73 lines
1.6 KiB
Java
73 lines
1.6 KiB
Java
package java.io;
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public abstract class InputStream
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implements Closeable {
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public InputStream() {
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}
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public int available() throws IOException {
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return 0;
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}
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public void close() throws IOException {
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}
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public void mark(int readlimit) {
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}
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public abstract int read() throws IOException;
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public int read(byte[] b) throws IOException {
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return read(b, 0, b.length);
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}
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public int read(byte[] b,
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int off,
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int len) throws IOException {
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if (off < 0 || len < 0 || len > b.length - off)
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throw new IndexOutOfBoundsException();
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if (b == null)
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throw new NullPointerException();
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for (int i = 0; i < len; i++) {
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try {
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int c = read();
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boolean endOfStream = c == -1;
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if (endOfStream) {
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if (i == 0)
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return -1;
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else
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return i;
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}
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b[off + i] = (byte)c;
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} catch (IOException e) {
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if (i == 0)
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throw e;
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else
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return i;
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}
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}
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return len;
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}
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public void reset() throws IOException {
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throw new IOException();
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}
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public long skip(long n)
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throws IOException {
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long ni = n;
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while (ni > 0L) {
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int b = read();
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if (b < 0)
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break;
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ni -= 1;
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}
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return n - ni;
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}
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}
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