| David 'Digit' Turner | 3527fd6 | 2010-06-14 17:18:35 -0700 | [diff] [blame] | 1 | /*- |
| 2 | * Copyright (c) 1990, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * This code is derived from software contributed to Berkeley by |
| 6 | * Chris Torek. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 4. Neither the name of the University nor the names of its contributors |
| 17 | * may be used to endorse or promote products derived from this software |
| 18 | * without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 30 | * SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | #if 0 |
| 34 | #if defined(LIBC_SCCS) && !defined(lint) |
| 35 | static char sccsid[] = "@(#)strncpy.c 8.1 (Berkeley) 6/4/93"; |
| 36 | #endif /* LIBC_SCCS and not lint */ |
| 37 | #endif |
| 38 | #include <sys/cdefs.h> |
| 39 | __FBSDID("$FreeBSD$"); |
| 40 | |
| 41 | #include <wchar.h> |
| 42 | |
| 43 | /* |
| 44 | * Copy src to dst, truncating or null-padding to always copy n bytes. |
| 45 | * Return dst. |
| 46 | */ |
| 47 | wchar_t * |
| 48 | wcsncpy(wchar_t * __restrict dst, const wchar_t * __restrict src, size_t n) |
| 49 | { |
| 50 | if (n != 0) { |
| 51 | wchar_t *d = dst; |
| 52 | const wchar_t *s = src; |
| 53 | |
| 54 | do { |
| 55 | if ((*d++ = *s++) == L'\0') { |
| 56 | /* NUL pad the remaining n-1 bytes */ |
| 57 | while (--n != 0) |
| 58 | *d++ = L'\0'; |
| 59 | break; |
| 60 | } |
| 61 | } while (--n != 0); |
| 62 | } |
| 63 | return (dst); |
| 64 | } |