Codechange: Convert some more FIO functions to take std::string.

14 files changed, 62 insertions, 68 deletions

diff --git a/src/fileio.cpp b/src/fileio.cpp
index afdbdd256..09e884e4f 100644
--- a/src/fileio.cpp
+++ b/src/fileio.cpp
@@ -270,9 +270,9 @@ bool IsValidSearchPath(Searchpath sp)
  * @param subdir the subdirectory to look in
  * @return true if and only if the file can be opened
  */
-bool FioCheckFileExists(const char *filename, Subdirectory subdir)
+bool FioCheckFileExists(const std::string &filename, Subdirectory subdir)
 {
-	FILE *f = FioFOpenFile(filename, "rb", subdir);
+	FILE *f = FioFOpenFile(filename.c_str(), "rb", subdir);
 	if (f == nullptr) return false;
 
 	FioFCloseFile(f);
@@ -284,9 +284,9 @@ bool FioCheckFileExists(const char *filename, Subdirectory subdir)
  * @param filename the file to test.
  * @return true if and only if the file exists.
  */
-bool FileExists(const char *filename)
+bool FileExists(const std::string &filename)
 {
-	return access(OTTD2FS(filename), 0) == 0;
+	return access(OTTD2FS(filename.c_str()), 0) == 0;
 }
 
 /**
@@ -311,12 +311,12 @@ std::string FioFindFullPath(Subdirectory subdir, const char *filename)
 	FOR_ALL_SEARCHPATHS(sp) {
 		std::string buf = FioGetDirectory(sp, subdir);
 		buf += filename;
-		if (FileExists(buf.c_str())) return buf;
+		if (FileExists(buf)) return buf;
 #if !defined(_WIN32)
 		/* Be, as opening files, aware that sometimes the filename
 		 * might be in uppercase when it is in lowercase on the
 		 * disk. Of course Windows doesn't care about casing. */
-		if (strtolower(buf, _searchpaths[sp].size() - 1) && FileExists(buf.c_str())) return buf;
+		if (strtolower(buf, _searchpaths[sp].size() - 1) && FileExists(buf)) return buf;
 #endif
 	}
 
@@ -338,7 +338,7 @@ std::string FioFindDirectory(Subdirectory subdir)
 	/* Find and return the first valid directory */
 	FOR_ALL_SEARCHPATHS(sp) {
 		std::string ret = FioGetDirectory(sp, subdir);
-		if (FileExists(ret.c_str())) return ret;
+		if (FileExists(ret)) return ret;
 	}
 
 	/* Could not find the directory, fall back to a base path */
@@ -502,14 +502,12 @@ FILE *FioFOpenFile(const char *filename, const char *mode, Subdirectory subdir,
  * If the parent directory does not exist, it will try to create that as well.
  * @param name the new name of the directory
  */
-void FioCreateDirectory(const char *name)
+void FioCreateDirectory(const std::string &name)
 {
-	char dirname[MAX_PATH];
-	strecpy(dirname, name, lastof(dirname));
-	char *p = strrchr(dirname, PATHSEPCHAR);
-	if (p != nullptr) {
-		*p = '\0';
-		DIR *dir = ttd_opendir(dirname);
+	auto p = name.find_last_of(PATHSEPCHAR);
+	if (p != std::string::npos) {
+		std::string dirname = name.substr(0, p);
+		DIR *dir = ttd_opendir(dirname.c_str());
 		if (dir == nullptr) {
 			FioCreateDirectory(dirname); // Try creating the parent directory, if we couldn't open it
 		} else {
@@ -520,11 +518,11 @@ void FioCreateDirectory(const char *name)
 	/* Ignore directory creation errors; they'll surface later on, and most
 	 * of the time they are 'directory already exists' errors anyhow. */
 #if defined(_WIN32)
-	CreateDirectory(OTTD2FS(name), nullptr);
+	CreateDirectory(OTTD2FS(name.c_str()), nullptr);
 #elif defined(OS2) && !defined(__INNOTEK_LIBC__)
-	mkdir(OTTD2FS(name));
+	mkdir(OTTD2FS(name.c_str()));
 #else
-	mkdir(OTTD2FS(name), 0755);
+	mkdir(OTTD2FS(name.c_str()), 0755);
 #endif
 }
 
