1 /* Copyright (C) 1995-2022 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <https://www.gnu.org/licenses/>. */ 17 18 #include <stddef.h> 19 #include <wchar.h> 20 21 22 /* Copy SRC to DEST. */ 23 wchar_t * __wcscpy_chk(wchar_t * dest,const wchar_t * src,size_t n)24__wcscpy_chk (wchar_t *dest, const wchar_t *src, size_t n) 25 { 26 wint_t c; 27 wchar_t *wcp; 28 29 if (__alignof__ (wchar_t) >= sizeof (wchar_t)) 30 { 31 const ptrdiff_t off = dest - src - 1; 32 33 wcp = (wchar_t *) src; 34 35 do 36 { 37 if (__glibc_unlikely (n-- == 0)) 38 __chk_fail (); 39 c = *wcp++; 40 wcp[off] = c; 41 } 42 while (c != L'\0'); 43 } 44 else 45 { 46 wcp = dest; 47 48 do 49 { 50 if (__glibc_unlikely (n-- == 0)) 51 __chk_fail (); 52 c = *src++; 53 *wcp++ = c; 54 } 55 while (c != L'\0'); 56 } 57 58 return dest; 59 } 60