1/* $NetBSD: cdefs.h,v 1.128 2015/11/19 17:04:01 christos Exp $ */
2
3/* * Copyright (c) 1991, 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * Berkeley Software Design, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)cdefs.h 8.8 (Berkeley) 1/9/95
34 */
35
36#ifndef _SYS_CDEFS_H_
37#define _SYS_CDEFS_H_
38
39#ifdef _KERNEL_OPT
40#include "opt_diagnostic.h"
41#endif
42
43/*
44 * Macro to test if we're using a GNU C compiler of a specific vintage
45 * or later, for e.g. features that appeared in a particular version
46 * of GNU C. Usage:
47 *
48 * #if __GNUC_PREREQ__(major, minor)
49 * ...cool feature...
50 * #else
51 * ...delete feature...
52 * #endif
53 */
54#ifdef __GNUC__
55#define __GNUC_PREREQ__(x, y) \
56 ((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) || \
57 (__GNUC__ > (x)))
58#else
59#define __GNUC_PREREQ__(x, y) 0
60#endif
61
62#include <machine/cdefs.h>
63#ifdef __ELF__
64#include <sys/cdefs_elf.h>
65#else
66#include <sys/cdefs_aout.h>
67#endif
68
69#ifdef __GNUC__
70#define __strict_weak_alias(alias,sym) \
71 __unused static __typeof__(alias) *__weak_alias_##alias = &sym; \
72 __weak_alias(alias,sym)
73#else
74#define __strict_weak_alias(alias,sym) __weak_alias(alias,sym)
75#endif
76
77/*
78 * Optional marker for size-optimised MD calling convention.
79 */
80#ifndef __compactcall
81#define __compactcall
82#endif
83
84/*
85 * The __CONCAT macro is used to concatenate parts of symbol names, e.g.
86 * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
87 * The __CONCAT macro is a bit tricky -- make sure you don't put spaces
88 * in between its arguments. __CONCAT can also concatenate double-quoted
89 * strings produced by the __STRING macro, but this only works with ANSI C.
90 */
91
92#define ___STRING(x) __STRING(x)
93#define ___CONCAT(x,y) __CONCAT(x,y)
94
95#if __STDC__ || defined(__cplusplus)
96#define __P(protos) protos /* full-blown ANSI C */
97#define __CONCAT(x,y) x ## y
98#define __STRING(x) #x
99
100#define __const const /* define reserved names to standard */
101#define __signed signed
102#define __volatile volatile
103#if defined(__cplusplus) || defined(__PCC__)
104#define __inline inline /* convert to C++/C99 keyword */
105#else
106#if !defined(__GNUC__) && !defined(__lint__)
107#define __inline /* delete GCC keyword */
108#endif /* !__GNUC__ && !__lint__ */
109#endif /* !__cplusplus */
110
111#else /* !(__STDC__ || __cplusplus) */
112#define __P(protos) () /* traditional C preprocessor */
113#define __CONCAT(x,y) x/**/y
114#define __STRING(x) "x"
115
116#ifndef __GNUC__
117#define __const /* delete pseudo-ANSI C keywords */
118#define __inline
119#define __signed
120#define __volatile
121#endif /* !__GNUC__ */
122
123/*
124 * In non-ANSI C environments, new programs will want ANSI-only C keywords
125 * deleted from the program and old programs will want them left alone.
126 * Programs using the ANSI C keywords const, inline etc. as normal
127 * identifiers should define -DNO_ANSI_KEYWORDS.
128 */
129#ifndef NO_ANSI_KEYWORDS
130#define const __const /* convert ANSI C keywords */
131#define inline __inline
132#define signed __signed
133#define volatile __volatile
134#endif /* !NO_ANSI_KEYWORDS */
135#endif /* !(__STDC__ || __cplusplus) */
136
137/*
138 * Used for internal auditing of the NetBSD source tree.
139 */
140#ifdef __AUDIT__
141#define __aconst __const
142#else
143#define __aconst
144#endif
145
146/*
147 * Compile Time Assertion.
148 */
149#ifdef __COUNTER__
150#define __CTASSERT(x) __CTASSERT0(x, __ctassert, __COUNTER__)
151#else
152#define __CTASSERT(x) __CTASSERT99(x, __INCLUDE_LEVEL__, __LINE__)
153#define __CTASSERT99(x, a, b) __CTASSERT0(x, __CONCAT(__ctassert,a), \
154 __CONCAT(_,b))
155#endif
156#define __CTASSERT0(x, y, z) __CTASSERT1(x, y, z)
157#define __CTASSERT1(x, y, z) typedef char y ## z[/*CONSTCOND*/(x) ? 1 : -1] __unused
158
159/*
160 * The following macro is used to remove const cast-away warnings
161 * from gcc -Wcast-qual; it should be used with caution because it
162 * can hide valid errors; in particular most valid uses are in
163 * situations where the API requires it, not to cast away string
164 * constants. We don't use *intptr_t on purpose here and we are
165 * explicit about unsigned long so that we don't have additional
166 * dependencies.
167 */
168#define __UNCONST(a) ((void *)(unsigned long)(const void *)(a))
169
170/*
171 * The following macro is used to remove the volatile cast-away warnings
172 * from gcc -Wcast-qual; as above it should be used with caution
173 * because it can hide valid errors or warnings. Valid uses include
174 * making it possible to pass a volatile pointer to memset().
175 * For the same reasons as above, we use unsigned long and not intptr_t.
