Class FileTester

Object
  FileTester

public class FileTester

extends Object

Basic driver program to be used as a shell for the MiniKernel for project 5. It can be run in two modes:

Interactive:

java Boot ... FileTester

With a test script file:

java Boot ... FileTester script

To get a list of supported commands, type 'help' at the command prompt.

The testfile consists of commands to the driver program (one per line) as well as comments. Comments beginning with /* will be ignored completely by the driver. Comments beginning with // will be echoed to the output.

See the test files test*.data for examples.

Field Summary

private static String[]

helpInfo Synopsis of commands.

Constructor Summary

FileTester()

Method Summary

private static void	help() Prints a list of available commands.
private static void	help(String cmd) Prints help for command "cmd".
static void	main(String[] args) Main program.
private static void	pl(Object o) Prints a line to System.out followed by a newline.
private static void	pr(char c) Prints a character to System.out.
private static void	pr(Object o) Prints a line to System.out.
private static int	readTest(String fname, int offset, int size) Reads data from a (simulated) file using Library.read and displays the results.
private static void	showChar(int b) Display a readable representation of a byte.
private static int	writeTest(String fname, int offset, BufferedReader in) Write data to a (simulated) file using Library.write.
private static int	writeTest(String fname, int offset, int size, String data) Writes data to a (simulated) file using Library.write.

Methods inherited from class Object

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

Field Detail

helpInfo

private static String[] helpInfo

Synopsis of commands.

Constructor Detail

FileTester

public FileTester()

Method Detail

main

public static void main(String[] args)

Main program.

Parameters:

args - command-line arguments (there should be at most one: the name of a test file from which to read commands).

help

private static void help()

Prints a list of available commands.

help

private static void help(String cmd)

Prints help for command "cmd".

Parameters:

cmd - the name of the command.

readTest

private static int readTest(String fname,
                            int offset,
                            int size)

Reads data from a (simulated) file using Library.read and displays the results.

Parameters:

fname - the name of the file.

offset - the starting position in the file.

size - the number of bytes to read.

Returns:

the result of the Library.read call.

writeTest

private static int writeTest(String fname,
                             int offset,
                             int size,
                             String data)

Writes data to a (simulated) file using Library.write.

Parameters:

fname - the name of the file.

offset - the starting location in the file.

size - the number of bytes to write.

data - a source of data.

Returns:

the result of the Library.write call.

writeTest

private static int writeTest(String fname,
                             int offset,
                             BufferedReader in)

Write data to a (simulated) file using Library.write. Data comes from the following lines in the input stream.

Parameters:

fname - the name of the file.

offset - the starting offset in the file.

in - the source of data.

Returns:

the result of the Library.write call.

showChar

private static void showChar(int b)

Display a readable representation of a byte.

Parameters:

b - the byte to display as a number in the range 0..255.

pl

private static void pl(Object o)

Prints a line to System.out followed by a newline.

Parameters:

o - the message to print.

pr

private static void pr(Object o)

Prints a line to System.out.

Parameters:

o - the message to print.

pr

private static void pr(char c)

Prints a character to System.out.

Parameters:

c - the character to print.