@@ -1198,9 +1196,9 @@ void DeterminePaths(const char *exe)
 	}
 
 	/* Make the necessary folders */
-	FioCreateDirectory(config_dir.c_str());
+	FioCreateDirectory(config_dir);
 #if defined(WITH_PERSONAL_DIR)
-	FioCreateDirectory(_personal_dir.c_str());
+	FioCreateDirectory(_personal_dir);
 #endif
 
 	DEBUG(misc, 3, "%s found as personal directory", _personal_dir.c_str());
@@ -1210,19 +1208,17 @@ void DeterminePaths(const char *exe)
 	};
 
 	for (uint i = 0; i < lengthof(default_subdirs); i++) {
-		FioCreateDirectory((_personal_dir + _subdirs[default_subdirs[i]]).c_str());
+		FioCreateDirectory(_personal_dir + _subdirs[default_subdirs[i]]);
 	}
 
 	/* If we have network we make a directory for the autodownloading of content */
 	_searchpaths[SP_AUTODOWNLOAD_DIR] = _personal_dir + "content_download" PATHSEP;
-	FioCreateDirectory(_searchpaths[SP_AUTODOWNLOAD_DIR].c_str());
+	FioCreateDirectory(_searchpaths[SP_AUTODOWNLOAD_DIR]);
 
 	/* Create the directory for each of the types of content */
 	const Subdirectory dirs[] = { SCENARIO_DIR, HEIGHTMAP_DIR, BASESET_DIR, NEWGRF_DIR, AI_DIR, AI_LIBRARY_DIR, GAME_DIR, GAME_LIBRARY_DIR };
 	for (uint i = 0; i < lengthof(dirs); i++) {
-		char *tmp = str_fmt("%s%s", _searchpaths[SP_AUTODOWNLOAD_DIR].c_str(), _subdirs[dirs[i]]);
-		FioCreateDirectory(tmp);
-		free(tmp);
+		FioCreateDirectory(FioGetDirectory(SP_AUTODOWNLOAD_DIR, dirs[i]));
 	}
 
 	extern std::string _log_file;
diff --git a/src/fileio_func.h b/src/fileio_func.h
index 83e90be17..5007a04e6 100644
--- a/src/fileio_func.h
+++ b/src/fileio_func.h
@@ -38,11 +38,11 @@ bool IsValidSearchPath(Searchpath sp);
 
 void FioFCloseFile(FILE *f);
 FILE *FioFOpenFile(const char *filename, const char *mode, Subdirectory subdir, size_t *filesize = nullptr);
-bool FioCheckFileExists(const char *filename, Subdirectory subdir);
+bool FioCheckFileExists(const std::string &filename, Subdirectory subdir);
 std::string FioFindFullPath(Subdirectory subdir, const char *filename);
 std::string FioGetDirectory(Searchpath sp, Subdirectory subdir);
 std::string FioFindDirectory(Subdirectory subdir);
-void FioCreateDirectory(const char *name);
+void FioCreateDirectory(const std::string &name);
 
 const char *FiosGetScreenshotDir();
 
@@ -50,7 +50,7 @@ void SanitizeFilename(char *filename);
 void AppendPathSeparator(std::string &buf);
 void DeterminePaths(const char *exe);
 void *ReadFileToMem(const char *filename, size_t *lenp, size_t maxsize);
-bool FileExists(const char *filename);
+bool FileExists(const std::string &filename);
 bool ExtractTar(const char *tar_filename, Subdirectory subdir);
 
 extern std::string _personal_dir; ///< custom directory for personal settings, saves, newgrf, etc.
diff --git a/src/fios.cpp b/src/fios.cpp
index 4e2378a34..e7341b1f5 100644
--- a/src/fios.cpp
+++ b/src/fios.cpp
@@ -200,26 +200,26 @@ const char *FiosBrowseTo(const FiosItem *item)
 
