1 files changed, 86 insertions, 0 deletions

diff --git a/src/tc-string.c b/src/tc-string.c
index 826a9a0..112a845 100644
--- a/src/tc-string.c
+++ b/src/tc-string.c
@@ -12,12 +12,14 @@
 #	include <stddef.h>
 #	include <stdio.h>
 #	include <stdlib.h>
+#	include <time.h>
 #else
 #	include <cassert>
 #	include <cerrno>
 #	include <cstddef>
 #	include <cstdio>
 #	include <cstdlib>
+#	include <ctime>
 #endif
 #include <libHX/defs.h>
 #include <libHX/init.h>
@@ -194,6 +196,89 @@ static void t_split2(void)
 	HX_zvecfree(a);
 }
 
+/* avoid these being inlined */
+extern char *f_strlcpy_str(char *, const char *, size_t);
+extern char *f_strlcpy_mem(char *, const char *, size_t);
+
+EXPORT_SYMBOL char *f_strlcpy_str(char *d, const char *s, size_t n)
+{
+	strncpy(d, s, n);
+	d[n-1] = '\0';
+	return d;
+}
+
+EXPORT_SYMBOL char *f_strlcpy_mem(char *dest, const char *src, size_t dsize)
+{
+	size_t slen = strlen(src);
+	if (slen < dsize)
+		return static_cast(char *, memcpy(dest, src, slen + 1));
+	if (dsize > 0) {
+		memcpy(dest, src, dsize - 1);
+		dest[dsize-1] = '\0';
+	}
+	return dest;
+}
+
+static const char s_lorem_ipsum[] = /* 1368 chars */
+"Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo "
+"ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis "
+"parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, "
+"pellentesque eu, pretium quis, sem. Nulla consequat massa quis enim. Donec "
+"pede justo, fringilla vel, aliquet nec, vulputate eget, arcu. In enim justo, "
+"rhoncus ut, imperdiet a, venenatis vitae, justo. Nullam dictum felis eu pede "
+"mollis pretium. Integer tincidunt. Cras dapibus. Vivamus elementum semper "
+"nisi. Aenean vulputate eleifend tellus. Aenean leo ligula, porttitor eu, "
+"consequat vitae, eleifend ac, enim. Aliquam lorem ante, dapibus in, viverra "
+"quis, feugiat a, tellus. Phasellus viverra nulla ut metus varius laoreet. "
+"Quisque rutrum. Aenean imperdiet. Etiam ultricies nisi vel augue. Curabitur "
+"ullamcorper ultricies nisi. Nam eget dui. Etiam rhoncus. Maecenas tempus, "
+"tellus eget condimentum rhoncus, sem quam semper libero, sit amet adipiscing "
+"sem neque sed ipsum. Nam quam nunc, blandit vel, luctus pulvinar, hendrerit "
+"id, lorem. Maecenas nec odio et ante tincidunt tempus. Donec vitae sapien ut "
+"libero venenatis faucibus. Nullam quis ante. Etiam sit amet orci eget eros "
+"faucibus tincidunt. Duis leo. Sed fringilla mauris sit amet nibh. Donec "
+"sodales sagittis magna. Sed consequat, leo eget bibendum sodales, augue velit "
+"cursus nunc,";
+
+static void t_strlcpy(void)
+{
+	static const size_t picksizes[] =
+		{4, 8, 16, 32, 64, 80, 128, 256, 1024, 2048};
+	char ibuf[2048], obuf[2048];
+	size_t ipick, opick, k, runs = 10000000 + HX_irand(0, 1);
+	struct timespec start, stop, d1, d2, d3;
+
+	for (ipick = 0; ipick < ARRAY_SIZE(picksizes); ++ipick) {
+		/* Select string size */
+		HX_strlcpy(ibuf, s_lorem_ipsum, picksizes[ipick]);
+
+		for (opick = 0; opick < ARRAY_SIZE(picksizes); ++opick) {
+			/* Select buffer size */
+			clock_gettime(CLOCK_MONOTONIC, &start);
+			for (k = 0; k < runs; ++k)
+				f_strlcpy_str(reinterpret_cast(char *, obuf),
+					ibuf, picksizes[opick]);
+			clock_gettime(CLOCK_MONOTONIC, &stop);
+			HX_timespec_sub(&d1, &stop, &start);
+
+			clock_gettime(CLOCK_MONOTONIC, &start);
+			for (k = 0; k < runs; ++k)
+				f_strlcpy_mem(reinterpret_cast(char *, obuf),
+					ibuf, picksizes[opick]);
+			clock_gettime(CLOCK_MONOTONIC, &stop);
+			HX_timespec_sub(&d2, &stop, &start);
+
+			HX_timespec_sub(&d3, &d1, &d2);
+			printf("%4zu->%4zu: %1ld.%09ld (str=%ld.%09ld mem=%ld.%09ld)\n",
+				strlen(ibuf), picksizes[opick],
+				static_cast(long, d3.tv_sec), d3.tv_nsec,
+				static_cast(long, d1.tv_sec), d1.tv_nsec,
+				static_cast(long, d2.tv_sec), d2.tv_nsec
+				);
+		}
+	}
+}
+
 int main(int argc, const char **argv)
 {
 	hxmc_t *tx = NULL;
@@ -222,6 +307,7 @@ int main(int argc, const char **argv)
 	t_strtrim();
 	t_split();
 	t_split2();
+	t_strlcpy();
 	HXmc_free(tx);
 	HX_exit();
 	return EXIT_SUCCESS;