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src/java.base/share/classes/java/io/ByteArrayInputStream.java
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*** 1,7 ****
/*
! * Copyright (c) 1994, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
--- 1,7 ----
/*
! * Copyright (c) 1994, 2017, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
*** 23,76 ****
* questions.
*/
package java.io;
/**
! * A <code>ByteArrayInputStream</code> contains
* an internal buffer that contains bytes that
* may be read from the stream. An internal
* counter keeps track of the next byte to
! * be supplied by the <code>read</code> method.
* <p>
* Closing a {@code ByteArrayInputStream} has no effect. The methods in
* this class can be called after the stream has been closed without
* generating an {@code IOException}.
*
* @author Arthur van Hoff
* @see java.io.StringBufferInputStream
* @since 1.0
*/
! public
! class ByteArrayInputStream extends InputStream {
/**
* An array of bytes that was provided
! * by the creator of the stream. Elements <code>buf[0]</code>
! * through <code>buf[count-1]</code> are the
* only bytes that can ever be read from the
! * stream; element <code>buf[pos]</code> is
* the next byte to be read.
*/
protected byte buf[];
/**
* The index of the next character to read from the input stream buffer.
* This value should always be nonnegative
! * and not larger than the value of <code>count</code>.
* The next byte to be read from the input stream buffer
! * will be <code>buf[pos]</code>.
*/
protected int pos;
/**
* The currently marked position in the stream.
* ByteArrayInputStream objects are marked at position zero by
* default when constructed. They may be marked at another
! * position within the buffer by the <code>mark()</code> method.
* The current buffer position is set to this point by the
! * <code>reset()</code> method.
* <p>
* If no mark has been set, then the value of mark is the offset
* passed to the constructor (or 0 if the offset was not supplied).
*
* @since 1.1
--- 23,78 ----
* questions.
*/
package java.io;
+ import java.util.Arrays;
+ import java.util.Objects;
+
/**
! * A {@code ByteArrayInputStream} contains
* an internal buffer that contains bytes that
* may be read from the stream. An internal
* counter keeps track of the next byte to
! * be supplied by the {@code read} method.
* <p>
* Closing a {@code ByteArrayInputStream} has no effect. The methods in
* this class can be called after the stream has been closed without
* generating an {@code IOException}.
*
* @author Arthur van Hoff
* @see java.io.StringBufferInputStream
* @since 1.0
*/
! public class ByteArrayInputStream extends InputStream {
/**
* An array of bytes that was provided
! * by the creator of the stream. Elements {@code buf[0]}
! * through {@code buf[count-1]} are the
* only bytes that can ever be read from the
! * stream; element {@code buf[pos]} is
* the next byte to be read.
*/
protected byte buf[];
/**
* The index of the next character to read from the input stream buffer.
* This value should always be nonnegative
! * and not larger than the value of {@code count}.
* The next byte to be read from the input stream buffer
! * will be {@code buf[pos]}.
*/
protected int pos;
/**
* The currently marked position in the stream.
* ByteArrayInputStream objects are marked at position zero by
* default when constructed. They may be marked at another
! * position within the buffer by the {@code mark()} method.
* The current buffer position is set to this point by the
! * {@code reset()} method.
* <p>
* If no mark has been set, then the value of mark is the offset
* passed to the constructor (or 0 if the offset was not supplied).
*
* @since 1.1
*** 79,120 ****
/**
* The index one greater than the last valid character in the input
* stream buffer.
* This value should always be nonnegative
! * and not larger than the length of <code>buf</code>.
* It is one greater than the position of
! * the last byte within <code>buf</code> that
* can ever be read from the input stream buffer.
*/
protected int count;
/**
! * Creates a <code>ByteArrayInputStream</code>
! * so that it uses <code>buf</code> as its
* buffer array.
* The buffer array is not copied.
! * The initial value of <code>pos</code>
! * is <code>0</code> and the initial value
! * of <code>count</code> is the length of
! * <code>buf</code>.
*
* @param buf the input buffer.
*/
public ByteArrayInputStream(byte buf[]) {
this.buf = buf;
this.pos = 0;
this.count = buf.length;
}
/**
! * Creates <code>ByteArrayInputStream</code>
! * that uses <code>buf</code> as its
! * buffer array. The initial value of <code>pos</code>
! * is <code>offset</code> and the initial value
! * of <code>count</code> is the minimum of <code>offset+length</code>
! * and <code>buf.length</code>.
