private Token ByteArrayToken()
{
StringBuilder strBuilder = new StringBuilder();
for (; ; Read())
{
if (char.IsDigit(Lookahead))
{
strBuilder.Append(Lookahead);
}
else
{
break;
}
}
int length = Convert.ToInt32(strBuilder.ToString());
strBuilder.Remove(0, strBuilder.Length);
length *= 2;
if (Lookahead == ':')
{
Read();
for (int count = 0; count < length; Read())
{
if (ByteArrayValue.IsHex(Lookahead))
{
strBuilder.Append(Lookahead);
count++;
}
else if (Lookahead == '\u000A') // '\n' LF
{
Line++;
}
else if (Lookahead == '\u0009' || // '\t' HT
Lookahead == '\u000D' || // '\r' CR
Lookahead == '\u0020') // ' ' SP
{
continue;
}
else if (Lookahead == ';')
{
while (true)
{
Read();
if (Lookahead == '\u000A') // '\n' LF
{
Line++;
break;
}
else if (Lookahead == '\0')
{
break;
}
}
}
else
{
throw new Exception("Lexical analyzer line " + Line.ToString() + ": Found a non-hexadecimal value.");
}
}
}
else
{
throw new Exception("Lexical analyzer line " + Line.ToString() + ": The ':' character of starting an byte array was expected.");
}
return(new ByteArrayValue(strBuilder.ToString(), KeyLabel.ByteArray));
}
private Token IntToken()
{
StringBuilder strBuilder = new StringBuilder();
if (Lookahead == '0')
{
Read();
if (Lookahead == 'x')
{
Read();
if (ByteArrayValue.IsHex(Lookahead))
{
strBuilder.Append(Lookahead);
Read();
for (int count = 1; ; Read())
{
if (ByteArrayValue.IsHex(Lookahead))
{
strBuilder.Append(Lookahead);
}
else
{
break;
}
if (count > 7)
{
throw new Exception("Lexical analyzer line " + Line.ToString() + ": Detected a hexadecimal number of more than 32 bits.");
}
count++;
}
return(new IntValue(Convert.ToInt32(strBuilder.ToString(), 16), KeyLabel.IntHEX));
}
else
{
throw new Exception("Lexical analyzer line " + Line.ToString() + ": A hexadecimal number was expected.");
}
}
else if (char.IsDigit(Lookahead))
{
throw new Exception("Lexical analyzer line " + Line.ToString() + ": A number that starts with zero is invalid.");
}
else
{
return(new IntValue(0, KeyLabel.IntDEC));
}
}
else
{
strBuilder.Append(Lookahead);
Read();
for (; ; Read())
{
if (char.IsDigit(Lookahead))
{
strBuilder.Append(Lookahead);
}
else
{
break;
}
}
return(new IntValue(Convert.ToInt32(strBuilder.ToString()), KeyLabel.IntDEC));
}
}
