| Methods Summary |
|---|
| public int | available()Returns the number of bytes that are available before this stream will
block. This implementation always returns 0. Subclasses should override
and indicate the correct number of bytes available.
return 0;
|
| public void | close()Closes this stream. Concrete implementations of this class should free
any resources during close. This implementation does nothing.
/* empty */
|
| public void | mark(int readlimit)Sets a mark position in this InputStream. The parameter {@code readlimit}
indicates how many bytes can be read before the mark is invalidated.
Sending {@code reset()} will reposition the stream back to the marked
position provided {@code readLimit} has not been surpassed.
This default implementation does nothing and concrete subclasses must
provide their own implementation.
/* empty */
|
| public boolean | markSupported()Indicates whether this stream supports the {@code mark()} and
{@code reset()} methods. The default implementation returns {@code false}.
return false;
|
| public abstract int | read()Reads a single byte from this stream and returns it as an integer in the
range from 0 to 255. Returns -1 if the end of the stream has been
reached. Blocks until one byte has been read, the end of the source
stream is detected or an exception is thrown.
|
| public int | read(byte[] b)Reads bytes from this stream and stores them in the byte array {@code b}.
// BEGIN android-note
// changed array notation to be consistent with the rest of harmony
// END android-note
return read(b, 0, b.length);
|
| public int | read(byte[] b, int offset, int length)Reads at most {@code length} bytes from this stream and stores them in
the byte array {@code b} starting at {@code offset}.
// BEGIN android-note
// changed array notation to be consistent with the rest of harmony
// END android-note
// avoid int overflow, check null b
// BEGIN android-changed
// Exception priorities (in case of multiple errors) differ from
// RI, but are spec-compliant.
// removed redundant check, made implicit null check explicit,
// used (offset | length) < 0 instead of (offset < 0) || (length < 0)
// to safe one operation
if (b == null) {
throw new NullPointerException(Msg.getString("K0047")); //$NON-NLS-1$
}
if ((offset | length) < 0 || length > b.length - offset) {
throw new ArrayIndexOutOfBoundsException(Msg.getString("K002f")); //$NON-NLS-1$
}
// END android-changed
for (int i = 0; i < length; i++) {
int c;
try {
if ((c = read()) == -1) {
return i == 0 ? -1 : i;
}
} catch (IOException e) {
if (i != 0) {
return i;
}
throw e;
}
b[offset + i] = (byte)c;
}
return length;
|
| public synchronized void | reset()Resets this stream to the last marked location. Throws an
{@code IOException} if the number of bytes read since the mark has been
set is greater than the limit provided to {@code mark}, or if no mark
has been set.
This implementation always throws an {@code IOException} and concrete
subclasses should provide the proper implementation.
throw new IOException();
|
| public long | skip(long n)Skips at most {@code n} bytes in this stream. It does nothing and returns
0 if {@code n} is negative. Less than {@code n} characters are skipped if
the end of this stream is reached before the operation completes.
This default implementation reads {@code n} bytes into a temporary
buffer. Concrete subclasses should provide their own implementation.
if (n <= 0) {
return 0;
}
long skipped = 0;
int toRead = n < 4096 ? (int) n : 4096;
if (skipBuf == null || skipBuf.length < toRead) {
skipBuf = new byte[toRead];
}
while (skipped < n) {
int read = read(skipBuf, 0, toRead);
if (read == -1) {
return skipped;
}
skipped += read;
if (read < toRead) {
return skipped;
}
if (n - skipped < toRead) {
toRead = (int) (n - skipped);
}
}
return skipped;
|
