newlib/libc/string/strndup_r.c

   1 #include <reent.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4
   5 char *
   6 _strndup_r (struct _reent *reent_ptr,
   7         const char   *str,
   8         size_t n)
   9 {
  10   const char *ptr = str;
  11   size_t len;
  12   char *copy;
  13
  14   while (n-- > 0 && *ptr)
  15     ptr++;
  16
  17   len = ptr - str;
  18
  19   copy = _malloc_r (reent_ptr, len + 1);
  20   if (copy)
  21     {
  22       memcpy (copy, str, len);
  23       copy[len] = '\0';
  24     }
  25   return copy;
  26 }