| 1 | //===-- Implementation of scanf ---------------------------------*- C++ -*-===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #include "src/stdio/scanf.h" |
| 10 | |
| 11 | #include "hdr/stdio_macros.h" |
| 12 | #include "src/__support/OSUtil/io.h" |
| 13 | #include "src/__support/arg_list.h" |
| 14 | #include "src/__support/macros/config.h" |
| 15 | #include "src/stdio/baremetal/scanf_internal.h" |
| 16 | #include "src/stdio/scanf_core/scanf_main.h" |
| 17 | |
| 18 | #include <stdarg.h> |
| 19 | |
| 20 | namespace LIBC_NAMESPACE_DECL { |
| 21 | |
| 22 | LLVM_LIBC_FUNCTION(int, scanf, (const char *__restrict format, ...)) { |
| 23 | va_list vlist; |
| 24 | va_start(vlist, format); |
| 25 | internal::ArgList args(vlist); // This holder class allows for easier copying |
| 26 | // and pointer semantics, as well as handling |
| 27 | // destruction automatically. |
| 28 | va_end(vlist); |
| 29 | |
| 30 | scanf_core::StdinReader reader; |
| 31 | int retval = scanf_core::scanf_main(&reader, format, args); |
| 32 | // This is done to avoid including stdio.h in the internals. On most systems |
| 33 | // EOF is -1, so this will be transformed into just "return retval". |
| 34 | return (retval == -1) ? EOF : retval; |
| 35 | } |
| 36 | |
| 37 | } // namespace LIBC_NAMESPACE_DECL |
| 38 |