Name: rlT66838 Date: 08/18/97


I use FileOutputStream to read a file written in
 KSC5601 code( YES, I use Korean Windows 95. )
When I write more than 8K bytes, I lost 8193th byte.
No error message. I tested at JDK 1.1.1 and 1.1.3.

Here is the source code.

[ start of File IOLine.java ]

import java.io.*;
import java.util.*;

public class IOLine{
FileOutputStream fos;
FileInputStream fis;
OutputStreamWriter osw;
InputStreamReader isw;

StringBuffer strBuf = new StringBuffer();
char ch;
File file;
int last = 0;
int tempint = 0;

public final static int READ = 1;
public final static int WRITE = 2;
private int MODE = 0;

public IOLine(String fileName, String mode) throws IOException{
if(mode.equalsIgnoreCase("rw")){
fos = new FileOutputStream( fileName );
osw = new OutputStreamWriter( fos );
MODE = WRITE;
}else{
fis = new FileInputStream( fileName );
isw = new InputStreamReader( fis );
MODE = READ;
}
}

public String readLine() throws IOException{
strBuf.setLength(0);
try{
while(true){
tempint = isw.read();
ch = (char)tempint;
if(tempint == -1){
if(last == -1)
return null;
else {
last = -1;
return (strBuf.toString() + " ");
}
}
if(ch == '\n'){
return strBuf.toString();
}
if(ch != '\r')
strBuf.append(ch);
}
}catch(IOException e){
throw new IOException();
}
}

public void close() throws IOException{
if(MODE == WRITE){
osw.close();
fos.close();
}else{
isw.close();
fis.close();
}
}

int bugCount = 0;
byte[] bugBuffer;

public void writeLine(String str) throws IOException{

osw.write(str+"\r\n", 0,str.length()+2);
}

public void write(String str) throws IOException{

osw.write(str, 0,str.length());
}

}

[ end of File IOLine.java ]

[ start of File IOLineTest.java ]

import java.io.*;

public class IOLineTest{

public static void main( String argv[] ){
try{
IOLine io = new IOLine( "text.txt", "rw" );
for( int i=0; i < 2000; i++ ){
io.write( "123456789\n" );
}
io.close();
}catch( IOException ioe ){}
}


}

[ end of File IOLineTest.java ]

How to see the bug...
    1. Excute "IOLineTest.class".
       It will make "text.txt" file
       which has 10 bytes per line.

    2. Load "text.txt" with any text file viewer.
       Find a line which is differ from other lines.
       ( maybe 820th line. )
       It maybe look like this.
             "12456789" <-- No "3".

Please Fix this BUG. If possible, give me a patch
for this or the way avoid this bug.


company - JAZZNET Korea , email - ###@###.###
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