initial import of NetBSD tree

1 files changed, 244 insertions, 0 deletions

diff --git a/lib/libcurses/newwin.c b/lib/libcurses/newwin.c
new file mode 100644
index 00000000000..8f09cbf7966
--- /dev/null
+++ b/lib/libcurses/newwin.c
@@ -0,0 +1,244 @@
+/*
+ * Copyright (c) 1981, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)newwin.c	8.3 (Berkeley) 7/27/94";
+#endif	/* not lint */
+
+#include <stdlib.h>
+
+#include "curses.h"
+
+#undef	nl		/* Don't need it here, and it interferes. */
+
+static WINDOW 	*__makenew __P((int, int, int, int, int));
+
+void	 __set_subwin __P((WINDOW *, WINDOW *));
+
+/*
+ * newwin --
+ *	Allocate space for and set up defaults for a new window.
+ */
+WINDOW *
+newwin(nl, nc, by, bx)
+	register int nl, nc, by, bx;
+{
+	register WINDOW *win;
+	register __LINE *lp;
+	register int  i, j;
+	register __LDATA *sp;
+
+	if (nl == 0)
+		nl = LINES - by;
+	if (nc == 0)
+		nc = COLS - bx;
+
+	if ((win = __makenew(nl, nc, by, bx, 0)) == NULL)
+		return (NULL);
+
+	win->nextp = win;
+	win->ch_off = 0;
+	win->orig = NULL;
+
+#ifdef DEBUG
+	__CTRACE("newwin: win->ch_off = %d\n", win->ch_off);
+#endif
+
+	for (i = 0; i < nl; i++) {
+		lp = win->lines[i];
+		lp->flags = 0;
+		for (sp = lp->line, j = 0; j < nc; j++, sp++) {
+			sp->ch = ' ';
+			sp->attr = 0;
+		}
+		lp->hash = __hash((char *) lp->line, nc * __LDATASIZE);
+	}
+	return (win);
+}
+
+WINDOW *
+subwin(orig, nl, nc, by, bx)
+	register WINDOW *orig;
+	register int by, bx, nl, nc;
+{
+	int i;
+	__LINE *lp;
+	register WINDOW *win;
+
+	/* Make sure window fits inside the original one. */
+#ifdef	DEBUG
+	__CTRACE("subwin: (%0.2o, %d, %d, %d, %d)\n", orig, nl, nc, by, bx);
+#endif
+	if (by < orig->begy || bx < orig->begx
+	    || by + nl > orig->maxy + orig->begy
+	    || bx + nc > orig->maxx + orig->begx)
+		return (NULL);
+	if (nl == 0)
+		nl = orig->maxy + orig->begy - by;
+	if (nc == 0)
+		nc = orig->maxx + orig->begx - bx;
+	if ((win = __makenew(nl, nc, by, bx, 1)) == NULL)
+		return (NULL);
+	win->nextp = orig->nextp;
+	orig->nextp = win;
+	win->orig = orig;
+
+	/* Initialize flags here so that refresh can also use __set_subwin. */
+	for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++)
+		lp->flags = 0;
+	__set_subwin(orig, win);
+	return (win);
+}
+
+/*
+ * This code is shared with mvwin().
+ */
+void
+__set_subwin(orig, win)
+	register WINDOW *orig, *win;
+{
+	int i;
+	__LINE *lp, *olp;
+
+	win->ch_off = win->begx - orig->begx;
+	/*  Point line pointers to line space. */
+	for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) {
+		win->lines[i] = lp;
+		olp = orig->lines[i + win->begy];
+		lp->line = &olp->line[win->begx];
+		lp->firstchp = &olp->firstch;
+		lp->lastchp = &olp->lastch;
+		lp->hash = __hash((char *) lp->line, win->maxx * __LDATASIZE);
+	}
+
+#ifdef DEBUG
+	__CTRACE("__set_subwin: win->ch_off = %d\n", win->ch_off);
+#endif
+}
+
+/*
+ * __makenew --
+ *	Set up a window buffer and returns a pointer to it.
+ */
+static WINDOW *
+__makenew(nl, nc, by, bx, sub)
+	register int by, bx, nl, nc;
+	int sub;
+{
+	register WINDOW *win;
+	register __LINE *lp;
+	int i;
+	
+
+#ifdef	DEBUG
+	__CTRACE("makenew: (%d, %d, %d, %d)\n", nl, nc, by, bx);
+#endif
+	if ((win = malloc(sizeof(*win))) == NULL)
+		return (NULL);
+#ifdef DEBUG
+	__CTRACE("makenew: nl = %d\n", nl);
+#endif
+
+	/* 
+	 * Set up line pointer array and line space.
+	 */
+	if ((win->lines = malloc (nl * sizeof(__LINE *))) == NULL) {
+		free(win);
+		return NULL;
+	}
+	if ((win->lspace = malloc (nl * sizeof(__LINE))) == NULL) {
+		free (win);
+		free (win->lines);
+		return NULL;
+	}
+
+	/* Don't allocate window and line space if it's a subwindow */
+	if (!sub) {
+		/*
+		 * Allocate window space in one chunk.
+		 */
+		if ((win->wspace = 
+		    malloc(nc * nl * sizeof(__LDATA))) == NULL) {
+			free(win->lines);
+			free(win->lspace);
+			free(win);
+			return NULL;
+		}
+		
+		/*
+		 * Point line pointers to line space, and lines themselves into
+		 * window space.
+		 */
+		for (lp = win->lspace, i = 0; i < nl; i++, lp++) {
+			win->lines[i] = lp;
+			lp->line = &win->wspace[i * nc];
+			lp->firstchp = &lp->firstch;
+			lp->lastchp = &lp->lastch;
+			lp->firstch = 0;
+			lp->lastch = 0;
+		}
+	}
+#ifdef DEBUG
+	__CTRACE("makenew: nc = %d\n", nc);
+#endif
+	win->cury = win->curx = 0;
+	win->maxy = nl;
+	win->maxx = nc;
+
+	win->begy = by;
+	win->begx = bx;
+	win->flags = 0;
+	__swflags(win);
+#ifdef DEBUG
+	__CTRACE("makenew: win->flags = %0.2o\n", win->flags);
+	__CTRACE("makenew: win->maxy = %d\n", win->maxy);
+	__CTRACE("makenew: win->maxx = %d\n", win->maxx);
+	__CTRACE("makenew: win->begy = %d\n", win->begy);
+	__CTRACE("makenew: win->begx = %d\n", win->begx);
+#endif
+	return (win);
+}
+
+void
+__swflags(win)
+	register WINDOW *win;
+{
+	win->flags &= ~(__ENDLINE | __FULLWIN | __SCROLLWIN | __LEAVEOK);
+	if (win->begx + win->maxx == COLS) {
+		win->flags |= __ENDLINE;
+		if (win->begx == 0 && win->maxy == LINES && win->begy == 0)
+			win->flags |= __FULLWIN;
+		if (win->begy + win->maxy == LINES)
+			win->flags |= __SCROLLWIN;
+	}
+}