libc/src/string/stpcpy.cpp

   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