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/* dribble.c -- dribble files for Info.
Copyright 1993-2024 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Originally written by Brian Fox. */
#include "info.h"
#include "dribble.h"
/* When non-zero, it is a stream to write all input characters to for the
duration of this info session. */
FILE *info_dribble_file = NULL;
/* Open a dribble file named NAME, perhaps closing an already open one.
This sets the global variable INFO_DRIBBLE_FILE to the open stream. */
void
open_dribble_file (char *name)
{
/* Perhaps close existing dribble file. */
close_dribble_file ();
/* Keystrokes can be non-printable characters, so we need binary I/O. */
info_dribble_file = fopen (name, FOPEN_WBIN);
if (info_dribble_file)
setvbuf (info_dribble_file, NULL, _IONBF, 1);
}
/* If there is a dribble file already open, close it. */
void
close_dribble_file (void)
{
if (info_dribble_file)
{
fflush (info_dribble_file);
fclose (info_dribble_file);
info_dribble_file = NULL;
}
}
/* Write some output to our existing dribble file. */
void
dribble (unsigned char byte)
{
if (info_dribble_file)
fwrite (&byte, sizeof (unsigned char), 1, info_dribble_file);
}
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