xref: /titanic_41/usr/src/lib/libcurses/screen/init_costs.c (revision 7c478bd95313f5f23a4c958a745db2134aa03244)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1988 AT&T	*/
28 /*	  All Rights Reserved	*/
29 
30 /*
31  * University Copyright- Copyright (c) 1982, 1986, 1988
32  * The Regents of the University of California
33  * All Rights Reserved
34  *
35  * University Acknowledgment- Portions of this document are derived from
36  * software developed by the University of California, Berkeley, and its
37  * contributors.
38  */
39 
40 #pragma ident	"%Z%%M%	%I%	%E% SMI"
41 
42 /*LINTLIBRARY*/
43 
44 #include	<stdlib.h>
45 #include	<sys/types.h>
46 #include	"curses_inc.h"
47 
48 /*
49  * Figure out (roughly) how much each of these capabilities costs.
50  * In the parameterized cases, we just take a typical case and
51  * use that value.  This is done only once at startup, since it
52  * would be too expensive for intensive use.
53  */
54 
55 static  int 	_cost_fn(char *, int);
56 
57 static	short	offsets[] = {
58 		    52,		/* insert_character, */
59 		    21,		/* delete_character, */
60 		    12,		/* cursor_home, */
61 		    18,		/* cursor_to_ll, */
62 		    14,		/* cursor_left, */
63 		    17,		/* cursor_right, */
64 		    11,		/* cursor_down, */
65 		    19,		/* cursor_up, */
66 		    2,		/* carriage_return, */
67 		    134,	/* tab, */
68 		    0,		/* back_tab, */
69 		    6,		/* clr_eol, */
70 		    269,	/* clr_bol, */
71 #define	FIRST_LOOP	13
72 		    108,	/* parm_ich, */
73 		    105,	/* parm_dch, */
74 		    111,	/* parm_left_cursor, */
75 		    114,	/* parm_up_cursor, */
76 		    107,	/* parm_down_cursor, */
77 		    112,	/* parm_right_cursor, */
78 #define	SECOND_LOOP	19
79 		};
80 
81 void
_init_costs(void)82 _init_costs(void)
83 {
84 	short	*costptr = &(SP->term_costs.icfixed);
85 	char	**str_array = (char **) cur_strs;
86 	int	i = 0;
87 	char	save_xflag = xon_xoff;
88 
89 	xon_xoff = 0;
90 /*
91  * This next block of code is actually correct in that it takes into
92  * account many things that wrefresh has to keep figuring in the function
93  * _useidch.  Wrefresh MUST be changed (in the words of Tony Hansen) !!!
94  *
95  * Wrefresh has been changed (in my words -Phong Vo) !!!!
96  */
97 	*costptr++ = ((enter_insert_mode) && (exit_insert_mode)) ?
98 	    _cost_fn(enter_insert_mode, 0) + _cost_fn(exit_insert_mode, 0) : 0;
99 
100 	*costptr++ = ((enter_delete_mode) && (exit_delete_mode)) ?
101 	    _cost_fn(enter_delete_mode, 0) + _cost_fn(exit_delete_mode, 0) : 0;
102 
103 	while (i < FIRST_LOOP)
104 		*costptr++ = _cost_fn(str_array[offsets[i++]], 1);
105 
106 	while (i < SECOND_LOOP)
107 		*costptr++ = _cost_fn(tparm_p1(str_array[offsets[i++]], 10), 1);
108 
109 	*costptr++ = _cost_fn(tparm_p2(cursor_address, 8, 10), 1);
110 	*costptr++ = _cost_fn(tparm_p1(row_address, 8), 1);
111 
112 	xon_xoff = save_xflag;
113 #ifdef	DEBUG
114 	if (outf) {
115 		fprintf(outf, "icfixed %d=%d+%d\n", _COST(icfixed),
116 		    _cost_fn(enter_insert_mode, 0),
117 		    _cost_fn(exit_insert_mode, 0));
118 		fprintf(outf, "from ich1 %x '%s' %d\n", insert_character,
119 		    insert_character, _cost_fn(insert_character, 1));
120 		fprintf(outf, "ip %x '%s' %d\n", insert_padding,
121 		    insert_padding, _cost_fn(insert_padding, 1));
122 		fprintf(outf, "dcfixed %d\n", _COST(dcfixed));
123 	}
124 #endif	/* DEBUG */
125 /*FALLTHROUGH*/
126 }
127 
128 static int counter = 0;
129 int
130 /* ARGSUSED */
_countchar(char dummy)131 _countchar(char dummy)
132 {
133 	counter++;
134 	return (0);
135 }
136 
137 /*
138  * Figure out the _COST in characters to print this string.
139  * Due to padding, we can't just use strlen, so instead we
140  * feed it through tputs and trap the results.
141  * Even if the terminal uses xon/xoff handshaking, count the
142  * pad chars here since they estimate the real time to do the
143  * operation, useful in calculating costs.
144  */
145 
146 static int
_cost_fn(char * str,int affcnt)147 _cost_fn(char *str, int affcnt)
148 {
149 	if (str == NULL)
150 		return (LARGECOST);
151 	counter = 0;
152 	(void) tputs(str, affcnt, _countchar);
153 	return (counter);
154 }
155