isoc/newlib/strncpy.c

1 // SPDX-License-Identifier: BSD-3-Clause
3  * Copyright (c) 1994-2009  Red Hat, Inc.
35 	<<strncpy>>---counted copy string
82   (((long)X & (sizeof (long) - 1)) | ((long)Y & (sizeof (long) - 1)))
85 #define DETECTNULL(X) (((X) - 0x01010101) & ~(X) & 0x80808080)
89 #define DETECTNULL(X) (((X) - 0x0101010101010101) & ~(X) & 0x8080808080808080)
105 	size_t count)
113   while (count > 0)
115       --count;
119   while (count-- > 0)
129   /* If SRC and DEST is aligned and count large enough, then copy words.  */
130   if (!UNALIGNED (src, dst) && !TOO_SMALL (count))
137       while (count >= sizeof (long int) && !DETECTNULL(*aligned_src))
139 	  count -= sizeof (long int);
147   while (count > 0)
149       --count;
154   while (count-- > 0)