*/
+#include <ansidecl.h>
+#include <stddef.h>
+
+extern size_t strlen (const char*);
+extern PTR malloc (size_t);
+extern PTR memcpy (PTR, const PTR, size_t);
+
char *
-strdup(s)
- char *s;
+strdup(const char *s)
{
- char *result = (char*)malloc(strlen(s) + 1);
- if (result == (char*)0)
- return (char*)0;
- strcpy(result, s);
- return result;
+ size_t len = strlen (s) + 1;
+ char *result = (char*) malloc (len);
+ if (result == (char*) 0)
+ return (char*) 0;
+ return (char*) memcpy (result, s, len);
}