blob: 60e77895edcc3c60510bcb067eccc4cf3bc1c70e [file] [log] [blame]
//===-- Implementation of scanf ---------------------------------*- C++ -*-===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#include "src/stdio/scanf.h"
#include "src/__support/File/file.h"
#include "src/__support/arg_list.h"
#include "src/stdio/scanf_core/vfscanf_internal.h"
#include <stdarg.h>
#include <stdio.h>
namespace __llvm_libc {
LLVM_LIBC_FUNCTION(int, scanf, (const char *__restrict format, ...)) {
va_list vlist;
va_start(vlist, format);
internal::ArgList args(vlist); // This holder class allows for easier copying
// and pointer semantics, as well as handling
// destruction automatically.
int ret_val = scanf_core::vfscanf_internal(
reinterpret_cast<::FILE *>(__llvm_libc::stdin), format, args);
// This is done to avoid including stdio.h in the internals. On most systems
// EOF is -1, so this will be transformed into just "return ret_val".
return (ret_val == -1) ? EOF : ret_val;
} // namespace __llvm_libc