gcc/testsuite/gcc.c-torture/execute/builtins/lib/strncat.c

   1 extern void abort(void);
   2 extern int inside_main;
   3
   4 typedef __SIZE_TYPE__ size_t;
   5
   6 __attribute__ ((__noinline__))
   7 char *
   8 strncat (char *s1, const char *s2, size_t n)
   9 {
  10   char *dest = s1;
  11   char c = '\0';
  12 #ifdef __OPTIMIZE__
  13   if (inside_main)
  14     abort();
  15 #endif
  16   while (*s1) s1++;
  17   c = '\0';
  18   while (n > 0)
  19     {
  20       c = *s2++;
  21       *s1++ = c;
  22       if (c == '\0')
  23         return dest;
  24       n--;
  25     }
  26   if (c != '\0')
  27     *s1 = '\0';
  28   return dest;
  29 }