| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 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 | } |