 /**
  * Construct a filename from its components in destination buffer \a buf.
- * @param buf Destination buffer.
  * @param path Directory path, may be \c nullptr.
  * @param name Filename.
  * @param ext Filename extension (use \c "" for no extension).
- * @param last Last element of buffer \a buf.
+ * @return The completed filename.
  */
-static void FiosMakeFilename(char *buf, const char *path, const char *name, const char *ext, const char *last)
+static std::string FiosMakeFilename(const std::string *path, const char *name, const char *ext)
 {
+	std::string buf;
+
 	if (path != nullptr) {
-		const char *buf_start = buf;
-		buf = strecpy(buf, path, last);
+		buf = *path;
 		/* Remove trailing path separator, if present */
-		if (buf > buf_start && buf[-1] == PATHSEPCHAR) buf--;
+		if (!buf.empty() && buf.back() == PATHSEPCHAR) buf.pop_back();
 	}
 
 	/* Don't append the extension if it is already there */
 	const char *period = strrchr(name, '.');
 	if (period != nullptr && strcasecmp(period, ext) == 0) ext = "";
 
-	seprintf(buf, last, PATHSEP "%s%s", name, ext);
+	return buf + name + ext;
 }
 
 /**
@@ -227,27 +227,26 @@ static void FiosMakeFilename(char *buf, const char *path, const char *name, cons
  * @param buf Destination buffer for saving the filename.
  * @param name Name of the file.
  * @param last Last element of buffer \a buf.
+ * @return The completed filename.
  */
-void FiosMakeSavegameName(char *buf, const char *name, const char *last)
+std::string FiosMakeSavegameName(const char *name)
 {
 	const char *extension = (_game_mode == GM_EDITOR) ? ".scn" : ".sav";
 
-	FiosMakeFilename(buf, _fios_path->c_str(), name, extension, last);
+	return FiosMakeFilename(_fios_path, name, extension);
 }
 
 /**
  * Construct a filename for a height map.
- * @param buf Destination buffer.
  * @param name Filename.
- * @param last Last element of buffer \a buf.
+ * @return The completed filename.
  */
-void FiosMakeHeightmapName(char *buf, const char *name, const char *last)
+std::string FiosMakeHeightmapName(const char *name)
 {
-	char ext[5];
-	ext[0] = '.';
-	strecpy(ext + 1, GetCurrentScreenshotExtension(), lastof(ext));
+	std::string ext(".");
+	ext += GetCurrentScreenshotExtension();
 
-	FiosMakeFilename(buf, _fios_path->c_str(), name, ext, last);
+	return FiosMakeFilename(_fios_path, name, ext.c_str());
 }
 
 /**
@@ -257,10 +256,8 @@ void FiosMakeHeightmapName(char *buf, const char *name, const char *last)
  */
 bool FiosDelete(const char *name)
 {
-	char filename[512];
-
-	FiosMakeSavegameName(filename, name, lastof(filename));
-	return unlink(filename) == 0;
+	std::string filename = FiosMakeSavegameName(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);
diff --git a/src/fios.h b/src/fios.h
index 259e493b2..e211396c1 100644
--- a/src/fios.h
+++ b/src/fios.h
@@ -220,8 +220,8 @@ const char *FiosBrowseTo(const FiosItem *item);
 
 StringID FiosGetDescText(const char **path, uint64 *total_free);
 bool FiosDelete(const char *name);
-void FiosMakeHeightmapName(char *buf, const char *name, const char *last);
-void FiosMakeSavegameName(char *buf, const char *name, const char *last);
+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);
 
