Copy over string performance tests into benchtests

Copy over already existing string performance tests into benchtests.
Bits not related to performance measurements have been omitted.

1 files changed, 59 insertions, 0 deletions

diff --git a/benchtests/bench-stpncpy.c b/benchtests/bench-stpncpy.c
new file mode 100644
index 0000000..65ed800
--- /dev/null
+++ b/benchtests/bench-stpncpy.c
@@ -0,0 +1,59 @@
+/* Measure stpncpy functions.
+   Copyright (C) 2013 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#define STRNCPY_RESULT(dst, len, n) ((dst) + ((len) > (n) ? (n) : (len)))
+#define TEST_MAIN
+#define TEST_NAME "stpncpy"
+#include "bench-string.h"
+
+char *simple_stpncpy (char *, const char *, size_t);
+char *stupid_stpncpy (char *, const char *, size_t);
+
+IMPL (stupid_stpncpy, 0)
+IMPL (simple_stpncpy, 0)
+IMPL (stpncpy, 1)
+
+char *
+simple_stpncpy (char *dst, const char *src, size_t n)
+{
+  while (n--)
+    if ((*dst++ = *src++) == '\0')
+      {
+	size_t i;
+
+	for (i = 0; i < n; ++i)
+	  dst[i] = '\0';
+	return dst - 1;
+      }
+  return dst;
+}
+
+char *
+stupid_stpncpy (char *dst, const char *src, size_t n)
+{
+  size_t nc = strnlen (src, n);
+  size_t i;
+
+  for (i = 0; i < nc; ++i)
+    dst[i] = src[i];
+  for (; i < n; ++i)
+    dst[i] = '\0';
+  return dst + nc;
+}
+
+#include "bench-strncpy.c"