This patch originates from the Debian project, see https://www.debian.org/

18dbpagesize_binpower.dpatch by  <hesso@pool.math.tu-berlin.de>


Make sure that the pagesize passed to db__set_pagesize() is a power of two.

nvi stores the content of files in BDB database structures. When initiating a
file, it picks a page size for the database to fit the file within 15 pages,
with a minimal page size of 1K and maximal of 10K.

In vanilla nvi, this size is calculated as a multiple of 1024. Modern versions
of BDB, however, require the page size of a database to be a power of two, which
this patch addresses, ridding us of the following message:

  BDB0511 page sizes must be a power-of-2

--- nvi-1.81.6.orig/common/exf.c	2009-03-09 01:48:01.695862889 +0100
+++ nvi-1.81.6/common/exf.c	2009-03-09 10:42:41.147866272 +0100
@@ -249,11 +249,10 @@
 		 * (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;
+		if (psize >= 8) psize=8<<10;
+		else if (psize >= 4) psize=4<<10;
+		else if (psize >= 2) psize=2<<10;
+		else psize=1<<10;
 
 		F_SET(ep, F_DEVSET);
 		ep->mdev = sb.st_dev;
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<div class='path'>path: <a href='/guix/log/?id=ecfcdff23a5ce390a7edc019c1f1216c4843dc04'>root</a>/<a href='/guix/log/CODE-OF-CONDUCT?id=ecfcdff23a5ce390a7edc019c1f1216c4843dc04'>CODE-OF-CONDUCT</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/CODE-OF-CONDUCT?id=ecfcdff23a5ce390a7edc019c1f1216c4843dc04&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-03-01 13:18:01 -0500'>2022-03-01</span></td><td><a href='/guix/commit/CODE-OF-CONDUCT?id=c67912011154e2b347cdf6f3e633e87fd44f409c'>CODE-OF-CONDUCT: Add a top notice.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-03-01 13:07:04 -0500'>2022-03-01</span></td><td><a href='/guix/commit/CODE-OF-CONDUCT?id=4254d74b4ca6d4aa78b7fa055fc9ec72a2e93ad3'>CODE-OF-CONDUCT: Update to version 2.1.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>