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typedef __SIZE_TYPE__ size_t;

void *memmove (void *dest, const void *src, size_t count);

size_t strlen (const char *s);

int

foo (char *param, char *val)

{

  if (val)

    {

      if (val == param + strlen (param) + 1)

        val[-1] = '=';

      else if (val == param + strlen (param) + 2)

        {

          val[-2] = '=';

          memmove (val - 1, val, strlen (val) + 1);

          val--;

        }

    }

  return 0;

}