Thread: Using a char-array in stead of an external data file

  1. #1
    Registered User
    Join Date
    Sep 2002

    Using a char-array in stead of an external data file

    I have a char-array with the binary data of a file, and a function that takes a FILE pointer.
    Can I in some way give the function the data in my char-array in stead of writing it to an external file and then open this file using fopen or similar?

    Thanks in advance.

  2. #2
    Code Goddess Prelude's Avatar
    Join Date
    Sep 2001
    No, not really. If you can change the function then you would be able to pass an istream to the function. Then instead of a char array you could put the data in a stringstream and pass that. If you can't change the function then you're pretty much stuck with using a temporary file:
    void callee(FILE *in);
      char   *buffer,
      size_t  size
      FILE *temp = tmpfile();
      if (!temp) {
        // Error
      fwrite(buffer, 1, size, temp);
    My best code is written with the delete key.

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