diff options
Diffstat (limited to 'na/lib/string/memmove.c')
| -rw-r--r-- | na/lib/string/memmove.c | 45 |
1 files changed, 0 insertions, 45 deletions
diff --git a/na/lib/string/memmove.c b/na/lib/string/memmove.c deleted file mode 100644 index 56e1a81..0000000 --- a/na/lib/string/memmove.c +++ /dev/null @@ -1,45 +0,0 @@ -/* SPDX-License-Identifier: MIT */ -/* Derived from musl libc (Copyright © 2005-2020 Rich Felker, et al.) */ - -#include <string.h> -#include <stdint.h> - -#ifdef __GNUC__ -typedef __attribute__((__may_alias__)) size_t WT; -#define WS (sizeof(WT)) -#endif - -void *memmove(void *dest, const void *src, size_t n) -{ - char *d = dest; - const char *s = src; - - if (d==s) return d; - if ((uintptr_t)s-(uintptr_t)d-n <= -2*n) return memcpy(d, s, n); - - if (d<s) { -#ifdef __GNUC__ - if ((uintptr_t)s % WS == (uintptr_t)d % WS) { - while ((uintptr_t)d % WS) { - if (!n--) return dest; - *d++ = *s++; - } - for (; n>=WS; n-=WS, d+=WS, s+=WS) *(WT *)d = *(WT *)s; - } -#endif - for (; n; n--) *d++ = *s++; - } else { -#ifdef __GNUC__ - if ((uintptr_t)s % WS == (uintptr_t)d % WS) { - while ((uintptr_t)(d+n) % WS) { - if (!n--) return dest; - d[n] = s[n]; - } - while (n>=WS) n-=WS, *(WT *)(d+n) = *(WT *)(s+n); - } -#endif - while (n) n--, d[n] = s[n]; - } - - return dest; -} |
