Fix settings to honor numeric conversion errors

Rename try* non exceptioning functions to *NoEx

src/emerge.cpp

@@ -102,15 +102,15 @@ EmergeManager::EmergeManager(IGameDef *gamedef) {
 	// if unspecified, leave a proc for the main thread and one for
 	// some other misc thread
 	int nthreads = 0;
-	if (!g_settings->tryGetS16("num_emerge_threads", nthreads))
+	if (!g_settings->getS16NoEx("num_emerge_threads", nthreads))
 		nthreads = porting::getNumberOfProcessors() - 2;
 	if (nthreads < 1)
 		nthreads = 1;
 
 	qlimit_total = g_settings->getU16("emergequeue_limit_total");
-	if (!g_settings->tryGetU16("emergequeue_limit_diskonly", qlimit_diskonly))
+	if (!g_settings->getU16NoEx("emergequeue_limit_diskonly", qlimit_diskonly))
 		qlimit_diskonly = nthreads * 5 + 1;
-	if (!g_settings->tryGetU16("emergequeue_limit_generate", qlimit_generate))
+	if (!g_settings->getU16NoEx("emergequeue_limit_generate", qlimit_generate))
 		qlimit_generate = nthreads + 1;
 
 	for (int i = 0; i != nthreads; i++)
@@ -352,13 +352,13 @@ void EmergeManager::loadParamsFromSettings(Settings *settings) {
 	std::string seed_str;
 	const char *setname = (settings == g_settings) ? "fixed_map_seed" : "seed";
 
-	if (settings->tryGet(setname, seed_str))
+	if (settings->getNoEx(setname, seed_str))
 		params.seed = read_seed(seed_str.c_str());
 
-	settings->tryGet("mg_name",         params.mg_name);
-	settings->tryGetS16("water_level",  params.water_level);
-	settings->tryGetS16("chunksize",    params.chunksize);
-	settings->tryGetFlagStr("mg_flags", params.flags, flagdesc_mapgen);
+	settings->getNoEx("mg_name",         params.mg_name);
+	settings->getS16NoEx("water_level",  params.water_level);
+	settings->getS16NoEx("chunksize",    params.chunksize);
+	settings->getFlagStrNoEx("mg_flags", params.flags, flagdesc_mapgen);
 
 	delete params.sparams;
 	params.sparams = createMapgenParams(params.mg_name);

src/exceptions.h

@@ -85,6 +85,11 @@ public:
 	SettingNotFoundException(std::string s): BaseException(s) {}
 };
 
+class NumericException : public BaseException {
+public:
+	NumericException(std::string s): BaseException(s) {}
+};
+
 class InvalidFilenameException : public BaseException {
 public:
 	InvalidFilenameException(std::string s): BaseException(s) {}

src/main.cpp

@@ -1671,9 +1671,10 @@ int main(int argc, char *argv[])
 				//infostream<<"Main: password hash: '"<<password<<"'"<<std::endl;
 
 				address = menudata.address;
-				int newport = stoi(menudata.port);
-				if(newport != 0)
-					port = newport;
+				try {
+					port = stoi(menudata.port);
+				}
+				catch (NumericException&e) {}
 
 				simple_singleplayer_mode = menudata.simple_singleplayer_mode;
 

src/mapgen_indev.cpp

@@ -164,7 +164,7 @@ MapgenIndevParams::MapgenIndevParams() {
 void MapgenIndevParams::readParams(Settings *settings) {
 	MapgenV6Params::readParams(settings);
 
-	settings->tryGetS16("mgindev_float_islands", float_islands);
+	settings->getS16NoEx("mgindev_float_islands", float_islands);
 
 	settings->getNoiseIndevParams("mgindev_np_terrain_base",   npindev_terrain_base);
 	settings->getNoiseIndevParams("mgindev_np_terrain_higher", npindev_terrain_higher);

src/mapgen_v6.cpp

@@ -112,9 +112,9 @@ MapgenV6Params::MapgenV6Params() {
 
 
 void MapgenV6Params::readParams(Settings *settings) {
-	settings->tryGetFlagStr("mgv6_spflags", spflags, flagdesc_mapgen_v6);
-	settings->tryGetFloat("mgv6_freq_desert", freq_desert);
-	settings->tryGetFloat("mgv6_freq_beach",  freq_beach);
+	settings->getFlagStrNoEx("mgv6_spflags", spflags, flagdesc_mapgen_v6);
+	settings->getFloatNoEx("mgv6_freq_desert", freq_desert);
+	settings->getFloatNoEx("mgv6_freq_beach",  freq_beach);
 
 	settings->getNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 	settings->getNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);

src/mapgen_v7.cpp

@@ -126,7 +126,7 @@ MapgenV7Params::MapgenV7Params() {
 
 
 void MapgenV7Params::readParams(Settings *settings) {
-	settings->tryGetFlagStr("mgv7_spflags", spflags, flagdesc_mapgen_v7);
+	settings->getFlagStrNoEx("mgv7_spflags", spflags, flagdesc_mapgen_v7);
 
 	settings->getNoiseParams("mgv7_np_terrain_base",    np_terrain_base);
 	settings->getNoiseParams("mgv7_np_terrain_alt",     np_terrain_alt);

src/settings.h

@@ -745,17 +745,19 @@ fail:
 	}
 
 	//////////// Try to get value, no exception thrown
-	bool tryGet(std::string name, std::string &val)
+	bool getNoEx(std::string name, std::string &val)
 	{
 		try {
 			val = get(name);
 			return true;
 		} catch (SettingNotFoundException &e) {
 			return false;
+		} catch (NumericException &e) {
+			return false;
 		}
 	}
 
