| 1 | //===-- Implementation of swab --------------------------------------------===// |
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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/unistd/swab.h" |
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| 10 | |
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| 11 | #include "src/__support/common.h" |
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| 12 | |
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| 13 | namespace LIBC_NAMESPACE { |
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| 14 | |
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| 15 | LLVM_LIBC_FUNCTION(void, swab, |
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| 16 | (const void *__restrict from, void *__restrict to, |
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| 17 | ssize_t n)) { |
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| 18 | const unsigned char *f = static_cast<const unsigned char *>(from); |
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| 19 | unsigned char *t = static_cast<unsigned char *>(to); |
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| 20 | for (ssize_t i = 1; i < n; i += 2) { |
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| 21 | t[i - 1] = f[i]; |
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| 22 | t[i] = f[i - 1]; |
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| 23 | } |
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| 24 | } |
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| 25 | |
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| 26 | } // namespace LIBC_NAMESPACE |
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| 27 | |
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