src/compat/strnlen.cpp

   1 // Copyright (c) 2009-2017 The Bitcoin Core developers
   2 // Distributed under the MIT software license, see the accompanying
   3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   4
   5 #if defined(HAVE_CONFIG_H)
   6 #include <config/bitcoin-config.h>
   7 #endif
   8
   9 #include <cstring>
  10
  11 #if HAVE_DECL_STRNLEN == 0
  12 size_t strnlen( const char *start, size_t max_len)
  13 {
  14     const char *end = (const char *)memchr(start, '\0', max_len);
  15
  16     return end ? (size_t)(end - start) : max_len;
  17 }
  18 #endif // HAVE_DECL_STRNLEN