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82 lines
3.0 KiB
C
82 lines
3.0 KiB
C
#ifndef __TERMINAL_H__
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#define __TERMINAL_H__
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#include "defines.h" /* COLOR, SCROLLCODE */
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#include "retcode.h"
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/*
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* The editor communicates with the display using a high level interface. A
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* "TERM" structure holds useful variables, and indirect pointers to routines
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* that do useful operations. The low level get and put routines are here too.
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* This lets a terminal, in addition to having non standard commands, have
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* funny get and put character code too. The calls might get changed to
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* "termp->t_field" style in the future, to make it possible to run more than
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* one terminal type.
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*/
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struct terminal {
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short t_mrow; /* max number of rows allowable */
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short t_nrow; /* current number of rows used */
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short t_mcol; /* max Number of columns. */
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short t_ncol; /* current Number of columns. */
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short t_margin; /* min margin for extended lines */
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short t_scrsiz; /* size of scroll region " */
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int t_pause; /* # times thru update to pause */
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void (*t_open)(void); /* Open terminal at the start. */
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void (*t_close)(void); /* Close terminal at end. */
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void (*t_kopen)(void); /* Open keyboard */
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void (*t_kclose)(void); /* close keyboard */
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int (*t_getchar)(void); /* Get character from keyboard. */
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int (*t_putchar)(int); /* Put character to display. */
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void (*t_flush) (void); /* Flush output buffers. */
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void (*t_move)(int, int);/* Move the cursor, origin 0. */
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void (*t_eeol)(void); /* Erase to end of line. */
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void (*t_eeop)(void); /* Erase to end of page. */
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void (*t_beep)(void); /* Beep. */
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void (*t_rev)(int); /* set reverse video state */
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int (*t_rez)(char *); /* change screen resolution */
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#if COLOR
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int (*t_setfor) (); /* set forground color */
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int (*t_setback) (); /* set background color */
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#endif
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#if SCROLLCODE
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void (*t_scroll)(int, int,int); /* scroll a region of the screen */
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#endif
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};
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/* TEMPORARY macros for terminal I/O (to be placed in a machine
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dependant place later) */
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#define TTopen (*term.t_open)
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#define TTclose (*term.t_close)
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#define TTkopen (*term.t_kopen)
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#define TTkclose (*term.t_kclose)
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#define TTgetc (*term.t_getchar)
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#define TTputc (*term.t_putchar)
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#define TTflush (*term.t_flush)
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#define TTmove (*term.t_move)
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#define TTeeol (*term.t_eeol)
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#define TTeeop (*term.t_eeop)
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#define TTbeep (*term.t_beep)
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#define TTrev (*term.t_rev)
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#define TTrez (*term.t_rez)
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#if COLOR
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#define TTforg (*term.t_setfor)
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#define TTbacg (*term.t_setback)
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#endif
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/* Terminal table defined only in term.c */
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extern struct terminal term ;
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extern int ttrow ; /* Row location of HW cursor */
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extern int ttcol ; /* Column location of HW cursor */
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extern boolean eolexist ; /* does clear to EOL exist? */
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extern boolean revexist ; /* does reverse video exist? */
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extern boolean sgarbf ; /* State of screen unknown */
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extern char sres[] ; /* Current screen resolution. */
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/* NORMAL, CGA, EGA, VGA */
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#endif
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