1//===-- Implementation of atoi --------------------------------------------===//
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/stdlib/atoi.h"
10#include "src/__support/common.h"
11#include "src/__support/macros/config.h"
12#include "src/__support/str_to_integer.h"
13#include "src/errno/libc_errno.h"
14
15namespace LIBC_NAMESPACE_DECL {
16
17LLVM_LIBC_FUNCTION(int, atoi, (const char *str)) {
18 // This is done because the standard specifies that atoi is identical to
19 // (int)(strtol).
20 auto result = internal::strtointeger<long>(src: str, base: 10);
21 if (result.has_error())
22 libc_errno = result.error;
23
24 return static_cast<int>(result);
25}
26
27} // namespace LIBC_NAMESPACE_DECL
28