src/strnlen.h

   1 ///
   2 /// \file       strnlen.h
   3 ///             Header for strnlen() call, for systems that don't have GNU.
   4 ///
   5
   6 /*
   7     Copyright (C) 2007, Net Direct Inc. (http://www.netdirect.ca/)
   8
   9     This program is free software; you can redistribute it and/or modify
  10     it under the terms of the GNU General Public License as published by
  11     the Free Software Foundation; either version 2 of the License, or
  12     (at your option) any later version.
  13
  14     This program is distributed in the hope that it will be useful,
  15     but WITHOUT ANY WARRANTY; without even the implied warranty of
  16     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  17
  18     See the GNU General Public License in the COPYING file at the
  19     root directory of this project for more details.
  20 */
  21
  22 #ifndef __BARRY_STRNLEN_H__
  23 #define __BARRY_STRNLEN_H__
  24
  25 #include "config.h"
  26 #include <string.h>
  27
  28 // this is always defined by configure, if not, then the autoconf
  29 // sources changed (likely in /usr/share/autoconf/autoconf/functions.m4)
  30 // and configure.ac is no longer accurate
  31 #ifndef HAVE_WORKING_STRNLEN
  32 #error Configure.ac is not accurate. Read comments in strnlen.h.
  33 #endif
  34
  35 // now, if defined and set to 0, then strnlen() either does not exist at all,
  36 // or is broken (on AIX)
  37 #if !HAVE_WORKING_STRNLEN
  38
  39 // so define our own version...
  40 #ifdef __cplusplus
  41 extern "C" {
  42 #endif
  43
  44 size_t barry_strnlen(const char *s, size_t maxlen);
  45
  46 #ifdef __cplusplus
  47 }
  48 #endif
  49
  50 // and override the system's name so we call our own
  51 #define strnlen(s,l) barry_strnlen(s,l)
  52
  53 #endif  // !HAVE_WORKING_STRNLEN
  54
  55 #endif  // __BARRY_STRNLEN_H__
  56