/* _GL_ARG_NONNULL((n,...,m)) tells the compiler and static analyzer tools
that the values passed as arguments n, ..., m must be non-NULL pointers.
n = 1 stands for the first argument, n = 2 for the second argument etc. */
#ifndef _GL_ARG_NONNULL
# if (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) || __GNUC__ > 3
# define _GL_ARG_NONNULL(params) __attribute__ ((__nonnull__ params))
# else
# define _GL_ARG_NONNULL(params)
# endif
#endif