1 /* 2 * Copyright (c) 1987, 1993, 1994 3 * The Regents of the University of California. 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[] = "@(#)addbytes.c 8.4 (Berkeley) 5/4/94"; 36 #endif /* not lint */ 37 38 #include "curses.h" 39 40 #define SYNCH_IN {y = win->cury; x = win->curx;} 41 #define SYNCH_OUT {win->cury = y; win->curx = x;} 42 43 /* 44 * waddbytes -- 45 * Add the character to the current position in the given window. 46 */ 47 int 48 __waddbytes(win, bytes, count, so) 49 register WINDOW *win; 50 register const char *bytes; 51 register int count; 52 int so; 53 { 54 static char blanks[] = " "; 55 register int c, newx, x, y; 56 char stand; 57 __LINE *lp; 58 59 SYNCH_IN; 60 61 #ifdef DEBUG 62 __CTRACE("ADDBYTES('%c') at (%d, %d)\n", c, y, x); 63 #endif 64 while (count--) { 65 c = *bytes++; 66 switch (c) { 67 case '\t': 68 SYNCH_OUT; 69 if (waddbytes(win, blanks, 8 - (x % 8)) == ERR) 70 return (ERR); 71 SYNCH_IN; 72 break; 73 74 default: 75 #ifdef DEBUG 76 __CTRACE("ADDBYTES(%0.2o, %d, %d)\n", win, y, x); 77 #endif 78 79 lp = win->lines[y]; 80 if (lp->flags & __ISPASTEOL) { 81 lp->flags &= ~__ISPASTEOL; 82 newline: if (y == win->maxy - 1) { 83 if (win->flags & __SCROLLOK) { 84 SYNCH_OUT; 85 scroll(win); 86 SYNCH_IN; 87 lp = win->lines[y]; 88 x = 0; 89 } else 90 return (ERR); 91 } else { 92 y++; 93 lp = win->lines[y]; 94 x = 0; 95 } 96 if (c == '\n') 97 break; 98 } 99 100 stand = '\0'; 101 if (win->flags & __WSTANDOUT || so) 102 stand |= __STANDOUT; 103 #ifdef DEBUG 104 __CTRACE("ADDBYTES: 1: y = %d, x = %d, firstch = %d, lastch = %d\n", 105 y, x, *win->lines[y]->firstchp, *win->lines[y]->lastchp); 106 #endif 107 if (lp->line[x].ch != c || 108 !(lp->line[x].attr & stand)) { 109 newx = x + win->ch_off; 110 if (!(lp->flags & __ISDIRTY)) { 111 lp->flags |= __ISDIRTY; 112 *lp->firstchp = *lp->lastchp = newx; 113 } 114 else if (newx < *lp->firstchp) 115 *lp->firstchp = newx; 116 else if (newx > *lp->lastchp) 117 *lp->lastchp = newx; 118 #ifdef DEBUG 119 __CTRACE("ADDBYTES: change gives f/l: %d/%d [%d/%d]\n", 120 *lp->firstchp, *lp->lastchp, 121 *lp->firstchp - win->ch_off, 122 *lp->lastchp - win->ch_off); 123 #endif 124 } 125 lp->line[x].ch = c; 126 if (stand) 127 lp->line[x].attr |= __STANDOUT; 128 else 129 lp->line[x].attr &= ~__STANDOUT; 130 if (x == win->maxx - 1) 131 lp->flags |= __ISPASTEOL; 132 else 133 x++; 134 #ifdef DEBUG 135 __CTRACE("ADDBYTES: 2: y = %d, x = %d, firstch = %d, lastch = %d\n", 136 y, x, *win->lines[y]->firstchp, *win->lines[y]->lastchp); 137 #endif 138 break; 139 case '\n': 140 SYNCH_OUT; 141 wclrtoeol(win); 142 SYNCH_IN; 143 if (!NONL) 144 x = 0; 145 goto newline; 146 case '\r': 147 x = 0; 148 break; 149 case '\b': 150 if (--x < 0) 151 x = 0; 152 break; 153 } 154 } 155 SYNCH_OUT; 156 return (OK); 157 } 158