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/*
* Unpack -- a completely non-object oriented utility...
*
*/
import java.io.*;
class Unpack
{
static final int IDPAKHEADER= (('K' << 24) + ('C' << 16) + ('A' << 8) + 'P');
static int intSwap(int i)
{
int a, b, c, d;
a= i & 255;
b= (i >> 8) & 255;
c= (i >> 16) & 255;
d= (i >> 24) & 255;
return (a << 24) + (b << 16) + (c << 8) + d;
}
static boolean patternMatch(String pattern, String s)
{
int index;
int remaining;
if (pattern.equals(s))
{
return true;
}
// fairly lame single wildcard matching
index= pattern.indexOf('*');
if (index == -1)
{
return false;
}
if (!pattern.regionMatches(0, s, 0, index))
{
return false;
}
index += 1; // skip the *
remaining= pattern.length() - index;
if (s.length() < remaining)
{
return false;
}
if (!pattern.regionMatches(index, s, s.length() - remaining, remaining))
{
return false;
}
return true;
}
static void usage()
{
System.out.println("Usage: unpack <packfile> <match> <basedir>");
System.out.println(" or: unpack -list <packfile>");
System.out.println("<match> may contain a single * wildcard");
System.exit(1);
}
public static void main(String[] args)
{
int ident;
int dirofs;
int dirlen;
int i;
int numLumps;
byte[] name= new byte[56];
String nameString;
int filepos;
int filelen;
RandomAccessFile readLump;
DataInputStream directory;
String pakName;
String pattern;
if (args.length == 2)
{
if (!args[0].equals("-list"))
{
usage();
}
pakName= args[1];
pattern= null;
}
else if (args.length == 3)
{
pakName= args[0];
pattern= args[1];
}
else
{
pakName= null;
pattern= null;
usage();
}
try
{
// one stream to read the directory
directory= new DataInputStream(new FileInputStream(pakName));
// another to read lumps
readLump= new RandomAccessFile(pakName, "r");
// read the header
ident= intSwap(directory.readInt());
dirofs= intSwap(directory.readInt());
dirlen= intSwap(directory.readInt());
if (ident != IDPAKHEADER)
{
System.out.println(pakName + " is not a pakfile.");
System.exit(1);
}
// read the directory
directory.skipBytes(dirofs - 12);
numLumps= dirlen / 64;
System.out.println(numLumps + " lumps in " + pakName);
for (i= 0; i < numLumps; i++)
{
directory.readFully(name);
filepos= intSwap(directory.readInt());
filelen= intSwap(directory.readInt());
nameString= new String(name);
// chop to the first 0 byte
nameString= nameString.substring(0, nameString.indexOf(0));
if (pattern == null)
{
// listing mode
System.out.println(nameString + " : " + filelen + "bytes");
}
else if (patternMatch(pattern, nameString))
{
File writeFile;
DataOutputStream writeLump;
byte[] buffer= new byte[filelen];
StringBuffer fixedString;
String finalName;
int index;
System.out.println("Unpaking " + nameString + " " + filelen + " bytes");
// load the lump
readLump.seek(filepos);
readLump.readFully(buffer);
// quake uses forward slashes, but java requires
// they only by the host's seperator, which
// varies from win to unix
fixedString= new StringBuffer(args[2] + File.separator + nameString);
for (index= 0; index < fixedString.length(); index++)
{
if (fixedString.charAt(index) == '/')
{
fixedString.setCharAt(index, File.separatorChar);
}
}
finalName= fixedString.toString();
index= finalName.lastIndexOf(File.separatorChar);
if (index != -1)
{
String finalPath;
File writePath;
finalPath= finalName.substring(0, index);
writePath= new File(finalPath);
writePath.mkdirs();
}
writeFile= new File(finalName);
writeLump= new DataOutputStream(new FileOutputStream(writeFile));
writeLump.write(buffer);
writeLump.close();
}
}
readLump.close();
directory.close();
}
catch (IOException e)
{
System.out.println(e.toString());
}
}
}
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