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Re: [Help-glpk] Gusek : a GLPK IDE for Windows

From: Andrew Makhorin
Subject: Re: [Help-glpk] Gusek : a GLPK IDE for Windows
Date: Wed, 10 Dec 2008 04:08:59 +0300

>>> All others programs called by Gusek/SciTE (MinGW GCC, for example)
>>> generates outputs in real time, but the glpsol.exe does not.

> could it be that file flushing is missing.

> Would adding
> LIBENV *env = lib_link_env();
> if (!env->term_out) return;
> if (env->log_file != NULL) fflush(env->log_file);

> at the end of xprintf() in glplib04.c help?

The proper place to flush the terminal output is xputc in glplib04.c,
which is a base routine that produces actual output:

      /* write the character to the terminal */
      fputc(c, stdout);
+++   if (c == '\n') fflush(stdout);

though by default stdout must be open in _IONBF mode, i.e. the output
must not be buffered at all.

All this has sense only if SciTE replaces the standard output handle
(STD_OUTPUT_HANDLE) by a pipe handle on spawning glpsol.

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