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using System.Text;
namespace Org.BouncyCastle.Asn1.X509
{
/**
* class for breaking up an X500 Name into it's component tokens, ala
* java.util.StringTokenizer. We need this class as some of the
* lightweight Java environment don't support classes like
* StringTokenizer.
*/
public class X509NameTokenizer
{
private string value;
private int index;
private char separator;
private StringBuilder buffer = new StringBuilder();
public X509NameTokenizer(
string oid)
: this(oid, ',')
{
}
public X509NameTokenizer(
string oid,
char separator)
{
this.value = oid;
this.index = -1;
this.separator = separator;
}
public bool HasMoreTokens()
{
return index != value.Length;
}
public string NextToken()
{
if (index == value.Length)
{
return null;
}
int end = index + 1;
bool quoted = false;
bool escaped = false;
buffer.Remove(0, buffer.Length);
while (end != value.Length)
{
char c = value[end];
if (c == '"')
{
if (!escaped)
{
quoted = !quoted;
}
else
{
buffer.Append(c);
escaped = false;
}
}
else
{
if (escaped || quoted)
{
if (c == '#' && buffer[buffer.Length - 1] == '=')
{
buffer.Append('\\');
}
else if (c == '+' && separator != '+')
{
buffer.Append('\\');
}
buffer.Append(c);
escaped = false;
}
else if (c == '\\')
{
escaped = true;
}
else if (c == separator)
{
break;
}
else
{
buffer.Append(c);
}
}
end++;
}
index = end;
return buffer.ToString().Trim();
}
}
}
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