/*
 * These are types: corresponding to the smallest unsigned/signed
 * integer type no smaller than int or long, respectively, capable of
 * holding the argument (which can be anything that can be validly
 * passed to sizeof().)
 *
 * If the size is too large even for a long long, they return an
 * unnamed structure type with the right sizeof(), which if used for a
 * cast will generate the error message:
 *
 * error: conversion to non-scalar type requested
 */
#define __uinttype(x)							\
  __typeof__(__builtin_choose_expr(sizeof(x) <= sizeof(0U), 0U,		\
             __builtin_choose_expr(sizeof(x) <= sizeof(0UL), 0UL,	\
	     __builtin_choose_expr(sizeof(x) <= sizeof(0ULL), 0ULL,	\
	     ({ struct { unsigned char __bad[sizeof(x)]; } __bad = {{0}}; \
	        __bad; })))))
#define __sinttype(x)							\
  __typeof__(__builtin_choose_expr(sizeof(x) <= sizeof(0), 0,		\
             __builtin_choose_expr(sizeof(x) <= sizeof(0L), 0L,		\
	     __builtin_choose_expr(sizeof(x) <= sizeof(0LL), 0LL,	\
	     ({ struct { signed char __bad[sizeof(x)]; } __bad = {{0}}; \
	        __bad; })))))
#define __ulongtype(x)							\
  __typeof__(__builtin_choose_expr(sizeof(x) <= sizeof(0UL), 0UL,	\
	     __builtin_choose_expr(sizeof(x) <= sizeof(0ULL), 0ULL,	\
	     ({ struct { unsigned char __bad[sizeof(x)]; } __bad = {{0}}; \
	        __bad; }))))
#define __slongtype(x)							\
  __typeof__(__builtin_choose_expr(sizeof(x) <= sizeof(0L), 0L,		\
	     __builtin_choose_expr(sizeof(x) <= sizeof(0LL), 0LL,	\
	     ({ struct { signed char __bad[sizeof(x)]; } __bad = {{0}}; \
	        __bad; })))))