1 //===-- Implementation of ctime_r 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 "ctime_r.h" 10 #include "src/__support/CPP/limits.h" 11 #include "src/__support/common.h" 12 #include "src/__support/macros/config.h" 13 #include "time_utils.h" 14 15 namespace LIBC_NAMESPACE_DECL { 16 17 using LIBC_NAMESPACE::time_utils::TimeConstants; 18 19 LLVM_LIBC_FUNCTION(char *, ctime_r, (const time_t *t_ptr, char *buffer)) { 20 if (t_ptr == nullptr || buffer == nullptr || 21 *t_ptr > cpp::numeric_limits<int32_t>::max()) { 22 return nullptr; 23 } 24 25 return time_utils::asctime(time_utils::localtime(t_ptr), buffer, 26 TimeConstants::ASCTIME_MAX_BYTES); 27 } 28 29 } // namespace LIBC_NAMESPACE_DECL 30