macros.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 
 
#ifndef INCLUDED_SAL_MACROS_H
#define INCLUDED_SAL_MACROS_H
 
#include <stddef.h>
 
#ifndef SAL_N_ELEMENTS
#    if defined(__cplusplus) && ( defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L )
        /*
         * Magic template to calculate at compile time the number of elements
         * in an array. Enforcing that the argument must be an array and not
         * a pointer, e.g.
         *  char *pFoo="foo";
         *  SAL_N_ELEMENTS(pFoo);
         * fails while
         *  SAL_N_ELEMENTS("foo");
         * or
         *  char aFoo[]="foo";
         *  SAL_N_ELEMENTS(aFoo);
         * pass
         *
         * Unfortunately if arr is an array of an anonymous class then we need
         * C++0x, i.e. see
         * http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#757
         */
         template <typename T, size_t S> char (&sal_n_array_size( T(&)[S] ))[S];
#        define SAL_N_ELEMENTS(arr)     (sizeof(sal_n_array_size(arr)))
#    else
#        define SAL_N_ELEMENTS(arr)     (sizeof (arr) / sizeof ((arr)[0]))
#    endif
#endif
 
#ifndef SAL_STRINGIFY
#   define SAL_STRINGIFY_ARG(x) #x
#   define SAL_STRINGIFY(x) SAL_STRINGIFY_ARG(x)
#endif
 
#endif
 
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