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patrickdepinguin
patrickdepinguin
Last Activity: Jun 5 '07, 08:40 AM
Joined: May 23 '07
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  • patrickdepinguin
    started a topic Problems using zlib - buffer problem or something else?
    in C

    Problems using zlib - buffer problem or something else?

    Hi,

    I use zlib to write data structures to a compressed file, using the
    gzwrite function. Afterwards I read the data back with gzread. I notice
    that this works well when the data written is not that much, but when
    there is more data to write, after a while I get data errors when
    reading back the data.
    Error in main: couldn't read stat
    zlib error -3: test512-20070531-18h10m02.stat.g z: data...
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    • patrickdepinguin
      replied to Function Pointer.
      in C
      Hi,

      Here is a site that explains function pointers for both in C and C++, which I found very helpful:
      http://www.newty.de/fpt/index.html

      Thomas...
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      • patrickdepinguin
        replied to [c] Efficiently writing large quantities of data to a file
        in C
        I'm on Linux, I thought that writing as binary or text was the same (i.e. the 'b' option is ignored). From the manpage:




        What do you mean with the last sentence? I thought snprintf will check for the buffer overrun, right?



        When I don't use memset, I have to make sure that I pass the correct length arguments to fwrite, right? Is it ok to give the size argument to fwrite a value of...
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        • patrickdepinguin
          replied to i want to create a program that translates a sentance in english to another language
          in C
          This one doesn't use trees, but nevertheless seems of use:
          http://www.boost.org/libs/iostreams/doc/tutorial/dictionary_filt ers.html
          It is from a library called boost, the source code should be downloadable.

          I didn't find a complete tree solution immediately, but you can find examples on searching in trees separately. You can then uses these in your own script....
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          • patrickdepinguin
            replied to i want to create a program that translates a sentance in english to another language
            in C
            Just my 2 cents, but using a simple text file to handle this problem is very inefficient. Furthermore, such a dictionary problem has undoubtedly been solved before and if you want a good result (and don't necessarily want to do it yourself) you can look on the internet for an appropriate solution which is free to use.

            A more efficient way to store the dictionary would be to use some kind of tree structure (simple tree, btree, balanced...
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            • patrickdepinguin
              started a topic [c] Efficiently writing large quantities of data to a file
              in C

              [c] Efficiently writing large quantities of data to a file

              Hi,

              I need to write large quantities of data to a file in C. The data comes from statistics that are continuously gathered from a simulator, and in order to not slow the whole thing down I would obviously want the writes to go as fast and efficient as possible.

              Since I/O operations are rather slow, I was thinking that using a large buffer would be better than writing each data point every time. Each data point calls...
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