Add memcmp() test and new memcmp.c file, for SunOS. Tested by Tatsuo.

2 files changed, 38 insertions, 2 deletions

diff --git a/src/backend/port/Makefile.in b/src/backend/port/Makefile.in
index adae5364722..fdc1008743a 100644
--- a/src/backend/port/Makefile.in
+++ b/src/backend/port/Makefile.in
@@ -13,7 +13,7 @@
 # be converted to Method 2.  
 #
 # IDENTIFICATION
-#    $Header: /cvsroot/pgsql/src/backend/port/Attic/Makefile.in,v 1.29 2001/05/08 19:38:57 petere Exp $
+#    $Header: /cvsroot/pgsql/src/backend/port/Attic/Makefile.in,v 1.30 2001/12/20 21:23:05 momjian Exp $
 #
 #-------------------------------------------------------------------------
 
@@ -22,7 +22,7 @@ top_builddir = ../../..
 include $(top_builddir)/src/Makefile.global
 
 OBJS = dynloader.o @INET_ATON@ @STRERROR@ @MISSING_RANDOM@ @SRANDOM@
-OBJS+= @GETHOSTNAME@ @GETRUSAGE@ @STRCASECMP@ @TAS@ @ISINF@
+OBJS+= @GETHOSTNAME@ @GETRUSAGE@ @MEMCMP@ @STRCASECMP@ @TAS@ @ISINF@
 OBJS+= @STRTOL@ @STRTOUL@ @SNPRINTF@
 ifdef STRDUP
 OBJS += $(top_builddir)/src/utils/strdup.o
diff --git a/src/backend/port/memcmp.c b/src/backend/port/memcmp.c
new file mode 100644
index 00000000000..8e4997ace1d
--- /dev/null
+++ b/src/backend/port/memcmp.c
@@ -0,0 +1,36 @@
+/*-------------------------------------------------------------------------
+ *
+ * memcmp.c
+ *	  compares memory bytes
+ *
+ * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ *
+ * IDENTIFICATION
+ *	  $Header: /cvsroot/pgsql/src/backend/port/Attic/memcmp.c,v 1.1 2001/12/20 21:23:05 momjian Exp $
+ *
+ * This file was taken from NetBSD and is used by SunOS because memcmp
+ * on that platform does not properly compare negative bytes.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#include <string.h>
+
+/*
+ * Compare memory regions.
+ */
+int
+memcmp(const void *s1, const void *s2, size_t n)
+{
+	if (n != 0) {
+		const unsigned char *p1 = s1, *p2 = s2;
+
+		do {
+			if (*p1++ != *p2++)
+				return (*--p1 - *--p2);
+		} while (--n != 0);
+	}
+	return 0;
+}