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1.1 root 1: /*
2: * Copyright (c) 1983 Regents of the University of California.
3: * All rights reserved.
4: *
5: * This code is derived from software contributed to Berkeley by
6: * Edward Wang at The University of California, Berkeley.
7: *
8: * Redistribution and use in source and binary forms are permitted provided
9: * that: (1) source distributions retain this entire copyright notice and
10: * comment, and (2) distributions including binaries display the following
11: * acknowledgement: ``This product includes software developed by the
12: * University of California, Berkeley and its contributors'' in the
13: * documentation or other materials provided with the distribution and in
14: * all advertising materials mentioning features or use of this software.
15: * Neither the name of the University nor the names of its contributors may
16: * be used to endorse or promote products derived from this software without
17: * specific prior written permission.
18: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
19: * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
20: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
21: *
22: * @(#)tt.h 3.27 (Berkeley) 6/6/90
23: */
24:
25: /*
26: * Interface structure for the terminal drivers.
27: */
28: struct tt {
29: /* startup and cleanup */
30: int (*tt_start)();
31: int (*tt_end)();
32:
33: /* terminal functions */
34: int (*tt_move)();
35: int (*tt_insline)();
36: int (*tt_delline)();
37: int (*tt_inschar)();
38: int (*tt_insspace)();
39: int (*tt_delchar)();
40: int (*tt_write)(); /* write a whole block */
41: int (*tt_putc)(); /* write one character */
42: int (*tt_clreol)();
43: int (*tt_clreos)();
44: int (*tt_clear)();
45: int (*tt_scroll_down)();
46: int (*tt_scroll_up)();
47: int (*tt_setscroll)(); /* set scrolling region */
48: int (*tt_setmodes)(); /* set display modes */
49: int (*tt_set_token)(); /* define a token */
50: int (*tt_put_token)(); /* refer to a defined token */
51:
52: /* internal variables */
53: char tt_modes; /* the current display modes */
54: char tt_nmodes; /* the new modes for next write */
55: char tt_insert; /* currently in insert mode */
56: int tt_row; /* cursor row */
57: int tt_col; /* cursor column */
58: int tt_scroll_top; /* top of scrolling region */
59: int tt_scroll_bot; /* bottom of scrolling region */
60:
61: /* terminal info */
62: int tt_nrow; /* number of display rows */
63: int tt_ncol; /* number of display columns */
64: char tt_availmodes; /* the display modes supported */
65: char tt_wrap; /* has auto wrap around */
66: char tt_retain; /* can retain below (db flag) */
67: short tt_padc; /* the pad character */
68: int tt_ntoken; /* number of compression tokens */
69: int tt_token_min; /* minimun token size */
70: int tt_token_max; /* maximum token size */
71: int tt_set_token_cost; /* cost in addition to string */
72: int tt_put_token_cost; /* constant cost */
73:
74: /* the frame characters */
75: short *tt_frame;
76:
77: /* the output routine */
78: int (*tt_flush)();
79: };
80: struct tt tt;
81:
82: /*
83: * tt_padc is used by the compression routine.
84: * It is a short to allow the driver to indicate that there is no padding.
85: */
86: #define TT_PADC_NONE 0x100
87:
88: /*
89: * List of terminal drivers.
90: */
91: struct tt_tab {
92: char *tt_name;
93: int tt_len;
94: int (*tt_func)();
95: };
96: extern struct tt_tab tt_tab[];
97:
98: /*
99: * Clean interface to termcap routines.
100: * Too may t's.
101: */
102: char tt_strings[1024]; /* string buffer */
103: char *tt_strp; /* pointer for it */
104:
105: struct tt_str {
106: char *ts_str;
107: int ts_n;
108: };
109:
110: struct tt_str *tttgetstr();
111: struct tt_str *ttxgetstr(); /* tgetstr() and expand delays */
112:
113: int tttputc();
114: #define tttputs(s, n) tputs((s)->ts_str, (n), tttputc)
115: #define ttxputs(s) ttwrite((s)->ts_str, (s)->ts_n)
116:
117: /*
118: * Buffered output without stdio.
119: * These variables have different meanings from the ww_ob* variables.
120: * But I'm too lazy to think up different names.
121: */
122: char *tt_ob;
123: char *tt_obp;
124: char *tt_obe;
125: #define ttputc(c) (tt_obp < tt_obe ? (*tt_obp++ = (c)) \
126: : ((*tt.tt_flush)(), *tt_obp++ = (c)))
127:
128: /*
129: * Convenience macros for the drivers
130: * They require char.h
131: */
132: #define ttctrl(c) ttputc(ctrl(c))
133: #define ttesc(c) (ttctrl('['), ttputc(c))
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