/// <summary>
/// 16 進定数を読み込みます。16 進定数は #h の形式で記述し、h は 4 桁の 16 進数
/// (16 進数字は 0 ~ 9, A ~ F) です。
/// </summary>
/// <param name="buffer">読み込む文字列が入った <see cref="ReadBuffer"/> のオブジェクトです。</param>
/// <returns>読み込んだ <see cref="Int32"/> の値を返します。</returns>
internal static Int32 Read(ReadBuffer buffer)
{
Int32 parseStartIndex = buffer.CurrentIndex;
buffer.SkipExpected(Casl2Defs.Sharp);
Int32 digitCount = 0;
Int32 value = GetValue(buffer, out digitCount);
if (digitCount != DigitCount)
{
String hexStr = buffer.GetToCurrent(parseStartIndex);
String message = String.Format(
Resources.MSG_InvalidHexConstantDigitCount, hexStr, DigitCount, digitCount);
throw new Casl2SimulatorException(message);
}
return(value);
}
private static IEnumerable <Char> ReadChars(ReadBuffer buffer)
{
Int32 parseStartIndex = buffer.CurrentIndex;
buffer.SkipExpected(Casl2Defs.SingleQuote);
for ( ; ;)
{
if (buffer.Current == ReadBuffer.EndOfStr)
{
String str = buffer.GetToCurrent(parseStartIndex);
String message = String.Format(Resources.MSG_NoCloseQuoteInStrConstant, str);
throw new Casl2SimulatorException(message);
}
Char?c = ReadChar(buffer);
if (c == null)
{
break;
}
yield return(c.Value);
}
}