-	bool tryGetFlagStr(std::string name, u32 &val, FlagDesc *flagdesc)
+	bool getFlagStrNoEx(std::string name, u32 &val, FlagDesc *flagdesc)
 	{
 		try {
 			val = getFlagStr(name, flagdesc);
@@ -765,93 +767,111 @@ fail:
 		}
 	}
 
-	bool tryGetFloat(std::string name, float &val)
+	bool getFloatNoEx(std::string name, float &val)
 	{
 		try {
 			val = getFloat(name);
 			return true;
 		} catch (SettingNotFoundException &e) {
 			return false;
+		} catch (NumericException &e) {
+			return false;
 		}
 	}
 
-	bool tryGetU16(std::string name, int &val)
+	bool getU16NoEx(std::string name, int &val)
 	{
 		try {
 			val = getU16(name);
 			return true;
 		} catch (SettingNotFoundException &e) {
 			return false;
+		} catch (NumericException &e) {
+			return false;
 		}
 	}
 
-	bool tryGetU16(std::string name, u16 &val)
+	bool getU16NoEx(std::string name, u16 &val)
 	{
 		try {
 			val = getU16(name);
 			return true;
 		} catch (SettingNotFoundException &e) {
 			return false;
+		} catch (NumericException &e) {
+			return false;
 		}
 	}
 
-	bool tryGetS16(std::string name, int &val)
+	bool getS16NoEx(std::string name, int &val)
 	{
 		try {
 			val = getU16(name);
 			return true;
 		} catch (SettingNotFoundException &e) {
 			return false;
+		} catch (NumericException &e) {
+			return false;
 		}
 	}
 
-	bool tryGetS16(std::string name, s16 &val)
+	bool getS16NoEx(std::string name, s16 &val)
 	{
 		try {
 			val = getS16(name);
 			return true;
 		} catch (SettingNotFoundException &e) {
 			return false;
+		} catch (NumericException &e) {
+			return false;
 		}
 	}
 
-	bool tryGetS32(std::string name, s32 &val)
+	bool getS32NoEx(std::string name, s32 &val)
 	{
 		try {
 			val = getS32(name);
 			return true;
 		} catch (SettingNotFoundException &e) {
 			return false;
+		} catch (NumericException &e) {
+			return false;
 		}
 	}
 
-	bool tryGetV3F(std::string name, v3f &val)
+	bool getV3FNoEx(std::string name, v3f &val)
 	{
 		try {
 			val = getV3F(name);
 			return true;
 		} catch (SettingNotFoundException &e) {
 			return false;
+		} catch (NumericException &e) {
+			return false;
 		}
 	}
 
-	bool tryGetV2F(std::string name, v2f &val)
+	bool getV2FNoEx(std::string name, v2f &val)
 	{
 		try {
 			val = getV2F(name);
 			return true;
 		} catch (SettingNotFoundException &e) {
 			return false;
+		} catch (NumericException &e) {
+			return false;
 		}
 	}
 
-	bool tryGetU64(std::string name, u64 &val)
+	bool getU64NoEx(std::string name, u64 &val)
 	{
 		try {
 			val = getU64(name);
 			return true;
 		} catch (SettingNotFoundException &e) {
 			return false;
+		} catch (NumericException &e) {
+			return false;
 		}
 	}
 

src/util/string.h

@@ -26,6 +26,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include <cstring>
 #include <vector>
 #include <sstream>
+#include "exceptions.h"
 
 struct FlagDesc {
 	const char *name;
@@ -145,17 +146,31 @@ inline std::string trim(const std::string &s)
 	return s.substr(front, back - front);
 }
 
+inline s32 mystoi(const std::string &s)
+{
+	char* endptr = NULL;
+	s32 retval = strtol(s.c_str(),&endptr,10);
+
+	if ((endptr == NULL) || (*endptr != 0) || (endptr == s.c_str()))
+		throw NumericException("string to convert");
+
+	return retval;
+}
+
 inline bool is_yes(const std::string &s)
 {
 	std::string s2 = lowercase(trim(s));
-	if(s2 == "y" || s2 == "yes" || s2 == "true" || atoi(s2.c_str()) != 0)
-		return true;
+	try {
+		if(s2 == "y" || s2 == "yes" || s2 == "true" || mystoi(s2) != 0)
+			return true;
+	}
+	catch(NumericException&e) {}
 	return false;
 }
 
 inline s32 mystoi(const std::string &s, s32 min, s32 max)
 {
-	s32 i = atoi(s.c_str());
+	s32 i = mystoi(s);
 	if(i < min)
 		i = min;
 	if(i > max)
@@ -173,25 +188,20 @@ inline s64 stoi64(const std::string &s) {
 // MSVC2010 includes it's own versions of these
 //#if !defined(_MSC_VER) || _MSC_VER < 1600
 
-inline s32 mystoi(const std::string &s)
-{
-	return atoi(s.c_str());
-}
-
 inline s32 mystoi(const std::wstring &s)
 {
-	return atoi(wide_to_narrow(s).c_str());
+	return mystoi(wide_to_narrow(s).c_str());
 }
 
 inline float mystof(const std::string &s)
 {
-	// This crap causes a segfault in certain cases on MinGW
-	/*float f;
-	std::istringstream ss(s);
-	ss>>f;
-	return f;*/
-	// This works in that case
-	return atof(s.c_str());
+	char* endptr = NULL;
+	float retval = strtof(s.c_str(),&endptr);
+
+	if ((endptr == NULL) || (*endptr != 0) || (endptr == s.c_str()))
+		throw NumericException("string to convert");
+
+	return retval;
 }
 
 //#endif