Moved from ports with several enhancements

1 files changed, 50 insertions, 0 deletions

diff --git a/lib/libncurses/lib_erase.c b/lib/libncurses/lib_erase.c
new file mode 100644
index 0000000..221a04c
--- /dev/null
+++ b/lib/libncurses/lib_erase.c
@@ -0,0 +1,50 @@
+
+/* 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_erase.c
+**
+**	The routine werase().
+**
+*/
+
+#include "curses.priv.h"
+#include <nterm.h>
+
+#define BLANK ' '
+
+int  werase(WINDOW	*win)
+{
+int	y;
+chtype	*sp, *end, *start, *maxx = NULL;
+int	minx;
+
+	T(("werase(%x) called", win));
+
+	for (y = win->_regtop; y <= win->_regbottom; y++) {
+	    	minx = _NOCHANGE;
+	    	start = win->_line[y];
+	    	end = &start[win->_maxx];
+	
+	    	maxx = start;
+	    	for (sp = start; sp <= end; sp++) {
+		    	maxx = sp;
+		    	if (minx == _NOCHANGE)
+					minx = sp - start;
+		    	*sp = BLANK;
+	    	}
+
+	    	if (minx != _NOCHANGE) {
+			if (win->_firstchar[y] > minx ||
+		    	    win->_firstchar[y] == _NOCHANGE)
+		    		win->_firstchar[y] = minx;
+
+			if (win->_lastchar[y] < maxx - win->_line[y])
+		    	win->_lastchar[y] = maxx - win->_line[y];
+	    	}
+	}
+	win->_curx = win->_cury = 0;
+	return OK;
+}