Function ResultToBOOL

source/script2.cpp:16779–16798

////////////////////////////////////////////////////////

BOOL ResultToBOOL(LPTSTR aResult)
{
	UINT c1 = (UINT)*aResult; // UINT vs. UCHAR might squeeze a little more performance out of it.
	if (c1 > 48)     // Any UCHAR greater than '0' can't be a space(32), tab(9), '+'(43), or '-'(45), or '.'(46)...
		return TRUE; // ...so any string starting with c1>48 can't be anything that's false (e.g. " 0", "+0", "-0", ".0", "0").
	if (!c1 // Besides performance, must be checked anyway because otherwise IsNumeric() would consider "" to be non-numeric and thus TRUE.
		|| c1 == 48 && !aResult[1]) // The string "0" seems common enough to detect explicitly, for performance.
		return FALSE;
	// IsNumeric() is called below because there are many variants of a false string:
	// e.g. "0", "0.0", "0x0", ".0", "+0", "-0", and " 0" (leading spaces/tabs).
	switch (IsNumeric(aResult, true, false, true)) // It's purely numeric and not all whitespace (and due to earlier check, it's not blank).
	{
	case PURE_INTEGER: return ATOI64(aResult) != 0; // Could call ATOF() for both integers and floats; but ATOI64() probably performs better, and a float comparison to 0.0 might be a slower than an integer comparison to 0.
	case PURE_FLOAT:   return _tstof(aResult) != 0.0; // atof() vs. ATOF() because PURE_FLOAT is never hexadecimal.
	default: // PURE_NOT_NUMERIC.
		// Even a string containing all whitespace would be considered non-numeric since it's a non-blank string
		// that isn't equal to 0.
		return TRUE;
	}
}