1 /*
2 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
3 * Use is subject to license terms.
4 */
5
6 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
7 /* All Rights Reserved */
8
9 /*
10 * Copyright (c) 1980 Regents of the University of California.
11 * All rights reserved. The Berkeley software License Agreement
12 * specifies the terms and conditions for redistribution.
13 */
14
15 #pragma ident "%Z%%M% %I% %E% SMI"
16
17 #ifndef lint
18 static char
19 sccsid[] = "@(#)addch.c 1.6 88/02/08 SMI"; /* from UCB 5.1 85/06/07 */
20 #endif /* not lint */
21
22 #include "curses.ext"
23
24 /* forward declaration */
25 static void set_ch(WINDOW *, int, int, int);
26
27 /*
28 * This routine adds the character to the current position
29 */
30
31 int
waddch(WINDOW * win,char c)32 waddch(WINDOW *win, char c)
33 {
34 int x, y;
35 int newx;
36
37 x = win->_curx;
38 y = win->_cury;
39 #ifdef FULLDEBUG
40 fprintf(outf, "ADDCH('%c') at (%d, %d)\n", c, y, x);
41 #endif
42 switch (c) {
43 case '\t':
44 for (newx = x + (8 - (x & 07)); x < newx; x++)
45 if (waddch(win, ' ') == ERR)
46 return (ERR);
47 return (OK);
48
49 default:
50 #ifdef FULLDEBUG
51 fprintf(outf, "ADDCH: 1: y = %d, x = %d, firstch = %d,"
52 " lastch = %d\n", y, x, win->_firstch[y],
53 win->_lastch[y]);
54 #endif
55 if (win->_flags & _STANDOUT)
56 c |= _STANDOUT;
57 set_ch(win, y, x, c);
58 win->_y[y][x++] = c;
59 if (x >= win->_maxx) {
60 x = 0;
61 newline:
62 if (++y >= win->_maxy)
63 if (win->_scroll) {
64 (void) scroll(win);
65 --y;
66 }
67 else
68 return (ERR);
69 }
70 #ifdef FULLDEBUG
71 fprintf(outf, "ADDCH: 2: y = %d, x = %d, firstch = %d,"
72 " lastch = %d\n", y, x, win->_firstch[y],
73 win->_lastch[y]);
74 #endif
75 break;
76 case '\n':
77 (void) wclrtoeol(win);
78 if (!NONL)
79 x = 0;
80 goto newline;
81 case '\r':
82 x = 0;
83 break;
84 case '\b':
85 if (--x < 0)
86 x = 0;
87 break;
88 }
89 win->_curx = (short)x;
90 win->_cury = (short)y;
91 return (OK);
92 }
93
94 /*
95 * set_ch:
96 * Set the first and last change flags for this window.
97 */
98
99 static void
set_ch(WINDOW * win,int y,int x,int ch)100 set_ch(WINDOW *win, int y, int x, int ch)
101 {
102 #ifdef FULLDEBUG
103 fprintf(outf, "SET_CH(%0.2o, %d, %d)\n", win, y, x);
104 #endif
105 if (win->_y[y][x] != ch) {
106 x += win->_ch_off;
107 if (win->_firstch[y] == _NOCHANGE)
108 win->_firstch[y] = win->_lastch[y] = (short)x;
109 else if (x < win->_firstch[y])
110 win->_firstch[y] = (short)x;
111 else if (x > win->_lastch[y])
112 win->_lastch[y] = (short)x;
113 #ifdef FULLDEBUG
114 fprintf(outf, "SET_CH: change gives f/l: %d/%d [%d/%d]\n",
115 win->_firstch[y], win->_lastch[y],
116 win->_firstch[y] - win->_ch_off,
117 win->_lastch[y] - win->_ch_off);
118 #endif
119 }
120 }
121