Re: libapl stdout

[Chris Moller]

    Qt isn't necessary--that's just the environment I'm
      working in.  From my example, get rid of the #include
    <QtWidgets> line.
      
      Here's aplexec.h:
> #ifndef APLEXEC_H
>         
>         #define APLEXEC_H
>         
>         
>         #include <QtWidgets>
>         
>         #include <apl/libapl.h>
>         
>         
>         #define APL_VARIABLE "([⍙∆a-z][⍙∆_a-z0-9]*)"
>         
>         
>         typedef enum {
>         
>          APL_OP_EXEC,
>         
>          APL_OP_COMMAND
>         
>         } apl_op_e;
>         
>         
>         class AplExec
>         
>         {
>         
>         public:
>         
>          static LIBAPL_error
>         
>          aplExec (apl_op_e apl_op, QString &cmd,
>         
>                   QString &outString, QString &errString);
>         
>         };
>         
>         #endif // APLEEXEC_H
>     
    
        
        Again, you don't need the Qt stuff.  Mostly, what you need is
        the 
> #include
>           <apl/libapl.h>
>       
    line.  And you
        probably don't need the #define
          APL_VARIABLE "([⍙∆a-z][⍙∆_a-z0-9]*)" line
          
        For this to work at all, you need to build Jürgen's APL twice,
        once as usual to install apl itself, and a second time with 
      
> ./configure --with-libapl
>       make install
>       
    (with any other options you need
          on the configure)
          
          What this does is put apl-related stuff in /usr/local/include
          and /usr/local/lib.  (I think I manually copied Error.def from
          the apl source tree into /usr/local/include--I don't think it
          gets copied with the make install.)

On 1/27/23 16:28, enztec@gmx.com wrote:

> Chris 
>
> i don't have qt installed nor do i have your
> #include "aplexec.h"
>
> On Fri, 27 Jan 2023 11:23:08 -0500
> Chris Moller <moller@mollerware.com> wrote:
>
> > For what it's worth, in an ongoing project in use:
> >
> >     #include <QtWidgets>
> >
> >     #include <iostream>
> >     #include <sstream>
> >
> >     #include <apl/libapl.h>
> >
> >     #include "aplexec.h"
> >
> >     LIBAPL_error
> >     AplExec::aplExec (apl_op_e apl_op, QString &cmd,
> >                QString &outString, QString &errString)
> >     {
> >       LIBAPL_error execerr = LAE_NO_ERROR;
> >
> >       switch(apl_op) {
> >       case APL_OP_EXEC:
> >         {
> >           std::stringstream outbuffer;
> >           std::streambuf *coutbuf = std::cout.rdbuf();
> >           std::cout.rdbuf(outbuffer.rdbuf());
> >           std::stringstream errbuffer;
> >           std::streambuf *cerrbuf = std::cerr.rdbuf();
> >           std::cerr.rdbuf(errbuffer.rdbuf());
> >           execerr = apl_exec (cmd.toStdString ().c_str ());
> >           std::cout.rdbuf(coutbuf);
> >           std::cerr.rdbuf(cerrbuf);
> >           outString = QString (outbuffer.str ().c_str ());
> >           errString = QString (errbuffer.str ().c_str ());
> >         }
> >         break;
> >       case APL_OP_COMMAND:
> >         {
> >           std::stringstream errbuffer;
> >           std::streambuf *cerrbuf = std::cerr.rdbuf();
> >           std::cerr.rdbuf(errbuffer.rdbuf());
> >           const char *res = apl_command (cmd.toStdString ().c_str ());
> >           if (res) {
> >             outString = QString (res);
> >             free ((void *)res);
> >           }
> >           std::cerr.rdbuf(cerrbuf);
> >           errString = QString (errbuffer.str ().c_str ());
> >         }
> >         break;
> >       }
> >
> >       return execerr;
> >     }
> >
> > I.e., I'm capturing stdout and stderr in strings.
> >       
>
>

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