| 1 | //===-- Implementation of wctomb ------------------------------------------===// |
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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/wctomb.h" |
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| 10 | |
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| 11 | #include "hdr/types/wchar_t.h" |
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| 12 | #include "src/__support/common.h" |
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| 13 | #include "src/__support/libc_errno.h" |
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| 14 | #include "src/__support/macros/config.h" |
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| 15 | #include "src/__support/wchar/mbstate.h" |
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| 16 | #include "src/__support/wchar/wcrtomb.h" |
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| 17 | |
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| 18 | namespace LIBC_NAMESPACE_DECL { |
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| 19 | |
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| 20 | LLVM_LIBC_FUNCTION(int, wctomb, (char *s, wchar_t wc)) { |
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| 21 | static internal::mbstate internal_mbstate; |
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| 22 | if (s == nullptr) |
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| 23 | return 0; |
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| 24 | |
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| 25 | auto result = internal::wcrtomb(s, wc, &internal_mbstate); |
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| 26 | |
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| 27 | if (!result.has_value()) { // invalid wide character |
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| 28 | libc_errno = EILSEQ; |
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| 29 | return -1; |
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| 30 | } |
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| 31 | |
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| 32 | return static_cast<int>(result.value()); |
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| 33 | } |
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| 34 | |
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| 35 | } // namespace LIBC_NAMESPACE_DECL |
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| 36 | |
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