1 files changed, 148 insertions, 0 deletions
diff --git a/contrib/sendmail/libsm/b-strcmp.c b/contrib/sendmail/libsm/b-strcmp.c
new file mode 100644
index 0000000..a713bc6
--- /dev/null
+++ b/contrib/sendmail/libsm/b-strcmp.c
@@ -0,0 +1,148 @@
+/*
+ * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers.
+ *      All rights reserved.
+ *
+ * By using this file, you agree to the terms and conditions set
+ * forth in the LICENSE file which can be found at the top level of
+ * the sendmail distribution.
+ */
+
+#include <sm/gen.h>
+SM_RCSID("@(#)$Id: b-strcmp.c,v 1.12 2001/09/11 04:04:47 gshapiro Exp $")
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sm/string.h>
+
+#define toseconds(x, y)	(x.tv_sec - y.tv_sec)
+#define SIZE	512
+#define LOOPS	4000000L	/* initial number of loops */
+#define MAXTIME	30L	/* "maximum" time to run single test */
+
+void
+fatal(str)
+	char *str;
+{
+	perror(str);
+	exit(1);
+}
+
+void
+purpose()
+{
+	printf("This program benchmarks the performance differences between\n");
+	printf("strcasecmp() and sm_strcasecmp().\n");
+	printf("These tests may take several minutes to complete.\n");
+}
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	long a;
+	int k;
+	bool doit = false;
+	long loops;
+	long j;
+	long one, two;
+	struct timeval t1, t2;
+	char src1[SIZE], src2[SIZE];
+
+# define OPTIONS	"d"
+	while ((k = getopt(argc, argv, OPTIONS)) != -1)
+	{
+		switch ((char) k)
+		{
+		  case 'd':
+			doit = true;
+			break;
+
+		  default:
+			break;
+		}
+	}
+
+	if (!doit)
+	{
+		purpose();
+		printf("If you want to run it, specify -d as option.\n");
+		return 0;
+	}
+
+	/* Run-time comments to the user */
+	purpose();
+	printf("\n");
+	for (k = 0; k < 3; k++)
+	{
+		switch (k)
+		{
+		  case 0:
+			(void) sm_strlcpy(src1, "1234567890", SIZE);
+			(void) sm_strlcpy(src2, "1234567890", SIZE);
+			break;
+		  case 1:
+			(void) sm_strlcpy(src1, "1234567890", SIZE);
+			(void) sm_strlcpy(src2, "1234567891", SIZE);
+			break;
+		  case 2:
+			(void) sm_strlcpy(src1, "1234567892", SIZE);
+			(void) sm_strlcpy(src2, "1234567891", SIZE);
+			break;
+		}
+		printf("Test %d: strcasecmp(%s, %s) versus sm_strcasecmp()\n",
+			k, src1, src2);
+		loops = LOOPS;
+		for (;;)
+		{
+			j = 0;
+			if (gettimeofday(&t1, NULL) < 0)
+				fatal("gettimeofday");
+			for (a = 0; a < loops; a++)
+				j += strcasecmp(src1, src2);
+			if (gettimeofday(&t2, NULL) < 0)
+				fatal("gettimeofday");
+			one = toseconds(t2, t1);
+			printf("\tstrcasecmp() result: %ld seconds [%ld]\n",
+				one, j);
+
+			j = 0;
+			if (gettimeofday(&t1, NULL) < 0)
+				fatal("gettimeofday");
+			for (a = 0; a < loops; a++)
+				j += sm_strcasecmp(src1, src2);
+			if (gettimeofday(&t2, NULL) < 0)
+				fatal("gettimeofday");
+			two = toseconds(t2, t1);
+			printf("\tsm_strcasecmp() result: %ld seconds [%ld]\n",
+				two, j);
+
+			if (abs(one - two) > 2)
+				break;
+			loops += loops;
+			if (loops < 0L || one > MAXTIME)
+			{
+				printf("\t\t** results too close: no decision\n");
+				break;
+			}
+			else
+			{
+				printf("\t\t** results too close redoing test %ld times **\n",
+					loops);
+			}
+		}
+	}
+
+	printf("\n\n");
+	printf("Interpreting the results:\n");
+	printf("\tFor differences larger than 2 seconds, the lower value is\n");
+	printf("\tbetter and that function should be used for performance\n");
+	printf("\treasons.\n\n");
+	printf("This program will re-run the tests when the difference is\n");
+	printf("less than 2 seconds.\n");
+	printf("The result will vary depending on the compiler optimization\n");	printf("level used. Compiling the sendmail libsm library with a\n");
+	printf("better optimization level can change the results.\n");
+	return 0;
+}