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//===-- Implementation of fscanf --------------------------------*- C++ -*-===//
//
// 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/stdio/fscanf.h"
#include "src/__support/File/file.h"
#include "src/__support/arg_list.h"
#include "src/__support/macros/config.h"
#include "src/stdio/scanf_core/vfscanf_internal.h"
#include "hdr/types/FILE.h"
#include <stdarg.h>
namespace LIBC_NAMESPACE_DECL {
LLVM_LIBC_FUNCTION(int, fscanf,
(::FILE *__restrict stream, 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.
va_end(vlist);
int ret_val = scanf_core::vfscanf_internal(stream, 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 LIBC_NAMESPACE_DECL
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