| 1 | /* Copyright (C) 1995-2022 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | #include <wchar.h> |
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| 19 | #include <loop_unroll.h> |
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| 20 | |
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| 21 | |
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| 22 | #ifdef WCSCPY |
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| 23 | # define __wcscpy WCSCPY |
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| 24 | #endif |
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| 25 | |
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| 26 | /* Copy SRC to DEST. */ |
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| 27 | wchar_t * |
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| 28 | __wcscpy (wchar_t *dest, const wchar_t *src) |
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| 29 | { |
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| 30 | #ifndef UNROLL_NTIMES |
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| 31 | return __wmemcpy (s1: dest, s2: src, n: __wcslen (s: src) + 1); |
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| 32 | #else |
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| 33 | /* Some architectures might have costly tail function call (powerpc |
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| 34 | for instance) where wmemcpy call overhead for smalls sizes might |
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| 35 | be more costly than just unrolling the main loop. */ |
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| 36 | wchar_t *wcp = dest; |
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| 37 | |
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| 38 | #define ITERATION(index) \ |
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| 39 | ({ \ |
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| 40 | wchar_t c = *src++; \ |
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| 41 | *wcp++ = c; \ |
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| 42 | c != L'\0'; \ |
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| 43 | }) |
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| 44 | |
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| 45 | while (1) |
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| 46 | UNROLL_REPEAT(UNROLL_NTIMES, ITERATION); |
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| 47 | return dest; |
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| 48 | #endif |
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| 49 | } |
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| 50 | #ifndef WCSCPY |
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| 51 | weak_alias (__wcscpy, wcscpy) |
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| 52 | libc_hidden_def (__wcscpy) |
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| 53 | #endif |
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| 54 | |
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