/// <summary>Estimates the length of a formatted header element.</summary>
/// <remarks>Estimates the length of a formatted header element.</remarks>
/// <param name="elem">the header element to format, or <code>null</code></param>
/// <returns>a length estimate, in number of characters</returns>
protected internal virtual int EstimateHeaderElementLen(HeaderElement elem)
{
if (elem == null)
{
return(0);
}
int result = elem.GetName().Length;
// name
string value = elem.GetValue();
if (value != null)
{
// assume quotes, but no escaped characters
result += 3 + value.Length;
}
// ="value"
int parcnt = elem.GetParameterCount();
if (parcnt > 0)
{
for (int i = 0; i < parcnt; i++)
{
result += 2 + EstimateNameValuePairLen(elem.GetParameter(i));
}
}
// ; <param>
return(result);
}
// non-javadoc, see interface HeaderValueFormatter
public virtual CharArrayBuffer FormatHeaderElement(CharArrayBuffer charBuffer, HeaderElement
elem, bool quote)
{
Args.NotNull(elem, "Header element");
int len = EstimateHeaderElementLen(elem);
CharArrayBuffer buffer = charBuffer;
if (buffer == null)
{
buffer = new CharArrayBuffer(len);
}
else
{
buffer.EnsureCapacity(len);
}
buffer.Append(elem.GetName());
string value = elem.GetValue();
if (value != null)
{
buffer.Append('=');
DoFormatValue(buffer, value, quote);
}
int parcnt = elem.GetParameterCount();
if (parcnt > 0)
{
for (int i = 0; i < parcnt; i++)
{
buffer.Append("; ");
FormatNameValuePair(buffer, elem.GetParameter(i), quote);
}
}
return(buffer);
}
