Richard and Renauld,
Thank you very much for your help.
Renauld Molla wrote:
but did you check Apple's "Stream Programming Guide for Cocoa" at
Yes, I read about it before. I did not understand how to (directly)
use it for my purpouses.
On 2007-01-22 00:46:07 -0800 Richard Frith-Macdonald
<[EMAIL PROTECTED]> wrote:
NSStream is probably what you want to use, but it provides per-byte
I/ O. not
per-character I/O.
There is no API for per-character I/O, but you could subclass
NSStream to
add that if you really want it.
Per-byte will be perfectly fine.
NSStream can be used for buffered I/O by chaining together a memory
stream
and a stream that writes to a device directly.
Yes, it seemed NSStream was what I needed because I can get NSStreams
for
file, memory location or socket, and this is what I want.
At the risk of holding your attention for too long, let me share my
confusion about NSStream
with you. NSInputStream, for instance, has [-read:maxLen:] which in my
mind plays the role
of select() and read() combination for sockets. I can read the
available chunk of data.
This is great, but I need more that that. If I wrote in C, after
communication_fd = accept(...);
I would call
FILE * file = fdopen( communication_fd, "r" );
so that later I could use getc(file) and let the standard io library
call read() for me automatically when the next getc() tries to extract
a byte past the end of available data.
Shall I create a similar mechanism on the top of NSInputStream ?
Add [-readByte] to a subclass?
The closest thing to that "byte streams" I found so far was NSScanner,
but
1. It can be obtained from NSString, I did not find a way to obtain it
from
NSInputStream.
2. It can go back, scan for substrings etc., this is not possible for
general
input stream. I need just "going forward" functionality.
So it's too powerful and because of that too restrictive.
Is there something that provides a stream of bytes and
can get a new chunk behind the scenes?
Thank you,
Tima.
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