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Reading and writing data using the 'bin:' format Description This example shows how to generate and read data files using
the 'bin:' data format from a C (bdrv.c) or a java (bdrv.java)
program. Further explanation of this example: 'BinDrv library reference manual'
Source Files By clicking on a file name, a preview is opened at the bottom of this page.
bdrv.java
/********************************************************/
/* BinDrv library example */
/* ====================== */
/* */
/* file bdrv.java */
/* `````````````` */
/* Example of use of BinDrv */
/* */
/* (c) 2011 Fair Isaac Corporation */
/* author: Y. Colombani, 2011 */
/********************************************************/
import java.io.*;
import java.nio.*;
import com.dashoptimization.*;
public class bdrv
{
public static void main(String[] args) throws Exception
{
ByteBuffer buf=ByteBuffer.allocate(128);
writeIt();
readIt();
writeIt(buf);
buf.rewind();
readIt(buf);
}
/*****************************/
/* Create a BinDrv data file */
/*****************************/
static void writeIt() throws IOException
{
BinDrvWriter bdrv;
FileOutputStream f;
byte[] data={1,2,3,4,5,6,7,8};
f=new FileOutputStream("bindata");
bdrv=new BinDrvWriter(f);
bdrv.putControl(bdrv.CTRL_LABEL).put("A");
bdrv.putControl(bdrv.CTRL_OPENLST);
bdrv.putControl(bdrv.CTRL_OPENNDX).put(1).putControl(bdrv.CTRL_CLOSENDX);
bdrv.put(0.45).put(-31.02).put(-123);
bdrv.putControl(bdrv.CTRL_CLOSELST);
bdrv.putControl(bdrv.CTRL_LABEL).put("B").put(true);
bdrv.putControl(bdrv.CTRL_LABEL).put("C").put("sometext");
bdrv.putControl(bdrv.CTRL_LABEL).put("D").put(Long.MAX_VALUE/2);
bdrv.putControl(bdrv.CTRL_LABEL).put("E").put(data);
f.close();
}
/***************************************/
/* Read and display a BinDrv data file */
/***************************************/
static void readIt() throws IOException
{
BinDrvReader bdrv;
FileInputStream f;
f=new FileInputStream("bindata");
bdrv=new BinDrvReader(f);
while(bdrv.nextToken()>=0)
{
switch(bdrv.nextToken())
{
case BinDrvReader.TYP_INT:
System.out.print(" "+bdrv.getInt());
break;
case BinDrvReader.TYP_DATA:
{
byte[] data;
data=bdrv.getData();
System.out.print(" ");
if(data!=null)
{
for(int i=0;i<data.length;i++)
System.out.print(String.format("%02x",data[i]));
}
break;
}
case BinDrvReader.TYP_REAL:
System.out.print(" "+bdrv.getReal());
break;
case BinDrvReader.TYP_STR:
System.out.print(" "+bdrv.getString());
break;
case BinDrvReader.TYP_BOOL:
System.out.print(" "+bdrv.getBoolean());
break;
case BinDrvReader.TYP_CTRL:
switch(bdrv.getControl())
{
case BinDrvReader.CTRL_SKIP: System.out.print(" *"); break;
case BinDrvReader.CTRL_LABEL: System.out.print("\n"+bdrv.getString()+":"); break;
case BinDrvReader.CTRL_OPENLST: System.out.print("["); break;
case BinDrvReader.CTRL_CLOSELST: System.out.print("]"); break;
case BinDrvReader.CTRL_OPENNDX: System.out.print("("); break;
case BinDrvReader.CTRL_CLOSENDX: System.out.print(")"); break;
case BinDrvReader.CTRL_NIL: System.out.print(" ?"); break;
default:
