Memory input stream (Simplified version of ReReadableInputStream, which accepts byte array)

trunk/src/com/jpexs/helpers/MemoryInputStream.java

@@ -0,0 +1,76 @@
+/*
+ *  Copyright (C) 2010-2013 JPEXS
+ * 
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ * 
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ * 
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.jpexs.helpers;
+
+import com.jpexs.helpers.streams.SeekableInputStream;
+import java.io.IOException;
+
+/**
+ *
+ * @author JPEXS
+ */
+public class MemoryInputStream extends SeekableInputStream {
+
+    byte[] buffer;
+    long pos = 0;
+    int count = 0;
+
+    public MemoryInputStream(byte[] buffer) {
+        this.buffer = buffer;
+    }
+
+    public int getCount() {
+        return count;
+    }
+
+    public byte[] getAllRead() {
+        return buffer;
+    }
+
+    public long getPos() {
+        return pos;
+    }
+
+    @Override
+    public void seek(long pos) throws IOException {
+        this.pos = pos;
+    }
+
+    @Override
+    public int read() throws IOException {
+        if (pos > count) {
+            count = (int) pos;
+        }
+        
+        if (pos < buffer.length) {
+            int ret = buffer[(int) pos] & 0xff;
+            pos++;
+            return ret;
+        }
+
+        return -1;
+    }
+
+    @Override
+    public int available() throws IOException {
+        return buffer.length - (int) pos;
+    }
+
+    public long length() throws IOException {
+        return buffer.length;
+    }
+}