1//===-- Starting point for 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_core/scanf_main.h"
10
11#include "src/__support/arg_list.h"
12#include "src/stdio/scanf_core/converter.h"
13#include "src/stdio/scanf_core/core_structs.h"
14#include "src/stdio/scanf_core/parser.h"
15#include "src/stdio/scanf_core/reader.h"
16
17#include <stddef.h>
18
19namespace LIBC_NAMESPACE {
20namespace scanf_core {
21
22int scanf_main(Reader *reader, const char *__restrict str,
23 internal::ArgList &args) {
24 Parser<internal::ArgList> parser(str, args);
25 int ret_val = READ_OK;
26 int conversions = 0;
27 for (FormatSection cur_section = parser.get_next_section();
28 !cur_section.raw_string.empty() && ret_val == READ_OK;
29 cur_section = parser.get_next_section()) {
30 if (cur_section.has_conv) {
31 ret_val = convert(reader, to_conv: cur_section);
32 // The %n (current position) conversion doesn't increment the number of
33 // assignments.
34 if (cur_section.conv_name != 'n')
35 conversions += ret_val == READ_OK ? 1 : 0;
36 } else {
37 ret_val = raw_match(reader, raw_string: cur_section.raw_string);
38 }
39 }
40
41 return conversions;
42}
43
44} // namespace scanf_core
45} // namespace LIBC_NAMESPACE
46

source code of libc/src/stdio/scanf_core/scanf_main.cpp