/**
* Grow a byte buffer, so it has a minimal capacity or at least
* the double capacity of the original buffer
*
* @param b The original buffer.
* @param newCapacity The minimal requested new capacity.
* @return A byte buffer <code>r</code> with
* <code>r.capacity() = max(b.capacity()*2,newCapacity)</code> and
* all the data contained in <code>b</code> copied to the beginning
* of <code>r</code>.
*
*/
internal static java.nio.ByteBuffer growBuffer(java.nio.ByteBuffer b, int newCapacity)
{
b.limit(b.position());
b.rewind();
int c2 = b.capacity() * 2;
java.nio.ByteBuffer on = java.nio.ByteBuffer.allocate(c2 < newCapacity ? newCapacity : c2);
on.put(b);
return(on);
}
/**
* @see
* org.apache.commons.compress.archivers.zip.ZipEncoding#encode(java.lang.String)
*/
public java.nio.ByteBuffer encode(String name)
{
java.nio.charset.CharsetEncoder enc = this.charset.newEncoder();
enc.onMalformedInput(java.nio.charset.CodingErrorAction.REPORT);
enc.onUnmappableCharacter(java.nio.charset.CodingErrorAction.REPORT);
java.nio.CharBuffer cb = java.nio.CharBuffer.wrap(name);
java.nio.ByteBuffer outJ = java.nio.ByteBuffer.allocate(name.length()
+ (name.length() + 1) / 2);
while (cb.remaining() > 0)
{
java.nio.charset.CoderResult res = enc.encode(cb, outJ, true);
if (res.isUnmappable() || res.isMalformed())
{
// write the unmappable characters in utf-16
// pseudo-URL encoding style to ByteBuffer.
if (res.length() * 6 > outJ.remaining())
{
outJ = ZipEncodingHelper.growBuffer(outJ, outJ.position()
+ res.length() * 6);
}
for (int i = 0; i < res.length(); ++i)
{
ZipEncodingHelper.appendSurrogate(outJ, cb.get());
}
}
else if (res.isOverflow())
{
outJ = ZipEncodingHelper.growBuffer(outJ, 0);
}
else if (res.isUnderflow())
{
enc.flush(outJ);
break;
}
}
outJ.limit(outJ.position());
outJ.rewind();
return(outJ);
}
/**
* @see
* org.apache.commons.compress.archivers.zip.ZipEncoding#encode(java.lang.String)
*/
public java.nio.ByteBuffer encode(String name)
{
java.nio.ByteBuffer outJ = java.nio.ByteBuffer.allocate(name.length()
+ 6 + (name.length() + 1) / 2);
for (int i = 0; i < name.length(); ++i)
{
char c = name.charAt(i);
if (outJ.remaining() < 6)
{
outJ = ZipEncodingHelper.growBuffer(outJ, outJ.position() + 6);
}
if (!this.pushEncodedChar(outJ, c))
{
ZipEncodingHelper.appendSurrogate(outJ, c);
}
}
outJ.limit(outJ.position());
outJ.rewind();
return(outJ);
}
