4.3BSD - /usr/src/usr.lib/libcurses/addch.c

   1: /*
   2:  * Copyright (c) 1980 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  */
   6: 
   7: #ifndef lint
   8: static char sccsid[] = "@(#)addch.c	5.1 (Berkeley) 6/7/85";
   9: #endif not lint
  10: 
  11: # include   "curses.ext"
  12: 
  13: /*
  14:  *	This routine adds the character to the current position
  15:  *
  16:  */
  17: waddch(win, c)
  18: reg WINDOW  *win;
  19: char        c;
  20: {
  21:     reg int     x, y;
  22:     reg WINDOW  *wp;
  23:     reg int     newx;
  24: 
  25:     x = win->_curx;
  26:     y = win->_cury;
  27: # ifdef FULLDEBUG
  28:     fprintf(outf, "ADDCH('%c') at (%d, %d)\n", c, y, x);
  29: # endif
  30:     switch (c) {
  31:       case '\t':
  32:         for (newx = x + (8 - (x & 07)); x < newx; x++)
  33:             if (waddch(win, ' ') == ERR)
  34:                 return ERR;
  35:         return OK;
  36: 
  37:       default:
  38: # ifdef FULLDEBUG
  39:         fprintf(outf, "ADDCH: 1: y = %d, x = %d, firstch = %d, lastch = %d\n", y, x, win->_firstch[y], win->_lastch[y]);
  40: # endif
  41:         if (win->_flags & _STANDOUT)
  42:             c |= _STANDOUT;
  43:         set_ch(win, y, x, c);
  44:         win->_y[y][x++] = c;
  45:         if (x >= win->_maxx) {
  46:             x = 0;
  47: newline:
  48:             if (++y >= win->_maxy)
  49:                 if (win->_scroll) {
  50:                     scroll(win);
  51:                     --y;
  52:                 }
  53:                 else
  54:                     return ERR;
  55:         }
  56: # ifdef FULLDEBUG
  57:         fprintf(outf, "ADDCH: 2: y = %d, x = %d, firstch = %d, lastch = %d\n", y, x, win->_firstch[y], win->_lastch[y]);
  58: # endif
  59:         break;
  60:       case '\n':
  61:         wclrtoeol(win);
  62:         if (!NONL)
  63:             x = 0;
  64:         goto newline;
  65:       case '\r':
  66:         x = 0;
  67:         break;
  68:       case '\b':
  69:         if (--x < 0)
  70:             x = 0;
  71:         break;
  72:     }
  73:     win->_curx = x;
  74:     win->_cury = y;
  75:     return OK;
  76: }
  77: 
  78: /*
  79:  * set_ch:
  80:  *	Set the first and last change flags for this window.
  81:  */
  82: static
  83: set_ch(win, y, x, ch)
  84: reg WINDOW  *win;
  85: int     y, x;
  86: {
  87: # ifdef FULLDEBUG
  88:     fprintf(outf, "SET_CH(%0.2o, %d, %d)\n", win, y, x);
  89: # endif
  90:     if (win->_y[y][x] != ch) {
  91:         x += win->_ch_off;
  92:         if (win->_firstch[y] == _NOCHANGE)
  93:             win->_firstch[y] = win->_lastch[y] = x;
  94:         else if (x < win->_firstch[y])
  95:             win->_firstch[y] = x;
  96:         else if (x > win->_lastch[y])
  97:             win->_lastch[y] = x;
  98: # ifdef FULLDEBUG
  99:         fprintf(outf, "SET_CH: change gives f/l: %d/%d [%d/%d]\n",
 100:             win->_firstch[y], win->_lastch[y],
 101:             win->_firstch[y] - win->_ch_off,
 102:             win->_lastch[y] - win->_ch_off);
 103: # endif
 104:     }
 105: }

Defined functions

Defined variables