1 //===-- Implementation of stpcpy ------------------------------------------===// 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/string/stpcpy.h" 10 #include "src/__support/macros/config.h" 11 #include "src/string/mempcpy.h" 12 #include "src/string/string_utils.h" 13 14 #include "src/__support/common.h" 15 16 namespace LIBC_NAMESPACE_DECL { 17 18 LLVM_LIBC_FUNCTION(char *, stpcpy, 19 (char *__restrict dest, const char *__restrict src)) { 20 size_t size = internal::string_length(src) + 1; 21 char *result = 22 reinterpret_cast<char *>(LIBC_NAMESPACE::mempcpy(dest, src, size)); 23 24 if (result != nullptr) 25 return result - 1; 26 return nullptr; 27 } 28 29 } // namespace LIBC_NAMESPACE_DECL 30