initial commit

1 files changed, 313 insertions, 0 deletions

diff --git a/src/com/nis/nmsclient/util/file/BufferedRandomAccessFile.java b/src/com/nis/nmsclient/util/file/BufferedRandomAccessFile.java
new file mode 100644
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--- /dev/null
+++ b/src/com/nis/nmsclient/util/file/BufferedRandomAccessFile.java
@@ -0,0 +1,313 @@
+package com.nis.nmsclient.util.file;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.util.ResourceBundle;
+
+/**
+ * <p>Title: BufferedRandomAccessFile</p>
+ * <p>Description: this class provide Buffered Read & Write by extend RandomAccessFile</p>
+ * <p>Copyright: Copyright (c) 2002 Cui Zhixiang </p>
+ * <p>Company: soho </p>
+ * @author Cui Zhixiang
+ * @version 1.0, 2002/10/12
+ */
+
+public class BufferedRandomAccessFile extends RandomAccessFile {
+
+    static ResourceBundle res = ResourceBundle.getBundle(Res.class.getName());
+    private static final int DEFAULT_BUFFER_BIT_LEN = 10;
+    private static final int DEFAULT_BUFFER_SIZE = 1 << DEFAULT_BUFFER_BIT_LEN;
+
+    protected byte buf[];
+    protected int bufbitlen;
+    protected int bufsize;
+    protected long bufmask;
+    protected boolean bufdirty;
+    protected int bufusedsize;
+    protected long curpos;
+
+    protected long bufstartpos;
+    protected long bufendpos;
+    protected long fileendpos;
+
+    protected boolean append;
+    protected String filename;
+    protected long initfilelen;
+
+    public BufferedRandomAccessFile(String name) throws  IOException {
+        this(name, res.getString("r"), DEFAULT_BUFFER_BIT_LEN);
+    }
+
+    public BufferedRandomAccessFile(File file) throws IOException, FileNotFoundException {
+        this(file.getPath(), res.getString("r"), DEFAULT_BUFFER_BIT_LEN);
+    }
+
+    public BufferedRandomAccessFile(String name, int bufbitlen) throws  IOException {
+        this(name, res.getString("r"), bufbitlen);
+    }
+
+    public BufferedRandomAccessFile(File file, int bufbitlen) throws IOException, FileNotFoundException {
+        this(file.getPath(), res.getString("r"), bufbitlen);
+    }
+
+    public BufferedRandomAccessFile(String name, String mode) throws IOException {
+        this(name, mode, DEFAULT_BUFFER_BIT_LEN);
+    }
+
+    public BufferedRandomAccessFile(File file, String mode) throws IOException, FileNotFoundException {
+        this(file.getPath(), mode, DEFAULT_BUFFER_BIT_LEN);
+    }
+
+    public BufferedRandomAccessFile(String name, String mode, int bufbitlen) throws IOException  {
+        super(name, mode);
+        this.init(name, mode, bufbitlen);
+    }
+
+    public BufferedRandomAccessFile(File file, String mode, int bufbitlen) throws IOException, FileNotFoundException {
+        this(file.getPath(), mode, bufbitlen);
+    }
+
+    private void init(String name, String mode, int bufbitlen) throws IOException {
+        if (mode.equals(res.getString("r")) == true) {
+            this.append = false;
+        } else {
+            this.append = true;
+        }
+
+        this.filename = name;
+        this.initfilelen = super.length();
+        this.fileendpos = this.initfilelen - 1;
+        this.curpos = super.getFilePointer();
+
+        if (bufbitlen < 0) {
+            throw new IllegalArgumentException(res.getString("bufbitlen_size_must_0"));
+        }
+
+        this.bufbitlen = bufbitlen;
+        this.bufsize = 1 << bufbitlen;
+        this.buf = new byte[this.bufsize];
+        this.bufmask = ~((long)this.bufsize - 1L);
+        this.bufdirty = false;
+        this.bufusedsize = 0;
+        this.bufstartpos = -1;
+        this.bufendpos = -1;
+    }
+
+    private void flushbuf() throws IOException {
+        if (this.bufdirty == true) {
