libc/src/stdlib/atoi.cpp

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