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//===-- Starting point for scanf --------------------------------*- 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/scanf_core/scanf_main.h"
#include "src/__support/arg_list.h"
#include "src/stdio/scanf_core/converter.h"
#include "src/stdio/scanf_core/core_structs.h"
#include "src/stdio/scanf_core/parser.h"
#include "src/stdio/scanf_core/reader.h"
#include <stddef.h>
namespace __llvm_libc {
namespace scanf_core {
int scanf_main(Reader *reader, const char *__restrict str,
internal::ArgList &args) {
Parser parser(str, args);
int ret_val = READ_OK;
int conversions = 0;
for (FormatSection cur_section = parser.get_next_section();
!cur_section.raw_string.empty() && ret_val == READ_OK;
cur_section = parser.get_next_section()) {
if (cur_section.has_conv) {
ret_val = convert(reader, cur_section);
// The %n (current position) conversion doesn't increment the number of
// assignments.
if (cur_section.conv_name != 'n')
conversions += ret_val == READ_OK ? 1 : 0;
} else {
ret_val = raw_match(reader, cur_section.raw_string);
}
}
if (conversions == 0 && reader->has_error()) {
// This is intended to be converted to EOF in the client call to avoid
// including stdio.h in this internal file.
return -1;
}
return conversions;
}
} // namespace scanf_core
} // namespace __llvm_libc
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