Package ghidra.framework.main.logviewer.model

Class ReverseLineReader

java.lang.Object

ghidra.framework.main.logviewer.model.ReverseLineReader

public class ReverseLineReader
extends Object

Reads in a single line of text from a given input file, in reverse order. CONOPS: 1. Start at a given position in the file and read BUFFER_SIZE bytes into a byte array 2. From the end of the array, read a character 3. If the character represents a newline (or carriage return), the line is finished, so return. 4. If not, continue reading.

Field Summary

Fields

Modifier and Type	Field	Description
RandomAccessFile	raf

Constructor Summary

Constructors

Constructor	Description
ReverseLineReader(String encoding, RandomAccessFile raf)

Method Summary

Modifier and Type	Method	Description
String	readLine()	Reads a single line from the current file pointer position, in reverse.
void	setFilePos(long position)	Moves the file pointer to the given byte location.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

raf

public RandomAccessFile raf

Constructor Details

ReverseLineReader

public ReverseLineReader(String encoding,
 RandomAccessFile raf)
                  throws IOException

Parameters:

encoding -

raf -

Throws:

IOException

Method Details

setFilePos

public void setFilePos(long position)

Moves the file pointer to the given byte location.

Parameters:

position -

readLine

public String readLine()
                throws IOException

Reads a single line from the current file pointer position, in reverse. To do this we do the following: 1. Read a 'large enough' number of bytes into a buffer (enough to guarantee a full line of text. 2. Move backwards through the bytes just read until a newline or carriage return is found. 3. Throw away the rest of the bytes and return the line found.

Returns:

Throws:

IOException