1 files changed, 55 insertions, 0 deletions
diff --git a/contrib/ntp/libntp/strdup.c b/contrib/ntp/libntp/strdup.c
new file mode 100644
index 000000000000..8af9ff81b39c
--- /dev/null
+++ b/contrib/ntp/libntp/strdup.c
@@ -0,0 +1,55 @@
+#include <config.h>
+
+#include <ntp_assert.h>
+#include <string.h>
+#include "ntp_malloc.h"
+#include "l_stdlib.h"
+
+#define STRDUP_EMPTY_UNIT
+
+#ifndef HAVE_STRDUP
+# undef STRDUP_EMPTY_UNIT
+char *strdup(const char *s);
+char *
+strdup(
+	const char *s
+	)
+{
+	size_t	octets;
+	char *	cp;
+
+	REQUIRE(s);
+	octets = strlen(s) + 1;
+	if ((cp = malloc(octets)) == NULL)
+		return NULL;
+	memcpy(cp, s, octets);
+
+	return cp;
+}
+#endif
+
+#ifndef HAVE_MEMCHR
+# undef STRDUP_EMPTY_UNIT
+void *memchr(const void *s, int c, size_t n)
+{
+	const unsigned char *p = s;
+	while (n && *p != c) {
+		--n;
+		++p;
+	}
+	return n ? (char*)p : NULL;
+}
+#endif
+
+#ifndef HAVE_STRNLEN
+# undef STRDUP_EMPTY_UNIT
+size_t strnlen(const char *s, size_t n)
+{
+	const char *e = memchr(s, 0, n);
+	return e ? (size_t)(e - s) : n;
+}
+#endif
+
+#ifdef STRDUP_EMPTY_UNIT
+int strdup_c_nonempty_compilation_unit;
+#endif