1 //===-- Implementation of nan function ------------------------------------===// 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/math/nan.h" 10 #include "src/__support/common.h" 11 #include "src/__support/str_to_float.h" 12 #include "src/errno/libc_errno.h" 13 14 namespace LIBC_NAMESPACE { 15 16 LLVM_LIBC_FUNCTION(double, nan, (const char *arg)) { 17 auto result = internal::strtonan<double>(arg); 18 if (result.has_error()) 19 libc_errno = result.error; 20 return result.value; 21 } 22 23 } // namespace LIBC_NAMESPACE 24