String buffer to streambuffer

This is a discussion on String buffer to streambuffer within the C++ Programming forums, part of the General Programming Boards category; Dear experts, please tell me is anyway of converting a string buffer into stream buffer. i desperately need this for ...

  1. #1
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    String buffer to streambuffer

    Dear experts,

    please tell me is anyway of converting a string buffer into stream buffer.

    i desperately need this for my project.
    i want to convert from
    Code:
    char *buffer;(some contents)
    
    strembuf *buf=buffer;
    is this is possible is there any way please help me.

  2. #2
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    What is strembuf?

  3. #3
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    Quote Originally Posted by Daved
    What is strembuf?
    There are three possibilities:
    1. A class
    2. A structure
    3. A type

    @vin_pll: We can't know if char* is convertable to streambuf if we don't know what it is (one of the three above). If it's a type then casting (streambuf*) is needed (at least in C++).

    Code:
    char *buffer;(some contents)
    
    strembuf *buf=(strembuf*)buffer;
    Last edited by hauzer; 11-10-2008 at 04:29 AM.
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  4. #4
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    Quote Originally Posted by vin_pll View Post
    Dear experts,

    please tell me is anyway of converting a string buffer into stream buffer.

    i desperately need this for my project.
    i want to convert from
    Code:
    char *buffer;(some contents)
    
    strembuf *buf=buffer;
    is this is possible is there any way please help me.
    actually, in this case, the streambuf (i'm only guessing here, but I suspect you're talking about an std::streambuf) does not need to be a pointer. you can do the following:
    Code:
    #include <iostream>
    
    char buffer[] = "this is a string";
    std::streambuf *buf = new std::stringbuf(buffer);
    std::streambuf is a pure virtual class and cannot be instantiated by itself. you have to use std::filebuf or std::stringbuf, or perhaps a custom class derived from it.

  5. #5
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    thank you experts,
    for giving your suggestion,

    but none of them is working
    Code:
    strembuf *buf=(strembuf*)buffer;
    
    i tried to cast this but no result is there any way to print the output(buf) here,
    
    and also
    
    std::streambuf *buf = new std::stringbuf(buffer);
    
    this is giving me a error like no constructor is defined
    is there any other possiblities so that i cast and display the contents if it is successfull.

  6. #6
    and the Hat of Guessing tabstop's Avatar
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    Did you #include <streambuf> and <sstream>?

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