| 1 | //===-- Implementation of wcsncpy -----------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "src/wchar/wcsncpy.h" |
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| 10 | |
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| 11 | #include "hdr/types/size_t.h" |
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| 12 | #include "hdr/types/wchar_t.h" |
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| 13 | #include "src/__support/common.h" |
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| 14 | #include "src/__support/macros/config.h" |
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| 15 | |
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| 16 | namespace LIBC_NAMESPACE_DECL { |
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| 17 | |
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| 18 | LLVM_LIBC_FUNCTION(wchar_t *, wcsncpy, |
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| 19 | (wchar_t *__restrict s1, const wchar_t *__restrict s2, |
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| 20 | size_t n)) { |
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| 21 | size_t i = 0; |
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| 22 | // Copy up until \0 is found. |
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| 23 | for (; i < n && s2[i] != L'\0'; ++i) |
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| 24 | s1[i] = s2[i]; |
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| 25 | // When s2 is shorter than n, append \0. |
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| 26 | for (; i < n; ++i) |
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| 27 | s1[i] = L'\0'; |
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| 28 | return s1; |
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| 29 | } |
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| 30 | |
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| 31 | } // namespace LIBC_NAMESPACE_DECL |
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| 32 | |
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