* The buffer array is not copied. The buffer's mark is
* set to the specified offset.
*
* @param buf the input buffer.
* @param offset the offset in the buffer of the first byte to read.
--- 81,122 ----
/**
* The index one greater than the last valid character in the input
* stream buffer.
* This value should always be nonnegative
! * and not larger than the length of {@code buf}.
* It is one greater than the position of
! * the last byte within {@code buf} that
* can ever be read from the input stream buffer.
*/
protected int count;
/**
! * Creates a {@code ByteArrayInputStream}
! * so that it uses {@code buf} as its
* buffer array.
* The buffer array is not copied.
! * The initial value of {@code pos}
! * is {@code 0} and the initial value
! * of {@code count} is the length of
! * {@code buf}.
*
* @param buf the input buffer.
*/
public ByteArrayInputStream(byte buf[]) {
this.buf = buf;
this.pos = 0;
this.count = buf.length;
}
/**
! * Creates {@code ByteArrayInputStream}
! * that uses {@code buf} as its
! * buffer array. The initial value of {@code pos}
! * is {@code offset} and the initial value
! * of {@code count} is the minimum of {@code offset+length}
! * and {@code buf.length}.
* The buffer array is not copied. The buffer's mark is
* set to the specified offset.
*
* @param buf the input buffer.
* @param offset the offset in the buffer of the first byte to read.
*** 127,186 ****
this.mark = offset;
}
/**
* Reads the next byte of data from this input stream. The value
! * byte is returned as an <code>int</code> in the range
! * <code>0</code> to <code>255</code>. If no byte is available
* because the end of the stream has been reached, the value
! * <code>-1</code> is returned.
* <p>
! * This <code>read</code> method
* cannot block.
*
! * @return the next byte of data, or <code>-1</code> if the end of the
* stream has been reached.
*/
public synchronized int read() {
return (pos < count) ? (buf[pos++] & 0xff) : -1;
}
/**
! * Reads up to <code>len</code> bytes of data into an array of bytes
* from this input stream.
! * If <code>pos</code> equals <code>count</code>,
! * then <code>-1</code> is returned to indicate
! * end of file. Otherwise, the number <code>k</code>
* of bytes read is equal to the smaller of
! * <code>len</code> and <code>count-pos</code>.
! * If <code>k</code> is positive, then bytes
! * <code>buf[pos]</code> through <code>buf[pos+k-1]</code>
! * are copied into <code>b[off]</code> through
! * <code>b[off+k-1]</code> in the manner performed
! * by <code>System.arraycopy</code>. The
! * value <code>k</code> is added into <code>pos</code>
! * and <code>k</code> is returned.
* <p>
! * This <code>read</code> method cannot block.
*
* @param b the buffer into which the data is read.
! * @param off the start offset in the destination array <code>b</code>
* @param len the maximum number of bytes read.
* @return the total number of bytes read into the buffer, or
! * <code>-1</code> if there is no more data because the end of
* the stream has been reached.
! * @exception NullPointerException If <code>b</code> is <code>null</code>.
! * @exception IndexOutOfBoundsException If <code>off</code> is negative,
! * <code>len</code> is negative, or <code>len</code> is greater than
! * <code>b.length - off</code>
*/
public synchronized int read(byte b[], int off, int len) {
! if (b == null) {
! throw new NullPointerException();
! } else if (off < 0 || len < 0 || len > b.length - off) {
! throw new IndexOutOfBoundsException();
! }
if (pos >= count) {
return -1;
}
--- 129,184 ----
this.mark = offset;
}
/**
* Reads the next byte of data from this input stream. The value
! * byte is returned as an {@code int} in the range
! * {@code 0} to {@code 255}. If no byte is available
* because the end of the stream has been reached, the value
! * {@code -1} is returned.
* <p>
! * This {@code read} method
* cannot block.
*
! * @return the next byte of data, or {@code -1} if the end of the
* stream has been reached.
*/
public synchronized int read() {
return (pos < count) ? (buf[pos++] & 0xff) : -1;
}
/**
! * Reads up to {@code len} bytes of data into an array of bytes
* from this input stream.
! * If {@code pos} equals {@code count},
! * then {@code -1} is returned to indicate
! * end of file. Otherwise, the number {@code k}
* of bytes read is equal to the smaller of
! * {@code len} and {@code count-pos}.
! * If {@code k} is positive, then bytes
! * {@code buf[pos]} through {@code buf[pos+k-1]}
! * are copied into {@code b[off]} through
! * {@code b[off+k-1]} in the manner performed
! * by {@code System.arraycopy}. The
! * value {@code k} is added into {@code pos}
! * and {@code k} is returned.
