support graphics if setup by somebody else.

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

/*
*      @(#)tt.h        3.8 83/09/15
*/

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

               /* terminal functions */
       int (*tt_move)();
       int (*tt_insline)();
       int (*tt_delline)();
       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)();

               /* 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 */
       char tt_ninsert;                /* insert mode on next write */
       int tt_row;                     /* cursor row */
       int tt_col;                     /* cursor column */

               /* terminal info */
       int tt_nrow;                    /* number of display rows */
       int tt_ncol;                    /* number of display columns */
       char tt_hasinsert;              /* has insert character */
       char tt_availmodes;             /* the display modes supported */
       char tt_wrap;                   /* has auto wrap around */
       char tt_retain;                 /* can retain below (db flag) */

               /* the frame characters */
       char *tt_frame;
};
struct tt tt;

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

/*
* Clean interface to termcap routines.
*/
char tt_strings[1024];          /* string buffer */
char *tt_strp;                  /* pointer for it */

int tt_pc();                    /* just putchar() */
int tt_sc();                    /* *tt_strp++ = c */
char *tt_xgetstr();             /* tgetstr() and expand delays */

#define tt_tgetstr(s)   tgetstr((s), &tt_strp)
#define tt_tputs(s, n)  tputs((s), (n), tt_pc)