| 1 | //===-- Baremetal implementation of getchar -------------------------------===// |
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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/stdio/getchar.h" |
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| 10 | #include "src/__support/OSUtil/io.h" |
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| 11 | #include "src/__support/macros/config.h" |
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| 12 | |
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| 13 | #include "hdr/stdio_macros.h" // for EOF. |
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| 14 | |
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| 15 | namespace LIBC_NAMESPACE_DECL { |
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| 16 | |
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| 17 | LLVM_LIBC_FUNCTION(int, getchar, ()) { |
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| 18 | char buf[1]; |
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| 19 | auto result = read_from_stdin(buf, sizeof(buf)); |
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| 20 | if (result <= 0) |
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| 21 | return EOF; |
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| 22 | return buf[0]; |
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| 23 | } |
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| 24 | |
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| 25 | } // namespace LIBC_NAMESPACE_DECL |
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| 26 | |
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