* <p>
! * This {@code read} method cannot block.
*
* @param b the buffer into which the data is read.
! * @param off the start offset in the destination array {@code b}
* @param len the maximum number of bytes read.
* @return the total number of bytes read into the buffer, or
! * {@code -1} if there is no more data because the end of
* the stream has been reached.
! * @throws NullPointerException If {@code b} is {@code null}.
! * @throws IndexOutOfBoundsException If {@code off} is negative,
! * {@code len} is negative, or {@code len} is greater than
! * {@code b.length - off}
*/
public synchronized int read(byte b[], int off, int len) {
! Objects.checkFromIndexSize(off, len, b.length);
if (pos >= count) {
return -1;
}
*** 194,211 ****
System.arraycopy(buf, pos, b, off, len);
pos += len;
return len;
}
/**
! * Skips <code>n</code> bytes of input from this input stream. Fewer
* bytes might be skipped if the end of the input stream is reached.
! * The actual number <code>k</code>
* of bytes to be skipped is equal to the smaller
! * of <code>n</code> and <code>count-pos</code>.
! * The value <code>k</code> is added into <code>pos</code>
! * and <code>k</code> is returned.
*
* @param n the number of bytes to be skipped.
* @return the actual number of bytes skipped.
*/
public synchronized long skip(long n) {
--- 192,227 ----
System.arraycopy(buf, pos, b, off, len);
pos += len;
return len;
}
+ public synchronized byte[] readAllBytes() {
+ byte[] result = Arrays.copyOfRange(buf, pos, count);
+ pos = count;
+ return result;
+ }
+
+ public synchronized int readNBytes(byte[] b, int off, int len) {
+ int n = read(b, off, len);
+ return n == -1 ? 0 : n;
+ }
+
+ public synchronized long transferTo(OutputStream out) throws IOException {
+ int pos0 = pos;
+ out.write(buf, pos, count - pos);
+ pos = count;
+ return count - pos0;
+ }
+
/**
! * Skips {@code n} bytes of input from this input stream. Fewer
* bytes might be skipped if the end of the input stream is reached.
! * The actual number {@code k}
* of bytes to be skipped is equal to the smaller
! * of {@code n} and {@code count-pos}.
! * The value {@code k} is added into {@code pos}
! * and {@code k} is returned.
*
* @param n the number of bytes to be skipped.
* @return the actual number of bytes skipped.
*/
public synchronized long skip(long n) {
*** 220,243 ****
/**
* Returns the number of remaining bytes that can be read (or skipped over)
* from this input stream.
* <p>
! * The value returned is <code>count - pos</code>,
* which is the number of bytes remaining to be read from the input buffer.
*
* @return the number of remaining bytes that can be read (or skipped
* over) from this input stream without blocking.
*/
public synchronized int available() {
return count - pos;
}
/**
! * Tests if this <code>InputStream</code> supports mark/reset. The
! * <code>markSupported</code> method of <code>ByteArrayInputStream</code>
! * always returns <code>true</code>.
*
* @since 1.1
*/
public boolean markSupported() {
return true;
--- 236,259 ----
/**
* Returns the number of remaining bytes that can be read (or skipped over)
* from this input stream.
* <p>
! * The value returned is {@code count - pos},
* which is the number of bytes remaining to be read from the input buffer.
*
* @return the number of remaining bytes that can be read (or skipped
* over) from this input stream without blocking.
*/
public synchronized int available() {
return count - pos;
}
/**
! * Tests if this {@code InputStream} supports mark/reset. The
! * {@code markSupported} method of {@code ByteArrayInputStream}
! * always returns {@code true}.
*
* @since 1.1
*/
public boolean markSupported() {
return true;
*** 251,261 ****
* <p>
* If no mark has been set, then the value of the mark is the
* offset passed to the constructor (or 0 if the offset was not
* supplied).
*
! * <p> Note: The <code>readAheadLimit</code> for this class
* has no meaning.
*
* @since 1.1
*/
public void mark(int readAheadLimit) {
--- 267,277 ----
* <p>
* If no mark has been set, then the value of the mark is the
* offset passed to the constructor (or 0 if the offset was not
* supplied).
*
! * <p> Note: The {@code readAheadLimit} for this class
* has no meaning.
*
* @since 1.1
*/
public void mark(int readAheadLimit) {
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