/// <summary> Convert the value to a number.
///
/// See ECMA 9.3.
/// </summary>
public static double ToNumber (object val)
{
for (; ; ) {
if (val is double)
return (double)val;
if (CliHelper.IsNumber (val))
return Convert.ToDouble (val);
if (val == null)
return +0.0;
if (val == Undefined.Value)
return double.NaN;
if (val is string)
return ToNumber ((string)val);
if (val is bool)
return ((bool)val) ? 1 : +0.0;
if (val is IScriptable) {
val = ((IScriptable)val).GetDefaultValue (typeof (long));
if (val is IScriptable)
throw ScriptRuntime.errorWithClassName ("msg.primitive.expected", val);
continue;
}
ScriptRuntime.WarnAboutNonJSObject (val);
return double.NaN;
}
}
/// <summary> Convert the value to a boolean.
///
/// See ECMA 9.2.
/// </summary>
public static bool ToBoolean (object val)
{
for (; ; ) {
if (val is bool)
return ((bool)val);
if (val == null || val == Undefined.Value)
return false;
if (val is string)
return ((string)val).Length != 0;
if (CliHelper.IsNumber (val)) {
double d = Convert.ToDouble (val);
return (!double.IsNaN (d) && d != 0.0);
}
if (val is IScriptable) {
if (Context.CurrentContext.VersionECMA1) {
// pure ECMA
return true;
}
// ECMA extension
val = ((IScriptable)val).GetDefaultValue (typeof (bool));
if (val is IScriptable)
throw ScriptRuntime.errorWithClassName ("msg.primitive.expected", val);
continue;
}
ScriptRuntime.WarnAboutNonJSObject (val);
return true;
}
}
