break out special local mail processing (e.g., mapping to the

[unix-history] / usr / src / usr.bin / window / tt.h

/*
* Copyright (c) 1983, 1993
*      The Regents of the University of California.  All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Edward Wang at The University of California, Berkeley.
*
* %sccs.include.redist.c%
*
*      @(#)tt.h        8.1 (Berkeley) %G%
*/

/*
* Interface structure for the terminal drivers.
*/
struct tt {
               /* startup and cleanup */
       int (*tt_start)();
       int (*tt_reset)();
       int (*tt_end)();

               /* terminal functions */
       int (*tt_move)();
       int (*tt_insline)();
       int (*tt_delline)();
       int (*tt_inschar)();
       int (*tt_insspace)();
       int (*tt_delchar)();
       int (*tt_write)();              /* write a whole block */
       int (*tt_putc)();               /* write one character */
       int (*tt_clreol)();
       int (*tt_clreos)();
       int (*tt_clear)();
       int (*tt_scroll_down)();
       int (*tt_scroll_up)();
       int (*tt_setscroll)();          /* set scrolling region */
       int (*tt_setmodes)();           /* set display modes */
       int (*tt_set_token)();          /* define a token */
       int (*tt_put_token)();          /* refer to a defined token */
       int (*tt_compress)();           /* begin, end compression */
       int (*tt_checksum)();           /* compute checksum */
       int (*tt_checkpoint)();         /* checkpoint protocol */
       int (*tt_rint)();               /* input processing */

               /* internal variables */
       char tt_modes;                  /* the current display modes */
       char tt_nmodes;                 /* the new modes for next write */
       char tt_insert;                 /* currently in insert mode */
       int tt_row;                     /* cursor row */
       int tt_col;                     /* cursor column */
       int tt_scroll_top;              /* top of scrolling region */
       int tt_scroll_bot;              /* bottom of scrolling region */

               /* terminal info */
       int tt_nrow;                    /* number of display rows */
       int tt_ncol;                    /* number of display columns */
       char tt_availmodes;             /* the display modes supported */
       char tt_wrap;                   /* has auto wrap around */
       char tt_retain;                 /* can retain below (db flag) */
       short tt_padc;                  /* the pad character */
       int tt_ntoken;                  /* number of compression tokens */
       int tt_token_min;               /* minimun token size */
       int tt_token_max;               /* maximum token size */
       int tt_set_token_cost;          /* cost in addition to string */
       int tt_put_token_cost;          /* constant cost */
       int tt_ack;                     /* checkpoint ack-nack flag */

               /* the frame characters */
       short *tt_frame;

               /* ttflush() hook */
       int (*tt_flush)();
};
struct tt tt;

/*
* tt_padc is used by the compression routine.
* It is a short to allow the driver to indicate that there is no padding.
*/
#define TT_PADC_NONE 0x100

/*
* List of terminal drivers.
*/
struct tt_tab {
       char *tt_name;
       int tt_len;
       int (*tt_func)();
};
extern struct tt_tab tt_tab[];

/*
* Clean interface to termcap routines.
* Too may t's.
*/
char tt_strings[1024];          /* string buffer */
char *tt_strp;                  /* pointer for it */

struct tt_str {
       char *ts_str;
       int ts_n;
};

struct tt_str *tttgetstr();
struct tt_str *ttxgetstr();     /* tgetstr() and expand delays */

int tttputc();
#define tttputs(s, n)   tputs((s)->ts_str, (n), tttputc)
#define ttxputs(s)      ttwrite((s)->ts_str, (s)->ts_n)

/*
* Buffered output without stdio.
* These variables have different meanings from the ww_ob* variables.
* But I'm too lazy to think up different names.
*/
char *tt_ob;
char *tt_obp;
char *tt_obe;
#define ttputc(c)       (tt_obp < tt_obe ? (*tt_obp++ = (c)) \
                               : (ttflush(), *tt_obp++ = (c)))

/*
* Convenience macros for the drivers
* They require char.h
*/
#define ttctrl(c)       ttputc(ctrl(c))
#define ttesc(c)        (ttctrl('['), ttputc(c))