class Poco::RandomBuf

Overview

This streambuf generates random data. More…

#include <RandomStream.h>

class RandomBuf: public Poco::BasicBufferedStreamBuf
{
public:
    // methods

    int
    readFromDevice(
        char* buffer,
        std::streamsize length
        );
};

Inherited Members

public:
    // methods

    virtual
    int_type
    overflow(int_type c);

    virtual
    int_type
    underflow();

    virtual
    int
    sync();

protected:
    // typedefs

    typedef std::basic_streambuf<ch, tr> Base;
    typedef std::basic_ios<ch, tr> IOS;
    typedef ch char_type;
    typedef tr char_traits;
    typedef ba Allocator;
    typedef Base::int_type int_type;
    typedef Base::pos_type pos_type;
    typedef Base::off_type off_type;
    typedef IOS::openmode openmode;

    // methods

    void
    setMode(openmode mode);

    openmode
    getMode() const;

Detailed Documentation

This streambuf generates random data.

On Windows NT, the cryptographic API is used. On Unix, /dev/random is used, if available. Otherwise, a random number generator, some more-or-less random data and a SHA-1 digest is used to generate random data.