Moved from ports with several enhancements

1 files changed, 86 insertions, 0 deletions

diff --git a/lib/libncurses/lib_addch.c b/lib/libncurses/lib_addch.c
new file mode 100644
index 0000000..50c4ae7
--- /dev/null
+++ b/lib/libncurses/lib_addch.c
@@ -0,0 +1,86 @@
+
+/* This work is copyrighted. See COPYRIGHT.OLD & COPYRIGHT.NEW for   *
+*  details. If they are missing then this copy is in violation of    *
+*  the copyright conditions.                                        */
+
+/*
+**	lib_addch.c
+**
+**	The routine waddch().
+**
+*/
+
+#include "curses.priv.h"
+#include "unctrl.h"
+
+int
+waddch(WINDOW *win, chtype c)
+{
+int	x, y;
+int	newx;
+chtype	ch = c;
+
+#if 0	
+	/* enabling this causes tons of tracing output
+	   and slow ncurses down to a crawl */
+	T(("waddch(%x,%c (%x)) called", win, ch&A_CHARTEXT, ch));
+#endif
+
+	x = win->_curx;
+	y = win->_cury;
+
+	if (y > win->_maxy  ||  x > win->_maxx  ||  y < 0  ||  x < 0)
+	    return(ERR);
+
+	switch (ch&A_CHARTEXT) {
+    	case '\t':
+		for (newx = x + (8 - (x & 07)); x < newx; x++)
+	    		if (waddch(win, ' ') == ERR)
+				return(ERR);
+		return(OK);
+    	case '\n':
+		wclrtoeol(win);
+    	x = 0;
+		goto newline;
+    	case '\r':
+		x = 0;
+		break;
+    	case '\b':
+		if (--x < 0)
+		    	x = 0;
+		break;
+    	default:
+		if (ch < ' ')
+		    	return(waddstr(win, unctrl(ch)));
+
+		ch |= win->_attrs;
+
+		if (win->_line[y][x] != ch) {
+		    	if (win->_firstchar[y] == _NOCHANGE)
+				win->_firstchar[y] = win->_lastchar[y] = x;
+		    	else if (x < win->_firstchar[y])
+				win->_firstchar[y] = x;
+		    	else if (x > win->_lastchar[y])
+				win->_lastchar[y] = x;
+
+		}
+
+		win->_line[y][x++] = ch;
+		if (x > win->_maxx) {
+		    	x = 0;
+newline:
+		    	y++;
+		    	if (y > win->_regbottom) {
+				y--;
+				if (win->_scroll)
+				    	scroll(win);
+		    	}
+		}
+		break;
+	}
+
+	win->_curx = x;
+	win->_cury = y;
+
+	return(OK);
+}