usr/src/usr.bin/window/tt.h

/*
 *      @(#)tt.h        3.10 84/03/03
 */

/*
 * 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 */
        short *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.
 * Too may t's.
 */
char tt_strings[1024];          /* string buffer */
char *tt_strp;                  /* pointer for it */

#define tttgetstr(s)    tgetstr((s), &tt_strp)
char *ttxgetstr();              /* tgetstr() and expand delays */

int tttputc();
#define tttputs(s, n)   tputs((s), (n), tttputc)

/*
 * Buffered output without stdio.
 * These variables have different meanings from the ww_ob* variabels.
 * But I'm too lazy to think up different names.
 */
char tt_ob[512];
char *tt_obp;
char *tt_obe;
#define ttputc(c)       (tt_obp < tt_obe ? *tt_obp++ = (c) \
                                : (ttflush(), *tt_obp++ = (c)))