/**
* Reads characters into a portion of an array.
*
* @param aBuf Destination buffer
* @param nOfs Offset at which to start writing characters
* @param nLen Maximum number of characters to read
* @return The number of characters read, or -1 if the end of the stream has been reached
* @exception IOException If an I/O error occurs
*/
@Override
@CheckForSigned
public int read(
@Nonnull final char[] aBuf, @Nonnegative final int nOfs, @Nonnegative final int nLen)
throws IOException {
_ensureOpen();
ValueEnforcer.isArrayOfsLen(aBuf, nOfs, nLen);
if (nLen == 0) return 0;
if (m_nNext >= m_nLength) return -1;
final int nChars = Math.min(m_nLength - m_nNext, nLen);
m_sStr.getChars(m_nNext, m_nNext + nChars, aBuf, nOfs);
m_nNext += nChars;
return nChars;
}
/**
* Write a portion of an array of characters.
*
* @param aBuf Array of characters
* @param nOfs Offset from which to start writing characters
* @param nLen Number of characters to write
*/
@Override
public void write(
@Nonnull final char[] aBuf, @Nonnegative final int nOfs, @Nonnegative final int nLen) {
ValueEnforcer.isArrayOfsLen(aBuf, nOfs, nLen);
if (nLen > 0) m_aSB.append(aBuf, nOfs, nLen);
}