diff --git a/src/fios_gui.cpp b/src/fios_gui.cpp
index 53bb606f3..a86bb7a22 100644
--- a/src/fios_gui.cpp
+++ b/src/fios_gui.cpp
@@ -771,14 +771,14 @@ public:
 			}
 		} else if (this->IsWidgetLowered(WID_SL_SAVE_GAME)) { // Save button clicked
 			if (this->abstract_filetype == FT_SAVEGAME || this->abstract_filetype == FT_SCENARIO) {
-				FiosMakeSavegameName(_file_to_saveload.name, this->filename_editbox.text.buf, lastof(_file_to_saveload.name));
+				_file_to_saveload.name = FiosMakeSavegameName(this->filename_editbox.text.buf);
 				if (FioCheckFileExists(_file_to_saveload.name, Subdirectory::SAVE_DIR)) {
 					ShowQuery(STR_SAVELOAD_OVERWRITE_TITLE, STR_SAVELOAD_OVERWRITE_WARNING, this, SaveLoadWindow::SaveGameConfirmationCallback);
 				} else {
 					_switch_mode = SM_SAVE_GAME;
 				}
 			} else {
-				FiosMakeHeightmapName(_file_to_saveload.name, this->filename_editbox.text.buf, lastof(_file_to_saveload.name));
+				_file_to_saveload.name = FiosMakeHeightmapName(this->filename_editbox.text.buf);
 				if (FioCheckFileExists(_file_to_saveload.name, Subdirectory::SAVE_DIR)) {
 					ShowQuery(STR_SAVELOAD_OVERWRITE_TITLE, STR_SAVELOAD_OVERWRITE_WARNING, this, SaveLoadWindow::SaveHeightmapConfirmationCallback);
 				} else {
diff --git a/src/genworld_gui.cpp b/src/genworld_gui.cpp
index 4f1524f8a..37f3962ec 100644
--- a/src/genworld_gui.cpp
+++ b/src/genworld_gui.cpp
@@ -831,7 +831,7 @@ static void _ShowGenerateLandscape(GenerateLandscapeWindowMode mode)
 
 	if (mode == GLWM_HEIGHTMAP) {
 		/* If the function returns negative, it means there was a problem loading the heightmap */
-		if (!GetHeightmapDimensions(_file_to_saveload.detail_ftype, _file_to_saveload.name, &x, &y)) return;
+		if (!GetHeightmapDimensions(_file_to_saveload.detail_ftype, _file_to_saveload.name.c_str(), &x, &y)) return;
 	}
 
 	WindowDesc *desc = (mode == GLWM_HEIGHTMAP) ? &_heightmap_load_desc : &_generate_landscape_desc;
diff --git a/src/landscape.cpp b/src/landscape.cpp
index 6dddbfd70..9f4116a23 100644
--- a/src/landscape.cpp
+++ b/src/landscape.cpp
@@ -1305,7 +1305,7 @@ void GenerateLandscape(byte mode)
 
 	if (mode == GWM_HEIGHTMAP) {
 		SetGeneratingWorldProgress(GWP_LANDSCAPE, steps + GLS_HEIGHTMAP);
-		LoadHeightmap(_file_to_saveload.detail_ftype, _file_to_saveload.name);
+		LoadHeightmap(_file_to_saveload.detail_ftype, _file_to_saveload.name.c_str());
 		IncreaseGeneratingWorldProgress(GWP_LANDSCAPE);
 	} else if (_settings_game.game_creation.land_generator == LG_TERRAGENESIS) {
 		SetGeneratingWorldProgress(GWP_LANDSCAPE, steps + GLS_TERRAGENESIS);
diff --git a/src/music/midifile.cpp b/src/music/midifile.cpp
index b15a27911..59cc2a631 100644
--- a/src/music/midifile.cpp
+++ b/src/music/midifile.cpp
@@ -1078,11 +1078,11 @@ std::string MidiFile::GetSMFFile(const MusicSongInfo &song)
 	std::string tempdirname = FioGetDirectory(Searchpath::SP_AUTODOWNLOAD_DIR, Subdirectory::BASESET_DIR);
 	tempdirname += basename;
 	AppendPathSeparator(tempdirname);
-	FioCreateDirectory(tempdirname.c_str());
+	FioCreateDirectory(tempdirname);
 
 	std::string output_filename = tempdirname + std::to_string(song.cat_index) + ".mid";
 
