1//===-- Implementation of vsscanf -------------------------------*- 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/vsscanf.h"
10
11#include "hdr/stdio_macros.h"
12#include "src/__support/CPP/limits.h"
13#include "src/__support/arg_list.h"
14#include "src/stdio/scanf_core/scanf_main.h"
15#include "src/stdio/scanf_core/string_reader.h"
16
17#include <stdarg.h>
18
19namespace LIBC_NAMESPACE_DECL {
20
21LLVM_LIBC_FUNCTION(int, vsscanf,
22 (const char *buffer, const char *format, va_list vlist)) {
23 internal::ArgList args(vlist);
24 scanf_core::StringReader reader(buffer, cpp::numeric_limits<size_t>::max());
25 int ret_val = scanf_core::scanf_main(&reader, format, args);
26 // This is done to avoid including stdio.h in the internals. On most systems
27 // EOF is -1, so this will be transformed into just "return ret_val".
28 return (ret_val == -1) ? EOF : ret_val;
29}
30
31} // namespace LIBC_NAMESPACE_DECL
32

source code of libc/src/stdio/vsscanf.cpp