How to work with memory like direct access files: analogues of fread and fwrite functions?

Question

I need to work in my app with memory buffer like with direct access files. Is exists analogues for fread and fwrite functions? C++

I have buffer in memory with data. I want: read data, write data and move pointer in this buffer. Like files but with memory and without files.

Please explain a little more about what you are actually trying to acheive "big picture". — Mats Petersson, Jan 05 '13 at 21:54

Philipp Claßen · Accepted Answer · 2013-01-05T22:34:55.240

1

I think you mean memory mapped files. It is not supported by the C++ standard, but Boost has a portable implementation here.

Basically, it allows you to access the file through a pointer. The OS will take care of caching and, in general, it is quite efficient.

edited Jan 05 '13 at 22:34

answered Jan 05 '13 at 22:12

Philipp Claßen

1

I think the OP wants the opposite -- 'file-mapped memory'. – TonyK Jan 05 '13 at 22:53
@TonyK Maybe you are right. I'm just guessing. On the other hand, is the other direction reasonable? Accessing memory via an API for files? – Philipp Claßen Jan 05 '13 at 23:18

1 Answers1