dribble.c revision 56160
1/* dribble.c -- dribble files for Info. 2 3 Copyright (C) 1993, 98 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 2, or (at your option) 8 any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program; if not, write to the Free Software 17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 18 19 Written by Brian Fox (bfox@ai.mit.edu). */ 20 21#include "info.h" 22#include "dribble.h" 23 24/* When non-zero, it is a stream to write all input characters to for the 25 duration of this info session. */ 26FILE *info_dribble_file = (FILE *)NULL; 27 28/* Open a dribble file named NAME, perhaps closing an already open one. 29 This sets the global variable INFO_DRIBBLE_FILE to the open stream. */ 30void 31open_dribble_file (name) 32 char *name; 33{ 34 /* Perhaps close existing dribble file. */ 35 close_dribble_file (); 36 37 /* Keystrokes can be non-printable characters, so we need binary I/O. */ 38 info_dribble_file = fopen (name, FOPEN_WBIN); 39 40#if defined (HAVE_SETVBUF) 41 if (info_dribble_file) 42# if defined (SETVBUF_REVERSED) 43 setvbuf (info_dribble_file, _IONBF, (char *)NULL, 1); 44# else 45 setvbuf (info_dribble_file, (char *)NULL, _IONBF, 1); 46# endif /* !SETVBUF_REVERSED */ 47#endif /* HAVE_SETVBUF */ 48} 49 50/* If there is a dribble file already open, close it. */ 51void 52close_dribble_file () 53{ 54 if (info_dribble_file) 55 { 56 fflush (info_dribble_file); 57 fclose (info_dribble_file); 58 info_dribble_file = (FILE *)NULL; 59 } 60} 61 62/* Write some output to our existing dribble file. */ 63void 64dribble (byte) 65 unsigned char byte; 66{ 67 if (info_dribble_file) 68 fwrite (&byte, sizeof (unsigned char), 1, info_dribble_file); 69} 70