1 //===-- Implementation of ctime 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.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, (const time_t *t_ptr)) { 20 if (t_ptr == nullptr || *t_ptr > cpp::numeric_limits<int32_t>::max()) { 21 return nullptr; 22 } 23 static char buffer[TimeConstants::ASCTIME_BUFFER_SIZE]; 24 return time_utils::asctime(time_utils::localtime(t_ptr), buffer, 25 TimeConstants::ASCTIME_MAX_BYTES); 26 } 27 28 } // namespace LIBC_NAMESPACE_DECL 29