Imported Upstream version 3.22upstream/3.22

1 files changed, 73 insertions, 0 deletions

diff --git a/src/tc-memmem.c b/src/tc-memmem.c
new file mode 100644
index 0000000..9c59c7f
--- /dev/null
+++ b/src/tc-memmem.c
@@ -0,0 +1,73 @@
+/*
+ *	speed test HX_memmem
+ *	Copyright Jan Engelhardt
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the WTF Public License version 2 or
+ *	(at your option) any later version.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <libHX/init.h>
+#include <libHX/misc.h>
+#include <libHX/string.h>
+
+static unsigned int size = 1048576 * 64;
+static const char filler_text[] =
+	"Slhrdlu cringle tongle flonging blobbity bleep blingmangl";
+
+static void long_scan(void)
+{
+	struct timespec start, stop, delta;
+	char *filler2, *p;
+
+	filler2 = malloc(size);
+	if (filler2 == NULL)
+		abort();
+	memset(filler2, 'l', size);
+	filler2[size-2] = 'a';
+
+	clock_gettime(CLOCK_THREAD_CPUTIME_ID, &start);
+	p = HX_memmem(filler2, strlen(filler2), "al", 2);
+	clock_gettime(CLOCK_THREAD_CPUTIME_ID, &stop);
+	printf("long_scan: filler2=%p p=%p\n", filler2, p);
+	HX_timespec_sub(&delta, &stop, &start);
+	printf("long_scan: " HX_TIMESPEC_FMT "\n", HX_TIMESPEC_EXP(&delta));
+}
+
+int main(void)
+{
+	unsigned int i;
+	char *haystack;
+	struct timespec start, stop, delta;
+
+	if (HX_init() <= 0)
+		abort();
+	haystack = malloc(size);
+	if (haystack == NULL)
+		abort();
+	memset(haystack, 'A', size);
+	haystack[size-1] = haystack[size-2] = 'Z';
+	printf("Init done\n");
+	printf("Start=%p End=%p\n", filler_text,
+	       filler_text + ARRAY_SIZE(filler_text));
+	printf("%p\n", HX_memmem(filler_text, strlen(filler_text), "nangl", 5));
+	printf("%p\n", HX_memmem(filler_text, strlen(filler_text), "angl", 4));
+	printf("%p\n", HX_memmem(filler_text, strlen(filler_text), "ngl", 3));
+	printf("%p\n", HX_memmem(filler_text, strlen(filler_text), "ngl", 3));
+
+	long_scan();
+
+	for (i = 0; i < 10; ++i) {
+		printf("Search length %u...", i);
+		clock_gettime(CLOCK_THREAD_CPUTIME_ID, &start);
+		HX_memmem(haystack, size, haystack + size - i, i);
+		clock_gettime(CLOCK_THREAD_CPUTIME_ID, &stop);
+		HX_timespec_sub(&delta, &stop, &start);
+		printf(HX_TIMESPEC_FMT "\n", HX_TIMESPEC_EXP(&delta));
+	}
+
+	HX_exit();
+	return EXIT_SUCCESS;
+}