| 1 | //===-- Implementation of wmemcmp -----------------------------------------===// |
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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/wmemcmp.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 | #include "src/__support/macros/null_check.h" // LIBC_CRASH_ON_NULLPTR |
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| 16 | |
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| 17 | namespace LIBC_NAMESPACE_DECL { |
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| 18 | |
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| 19 | LLVM_LIBC_FUNCTION(int, wmemcmp, |
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| 20 | (const wchar_t *s1, const wchar_t *s2, size_t n)) { |
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| 21 | LIBC_CRASH_ON_NULLPTR(s1); |
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| 22 | LIBC_CRASH_ON_NULLPTR(s2); |
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| 23 | for (size_t i = 0; i < n; ++i) { |
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| 24 | if (s1[i] != s2[i]) |
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| 25 | return (int)(s1[i] - s2[i]); |
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| 26 | } |
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| 27 | // If it reaches the end, all n values must be the same. |
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| 28 | return 0; |
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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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