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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.IdentityModel
{
using System.IO;
using System.Security.Cryptography;
using System.Text;
using System.Xml;
abstract class CanonicalFormWriter
{
internal static readonly UTF8Encoding Utf8WithoutPreamble = new UTF8Encoding(false);
protected static void Base64EncodeAndWrite(Stream stream, byte[] workBuffer, char[] base64WorkBuffer, byte[] data)
{
if ((data.Length / 3) * 4 + 4 > base64WorkBuffer.Length)
{
EncodeAndWrite(stream, Convert.ToBase64String(data));
return;
}
int encodedLength = Convert.ToBase64CharArray(data, 0, data.Length, base64WorkBuffer, 0, Base64FormattingOptions.None);
EncodeAndWrite(stream, workBuffer, base64WorkBuffer, encodedLength);
}
protected static void EncodeAndWrite(Stream stream, byte[] workBuffer, string s)
{
if (s.Length > workBuffer.Length)
{
EncodeAndWrite(stream, s);
return;
}
for (int i = 0; i < s.Length; i++)
{
char c = s[i];
if (c < 127)
{
workBuffer[i] = (byte) c;
}
else
{
EncodeAndWrite(stream, s);
return;
}
}
stream.Write(workBuffer, 0, s.Length);
}
protected static void EncodeAndWrite(Stream stream, byte[] workBuffer, char[] chars)
{
EncodeAndWrite(stream, workBuffer, chars, chars.Length);
}
protected static void EncodeAndWrite(Stream stream, byte[] workBuffer, char[] chars, int count)
{
if (count > workBuffer.Length)
{
EncodeAndWrite(stream, chars, count);
return;
}
for (int i = 0; i < count; i++)
{
char c = chars[i];
if (c < 127)
{
workBuffer[i] = (byte) c;
}
else
{
EncodeAndWrite(stream, chars, count);
return;
}
}
stream.Write(workBuffer, 0, count);
}
static void EncodeAndWrite(Stream stream, string s)
{
byte[] buffer = CanonicalFormWriter.Utf8WithoutPreamble.GetBytes(s);
stream.Write(buffer, 0, buffer.Length);
}
static void EncodeAndWrite(Stream stream, char[] chars, int count)
{
byte[] buffer = CanonicalFormWriter.Utf8WithoutPreamble.GetBytes(chars, 0, count);
stream.Write(buffer, 0, buffer.Length);
}
}
}
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