streams again

[Michael Shestero]

Hello.

I have three question about ofstream and ifstream.

1. I have a function that writes some text-output into ofstream. The
reference to that ofstream it got as a parameter. I have no access to source
code of it. I need redirect the output to somehing, for example to a CEdit
control.

2. I have a function that writes some text into cerr (stderr). No
parameters. No access to source code. I need redirect the output to
somehing, for example to a CEdit control.

3. I have a function that reads text from cin (stdin). No parameters. No
access to source code. I need to send into this function text from my char[]
or from CEdit control.

I know a bit about redirection of stdin and stdout for a child process using
pipes and streambuf overlapping. But there is only one process in my
application.
I can create a thread, but I don't want it.

Best regards,
Shestero Michael

[Chris Theis]

Re: streams again


"Michael Shestero" <shestero@cyber .miem.edu.ru> wrote in message
news:bpip27$1oo as2$1@ID-54498.news.uni-berlin.de...[color=blue]
> Hello.
>
> I have three question about ofstream and ifstream.
>
> 1. I have a function that writes some text-output into ofstream. The
> reference to that ofstream it got as a parameter. I have no access to[/color]
source[color=blue]
> code of it. I need redirect the output to somehing, for example to a CEdit
> control.
>
> 2. I have a function that writes some text into cerr (stderr). No
> parameters. No access to source code. I need redirect the output to
> somehing, for example to a CEdit control.
>
> 3. I have a function that reads text from cin (stdin). No parameters. No
> access to source code. I need to send into this function text from my[/color]
char[][color=blue]
> or from CEdit control.
>
> I know a bit about redirection of stdin and stdout for a child process[/color]
using[color=blue]
> pipes and streambuf overlapping. But there is only one process in my
> application.
> I can create a thread, but I don't want it.
>
> Best regards,
> Shestero Michael
>[/color]

You will have to ask this specific questions in a Microsoft VC newsgroup
because this newsgroup deals with standard C++ issues only.

[off-topic]
If I remember correctly there is a way of at least redirecting output from
cout to a window, as MS uses it for its Visual Studio. Try
ww.codeguru.com - I think I once saw a discussion about that there.

Chris

[Michael Shestero]

Re: streams again - standart C++

Dear Chris,

Well, forget about CEdit and Microsoft! Read char[] instead CEdit. My
question is about the streams redirection in standart C++, not about the
features of CEdit.
ofstream and ifstream is in Borland C++, GNU C++, MS VC++. The three
functions I have mentioned in my questions can be compiled in all above and
also in IAR eMbedded C++.
I guess this is quite standart C++ issue, isn't it?
To tell the compleate story the metter is that I try to leave this three
functions on standart C++ for source-level compatability, that's why I don't
want to change their code during integration into my MFC application.

Bye.
[color=blue][color=green]
> >
> > I have three question about ofstream and ifstream.
> >
> > 1. I have a function that writes some text-output into ofstream. The
> > reference to that ofstream it got as a parameter. I have no access to[/color]
> source[color=green]
> > code of it. I need redirect the output to somehing, for example to a[/color][/color]
CEdit[color=blue][color=green]
> > control.
> >
> > 2. I have a function that writes some text into cerr (stderr). No
> > parameters. No access to source code. I need redirect the output to
> > somehing, for example to a CEdit control.
> >
> > 3. I have a function that reads text from cin (stdin). No parameters. No
> > access to source code. I need to send into this function text from my[/color]
> char[][color=green]
> > or from CEdit control.
> >
> > I know a bit about redirection of stdin and stdout for a child process[/color]
> using[color=green]
> > pipes and streambuf overlapping. But there is only one process in my
> > application.
> > I can create a thread, but I don't want it.
> >
> > Best regards,
> > Shestero Michael
> >[/color]
>
> You will have to ask this specific questions in a Microsoft VC newsgroup
> because this newsgroup deals with standard C++ issues only.
>
> [off-topic]
> If I remember correctly there is a way of at least redirecting output from
> cout to a window, as MS uses it for its Visual Studio. Try
> ww.codeguru.com - I think I once saw a discussion about that there.
>
> Chris[/color]

[Mike Wahler]

Re: streams again - standart C++


"Michael Shestero" <shestero@cyber .miem.edu.ru> wrote in message
news:bpjdqu$1mp enq$1@ID-54498.news.uni-berlin.de...[color=blue]
> Dear Chris,
>
> Well, forget about CEdit and Microsoft! Read char[] instead CEdit. My
> question is about the streams redirection in standart C++, not about the
> features of CEdit.
> ofstream and ifstream is in Borland C++, GNU C++, MS VC++. The three
> functions I have mentioned in my questions can be compiled in all above[/color]
and[color=blue]
> also in IAR eMbedded C++.
> I guess this is quite standart C++ issue, isn't it?[/color]

You can, with standard C++, 'redirect' i/o to/from std::string
objects, using stringstreams. Character arrays can be inserted/
extracted to/from std::string objects.

Read about stringstreams.

-Mike