| 1 | //===-- Implementation of strncpy -----------------------------------------===// |
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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/string/strncpy.h" |
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| 10 | |
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| 11 | #include "src/__support/common.h" |
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| 12 | #include <stddef.h> // For size_t. |
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| 13 | |
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| 14 | namespace LIBC_NAMESPACE { |
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| 15 | |
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| 16 | LLVM_LIBC_FUNCTION(char *, strncpy, |
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| 17 | (char *__restrict dest, const char *__restrict src, |
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| 18 | size_t n)) { |
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| 19 | size_t i = 0; |
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| 20 | // Copy up until \0 is found. |
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| 21 | for (; i < n && src[i] != '\0'; ++i) |
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| 22 | dest[i] = src[i]; |
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| 23 | // When n>strlen(src), n-strlen(src) \0 are appended. |
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| 24 | for (; i < n; ++i) |
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| 25 | dest[i] = '\0'; |
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| 26 | return dest; |
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| 27 | } |
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| 28 | |
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| 29 | } // namespace LIBC_NAMESPACE |
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| 30 | |
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