ft);
 				}
 
diff --git a/src/saveload/oldloader.cpp b/src/saveload/oldloader.cpp
--- a/src/saveload/oldloader.cpp
+++ b/src/saveload/oldloader.cpp
@@ -317,7 +317,7 @@ bool LoadOldSaveGame(const std::string &
 	return true;
 }
 
-void GetOldSaveGameName(const char *file, char *title, const char *last)
+void GetOldSaveGameName(const std::string &file, char *title, const char *last)
 {
 	FILE *f = FioFOpenFile(file, "rb", NO_DIRECTORY);
 
diff --git a/src/script/script_info.cpp b/src/script/script_info.cpp
--- a/src/script/script_info.cpp
+++ b/src/script/script_info.cpp
@@ -39,8 +39,6 @@ ScriptInfo::~ScriptInfo()
 	free(this->date);
 	free(this->instance_name);
 	free(this->url);
-	free(this->main_script);
-	free(this->tar_file);
 	free(this->SQ_instance);
 }
 
@@ -81,9 +79,8 @@ bool ScriptInfo::CheckMethod(const char 
 	}
 
 	/* Get location information of the scanner */
-	info->main_script = stredup(info->scanner->GetMainScript());
-	const char *tar_name = info->scanner->GetTarFile();
-	if (tar_name != nullptr) info->tar_file = stredup(tar_name);
+	info->main_script = info->scanner->GetMainScript();
+	info->tar_file = info->scanner->GetTarFile();
 
 	/* Cache the data the info file gives us. */
 	if (!info->engine->CallStringMethodStrdup(*info->SQ_instance, "GetAuthor", &info->author, MAX_GET_OPS)) return SQ_ERROR;
diff --git a/src/script/script_info.hpp b/src/script/script_info.hpp
--- a/src/script/script_info.hpp
+++ b/src/script/script_info.hpp
@@ -32,8 +32,6 @@ public:
 	ScriptInfo() :
 		engine(nullptr),
 		SQ_instance(nullptr),
-		main_script(nullptr),
-		tar_file(nullptr),
 		author(nullptr),
 		name(nullptr),
 		short_name(nullptr),
@@ -89,12 +87,12 @@ public:
 	/**
 	 * Get the filename of the main.nut script.
 	 */
-	const char *GetMainScript() const { return this->main_script; }
+	const char *GetMainScript() const { return this->main_script.c_str(); }
 
 	/**
 	 * Get the filename of the tar the script is in.
 	 */
-	const char *GetTarFile() const { return this->tar_file; }
+	std::string GetTarFile() const { return this->tar_file; }
 
 	/**
 	 * Check if a given method exists.
@@ -152,8 +150,8 @@ protected:
 	ScriptConfigItemList config_list; ///< List of settings from this Script.
 
 private:
-	char *main_script;            ///< The full path of the script.
-	char *tar_file;               ///< If, which tar file the script was in.
+	std::string main_script;      ///< The full path of the script.
+	std::string tar_file;         ///< If, which tar file the script was in.
 	const char *author;           ///< Author of the script.
 	const char *name;             ///< Full name of the script.
 	const char *short_name;       ///< Short name (4 chars) which uniquely identifies the script.
diff --git a/src/script/script_scanner.cpp b/src/script/script_scanner.cpp
--- a/src/script/script_scanner.cpp
+++ b/src/script/script_scanner.cpp
@@ -23,47 +23,29 @@
 
 #include "../safeguards.h"
 
-bool ScriptScanner::AddFile(const char *filename, size_t basepath_length, const char *tar_filename)
+bool ScriptScanner::AddFile(const std::string &filename, size_t basepath_length, const std::string &tar_filename)
 {
-	free(this->main_script);
-	this->main_script = stredup(filename);
-	if (this->main_script == nullptr) return false;
+	this->main_script = filename;
+	this->tar_file = tar_filename;
 
-	free(this->tar_file);
-	if (tar_filename != nullptr) {
-		this->tar_file = stredup(tar_filename);
-		if (this->tar_file == nullptr) return false;
-	} else {
-		this->tar_file = nullptr;
-	}
-
-	const char *end = this->main_script + strlen(this->main_script) + 1;
-	char *p = strrchr(this->main_script, PATHSEPCHAR);
-	if (p == nullptr) {
-		p = this->main_script;
-	} else {
-		/* Skip over the path separator character. We don't need that. */
-		p++;
-	}
-
-	strecpy(p, "main.nut", end);
+	auto p = this->main_script.rfind(PATHSEPCHAR);
+	this->main_script.erase(p != std::string::npos ? p + 1 : 0);
+	this->main_script += "main.nut";
 
 	if (!FioCheckFileExists(filename, this->subdir) || !FioCheckFileExists(this->main_script, this->subdir)) return false;
 
 	this->ResetEngine();
 	try {
-		this->engine->LoadScript(filename);
+		this->engine->LoadScript(filename.c_str());
 	} catch (Script_FatalError &e) {
-		DEBUG(script, 0, "Fatal error '%s' when trying to load the script '%s'.", e.GetErrorMessage(), filename);
+		DEBUG(script, 0, "Fatal error '%s' when trying to load the script '%s'.", e.GetErrorMessage(), filename.c_str());
 		return false;
 	}
 	return true;
 }
 
 ScriptScanner::ScriptScanner() :
-	engine(nullptr),
-	main_script(nullptr),
-	tar_file(nullptr)
+	engine(nullptr)
 {
 }
 
