config: try to fix float locale issues

Utilities/Config.cpp

@@ -1,7 +1,6 @@
 #include "stdafx.h"
 #include "Config.h"
 #include "util/types.hpp"
-
 #include "util/yaml.hpp"
 
 #include <charconv>
@@ -184,6 +183,22 @@ bool try_to_float(f64* out, std::string_view value, f64 min, f64 max)
 	return true;
 }
 
+bool try_to_string(std::string* out, const f64& value)
+{
+	std::array<char, 32> str{};
+
+	if (auto [ptr, ec] = std::to_chars(str.data(), str.data() + str.size(), value, std::chars_format::fixed); ec == std::errc())
+	{
+		*out = std::string(str.data(), ptr);
+		return true;
+	}
+	else
+	{
+		if (out) cfg_log.error("cfg::try_to_string(): could not convert value '%f' to string. error='%s'", value, std::make_error_code(ec).message());
+		return false;
+	}
+}
+
 bool cfg::try_to_enum_value(u64* out, decltype(&fmt_class_string<int>::format) func, std::string_view value)
 {
 	u64 max = umax;

Utilities/Config.h

@@ -384,12 +384,24 @@ namespace cfg
 
 		std::string to_string() const override
 		{
-			return std::to_string(m_value);
+			std::string result;
+			if (try_to_string(&result, m_value))
+			{
+				return result;
+			}
+
+			return "0.0";
 		}
 
 		std::string def_to_string() const override
 		{
-			return std::to_string(def);
+			std::string result;
+			if (try_to_string(&result, def))
+			{
+				return result;
+			}
+
+			return "0.0";
 		}
 
 		bool from_string(std::string_view value, bool /*dynamic*/ = false) override

Utilities/StrUtil.h

@@ -31,6 +31,9 @@ bool try_to_uint64(u64* out, std::string_view value, u64 min, u64 max);
 // Convert string to float
 bool try_to_float(f64* out, std::string_view value, f64 min, f64 max);
 
+// Convert float to string locale independant
+bool try_to_string(std::string* out, const f64& value);
+
 // Get the file extension of a file path ("png", "jpg", etc.)
 std::string get_file_extension(const std::string& file_path);