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/* screenio.h - display functions
$Id: screenio.h,v 0.2 1997/03/28 03:17:29 tjchol01 Exp $
Authors: Andrew Trevorrow, Ian Dall, Geoffrey Tobin, Tomasz J. Cholewo
*/
#ifndef __SCREENIO_H__
#define __SCREENIO_H__
#include "dvgt.h"
/* 0 = success, 1 = error */
/* These terminal i/o routines are highly system-dependent and have been
designed for DVItoVDU and its auxiliary modules.
Notes:
- InitScreenIO saves the current tty characteristics,
then sets the mode to cbreak with no echo.
Clients should therefore call RestoreTerminal before terminating.
- WriteFlush or WriteLine must be called to explicitly update the terminal
(e.g., just before a read) or to synchronize output with writes
from other modules that don't use ScreenIO.
- WriteString assumes the end of a string is the first blank (if not full),
so clients need to replace calls like WriteString('xxx = ') with
WriteString('xxx ='); WriteChar(' ').
*/
#define CR '\n' /* SYSDEP: char read upon hitting Return key */
#define CTRLC '\0' /* SYSDEP: interrupt, see unixio */
#define CTRLZ '\001' /* SYSDEP: suspend, see unixio */
/* SYSDEP: unixio puts CTRLC and CTRLZ into input buffer (along with CR)
upon getting a ^C or ^Z interrupt.
(It can't put chr(3) and chr(26) into buffer
because tty will detect another interrupt and we'll loop forever!)
*/
#define NUL '\0'
#define FF '\f'
#define CAN '\030'
#define ESC '\033'
#define FS '\034'
#define GS '\035'
#define US '\037'
#define XXX 256
extern int textlinewidth; /* text characters (columns) per line */
extern int textcolumn; /* column in current text line */
extern char TeXtoASCII[XXX]; /* TeX char to ASCII char */
extern void InitScreenIO ();
extern void ReadChar PARAMS ((char *ch));
extern void ReadString PARAMS ((char *s));
extern boolean BusyRead PARAMS ((char *ch));
extern void WriteInt PARAMS ((int i));
extern void WriteLine ();
#define WriteChar(X) putchar(X)
#define WriteString(X) fputs(X, stdout)
#define WriteFlush() fflush(stdout)
extern int MesgInt PARAMS ((int i));
extern void MesgLine ();
extern int MesgChar PARAMS ((int ch));
extern int MesgString PARAMS ((const char *s));
extern int MesgFlush ();
extern void RestoreTerminal ();
#endif /* __SCREENIO_H__ */
/* end screenio.h */
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