Function parseFloat

sdk/add_on/scriptstdstring/scriptstdstring.cpp:906–951

AngelScript signature: double parseFloat(const string &in val, uint &out byteCount = 0)

// AngelScript signature:
// double parseFloat(const string &in val, uint &out byteCount = 0)
double parseFloat(const string &val, asUINT *byteCount)
{
	char *end;

	// Set the locale to C so that we are guaranteed to parse the float value correctly
#if defined(_WIN32)
	// WinCE doesn't have setlocale. Some quick testing on my current platform
	// still manages to parse the numbers such as "3.14" even if the decimal for the
	// locale is ",".
#if !defined(_WIN32_WCE)
	// On Windows setlocale is made threadsafe by turning on thread local setlocale
	// ref: https://learn.microsoft.com/en-us/cpp/parallel/multithreading-and-locales?view=msvc-170&redirectedfrom=MSDN
	int oldConfig = _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
	char* tmp = setlocale(LC_NUMERIC, 0);
	string orig = tmp ? tmp : "C";
	setlocale(LC_NUMERIC, "C");
#endif
#else
#if !defined(ANDROID) && !defined(__psp2__)
	// On Linux and other similar systems the threadsafe option is uselocale
	// ref: https://stackoverflow.com/questions/4057319/is-setlocale-thread-safe-function
	locale_t locale = newlocale(LC_NUMERIC_MASK, "C", NULL);
	locale_t orig_locale = uselocale(locale);
#endif
#endif

	double res = strtod(val.c_str(), &end);

	// Restore the original locale
#if defined(_WIN32)
#if !defined(_WIN32_WCE)
	setlocale(LC_NUMERIC, orig.c_str());
	_configthreadlocale(oldConfig);
#endif
#else
#if !defined(ANDROID) && !defined(__psp2__)
#endif
	uselocale(orig_locale);
	freelocale(locale);
#endif

	if( byteCount )
		*byteCount = asUINT(size_t(end - val.c_str()));

	return res;
}

// This function returns a string containing the substring of the input string
// determined by the starting index and count of characters.