-	if (FileExists(output_filename.c_str())) {
+	if (FileExists(output_filename)) {
 		/* If the file already exists, assume it's the correct decoded data */
 		return output_filename;
 	}
diff --git a/src/network/network_client.cpp b/src/network/network_client.cpp
index eb5c4cbb3..a66786dad 100644
--- a/src/network/network_client.cpp
+++ b/src/network/network_client.cpp
@@ -541,7 +541,7 @@ bool ClientNetworkGameSocketHandler::IsConnected()
  *   DEF_CLIENT_RECEIVE_COMMAND has parameter: Packet *p
  ************/
 
-extern bool SafeLoad(const char *filename, SaveLoadOperation fop, DetailedFileType dft, GameMode newgm, Subdirectory subdir, struct LoadFilter *lf = nullptr);
+extern bool SafeLoad(const std::string &filename, SaveLoadOperation fop, DetailedFileType dft, GameMode newgm, Subdirectory subdir, struct LoadFilter *lf = nullptr);
 
 NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_FULL(Packet *p)
 {
@@ -867,7 +867,7 @@ NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_MAP_DONE(Packet
 
 	/* The map is done downloading, load it */
 	ClearErrorMessages();
-	bool load_success = SafeLoad(nullptr, SLO_LOAD, DFT_GAME_FILE, GM_NORMAL, NO_DIRECTORY, lf);
+	bool load_success = SafeLoad({}, SLO_LOAD, DFT_GAME_FILE, GM_NORMAL, NO_DIRECTORY, lf);
 
 	/* Long savegame loads shouldn't affect the lag calculation! */
 	this->last_packet = _realtime_tick;
diff --git a/src/openttd.cpp b/src/openttd.cpp
index 2409e8e4e..3e1b36cd8 100644
--- a/src/openttd.cpp
+++ b/src/openttd.cpp
@@ -626,9 +626,9 @@ int openttd_main(int argc, char *argv[])
 				_file_to_saveload.SetMode(SLO_LOAD, is_scenario ? FT_SCENARIO : FT_SAVEGAME, DFT_GAME_FILE);
 
 				/* if the file doesn't exist or it is not a valid savegame, let the saveload code show an error */
-				const char *t = strrchr(_file_to_saveload.name, '.');
-				if (t != nullptr) {
-					FiosType ft = FiosGetSavegameListCallback(SLO_LOAD, _file_to_saveload.name, t, nullptr, nullptr);
+				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);
 					if (ft != FIOS_TYPE_INVALID) _file_to_saveload.SetMode(ft);
 				}
 
@@ -960,7 +960,7 @@ static void MakeNewEditorWorld()
  * @param subdir default directory to look for filename, set to 0 if not needed
  * @param lf Load filter to use, if nullptr: use filename + subdir.
  */
-bool SafeLoad(const char *filename, SaveLoadOperation fop, DetailedFileType dft, GameMode newgm, Subdirectory subdir, struct LoadFilter *lf = nullptr)
+bool SafeLoad(const std::string &filename, SaveLoadOperation fop, DetailedFileType dft, GameMode newgm, Subdirectory subdir, struct LoadFilter *lf = nullptr)
 {
 	assert(fop == SLO_LOAD);
 	assert(dft == DFT_GAME_FILE || (lf == nullptr && dft == DFT_OLD_GAME_FILE));
@@ -968,7 +968,7 @@ bool SafeLoad(const char *filename, SaveLoadOperation fop, DetailedFileType dft,
 
 	_game_mode = newgm;
 
