libc/src/string/strcat.cpp

   1 //===-- Implementation of strcat ------------------------------------------===//
   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/strcat.h"
  10 #include "src/string/strcpy.h"
  11 #include "src/string/string_utils.h"
  12
  13 #include "src/__support/common.h"
  14
  15 namespace __llvm_libc {
  16
  17 LLVM_LIBC_FUNCTION(char *, strcat,
  18                    (char *__restrict dest, const char *__restrict src)) {
  19   size_t dest_length = internal::string_length(dest);
  20   size_t src_length = internal::string_length(src);
  21   __llvm_libc::strcpy(dest + dest_length, src);
  22   dest[dest_length + src_length] = '\0';
  23   return dest;
  24 }
  25
  26 } // namespace __llvm_libc