compat/xstrerror.h

   1 /*
   2  * Copyright (C) 1996-2015 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 #ifndef _SQUID_COMPAT_XSTRERROR_H
  10 #define _SQUID_COMPAT_XSTRERROR_H
  11
  12 #if HAVE_ERRNO_H
  13 #include <errno.h>
  14 #endif
  15
  16 /** strerror() wrapper replacement.
  17  *
  18  * Provides the guarantee that a string is always returned.
  19  * Where strerror() would have provided NULL this will report the error as unknown.
  20  */
  21 #define xstrerror() xstrerr(errno)
  22
  23 /** Provide the textual display of a system error number.
  24  * A string is always returned.
  25  * On MS Windows the native Win32 errors are also translated.
  26  */
  27 extern const char * xstrerr(int error);
  28
  29 #endif /* _SQUID_COMPAT_XSTRERROR_H */
  30