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addbytes.c revision 1.1.1.2 
      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