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defang, posted Fri Jul 24, 2015 8:00 pm (6589)

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Hello, I was trying to replace textures in Witcher 3. They are in texture.cache files. I tried QuickBMS, it works on small files from DLCs. But it failed when I tried export textures from main pack which was about 3.9GB. So I tried OffZip. It exported textures, and PackZip was able to import them back. But again, only small archives were ok. Big archive failed with "-seek offset....Invalid argument". So I checked your code and found this: you are using "fseek()" which cant work with files bigger than 2GB. I replaced it with "fseeko64()" and it works.

Code:

packzip.c
71:  u32     offset      = 0,      ->  unsigned long long     offset      = 0x0,
138:     case 'o': offset        = get_num(argv[  i]);   break;       ->             case 'o': offset        = strtoull(argv[  i],NULL,0);   break;
179:fprintf(stderr, 
        "- offset        0xx\n"
        "- windowbits    %d\n",
        offset, wbits);

    if(offset) {
        fprintf(stderr, "- seek offset\n");
        if(fseek(fdo, offset, SEEK_SET)) std_err();
    }
    
    
    
    ->
    
    ?    fprintf(stderr, 
        "- offset        %llx\n",
        
        offset);
fprintf(stderr, 
       
        "- windowbits    %d\n"
        ,wbits);
    //fseek();
   if(offset) {
        fprintf(stderr, "- seek offset\n");
        if(fseeko64(fdo, offset, SEEK_SET)) std_err();
    }

So, OffZip/PackZip can modify Witcher 3 textures.

aluigi, posted Sat Jul 25, 2015 8:36 pm (6627)

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Yeah you are right, differently than other tools like offzip and quickbms, packzip doesn't have the support for big files.
I guess the reason is simply because the last times I updated it was in 2013 and 2011
Anyway no problem, I will copy&paste the needed code from offzip and then I will release the new version.
Thanks.

It's strange that quickbms fails with that cache file, I remember that there were some problems but then I found a good way to handle that file.

aluigi, posted Sun Jul 26, 2015 11:49 am (6635)

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I have just released packzip 0.3.1:
http://aluigi.org/mytoolz.htm#packzip