editors/nvi: Add patch-power-of-2

See https://trac.macports.org/ticket/22228.

1 files changed, 31 insertions, 0 deletions

diff --git a/editors/nvi/patch-power-of-2 b/editors/nvi/patch-power-of-2
new file mode 100644
index 0000000..5f6aaff
--- /dev/null
+++ b/editors/nvi/patch-power-of-2
@@ -0,0 +1,31 @@
+$NetBSD
+
+Get rid of "page sizes must be a power-of-2" warning when loading a file.
+
+--- common/exf.c.orig	2021-07-12 21:21:22.247541289 +0200
++++ common/exf.c
+@@ -228,15 +228,17 @@ file_init(SCR *sp, FREF *frp, char *rcv_name, int flags)
+ 		/*
+ 		 * XXX
+ 		 * A seat of the pants calculation: try to keep the file in
+-		 * 15 pages or less.  Don't use a page size larger than 10K
++		 * 15 pages or less.  Don't use a page size larger than 16K
+ 		 * (vi should have good locality) or smaller than 1K.
+ 		 */
+-		psize = ((sb.st_size / 15) + 1023) / 1024;
+-		if (psize > 10)
+-			psize = 10;
+-		if (psize == 0)
+-			psize = 1;
+-		psize *= 1024;
++		psize = (sb.st_size > 0) ? ffsl(sb.st_size - 1) + 1 : 0;
++		/* Do these very low limits make sense anymore? */
++		if (psize < 10)
++			psize = 10;  /* 1K */
++		if (psize > 14)
++			psize = 14;  /* 16K */
++		/* Keep page size on power of 2 boundary to keep db4 happy. */
++		psize = 1 << psize;
+ 
+ 		F_SET(ep, F_DEVSET);
+ 		ep->mdev = sb.st_dev;