diff options
Diffstat (limited to 'lib/string/stpncpy.c')
| -rw-r--r-- | lib/string/stpncpy.c | 35 |
1 files changed, 0 insertions, 35 deletions
diff --git a/lib/string/stpncpy.c b/lib/string/stpncpy.c deleted file mode 100644 index ca2ef78..0000000 --- a/lib/string/stpncpy.c +++ /dev/null @@ -1,35 +0,0 @@ -/* SPDX-License-Identifier: MIT */ -/* Derived from musl libc (Copyright © 2005-2020 Rich Felker, et al.) */ - -#include <string.h> -#include <stdint.h> -#include <limits.h> - -#define ALIGN (sizeof(size_t)-1) -#define ONES ((size_t)-1/UCHAR_MAX) -#define HIGHS (ONES * (UCHAR_MAX/2+1)) -#define HASZERO(x) ((x)-ONES & ~(x) & HIGHS) - -char *__stpncpy(char *restrict d, const char *restrict s, size_t n) -{ -#ifdef __GNUC__ - typedef size_t __attribute__((__may_alias__)) word; - word *wd; - const word *ws; - if (((uintptr_t)s & ALIGN) == ((uintptr_t)d & ALIGN)) { - for (; ((uintptr_t)s & ALIGN) && n && (*d=*s); n--, s++, d++); - if (!n || !*s) goto tail; - wd=(void *)d; ws=(const void *)s; - for (; n>=sizeof(size_t) && !HASZERO(*ws); - n-=sizeof(size_t), ws++, wd++) *wd = *ws; - d=(void *)wd; s=(const void *)ws; - } -#endif - for (; n && (*d=*s); n--, s++, d++); -tail: - memset(d, 0, n); - return d; -} - -weak_alias(__stpncpy, stpncpy); - |
