mrf::CFIStreamBuf Class Reference

Adapt CFIFlash for use with std::istream. More...

#include <flash.h>

Inheritance diagram for mrf::CFIStreamBuf:

Collaboration diagram for mrf::CFIStreamBuf:

Public Member Functions
	CFIStreamBuf (CFIFlash &flash)
virtual int_type	underflow () OVERRIDE FINAL
virtual pos_type	seekoff (off_type off, std::ios_base::seekdir dir, std::ios_base::openmode mode) OVERRIDE FINAL
virtual pos_type	seekpos (pos_type pos, std::ios_base::openmode mode) OVERRIDE FINAL

Detailed Description

Adapt CFIFlash for use with std::istream.

Definition at line 89 of file flash.h.

Constructor & Destructor Documentation

CFIStreamBuf()

mrf::CFIStreamBuf::CFIStreamBuf

(

CFIFlash &

flash

)

Definition at line 371 of file flash.cpp.

    :flash(flash)
    ,pos(0u)
{}

Member Function Documentation

seekoff()

CFIStreamBuf::pos_type mrf::CFIStreamBuf::seekoff ( off_type  off, std::ios_base::seekdir  dir, std::ios_base::openmode  mode  )

virtual

Definition at line 388 of file flash.cpp.

{
    if(dir==std::ios_base::cur)
        off += pos;
    else if(dir==std::ios_base::end)
        return pos_type(-1); // error
    return seekpos(off, mode);
}

seekpos()

CFIStreamBuf::pos_type mrf::CFIStreamBuf::seekpos ( pos_type  pos, std::ios_base::openmode  mode  )

virtual

Definition at line 398 of file flash.cpp.

{
    pos = off;
    setg(&buf[0], &buf[0], &buf[0]); // empty buffer
    return pos;
}

underflow()

CFIStreamBuf::int_type mrf::CFIStreamBuf::underflow ( )

virtual

Definition at line 376 of file flash.cpp.

{
    // read-ahead is only one page
    buf.resize(flash.pageSize());
    flash.read(pos, buf.size(), (epicsUInt8*)&buf[0]);
    setg(&buf[0], &buf[0], &buf[buf.size()]);
    pos += buf.size();

    return buf[0];
}

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The documentation for this class was generated from the following files:

• flash.h
• flash.cpp