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Closed 10 years ago.
How could I embed or associate an .exe into an ordinary file, like .jpeg or any video etc.
? I want to associate the opening of the ordinary file with the execution of an executable program.
What you're trying to do is intended not to be possible. If and when it does happen, it takes place by exploiting a flaw in the program reading the file. This might take place (this is more common when the program is written in C or C++) by storing out-of-range values in the headers and hoping the program does not validate them before using them as offsets in memory, or (this is more common in higher-level languages) by taking advantage of a logical error in some overgrown feature the format intentionally allows (like embedding javascript).
Beyond this, I think any further answer is off-topic on SO. This is not a site for getting help writing malware.
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Closed 10 years ago.
Is there any way to get data removed metadata(for example, ID3) from mp3 file with Objective-C, C++, or C?
there are similar function in PHP.
Unfortunately not. Use a library (For ID3, there are library implementations listed on ID3.org).
If for some reason you cannot use a library, removing a single ID3 tag from a file is quite a trivial process (search for the characters 'ID3' and then look at the header to get the tag size in bytes (details of the header found here). The tag will be contiguous so you can just remove it using a file descriptor.
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Closed 9 years ago.
I'm sure there must be something like this somewhere but I can't seem to find anything useful on here or Google. I had hoped Boost might have something but alas not.
What I'm after is a lightweight library that can take a string from the user, for example "y=2x+3" and parse it returning an object or function which returns y when given x.
Can anybody recommend something for this? (Worst case I could write one myself but no point reinventing the wheel and all.)
Things which can be assumed if necessary;
Preset variable names
Number of variables fixed
MuParser is all you ever could wish for. You can even define custom operators, store and evaluate the expressions in binary form, etc... Written in C++, bindings for C and C# (and maybe even other languages).
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Closed 11 years ago.
Are there some cases where it may not be a good idea to use the code of an open source project even though your company might allow you to do so?
Some cases that I think might be valid are:
The code may be implemented in a different languages.
It is not portable
It may need some other close-source libraries
What might be some other reasons?
Yes, some open-source licenses may require you to expose your source code, e.g GPL.
http://encodable.com/tech/blog/2006/02/25/Why_the_GPL_is_Incompatible_with_Commercial_Software
When security is involved and you do not have access to the actual code so you never (truly) know what you are using.
Beta code may not be appropriate in a production system.
if the library has a web page and there hasn't been any activity on it for a long long time. Either the code is perfect or no one is looking at the code anymore and no bug fixes are being applied.
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Closed 11 years ago.
Does anyone know of a really rock solid C++ library for suffix tries? Other than the one in Mummer?
Ideally, I'd like:
Some concept of concurrency.
Good caching behavior.
Permissive license.
Support for arbitrary alphabets.
Being a bioinformatician, my pick would be SeqAn (check out the sequence index section). It implements a lazy suffix tree and an enhanced suffix array (an equivalent data structure), both of which have good cache behaviour.
Having actually used and then forgotten PATL, I'd like to tuck in a link in an answer.
http://code.google.com/p/patl/
It's got a couple really distinct features, and is generally pleasant reading as well.
Most likely this is a tutorial but IMO worth reading and with source code: http://marknelson.us/1996/08/01/suffix-trees.
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Closed 11 years ago.
I was reading in a textbook on c++ about IOstreams, and I came across this:
Whenever you want to store information
on the computer for longer than the
running time of a program, the usual
approach is to collect the data into a
logically cohesive whole and store it
on a permanent storage medium as a
file.
(Quoted from Programming Abstractions in C++)
Is there an UNUSUAL approach to storing data?
Pushing across to a server, operating systems (experimental) that let you freeze parts of RAM etc.
This is a very vague question, and really, has no good answer.
i guess if you store it at some place in the RAM, and hope for it to be there when you run your program again, that would be an unusual way of storing :-)