/// <summary>
/// Get an integer attribute value and displays an error for an illegal integer value.
/// </summary>
/// <param name="sourceLineNumbers">Source line information about the owner element.</param>
/// <param name="attribute">The attribute containing the value to get.</param>
/// <param name="minimum">The minimum legal value.</param>
/// <param name="maximum">The maximum legal value.</param>
/// <param name="messageHandler">A delegate that receives error messages.</param>
/// <returns>The attribute's integer value or a special value if an error occurred during conversion.</returns>
public static int GetAttributeIntegerValue(IMessaging messaging, SourceLineNumber sourceLineNumbers, XAttribute attribute, int minimum, int maximum)
{
Debug.Assert(minimum > CompilerConstants.IntegerNotSet && minimum > CompilerConstants.IllegalInteger, "The legal values for this attribute collide with at least one sentinel used during parsing.");
string value = Common.GetAttributeValue(messaging, sourceLineNumbers, attribute, EmptyRule.CanBeWhitespaceOnly);
int integer = CompilerConstants.IllegalInteger;
if (0 < value.Length)
{
if (Int32.TryParse(value, NumberStyles.Integer, CultureInfo.InvariantCulture.NumberFormat, out integer))
{
if (CompilerConstants.IntegerNotSet == integer || CompilerConstants.IllegalInteger == integer)
{
messaging.Write(ErrorMessages.IntegralValueSentinelCollision(sourceLineNumbers, integer));
}
else if (minimum > integer || maximum < integer)
{
messaging.Write(ErrorMessages.IntegralValueOutOfRange(sourceLineNumbers, attribute.Parent.Name.LocalName, attribute.Name.LocalName, integer, minimum, maximum));
integer = CompilerConstants.IllegalInteger;
}
}
else
{
messaging.Write(ErrorMessages.IllegalIntegerValue(sourceLineNumbers, attribute.Parent.Name.LocalName, attribute.Name.LocalName, value));
}
}
return(integer);
}
/// <summary>
/// Get an identifier attribute value and displays an error for an illegal identifier value.
/// </summary>
/// <param name="sourceLineNumbers">Source line information about the owner element.</param>
/// <param name="attribute">The attribute containing the value to get.</param>
/// <param name="messageHandler">A delegate that receives error messages.</param>
/// <returns>The attribute's identifier value or a special value if an error occurred.</returns>
internal static string GetAttributeIdentifierValue(IMessaging messaging, SourceLineNumber sourceLineNumbers, XAttribute attribute)
{
string value = Common.GetAttributeValue(messaging, sourceLineNumbers, attribute, EmptyRule.CanBeWhitespaceOnly);
if (Common.IsIdentifier(value))
{
if (72 < value.Length)
{
messaging.Write(WarningMessages.IdentifierTooLong(sourceLineNumbers, attribute.Parent.Name.LocalName, attribute.Name.LocalName, value));
}
return(value);
}
else
{
if (value.StartsWith("[", StringComparison.Ordinal) && value.EndsWith("]", StringComparison.Ordinal))
{
messaging.Write(ErrorMessages.IllegalIdentifierLooksLikeFormatted(sourceLineNumbers, attribute.Parent.Name.LocalName, attribute.Name.LocalName, value));
}
else
{
messaging.Write(ErrorMessages.IllegalIdentifier(sourceLineNumbers, attribute.Parent.Name.LocalName, attribute.Name.LocalName, value));
}
return(String.Empty);
}
}
/// <summary>
/// Gets a yes/no value and displays an error for an illegal yes/no value.
/// </summary>
/// <param name="sourceLineNumbers">Source line information about the owner element.</param>
/// <param name="attribute">The attribute containing the value to get.</param>
/// <param name="messageHandler">A delegate that receives error messages.</param>
/// <returns>The attribute's YesNoType value.</returns>
internal static YesNoType GetAttributeYesNoValue(IMessaging messaging, SourceLineNumber sourceLineNumbers, XAttribute attribute)
{
string value = Common.GetAttributeValue(messaging, sourceLineNumbers, attribute, EmptyRule.CanBeWhitespaceOnly);
YesNoType yesNo = YesNoType.IllegalValue;
if ("yes".Equals(value) || "true".Equals(value))
{
yesNo = YesNoType.Yes;
}
else if ("no".Equals(value) || "false".Equals(value))
{
yesNo = YesNoType.No;
}
else
{
messaging.Write(ErrorMessages.IllegalYesNoValue(sourceLineNumbers, attribute.Parent.Name.LocalName, attribute.Name.LocalName, value));
}
return(yesNo);
}
