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addbytes.c revision 1.11 
      1 /*	$NetBSD: addbytes.c,v 1.11 1997/07/22 07:36:20 mikel Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1987, 1993, 1994
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 #if 0
     39 static char sccsid[] = "@(#)addbytes.c	8.4 (Berkeley) 5/4/94";
     40 #else
     41 __RCSID("$NetBSD: addbytes.c,v 1.11 1997/07/22 07:36:20 mikel Exp $");
     42 #endif
     43 #endif	/* not lint */
     44 
     45 #include "curses.h"
     46 
     47 #define	SYNCH_IN	{y = win->cury; x = win->curx;}
     48 #define	SYNCH_OUT	{win->cury = y; win->curx = x;}
     49 
     50 /*
     51  * waddbytes --
     52  *	Add the character to the current position in the given window.
     53  */
     54 int
     55 __waddbytes(win, bytes, count, so)
     56 	register WINDOW *win;
     57 	register const char *bytes;
     58 	register int count;
     59 	int so;
     60 {
     61 	static char blanks[] = "        ";
     62 	register int c, newx, x, y;
     63 	char stand;
     64 	__LINE *lp;
     65 
     66 	SYNCH_IN;
     67 
     68 	while (count--) {
     69 		c = *bytes++;
     70 #ifdef DEBUG
     71 	__CTRACE("ADDBYTES('%c') at (%d, %d)\n", c, y, x);
     72 #endif
     73 		switch (c) {
     74 		case '\t':
     75 			SYNCH_OUT;
     76 			if (waddbytes(win, blanks, 8 - (x % 8)) == ERR)
     77 				return (ERR);
     78 			SYNCH_IN;
     79 			break;
     80 
     81 		default:
     82 #ifdef DEBUG
     83 	__CTRACE("ADDBYTES(%0.2o, %d, %d)\n", win, y, x);
     84 #endif
     85 
     86 			lp = win->lines[y];
     87 			if (lp->flags & __ISPASTEOL) {
     88 				lp->flags &= ~__ISPASTEOL;
     89 newline:			if (y == win->maxy - 1) {
     90 					if (win->flags & __SCROLLOK) {
     91 						SYNCH_OUT;
     92 						scroll(win);
     93 						SYNCH_IN;
     94 						lp = win->lines[y];
     95 					        x = 0;
     96 					} else
     97 						return (ERR);
     98 				} else {
     99 					y++;
    100 					lp = win->lines[y];
    101 					x = 0;
    102 				}
    103 				if (c == '\n')
    104 					break;
    105 			}
    106 
    107 			stand = '\0';
    108 			if (win->flags & __WSTANDOUT || so)
    109 				stand |= __STANDOUT;
    110 #ifdef DEBUG
    111 	__CTRACE("ADDBYTES: 1: y = %d, x = %d, firstch = %d, lastch = %d\n",
    112 	    y, x, *win->lines[y]->firstchp, *win->lines[y]->lastchp);
    113 #endif
    114 			if (lp->line[x].ch != c ||
    115 			    !(lp->line[x].attr & stand)) {
    116 				newx = x + win->ch_off;
    117 				if (!(lp->flags & __ISDIRTY)) {
    118 					lp->flags |= __ISDIRTY;
    119 					*lp->firstchp = *lp->lastchp = newx;
    120 				}
    121 				else if (newx < *lp->firstchp)
    122 					*lp->firstchp = newx;
    123 				else if (newx > *lp->lastchp)
    124 					*lp->lastchp = newx;
    125 #ifdef DEBUG
    126 	__CTRACE("ADDBYTES: change gives f/l: %d/%d [%d/%d]\n",
    127 	    *lp->firstchp, *lp->lastchp,
    128 	    *lp->firstchp - win->ch_off,
    129 	    *lp->lastchp - win->ch_off);
    130 #endif
    131 			}
    132 			lp->line[x].ch = c;
    133 			if (stand)
    134 				lp->line[x].attr |= __STANDOUT;
    135 			else
    136 				lp->line[x].attr &= ~__STANDOUT;
    137 			if (x == win->maxx - 1)
    138 				lp->flags |= __ISPASTEOL;
    139 			else
    140 				x++;
    141 #ifdef DEBUG
    142 	__CTRACE("ADDBYTES: 2: y = %d, x = %d, firstch = %d, lastch = %d\n",
    143 	    y, x, *win->lines[y]->firstchp, *win->lines[y]->lastchp);
    144 #endif
    145 			break;
    146 		case '\n':
    147 			SYNCH_OUT;
    148 			wclrtoeol(win);
    149 			SYNCH_IN;
    150 			if (!NONL)
    151 				x = 0;
    152 			goto newline;
    153 		case '\r':
    154 			x = 0;
    155 			break;
    156 		case '\b':
    157 			if (--x < 0)
    158 				x = 0;
    159 			break;
    160 		}
    161 	}
    162 	SYNCH_OUT;
    163 	return (OK);
    164 }
    165