Moved from ports with several enhancements

1 files changed, 177 insertions, 0 deletions

diff --git a/lib/libncurses/lib_newwin.c b/lib/libncurses/lib_newwin.c
new file mode 100644
index 0000000..f732a7c
--- /dev/null
+++ b/lib/libncurses/lib_newwin.c
@@ -0,0 +1,177 @@
+
+/* 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_newwin.c
+**
+**	The routines newwin(), subwin() and their dependent
+**
+*/
+
+#include <stdlib.h>
+#include <nterm.h>
+#include "curses.priv.h"
+
+WINDOW * newwin(int num_lines, int num_columns, int begy, int begx)
+{
+WINDOW	*win;
+chtype	*ptr;
+int	i, j;
+
+	T(("newwin(%d,%d,%d,%d) called", num_lines, num_columns, begy, begx));
+
+	if (num_lines == 0)
+	    num_lines = lines - begy;
+
+	if (num_columns == 0)
+	    num_columns = columns - begx;
+
+	if (num_columns + begx > columns || num_lines + begy > lines)
+		return NULL;
+
+	if ((win = makenew(num_lines, num_columns, begy, begx)) == NULL)
+		return NULL;
+
+	for (i = 0; i < num_lines; i++) {
+	    if ((win->_line[i] = (chtype *) calloc(num_columns, sizeof(chtype))) == NULL) {
+			for (j = 0; j < i; j++)
+			    free(win->_line[j]);
+
+			free(win->_firstchar);
+			free(win->_lastchar);
+			free(win->_line);
+			free(win);
+
+			return NULL;
+	    }
+	    else
+		for (ptr = win->_line[i]; ptr < win->_line[i] + num_columns; )
+		    *ptr++ = ' ';
+	}
+
+	T(("newwin: returned window is %x", win));
+
+	return(win);
+}
+
+WINDOW * derwin(WINDOW *orig, int num_lines, int num_columns, int begy, int begx)
+{
+WINDOW	*win;
+int	i;
+
+	T(("derwin(%x, %d,%d,%d,%d) called", orig, num_lines, num_columns, begy, begx));
+
+	/*
+	** make sure window fits inside the original one
+	*/
+	if ( begy < 0 || begx < 0) 
+		return NULL;
+	if ( begy + num_lines > orig->_maxy + 1
+		|| begx + num_columns > orig->_maxx + 1)
+	    return NULL;
+
+	if (num_lines == 0)
+	    num_lines = orig->_maxy - orig->_begy - begy;
+
+	if (num_columns == 0)
+	    num_columns = orig->_maxx - orig->_begx - begx;
+
+	if ((win = makenew(num_lines, num_columns, orig->_begy + begy, orig->_begx + begx)) == NULL)
+	    return NULL;
+
+	win->_pary = begy;
+	win->_parx = begx;
+
+	for (i = 0; i < num_lines; i++)
+	    win->_line[i] = &orig->_line[begy++][begx];
+
+	win->_flags = _SUBWIN;
+	win->_parent = orig;
+
+	T(("derwin: returned window is %x", win));
+
+	return(win);
+}
+
+
+WINDOW *subwin(WINDOW *w, int l, int c, int y, int x)
+{
+	T(("subwin(%x, %d, %d, %d, %d) called", w, l, c, y, x));
+	T(("parent has begy = %d, begx = %d", w->_begy, w->_begx));
+
+	return derwin(w, l, c, y - w->_begy, x - w->_begx); 
+}
+
+WINDOW *
+makenew(int num_lines, int num_columns, int begy, int begx)
+{
+int	i;
+WINDOW	*win;
+
+	T(("makenew(%d,%d,%d,%d)", num_lines, num_columns, begy, begx));
+
+	if ((win = (WINDOW *) malloc(sizeof(WINDOW))) == NULL)
+		return NULL;            
+
+	if ((win->_line = (chtype **) calloc(num_lines, sizeof (chtype *))) == NULL) {
+		free(win);
+		return NULL;               
+	}
+
+	if ((win->_firstchar = calloc(num_lines, sizeof(short))) == NULL) {
+		free(win);
+		free(win->_line);
+		return NULL;             
+	}
+
+	if ((win->_lastchar = calloc(num_lines, sizeof(short))) == NULL) {
+		free(win);
+		free(win->_line);
+		free(win->_firstchar);
+		return NULL;            
+	}
+
+	win->_curx       = 0;
+	win->_cury       = 0;
+	win->_maxy       = num_lines - 1;
+	win->_maxx       = num_columns - 1;
+	win->_begy       = begy;
+	win->_begx       = begx;
+
+	win->_flags      = 0;
+	win->_attrs      = A_NORMAL;
+
+	win->_clear      = (num_lines == lines  &&  num_columns == columns);
+	win->_idlok      = FALSE;
+	win->_use_idc      = TRUE;
+	win->_scroll     = FALSE;
+	win->_leave      = FALSE;
+	win->_use_keypad = FALSE;
+	win->_use_meta   = FALSE;
+	win->_delay    	 = -1;   
+	win->_immed	 = FALSE;
+	win->_sync	 = 0;
+	win->_parx	 = 0;
+	win->_pary	 = 0;
+	win->_parent	 = (WINDOW *)NULL;
+
+	win->_regtop     = 0;
+	win->_regbottom  = num_lines - 1;
+
+	for (i = 0; i < num_lines; i++)
+	    win->_firstchar[i] = win->_lastchar[i] = _NOCHANGE;
+
+	if (begx + num_columns == columns) {
+		win->_flags |= _ENDLINE;
+
+		if (begx == 0  &&  num_lines == lines  &&  begy == 0)
+			win->_flags |= _FULLWIN;
+
+		if (begy + num_lines == lines)
+			win->_flags |= _SCROLLWIN;
+	}
+
+	return(win);
+}