@@ -87,8 +69,6 @@ ScriptScanner::~ScriptScanner()
 {
 	this->Reset();
 
-	free(this->main_script);
-	free(this->tar_file);
 	delete this->engine;
 }
 
@@ -194,7 +174,7 @@ struct ScriptFileChecksumCreator : FileS
 	}
 
 	/* Add the file and calculate the md5 sum. */
-	virtual bool AddFile(const char *filename, size_t basepath_length, const char *tar_filename)
+	virtual bool AddFile(const std::string &filename, size_t basepath_length, const std::string &tar_filename)
 	{
 		Md5 checksum;
 		uint8 buffer[1024];
@@ -202,7 +182,7 @@ struct ScriptFileChecksumCreator : FileS
 		byte tmp_md5sum[16];
 
 		/* Open the file ... */
-		FILE *f = FioFOpenFile(filename, "rb", this->dir, &size);
+		FILE *f = FioFOpenFile(filename.c_str(), "rb", this->dir, &size);
 		if (f == nullptr) return false;
 
 		/* ... calculate md5sum... */
@@ -239,9 +219,9 @@ static bool IsSameScript(const ContentIn
 	if (!md5sum) return true;
 
 	ScriptFileChecksumCreator checksum(dir);
-	const char *tar_filename = info->GetTarFile();
+	auto tar_filename = info->GetTarFile();
 	TarList::iterator iter;
-	if (tar_filename != nullptr && (iter = _tar_list[dir].find(tar_filename)) != _tar_list[dir].end()) {
+	if (!tar_filename.empty() && (iter = _tar_list[dir].find(tar_filename)) != _tar_list[dir].end()) {
 		/* The main script is in a tar file, so find all files that
 		 * are in the same tar and add them to the MD5 checksumming. */
 		TarFileList::iterator tar;
@@ -253,7 +233,7 @@ static bool IsSameScript(const ContentIn
 			const char *ext = strrchr(tar->first.c_str(), '.');
 			if (ext == nullptr || strcasecmp(ext, ".nut") != 0) continue;
 
-			checksum.AddFile(tar->first.c_str(), 0, tar_filename);
+			checksum.AddFile(tar->first, 0, tar_filename);
 		}
 	} else {
 		char path[MAX_PATH];
diff --git a/src/script/script_scanner.hpp b/src/script/script_scanner.hpp
--- a/src/script/script_scanner.hpp
+++ b/src/script/script_scanner.hpp
@@ -32,12 +32,12 @@ public:
 	/**
 	 * Get the current main script the ScanDir is currently tracking.
 	 */
-	const char *GetMainScript() { return this->main_script; }
+	std::string GetMainScript() { return this->main_script; }
 
 	/**
 	 * Get the current tar file the ScanDir is currently tracking.
 	 */
-	const char *GetTarFile() { return this->tar_file; }
+	std::string GetTarFile() { return this->tar_file; }
 
 	/**
 	 * Get the list of all registered scripts.
@@ -75,7 +75,7 @@ public:
 	 */
 	const char *FindMainScript(const ContentInfo *ci, bool md5sum);
 
-	bool AddFile(const char *filename, size_t basepath_length, const char *tar_filename) override;
+	bool AddFile(const std::string &filename, size_t basepath_length, const std::string &tar_filename) override;
 
 	/**
 	 * Rescan the script dir.
@@ -83,9 +83,9 @@ public:
 	void RescanDir();
 
 protected:
-	class Squirrel *engine; ///< The engine we're scanning with.
-	char *main_script;      ///< The full path of the script.
-	char *tar_file;         ///< If, which tar file the script was in.
+	class Squirrel *engine;  ///< The engine we're scanning with.
+	std::string main_script; ///< The full path of the script.
+	std::string tar_file;    ///< If, which tar file the script was in.
 
 	ScriptInfoList info_list;        ///< The list of all script.
 	ScriptInfoList info_single_list; ///< The list of all unique script. The best script (highest version) is shown.
diff --git a/src/tar_type.h b/src/tar_type.h
--- a/src/tar_type.h
+++ b/src/tar_type.h
@@ -12,30 +12,20 @@
 
 #include <map>
 #include <string>
+#include <array>
 
 #include "fileio_type.h"
 
-/** The define of a TarList. */
-struct TarListEntry {
-	const char *filename;
-	const char *dirname;
-
-	/* MSVC goes copying around this struct after initialisation, so it tries
-	 * to free filename, which isn't set at that moment... but because it
-	 * initializes the variable with garbage, it's going to segfault. */
-	TarListEntry() : filename(nullptr), dirname(nullptr) {}
-	~TarListEntry() { free(this->filename); free(this->dirname); }
-};
 
 struct TarFileListEntry {
-	const char *tar_filename;
+	std::string tar_filename;
 	size_t size;
 	size_t position;
 };
 
-typedef std::map<std::string, TarListEntry> TarList;
+typedef std::map<std::string, std::string> TarList; ///< Map of tar file to tar directory.
 typedef std::map<std::string, TarFileListEntry> TarFileList;
-extern TarList _tar_list[NUM_SUBDIRS];
+extern std::array<TarList, NUM_SUBDIRS> _tar_list;
 extern TarFileList _tar_filelist[NUM_SUBDIRS];
 
 #define FOR_ALL_TARS(tar, sd) for (tar = _tar_filelist[sd].begin(); tar != _tar_filelist[sd].end(); tar++)