+            if (super.getFilePointer() != this.bufstartpos) {
+                super.seek(this.bufstartpos);
+            }
+            super.write(this.buf, 0, this.bufusedsize);
+            this.bufdirty = false;
+        }
+    }
+
+    private int fillbuf() throws IOException {
+        super.seek(this.bufstartpos);
+        this.bufdirty = false;
+        return super.read(this.buf);
+    }
+
+    public byte read(long pos) throws IOException {
+        if (pos < this.bufstartpos || pos > this.bufendpos) {
+            this.flushbuf();
+            this.seek(pos);
+
+            if ((pos < this.bufstartpos) || (pos > this.bufendpos)) {
+                throw new IOException();
+            }
+        }
+        this.curpos = pos;
+        return this.buf[(int)(pos - this.bufstartpos)];
+    }
+
+    public boolean write(byte bw) throws IOException {
+        return this.write(bw, this.curpos);
+    }
+
+    public boolean append(byte bw) throws IOException {
+        return this.write(bw, this.fileendpos + 1);
+    }
+
+    public boolean write(byte bw, long pos) throws IOException {
+
+        if ((pos >= this.bufstartpos) && (pos <= this.bufendpos)) { // write pos in buf
+            this.buf[(int)(pos - this.bufstartpos)] = bw;
+            this.bufdirty = true;
+
+            if (pos == this.fileendpos + 1) { // write pos is append pos
+                this.fileendpos++;
+                this.bufusedsize++;
+            }
+        } else { // write pos not in buf
+            this.seek(pos);
+
+            if ((pos >= 0) && (pos <= this.fileendpos) && (this.fileendpos != 0)) { // write pos is modify file
+                this.buf[(int)(pos - this.bufstartpos)] = bw;
+
+            } else if (((pos == 0) && (this.fileendpos == 0)) || (pos == this.fileendpos + 1)) { // write pos is append pos
+                this.buf[0] = bw;
+                this.fileendpos++;
+                this.bufusedsize = 1;
+            } else {
+                throw new IndexOutOfBoundsException();
+            }
+            this.bufdirty = true;
+        }
+        this.curpos = pos;
+        return true;
+    }
+
+    public void write(byte b[], int off, int len) throws IOException {
+
+        long writeendpos = this.curpos + len - 1;
+
+        if (writeendpos <= this.bufendpos) { // b[] in cur buf
+            System.arraycopy(b, off, this.buf, (int)(this.curpos - this.bufstartpos), len);
+            this.bufdirty = true;
+            this.bufusedsize = (int)(writeendpos - this.bufstartpos + 1);//(int)(this.curpos - this.bufstartpos + len - 1);
+
+        } else { // b[] not in cur buf
+            super.seek(this.curpos);
+            super.write(b, off, len);
+        }
+
+        if (writeendpos > this.fileendpos)
+            this.fileendpos = writeendpos;
+
+        this.seek(writeendpos+1);
+    }
+
+    public int read(byte b[], int off, int len) throws IOException {
+
+        long readendpos = this.curpos + len - 1;
+
+        if (readendpos <= this.bufendpos && readendpos <= this.fileendpos ) { // read in buf
+            System.arraycopy(this.buf, (int)(this.curpos - this.bufstartpos), b, off, len);
+        } else { // read b[] size > buf[]
+
+            if (readendpos > this.fileendpos) { // read b[] part in file
+                len = (int)(this.length() - this.curpos + 1);
+            }
+
+            super.seek(this.curpos);
+            len = super.read(b, off, len);
+            readendpos = this.curpos + len - 1;
+        }
+        this.seek(readendpos + 1);
+        return len;
+    }
+
+    public void write(byte b[]) throws IOException {
+        this.write(b, 0, b.length);
+    }
+
+    public int read(byte b[]) throws IOException {
+        return this.read(b, 0, b.length);
