1 /* 2 * Copyright (c) 1987, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)addbytes.c 8.4 (Berkeley) 05/04/94"; 10 #endif /* not lint */ 11 12 #include "curses.h" 13 14 #define SYNCH_IN {y = win->cury; x = win->curx;} 15 #define SYNCH_OUT {win->cury = y; win->curx = x;} 16 17 /* 18 * waddbytes -- 19 * Add the character to the current position in the given window. 20 */ 21 int 22 __waddbytes(win, bytes, count, so) 23 register WINDOW *win; 24 register const char *bytes; 25 register int count; 26 int so; 27 { 28 static char blanks[] = " "; 29 register int c, newx, x, y; 30 char stand; 31 __LINE *lp; 32 33 SYNCH_IN; 34 35 #ifdef DEBUG 36 __CTRACE("ADDBYTES('%c') at (%d, %d)\n", c, y, x); 37 #endif 38 while (count--) { 39 c = *bytes++; 40 switch (c) { 41 case '\t': 42 SYNCH_OUT; 43 if (waddbytes(win, blanks, 8 - (x % 8)) == ERR) 44 return (ERR); 45 SYNCH_IN; 46 break; 47 48 default: 49 #ifdef DEBUG 50 __CTRACE("ADDBYTES(%0.2o, %d, %d)\n", win, y, x); 51 #endif 52 53 lp = win->lines[y]; 54 if (lp->flags & __ISPASTEOL) { 55 lp->flags &= ~__ISPASTEOL; 56 newline: if (y == win->maxy - 1) { 57 if (win->flags & __SCROLLOK) { 58 SYNCH_OUT; 59 scroll(win); 60 SYNCH_IN; 61 lp = win->lines[y]; 62 x = 0; 63 } else 64 return (ERR); 65 } else { 66 y++; 67 lp = win->lines[y]; 68 x = 0; 69 } 70 if (c == '\n') 71 break; 72 } 73 74 stand = '\0'; 75 if (win->flags & __WSTANDOUT || so) 76 stand |= __STANDOUT; 77 #ifdef DEBUG 78 __CTRACE("ADDBYTES: 1: y = %d, x = %d, firstch = %d, lastch = %d\n", 79 y, x, *win->lines[y]->firstchp, *win->lines[y]->lastchp); 80 #endif 81 if (lp->line[x].ch != c || 82 !(lp->line[x].attr & stand)) { 83 newx = x + win->ch_off; 84 if (!(lp->flags & __ISDIRTY)) { 85 lp->flags |= __ISDIRTY; 86 *lp->firstchp = *lp->lastchp = newx; 87 } 88 else if (newx < *lp->firstchp) 89 *lp->firstchp = newx; 90 else if (newx > *lp->lastchp) 91 *lp->lastchp = newx; 92 #ifdef DEBUG 93 __CTRACE("ADDBYTES: change gives f/l: %d/%d [%d/%d]\n", 94 *lp->firstchp, *lp->lastchp, 95 *lp->firstchp - win->ch_off, 96 *lp->lastchp - win->ch_off); 97 #endif 98 } 99 lp->line[x].ch = c; 100 if (stand) 101 lp->line[x].attr |= __STANDOUT; 102 else 103 lp->line[x].attr &= ~__STANDOUT; 104 if (x == win->maxx - 1) 105 lp->flags |= __ISPASTEOL; 106 else 107 x++; 108 #ifdef DEBUG 109 __CTRACE("ADDBYTES: 2: y = %d, x = %d, firstch = %d, lastch = %d\n", 110 y, x, *win->lines[y]->firstchp, *win->lines[y]->lastchp); 111 #endif 112 break; 113 case '\n': 114 SYNCH_OUT; 115 wclrtoeol(win); 116 SYNCH_IN; 117 if (!NONL) 118 x = 0; 119 goto newline; 120 case '\r': 121 x = 0; 122 break; 123 case '\b': 124 if (--x < 0) 125 x = 0; 126 break; 127 } 128 } 129 SYNCH_OUT; 130 return (OK); 131 } 132