lzwScript

lzwScript

contents ::

  App.java
  BitStreamInputStream.java
  BitStreamOutputStream.java
  lzwScript
  input

#!/bin/bash
# Run this file from your ex9 package directory
#
# Set up a directory inside your ex9 directory with your test files in it
#
# Change the variables below to reflect your directory names
#
# This script will take each of the files
# located in the tests directory,
# and run your compress program on it.
# It will then display the size of the compressed file
# and indicate whether the LZW has made the file
# larger or smaller than the original

# Change this to suit your directory structure
ROOTDIR=$JAVA_DEV_ROOT/src/jlittle_ex9

# Directory your LZW Compress program is in
COMPRESSDIR=$ROOTDIR/compress

# Directory your LZW Decompress program is in
DECOMPRESSDIR=$ROOTDIR/decompress

# Directory your test files are in
TESTDIR=$ROOTDIR/LZWtests

# Directory to store temporary files
TEMPDIR=$ROOTDIR/LZWtemp

# The Script
# --------------------------------------------------------
# DO NOT ALTER THIS UNLESS YOU KNOW WHAT YOU ARE DOING !!!
# --------------------------------------------------------

# Create the temp directory
mkdir $TEMPDIR

# Make your compress program
echo ----------------------------------------------------------------
echo Making compression program......
echo

cd $COMPRESSDIR
make -s

cd $TESTDIR

echo Now compress each test file and compare size to orginal
echo

# for each test file compress and compare size to original
for testfile in `ls`
do
    # Get the original size
    origsize=`ls -l | grep " ${testfile}$" | awk '{print $5} ;'`
    # Header for report
    echo $testfile
    echo ------------------------------
    echo Original Size: '  '$origsize

    # perform compression
    cd $COMPRESSDIR

    make run < ${TESTDIR}/${testfile} > ${TEMPDIR}/${testfile}

    cd $TEMPDIR

    # get the new size
    compsize=`ls -l | grep " $testfile$" | awk '{print $5} ;'`

    # compare and output
    if [ $origsize == $compsize ]
    then
        echo Compressed Size: $compsize = Same size
    else
        if [ $origsize -gt $compsize ]
        then
            echo Compressed Size: $compsize = Reduction in size
        else
            echo Compressed Size: $compsize = Increase in size
        fi
    fi
    cd $TESTDIR
    echo
done

# Make your decompression program
echo ---------------------------------------------------------------------
echo Making decompression program......

cd $DECOMPRESSDIR
make -s

echo
echo Now decompress each file and compare to orginal...........
echo

# See if decompression results in original file.
for testfile in `ls $TEMPDIR`
do
    make run < ${TEMPDIR}/${testfile} > ${TEMPDIR}/${testfile}.tmp.txt

    # Find the difference
    diff ${TEMPDIR}/${testfile}.tmp.txt ${TESTDIR}/${testfile} > /dev/null

    # output result
    if [ $? -eq 0 ]; then
        echo Compress / Decompress successful for $testfile
    else
        echo Compress / Decompress UNSUCCESSFUL for $testfile
    fi

    # remove temporary file
    rm -f ${TEMPDIR}/${testfile}.tmp.txt
done

# remove temporary directory
rm -rf $TEMPDIR

# end script
#
# Peter Eaton
# 23/4/01
# For cosc241 students

James Little