help with streams please

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2 total messages Started by James Vincent Schultz Thu, 08 Oct 1992 05:12

#1345

Author: James Vincent Schultz
Date: Thu, 08 Oct 1992 05:12

24 lines
1197 bytes

I'm just starting out as a NeXT programmer, so please forgive me if I'm
missing something obvious.

I'd like to use the NXReadTypes & NXWriteTypes functions to temporarily store
some instance variables in memory.  I looked in NeXT Concepts and the
NeXTStep Reference to come up with the idea of opening a memory stream,
converting that to a typed stream, and passing that to my object.

This is great except that you have to open a stream NX_READONLY or
NX_WRITEONLY.  I can't figure out how to do both.  I want to write to a
stream, then come back a while later and read the values back.

How can I read & write a stream?

Thanks in advance,
James



--
James Schultz
Carnegie Mellon University
js3b+@andrew.cmu.edu

Re: help with streams please

#1422

Author: andrew
Date: Fri, 09 Oct 1992 23:00

29 lines
1569 bytes

In article <4ep3D7i00iUxE1J0Yj@andrew.cmu.edu> js3b+@andrew.cmu.edu (James Vincent Schultz) writes:
>
>I'm just starting out as a NeXT programmer, so please forgive me if I'm
>missing something obvious.
>
>I'd like to use the NXReadTypes & NXWriteTypes functions to temporarily store
>some instance variables in memory.  I looked in NeXT Concepts and the
>NeXTStep Reference to come up with the idea of opening a memory stream,
>converting that to a typed stream, and passing that to my object.
>
>This is great except that you have to open a stream NX_READONLY or
>NX_WRITEONLY.  I can't figure out how to do both.  I want to write to a
>stream, then come back a while later and read the values back.
>
>How can I read & write a stream?

NX_READWRITE

everbody should index /usr/include and put it on their default
bookshelf.  It's already done for you in 3.0 (and there's also
header-viewer in 3.0...)


andrew
-- 
andrew@cubetech.com     | "We shall not cease from exploration
Andrew Loewenstern      |  And the end of our exploring
Cube Technologies, Inc. |  Will be to arrive where we started
                        |  And know the place for the first time." -T.S. Eliot

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