| 1 | //===-- Implementation of strcat ------------------------------------------===// |
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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/strcat.h" |
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| 10 | #include "src/__support/macros/config.h" |
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| 11 | #include "src/__support/macros/null_check.h" |
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| 12 | #include "src/string/strcpy.h" |
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| 13 | #include "src/string/string_utils.h" |
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| 14 | |
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| 15 | #include "src/__support/common.h" |
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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(char *, strcat, |
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| 20 | (char *__restrict dest, const char *__restrict src)) { |
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| 21 | LIBC_CRASH_ON_NULLPTR(dest); |
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| 22 | LIBC_CRASH_ON_NULLPTR(src); |
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| 23 | size_t dest_length = internal::string_length(dest); |
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| 24 | size_t src_length = internal::string_length(src); |
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| 25 | LIBC_NAMESPACE::strcpy(dest + dest_length, src); |
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| 26 | dest[dest_length + src_length] = '\0'; |
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| 27 | return dest; |
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| 28 | } |
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| 29 | |
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| 30 | } // namespace LIBC_NAMESPACE_DECL |
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| 31 | |
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