b6bc9d72f6
This is step 4 of https://discourse.llvm.org/t/rfc-customizable-namespace-to-allow-testing-the-libc-when-the-system-libc-is-also-llvms-libc/73079
29 lines
1004 B
C++
29 lines
1004 B
C++
//===-- Implementation of strncat -----------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "src/string/strncat.h"
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#include "src/string/string_utils.h"
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#include "src/string/strncpy.h"
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#include "src/__support/common.h"
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namespace LIBC_NAMESPACE {
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LLVM_LIBC_FUNCTION(char *, strncat,
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(char *__restrict dest, const char *__restrict src,
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size_t count)) {
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size_t src_length = internal::string_length(src);
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size_t copy_amount = src_length > count ? count : src_length;
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size_t dest_length = internal::string_length(dest);
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LIBC_NAMESPACE::strncpy(dest + dest_length, src, copy_amount);
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dest[dest_length + copy_amount] = '\0';
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return dest;
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}
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} // namespace LIBC_NAMESPACE
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