System.out.println("Unexpected Control");
System.exit(0);
}
break;
case BinDrvReader.TYP_LONG:
System.out.print(" "+bdrv.getLong());
break;
default:
System.out.println("Unexpected token: "+bdrv.nextToken());
System.exit(0);
}
}
f.close();
System.out.println("");
}
/*******************************/
/* Create a BinDrv data buffer */
/*******************************/
static void writeIt(ByteBuffer buf)
{
byte[] data={1,2,3,4,5,6,7,8};
BinDrvWriter.putControl(buf,BinDrvWriter.CTRL_LABEL);
BinDrvWriter.put(buf,"A");
BinDrvWriter.putControl(buf,BinDrvWriter.CTRL_OPENLST);
BinDrvWriter.putControl(buf,BinDrvWriter.CTRL_OPENNDX);
BinDrvWriter.put(buf,1);
BinDrvWriter.putControl(buf,BinDrvWriter.CTRL_CLOSENDX);
BinDrvWriter.put(buf,0.45);
BinDrvWriter.put(buf,-31.02);
BinDrvWriter.put(buf,-123);
BinDrvWriter.putControl(buf,BinDrvWriter.CTRL_CLOSELST);
BinDrvWriter.putControl(buf,BinDrvWriter.CTRL_LABEL);
BinDrvWriter.put(buf,"B");
BinDrvWriter.put(buf,true);
BinDrvWriter.putControl(buf,BinDrvWriter.CTRL_LABEL);
BinDrvWriter.put(buf,"C");
BinDrvWriter.put(buf,"sometext");
BinDrvWriter.putControl(buf,BinDrvWriter.CTRL_LABEL);
BinDrvWriter.put(buf,"D");
BinDrvWriter.put(buf,Long.MAX_VALUE/2);
BinDrvWriter.putControl(buf,BinDrvWriter.CTRL_LABEL);
BinDrvWriter.put(buf,"E");
BinDrvWriter.put(buf,data);
buf.limit(buf.position());
}
/*****************************************/
/* Read and display a BinDrv data buffer */
/*****************************************/
static void readIt(ByteBuffer buf) throws IOException
{
while(BinDrvReader.nextToken(buf)>=0)
{
switch(BinDrvReader.nextToken(buf))
{
case BinDrvReader.TYP_INT:
System.out.print(" "+BinDrvReader.getInt(buf));
break;
case BinDrvReader.TYP_DATA:
{
byte[] data;
data=BinDrvReader.getData(buf);
System.out.print(" ");
if(data!=null)
{
for(int i=0;i<data.length;i++)
System.out.print(String.format("%02x",data[i]));
}
break;
}
case BinDrvReader.TYP_REAL:
System.out.print(" "+BinDrvReader.getReal(buf));
break;
case BinDrvReader.TYP_STR:
System.out.print(" "+BinDrvReader.getString(buf));
break;
case BinDrvReader.TYP_BOOL:
System.out.print(" "+BinDrvReader.getBoolean(buf));
break;
case BinDrvReader.TYP_CTRL:
switch(BinDrvReader.getControl(buf))
{
case BinDrvReader.CTRL_SKIP: System.out.print(" *"); break;
case BinDrvReader.CTRL_LABEL: System.out.print("\n"+BinDrvReader.getString(buf)+":"); break;
case BinDrvReader.CTRL_OPENLST: System.out.print("["); break;
case BinDrvReader.CTRL_CLOSELST: System.out.print("]"); break;
case BinDrvReader.CTRL_OPENNDX: System.out.print("("); break;
case BinDrvReader.CTRL_CLOSENDX: System.out.print(")"); break;
case BinDrvReader.CTRL_NIL: System.out.print(" ?"); break;
default:
System.out.println("Unexpected Control");
System.exit(0);
}
break;
case BinDrvReader.TYP_LONG:
System.out.print(" "+BinDrvReader.getLong(buf));
break;
default:
System.out.println("Unexpected token: "+BinDrvReader.nextToken(buf));
System.exit(0);
}
}
System.out.println("");
}
}
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| © Copyright 2024 Fair Isaac Corporation. |
