1 files changed, 49 insertions, 0 deletions
diff --git a/src/c-ares/ares_strdup.c b/src/c-ares/ares_strdup.c
new file mode 100644
index 000000000..0c3dcffc3
--- /dev/null
+++ b/src/c-ares/ares_strdup.c
@@ -0,0 +1,49 @@
+
+
+/* Copyright 1998 by the Massachusetts Institute of Technology.
+ *
+ * Permission to use, copy, modify, and distribute this
+ * software and its documentation for any purpose and without
+ * fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting
+ * documentation, and that the name of M.I.T. not be used in
+ * advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is"
+ * without express or implied warranty.
+ */
+
+#include "ares_setup.h"
+#include "ares_strdup.h"
+#include "ares.h"
+#include "ares_private.h"
+
+char *ares_strdup(const char *s1)
+{
+#ifdef HAVE_STRDUP
+  if (ares_malloc == malloc)
+    return strdup(s1);
+  else
+#endif
+  {
+    size_t sz;
+    char * s2;
+
+    if(s1) {
+      sz = strlen(s1);
+      if(sz < (size_t)-1) {
+        sz++;
+        if(sz < ((size_t)-1) / sizeof(char)) {
+          s2 = ares_malloc(sz * sizeof(char));
+          if(s2) {
+            memcpy(s2, s1, sz * sizeof(char));
+            return s2;
+          }
+        }
+      }
+    }
+    return (char *)NULL;
+  }
+}