blob: 5eb0db0bd4c5732e47e94eadd94d0fa403525b33
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 | |
10 | #include "libbb.h" |
11 | |
12 | /* Like strncpy but make sure the resulting string is always 0 terminated. */ |
13 | char* FAST_FUNC safe_strncpy(char *dst, const char *src, size_t size) |
14 | { |
15 | if (!size) return dst; |
16 | dst[--size] = '\0'; |
17 | return strncpy(dst, src, size); |
18 | } |
19 | |
20 | /* Like strcpy but can copy overlapping strings. */ |
21 | void FAST_FUNC overlapping_strcpy(char *dst, const char *src) |
22 | { |
23 | /* Cheap optimization for dst == src case - |
24 | * better to have it here than in many callers. |
25 | */ |
26 | if (dst != src) { |
27 | while ((*dst = *src) != '\0') { |
28 | dst++; |
29 | src++; |
30 | } |
31 | } |
32 | } |
33 |