/// <summary>
/// Base64-encode the given data and return a newly allocated
/// byte[] with the result.
/// </summary>
/// <remarks>
/// Base64-encode the given data and return a newly allocated
/// byte[] with the result.
/// </remarks>
/// <param name="input">the data to encode</param>
/// <param name="offset">
/// the position within the input array at which to
/// start
/// </param>
/// <param name="len">the number of bytes of input to encode</param>
/// <param name="flags">
/// controls certain features of the encoded output.
/// Passing
/// <code>DEFAULT</code>
/// results in output that
/// adheres to RFC 2045.
/// </param>
public static byte[] Encode(byte[] input, int offset, int len, int flags)
{
Base64.Encoder encoder = new Base64.Encoder(flags, null);
// Compute the exact length of the array we will produce.
int output_len = len / 3 * 4;
// Account for the tail of the data and the padding bytes, if any.
if (encoder.do_padding)
{
if (len % 3 > 0)
{
output_len += 4;
}
}
else
{
switch (len % 3)
{
case 0:
{
break;
}
case 1:
{
output_len += 2;
break;
}
case 2:
{
output_len += 3;
break;
}
}
}
// Account for the newlines, if any.
if (encoder.do_newline && len > 0)
{
output_len += (((len - 1) / (3 * Base64.Encoder.LineGroups)) + 1) * (encoder.do_cr
? 2 : 1);
}
encoder.output = new byte[output_len];
encoder.Process(input, offset, len, true);
System.Diagnostics.Debug.Assert(encoder.op == output_len);
return(encoder.output);
}
/// <summary>
/// Base64-encode the given data and return a newly allocated
/// byte[] with the result.
/// </summary>
/// <remarks>
/// Base64-encode the given data and return a newly allocated
/// byte[] with the result.
/// </remarks>
/// <param name="input">the data to encode</param>
/// <param name="offset">
/// the position within the input array at which to
/// start
/// </param>
/// <param name="len">the number of bytes of input to encode</param>
/// <param name="flags">
/// controls certain features of the encoded output.
/// Passing
/// <code>DEFAULT</code>
/// results in output that
/// adheres to RFC 2045.
/// </param>
public static byte[] Encode(byte[] input, int offset, int len, int flags)
{
Base64.Encoder encoder = new Base64.Encoder(flags, null);
// Compute the exact length of the array we will produce.
int output_len = len / 3 * 4;
// Account for the tail of the data and the padding bytes, if any.
if (encoder.do_padding)
{
if (len % 3 > 0)
{
output_len += 4;
}
}
else
{
switch (len % 3)
{
case 0:
{
break;
}
case 1:
{
output_len += 2;
break;
}
case 2:
{
output_len += 3;
break;
}
}
}
// Account for the newlines, if any.
if (encoder.do_newline && len > 0)
{
output_len += (((len - 1) / (3 * Base64.Encoder.LineGroups)) + 1) * (encoder.do_cr
? 2 : 1);
}
encoder.output = new byte[output_len];
encoder.Process(input, offset, len, true);
System.Diagnostics.Debug.Assert(encoder.op == output_len);
return encoder.output;
}