-	switch (lf == nullptr ? SaveOrLoad(filename, fop, dft, subdir) : LoadWithFilter(lf)) {
+	switch (lf == nullptr ? SaveOrLoad(filename.c_str(), fop, dft, subdir) : LoadWithFilter(lf)) {
 		case SL_OK: return true;
 
 		case SL_REINIT:
@@ -1127,7 +1127,7 @@ void SwitchToMode(SwitchMode new_mode)
 
 		case SM_SAVE_GAME: // Save game.
 			/* Make network saved games on pause compatible to singleplayer */
-			if (SaveOrLoad(_file_to_saveload.name, SLO_SAVE, DFT_GAME_FILE, NO_DIRECTORY) != SL_OK) {
+			if (SaveOrLoad(_file_to_saveload.name.c_str(), SLO_SAVE, DFT_GAME_FILE, NO_DIRECTORY) != SL_OK) {
 				SetDParamStr(0, GetSaveLoadErrorString());
 				ShowErrorMessage(STR_JUST_RAW_STRING, INVALID_STRING_ID, WL_ERROR);
 			} else {
@@ -1136,7 +1136,7 @@ void SwitchToMode(SwitchMode new_mode)
 			break;
 
 		case SM_SAVE_HEIGHTMAP: // Save heightmap.
-			MakeHeightmapScreenshot(_file_to_saveload.name);
+			MakeHeightmapScreenshot(_file_to_saveload.name.c_str());
 			DeleteWindowById(WC_SAVELOAD, 0);
 			break;
 
diff --git a/src/saveload/saveload.cpp b/src/saveload/saveload.cpp
index bfbf1957b..2bb960da6 100644
--- a/src/saveload/saveload.cpp
+++ b/src/saveload/saveload.cpp
@@ -2930,7 +2930,7 @@ void FileToSaveLoad::SetMode(SaveLoadOperation fop, AbstractFileType aft, Detail
  */
 void FileToSaveLoad::SetName(const char *name)
 {
-	strecpy(this->name, name, lastof(this->name));
+	this->name = name;
 }
 
 /**
diff --git a/src/saveload/saveload.h b/src/saveload/saveload.h
index a153b3630..5406462f6 100644
--- a/src/saveload/saveload.h
+++ b/src/saveload/saveload.h
@@ -12,6 +12,7 @@
 
 #include "../fileio_type.h"
 #include "../strings_type.h"
+#include <string>
 
 /** SaveLoad versions
  * Previous savegame versions, the trunk revision where they were
@@ -337,7 +338,7 @@ struct FileToSaveLoad {
 	SaveLoadOperation file_op;           ///< File operation to perform.
 	DetailedFileType detail_ftype;   ///< Concrete file type (PNG, BMP, old save, etc).
 	AbstractFileType abstract_ftype; ///< Abstract type of file (scenario, heightmap, etc).
-	char name[MAX_PATH];             ///< Name of the file.
+	std::string name;                ///< Name of the file.
 	char title[255];                 ///< Internal name of the game.
 
 	void SetMode(FiosType ft);
diff --git a/src/script/script_instance.cpp b/src/script/script_instance.cpp
index 836bb8246..8227060d3 100644
--- a/src/script/script_instance.cpp
+++ b/src/script/script_instance.cpp
@@ -120,7 +120,7 @@ bool ScriptInstance::LoadCompatibilityScripts(const char *api_version, Subdirect
 	FOR_ALL_SEARCHPATHS(sp) {
 		std::string buf = FioGetDirectory(sp, dir);
 		buf += script_name;
-		if (!FileExists(buf.c_str())) continue;
+		if (!FileExists(buf)) continue;
 
 		if (this->engine->LoadScript(buf.c_str())) return true;
 
diff --git a/src/video/dedicated_v.cpp b/src/video/dedicated_v.cpp
index b3acb82a4..7efd417ce 100644
--- a/src/video/dedicated_v.cpp
+++ b/src/video/dedicated_v.cpp
@@ -128,7 +128,7 @@ static void *_dedicated_video_mem;
 /* Whether a fork has been done. */
 bool _dedicated_forks;
 
-extern bool SafeLoad(const char *filename, SaveLoadOperation fop, DetailedFileType dft, GameMode newgm, Subdirectory subdir, struct LoadFilter *lf = nullptr);
+extern bool SafeLoad(const std::string &filename, SaveLoadOperation fop, DetailedFileType dft, GameMode newgm, Subdirectory subdir, struct LoadFilter *lf = nullptr);
 
 static FVideoDriver_Dedicated iFVideoDriver_Dedicated;