1 files changed, 113 insertions, 0 deletions
diff --git a/libjava/java/io/ByteArrayInputStream.java b/libjava/java/io/ByteArrayInputStream.java
new file mode 100644
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+++ b/libjava/java/io/ByteArrayInputStream.java
@@ -0,0 +1,113 @@
+/* Copyright (C) 1998, 1999  Cygnus Solutions
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+ 
+package java.io;
+
+/**
+ * @author Warren Levy <warrenl@cygnus.com>
+ * @date October 7, 1998.  
+ */ 
+
+/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
+ * "The Java Language Specification", ISBN 0-201-63451-1
+ * plus online API docs for JDK 1.2 beta from http://www.javasoft.com.
+ * Status:  Believed complete and correct
+ */
+ 
+public class ByteArrayInputStream extends InputStream
+{
+  /* An array of bytes provided by the creator of the stream. */
+  protected byte[] buf;
+
+  /* Position of the next byte in buf to be read. */
+  protected int pos;
+
+  /* The currently marked position in the stream. */
+  protected int mark;
+
+  /* The index in buf one greater than the last valid character. */
+  protected int count;
+
+  public ByteArrayInputStream(byte[] buffer)
+  {
+    this(buffer, 0, buffer.length);
+  }
+
+  public ByteArrayInputStream(byte[] buffer, int offset, int length)
+  {
+    buf = buffer;
+
+    count = offset + length;
+    if (count > buf.length)
+      count = buf.length;
+
+    pos = offset;
+    // TBD: What should we do if pos is neg. or > count?  E.g. throw exc. or:
+    // if (pos < 0 || pos > count)
+    //   pos = 0;
+
+    mark = pos;
+  }
+
+  public synchronized int available()
+  {
+    return count - pos;
+  }
+
+  public synchronized void mark(int readAheadLimit)
+  {
+    // readAheadLimit is ignored per Java Class Lib. book, p.220.
+    mark = pos;
+  }
+
+  public boolean markSupported()
+  {
+    return true;
+  }
+
+  public synchronized int read()
+  {
+    if (pos < 0)
+      throw new ArrayIndexOutOfBoundsException(pos);
+
+    if (pos < count)
+      return ((int) buf[pos++]) & 0xFF;
+    return -1;
+  }
+
+  public synchronized int read(byte[] b, int off, int len)
+  {
+    /* Don't need to check pos value, arraycopy will check it. */
+    if (off < 0 || len < 0 || off + len > b.length)
+      throw new ArrayIndexOutOfBoundsException();
+
+    if (pos >= count)
+      return -1;
+
+    int numBytes = Math.min(count - pos, len);
+    System.arraycopy(buf, pos, b, off, numBytes);
+    pos += numBytes;
+    return numBytes;
+  }
+
+  public synchronized void reset()
+  {
+    pos = mark;
+  }
+
+  public synchronized long skip(long n)
+  {
+    // Even though the var numBytes is a long, in reality it can never
+    // be larger than an int since the result of subtracting 2 positive
+    // ints will always fit in an int.  Since we have to return a long
+    // anyway, numBytes might as well just be a long.
+    long numBytes = Math.min((long) (count - pos), n < 0 ? 0L : n);
+    pos += numBytes;
+    return numBytes;
+  }
+}