| //===-- Implementation of wctob -------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "src/wchar/wctob.h" |
| #include "src/__support/common.h" |
| #include "src/__support/macros/config.h" |
| |
| #include "hdr/stdio_macros.h" // for EOF. |
| #include "hdr/types/wint_t.h" |
| |
| namespace LIBC_NAMESPACE_DECL { |
| |
| LLVM_LIBC_FUNCTION(int, wctob, (wint_t c)) { |
| // The standard states that wint_t may either be an alias of wchar_t or |
| // an alias of an integer type, different platforms define this type with |
| // different signedness. This is equivalent to `(c > 127) || (c < 0)` but also |
| // works without -Wtype-limits warnings when `wint_t` is unsigned. |
| if ((c & ~127) != 0) |
| return EOF; |
| return static_cast<int>(c); |
| } |
| |
| } // namespace LIBC_NAMESPACE_DECL |
