1 /* 2 * Copyright (c) 1987 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 /*static char sccsid[] = "from: @(#)addbytes.c 5.8 (Berkeley) 8/28/92";*/ 36 static char rcsid[] = "$Id: addbytes.c,v 1.6 1993/08/15 16:23:57 mycroft Exp $"; 37 #endif /* not lint */ 38 39 #include <curses.h> 40 #include <termios.h> 41 42 #define SYNCH_IN {y = win->_cury; x = win->_curx;} 43 #define SYNCH_OUT {win->_cury = y; win->_curx = x;} 44 45 /* 46 * waddbytes -- 47 * Add the character to the current position in the given window. 48 */ 49 int 50 waddbytes(win, bytes, count) 51 register WINDOW *win; 52 register const char *bytes; 53 register int count; 54 { 55 static char blanks[] = " "; 56 register int c, newx, x, y; 57 58 SYNCH_IN; 59 60 #ifdef DEBUG 61 __TRACE("ADDBYTES('%c') at (%d, %d)\n", c, y, x); 62 #endif 63 while (count--) { 64 c = *bytes++; 65 switch (c) { 66 case '\t': 67 SYNCH_OUT; 68 if (waddbytes(win, blanks, 8 - (x % 8)) == ERR) 69 return (ERR); 70 SYNCH_IN; 71 break; 72 73 default: 74 #ifdef DEBUG 75 __TRACE("ADDBYTES: 1: y = %d, x = %d, firstch = %d, lastch = %d\n", 76 y, x, win->_firstch[y], win->_lastch[y]); 77 #endif 78 if (win->_flags & _STANDOUT) 79 c |= _STANDOUT; 80 #ifdef DEBUG 81 __TRACE("ADDBYTES(%0.2o, %d, %d)\n", win, y, x); 82 #endif 83 if (win->_y[y][x] != c) { 84 newx = x + win->_ch_off; 85 if (win->_firstch[y] == _NOCHANGE) 86 win->_firstch[y] = 87 win->_lastch[y] = newx; 88 else if (newx < win->_firstch[y]) 89 win->_firstch[y] = newx; 90 else if (newx > win->_lastch[y]) 91 win->_lastch[y] = newx; 92 #ifdef DEBUG 93 __TRACE("ADDBYTES: change gives f/l: %d/%d [%d/%d]\n", 94 win->_firstch[y], win->_lastch[y], 95 win->_firstch[y] - win->_ch_off, 96 win->_lastch[y] - win->_ch_off); 97 #endif 98 } 99 win->_y[y][x] = c; 100 if (++x >= win->_maxx) { 101 x = 0; 102 newline: if (++y >= win->_maxy) 103 if (win->_scroll) { 104 SYNCH_OUT; 105 scroll(win); 106 SYNCH_IN; 107 --y; 108 } else 109 return (ERR); 110 } 111 #ifdef DEBUG 112 __TRACE("ADDBYTES: 2: y = %d, x = %d, firstch = %d, lastch = %d\n", 113 y, x, win->_firstch[y], win->_lastch[y]); 114 #endif 115 break; 116 case '\n': 117 SYNCH_OUT; 118 wclrtoeol(win); 119 SYNCH_IN; 120 if (origtermio.c_oflag & ONLCR) 121 x = 0; 122 goto newline; 123 case '\r': 124 x = 0; 125 break; 126 case '\b': 127 if (--x < 0) 128 x = 0; 129 break; 130 } 131 } 132 SYNCH_OUT; 133 return (OK); 134 } 135