.zip, .tar, .tar.gz?

This is a discussion on .zip, .tar, .tar.gz? within the C++ Programming forums, part of the General Programming Boards category; Is there something in STL that allows me to decompress archives in this format? If not, what is the absolute ...

  1. #1
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    .zip, .tar, .tar.gz?

    Is there something in STL that allows me to decompress archives in this format?

    If not, what is the absolute easiest library that can?

    Thanks!
    FlyingIsFun1217

  2. #2
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    those are files, you would have to write a program to decompress them which is a waste of time given there are things like 7-zip which decompresses all those file formats.

    The most the stl will give you is ifstream and ofstream and you'd have to figure out the rest yourself.

  3. #3
    Frequently Quite Prolix dwks's Avatar
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    The standard C++ library does not include any archive utilities. Boost does, or you can use some other library. I don't know of any offhand, try google.
    dwk

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  4. #4
    Cat without Hat CornedBee's Avatar
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    Boost doesn't have archive utilities either, just compression.
    All the buzzt!
    CornedBee

    "There is not now, nor has there ever been, nor will there ever be, any programming language in which it is the least bit difficult to write bad code."
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  5. #5
    Frequently Quite Prolix dwks's Avatar
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    Erhm, yes, sorry. I haven't actually used it myself, so I don't know about the details. http://www.boost.org/libs/iostreams/doc/index.html
    dwk

    Seek and ye shall find. quaere et invenies.

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    I would think boost would be overkill. there's zlib though, which does exactly what you want.

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    Quote Originally Posted by robwhit View Post
    I would think boost would be overkill. there's zlib though, which does exactly what you want.
    Yes, I saw zlib. Only thing is, it seems kinda confusing for what it is. Which is why I mentioned the easy part in the first post.

    Thanks for the help, anything else?
    FlyingIsFun1217

  8. #8
    Frequently Quite Prolix dwks's Avatar
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    zlib is probably about as "easy" as you're going to get. You could look at the manual, which I'm sure you have already done. There's also a How-To of sorts (for C).
    dwk

    Seek and ye shall find. quaere et invenies.

    "Simplicity does not precede complexity, but follows it." -- Alan Perlis
    "Testing can only prove the presence of bugs, not their absence." -- Edsger Dijkstra
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    of course, there's the system() way... but not very good.

  10. #10
    Frequently Quite Prolix dwks's Avatar
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    But very easy.
    Code:
    system("gunzip file.txt.gz");
    or whatever the command is on your system.

    Using system() is slow, unportable, and sometimes unsecure. But it would let you uncompress a file by executing another program quite easily.

    Rather than system(), you could also use some other platform-specific function to execute your compression program: http://faq.cprogramming.com/cgi-bin/...&id=1043284392
    dwk

    Seek and ye shall find. quaere et invenies.

    "Simplicity does not precede complexity, but follows it." -- Alan Perlis
    "Testing can only prove the presence of bugs, not their absence." -- Edsger Dijkstra
    "The only real mistake is the one from which we learn nothing." -- John Powell


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    Wow... too bad you guys didn't post earlier. I've found the 'cure' to be such!

    Here's How I set it up:

    Code:
    system("cd /usr/share/themes");
    system("gunzip "<<location4<<"");
    system("tar xf "<<location4<<"");
    As you can probably tell though, this gives me errors:

    error: no match for 'operator<<' in '" gunzip" << location4'
    Hmm. Whats wrong here? Somebody had to know...

    And this is going to be a program specific to Xubuntu, so portability is not an issue.

    Thanks again!
    FlyingIsFun1217

  12. #12
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    Code:
                    string location4;
    		char yes_or_no3;
    
    		cout<<"Enter the location of your zipped (.tar.gz) theme: ";
    
    		cin>>location4;
    		cin.ignore();
    
    		cout<<"\n\nUnzipping and installing...\n";
    		system("cd /usr/share/themes");
    		system("gunzip "<<location4<<"");
    		system("tar xf "<<location4<<"");
    
    		cout<<"Done! Please use the Theme Selector to apply!";
    		cout<<"Would you like to delete "<<location4<<"? (Y/N): ";
    
    		cin>>yes_or_no3;
    		cin.ignore();
    
    		if (yes_or_no3 == "Y")
    		{
    			cout<<"Deleting "<<location4<<"...\n";
    			remove(location4);
    			cout<<"Successfully deleted "<<location4<<"!";
    		}
    
    		else
    		{
    			return 1;
    		}
    This is my usage, BTW.

    FlyingIsFun1217

  13. #13
    Registered User Frobozz's Avatar
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    Here's an example showing how to load a bitmap from a zip and display it in SDL. Shouldn't be too hard to figure out how to use zlib from this.

    http://gpwiki.org/index.php/SDL:Tuto...RWops_and_zlib

  14. #14
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    Quote Originally Posted by Frobozz View Post
    Here's an example showing how to load a bitmap from a zip and display it in SDL. Shouldn't be too hard to figure out how to use zlib from this.

    http://gpwiki.org/index.php/SDL:Tuto...RWops_and_zlib
    Thanks, but like I said, I've decided to use the system() method.

    My problem still stands, how come I cant use <<string_variable<< in the system command?

    Thanks!
    FlyingIsFun1217

  15. #15
    Cat without Hat CornedBee's Avatar
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    Because << doesn't concatenate strings. + does.
    All the buzzt!
    CornedBee

    "There is not now, nor has there ever been, nor will there ever be, any programming language in which it is the least bit difficult to write bad code."
    - Flon's Law

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