1 /* vi: set sw=4 ts=4: */
2 /*
3 * Utility routines.
4 *
5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
6 *
7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
8 */
9 #include "libbb.h"
10
11 /* Like strncpy but make sure the resulting string is always 0 terminated. */
safe_strncpy(char * dst,const char * src,size_t size)12 char* FAST_FUNC safe_strncpy(char *dst, const char *src, size_t size)
13 {
14 if (!size) return dst;
15 dst[--size] = '\0';
16 return strncpy(dst, src, size);
17 }
18
19 /* Like strcpy but can copy overlapping strings. */
overlapping_strcpy(char * dst,const char * src)20 void FAST_FUNC overlapping_strcpy(char *dst, const char *src)
21 {
22 /* Cheap optimization for dst == src case -
23 * better to have it here than in many callers.
24 */
25 if (dst != src) {
26 while ((*dst = *src) != '\0') {
27 dst++;
28 src++;
29 }
30 }
31 }
32