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authorjtc <jtc@NetBSD.org>1993-09-16 17:39:00 +0000
committerjtc <jtc@NetBSD.org>1993-09-16 17:39:00 +0000
commit69a25a6a71efcadf0db55504379e7a74cecf54ca (patch)
tree70d25a47e8da160d611afa43ef8986aa2bbe62fa /gnu/usr.bin/diff/cmpbuf.c
parent941b6d7b199d8c66a499f0baea38c26e5882e3c6 (diff)
Updated to GNU Diffutils 2.4.
Diffstat (limited to 'gnu/usr.bin/diff/cmpbuf.c')
-rw-r--r--gnu/usr.bin/diff/cmpbuf.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/gnu/usr.bin/diff/cmpbuf.c b/gnu/usr.bin/diff/cmpbuf.c
new file mode 100644
index 00000000000..e2a4657df51
--- /dev/null
+++ b/gnu/usr.bin/diff/cmpbuf.c
@@ -0,0 +1,44 @@
+/* Buffer primitives for comparison operations.
+ Copyright (C) 1993 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#ifndef lint
+static char *rcsid = "$Id: cmpbuf.c,v 1.1 1993/09/16 17:39:04 jtc Exp $";
+#endif
+
+#include "system.h"
+#include "cmpbuf.h"
+
+/* Least common multiple of two buffer sizes A and B. */
+
+size_t
+buffer_lcm (a, b)
+ size_t a, b;
+{
+ size_t m, n, r;
+
+ /* Yield reasonable values if buffer sizes are zero. */
+ if (!a)
+ return b ? b : 8 * 1024;
+ if (!b)
+ return a;
+
+ /* n = gcd (a, b) */
+ for (m = a, n = b; (r = m % n) != 0; m = n, n = r)
+ continue;
+
+ return a/n * b;
+}