+    }
+
+    public void seek(long pos) throws IOException {
+
+        if ((pos < this.bufstartpos) || (pos > this.bufendpos)) { // seek pos not in buf
+            this.flushbuf();
+
+            if ((pos >= 0) && (pos <= this.fileendpos) && (this.fileendpos != 0)) { // seek pos in file (file length > 0)
+                this.bufstartpos =  pos & this.bufmask;
+                this.bufusedsize = this.fillbuf();
+
+            } else if (((pos == 0) && (this.fileendpos == 0)) || (pos == this.fileendpos + 1)) { // seek pos is append pos
+
+                this.bufstartpos = pos;
+                this.bufusedsize = 0;
+            }
+            this.bufendpos = this.bufstartpos + this.bufsize - 1;
+        }
+        this.curpos = pos;
+    }
+
+    public long length() throws IOException {
+        return this.max(this.fileendpos + 1, this.initfilelen);
+    }
+
+    public void setLength(long newLength) throws IOException {
+        if (newLength > 0) {
+            this.fileendpos = newLength - 1;
+        } else {
+            this.fileendpos = 0;
+        }
+        super.setLength(newLength);
+    }
+    public long getFilePointer() throws IOException {
+        return this.curpos;
+    }
+
+    private long max(long a, long b) {
+        if (a > b) return a;
+        return b;
+    }
+
+    public void close() throws IOException {
+        this.flushbuf();
+        super.close();
+    }
+
+    public static void main(String[] args) throws IOException {
+        long readfilelen = 0;
+        BufferedRandomAccessFile brafReadFile, brafWriteFile;
+
+        brafReadFile = new BufferedRandomAccessFile("C:\\WINNT\\Fonts\\STKAITI.TTF");
+        readfilelen = brafReadFile.initfilelen;
+        brafWriteFile = new BufferedRandomAccessFile(".\\STKAITI.001", "rw", 10);
+
+        byte buf[] = new byte[1024];
+        int readcount;
+
+        long start = System.currentTimeMillis();
+
+        while((readcount = brafReadFile.read(buf)) != -1) {
+            brafWriteFile.write(buf, 0, readcount);
+        }
+
+        brafWriteFile.close();
+        brafReadFile.close();
+
+        System.out.println("BufferedRandomAccessFile Copy & Write File: "
+                           + brafReadFile.filename
+                           + "    FileSize: "
+                           + java.lang.Integer.toString((int)readfilelen >> 1024)
+                           + " (KB)    "
+                           + "Spend: "
+                           +(double)(System.currentTimeMillis()-start) / 1000
+                           + "(s)");
+
+        java.io.FileInputStream fdin = new java.io.FileInputStream("C:\\WINNT\\Fonts\\STKAITI.TTF");
+        java.io.BufferedInputStream bis = new java.io.BufferedInputStream(fdin, 1024);
+        java.io.DataInputStream dis = new java.io.DataInputStream(bis);
+
+        java.io.FileOutputStream fdout = new java.io.FileOutputStream(".\\STKAITI.002");
+        java.io.BufferedOutputStream bos = new java.io.BufferedOutputStream(fdout, 1024);
+        java.io.DataOutputStream dos = new java.io.DataOutputStream(bos);
+
+        start = System.currentTimeMillis();
+
+        for (int i = 0; i < readfilelen; i++) {
+            dos.write(dis.readByte());
+        }
+
+        dos.close();
+        dis.close();
+
+        System.out.println("DataBufferedios Copy & Write File: "
+                           + brafReadFile.filename
+                           + "    FileSize: "
+                           + java.lang.Integer.toString((int)readfilelen >> 1024)
+                           + " (KB)    "
+                           + "Spend: "
+                           + (double)(System.currentTimeMillis()-start) / 1000
+                           + "(s)");
+    }
+}