176 */
177#define __UNVOLATILE(a) ((void *)(unsigned long)(volatile void *)(a))
178
179/*
180 * GCC2 provides __extension__ to suppress warnings for various GNU C
181 * language extensions under "-ansi -pedantic".
182 */
183#if !__GNUC_PREREQ__(2, 0)
184#define __extension__ /* delete __extension__ if non-gcc or gcc1 */
185#endif
186
187/*
188 * GCC1 and some versions of GCC2 declare dead (non-returning) and
189 * pure (no side effects) functions using "volatile" and "const";
190 * unfortunately, these then cause warnings under "-ansi -pedantic".
191 * GCC2 uses a new, peculiar __attribute__((attrs)) style. All of
192 * these work for GNU C++ (modulo a slight glitch in the C++ grammar
193 * in the distribution version of 2.5.5).
194 *
195 * GCC defines a pure function as depending only on its arguments and
196 * global variables. Typical examples are strlen and sqrt.
197 *
198 * GCC defines a const function as depending only on its arguments.
199 * Therefore calling a const function again with identical arguments
200 * will always produce the same result.
201 *
202 * Rounding modes for floating point operations are considered global
203 * variables and prevent sqrt from being a const function.
204 *
205 * Calls to const functions can be optimised away and moved around
206 * without limitations.
207 */
208#if !__GNUC_PREREQ__(2, 0)
209#define __attribute__(x)
210#endif
211
212#if __GNUC_PREREQ__(2, 5)
213#define __dead __attribute__((__noreturn__))
214#elif defined(__GNUC__)
215#define __dead __volatile
216#else
217#define __dead
218#endif
219
220#if __GNUC_PREREQ__(2, 96)
221#define __pure __attribute__((__pure__))
222#elif defined(__GNUC__)
223#define __pure __const
224#else
225#define __pure
226#endif
227
228#if __GNUC_PREREQ__(2, 5)
229#define __constfunc __attribute__((__const__))
230#else
231#define __constfunc
232#endif
233
234#if __GNUC_PREREQ__(3, 0)
235#define __noinline __attribute__((__noinline__))
236#else
237#define __noinline /* nothing */
238#endif
239
240#if __GNUC_PREREQ__(3, 0)
241#define __always_inline __attribute__((__always_inline__))
242#else
243#define __always_inline /* nothing */
244#endif
245
246#if __GNUC_PREREQ__(4, 1)
247#define __returns_twice __attribute__((__returns_twice__))
248#else
249#define __returns_twice /* nothing */
250#endif
251
252#if __GNUC_PREREQ__(4, 5)
253#define __noclone __attribute__((__noclone__))
254#else
255#define __noclone /* nothing */
256#endif
257
258/*
259 * __unused: Note that item or function might be unused.
260 */
261#if __GNUC_PREREQ__(2, 7)
262#define __unused __attribute__((__unused__))
263#else
264#define __unused /* delete */
265#endif
266
267/*
268 * __used: Note that item is needed, even if it appears to be unused.
269 */
270#if __GNUC_PREREQ__(3, 1)
271#define __used __attribute__((__used__))
272#else
273#define __used __unused
274#endif
275
276/*
277 * __diagused: Note that item is used in diagnostic code, but may be
278 * unused in non-diagnostic code.
279 */
280#if (defined(_KERNEL) && defined(DIAGNOSTIC)) \
281 || (!defined(_KERNEL) && !defined(NDEBUG))
282#define __diagused /* empty */
283#else
284#define __diagused __unused
285#endif
286
287/*
288 * __debugused: Note that item is used in debug code, but may be
289 * unused in non-debug code.
290 */
291#if defined(DEBUG)
292#define __debugused /* empty */
293#else
294#define __debugused __unused
295#endif
296
297#if __GNUC_PREREQ__(3, 1)
298#define __noprofile __attribute__((__no_instrument_function__))
299#else
300#define __noprofile /* nothing */
301#endif
302
303#if __GNUC_PREREQ__(4, 6) || defined(__clang__)
304#define __unreachable() __builtin_unreachable()
305#else
306#define __unreachable() do {} while (/*CONSTCOND*/0)
307#endif
308
309#if defined(__cplusplus)
310#define __BEGIN_EXTERN_C extern "C" {
311#define __END_EXTERN_C }
312#define __static_cast(x,y) static_cast<x>(y)
313#else
314#define __BEGIN_EXTERN_C
315#define __END_EXTERN_C
316#define __static_cast(x,y) (x)y
317#endif
318
319#if __GNUC_PREREQ__(4, 0)
320# define __dso_public __attribute__((__visibility__("default")))
321# define __dso_hidden __attribute__((__visibility__("hidden")))
322# define __BEGIN_PUBLIC_DECLS \
323 _Pragma("GCC visibility push(default)") __BEGIN_EXTERN_C
324# define __END_PUBLIC_DECLS __END_EXTERN_C _Pragma("GCC visibility pop")
325# define __BEGIN_HIDDEN_DECLS \
326 _Pragma("GCC visibility push(hidden)") __BEGIN_EXTERN_C
327# define __END_HIDDEN_DECLS __END_EXTERN_C _Pragma("GCC visibility pop")
328#else
329# define __dso_public
330# define __dso_hidden
331# define __BEGIN_PUBLIC_DECLS __BEGIN_EXTERN_C
332# define __END_PUBLIC_DECLS __END_EXTERN_C
333# define __BEGIN_HIDDEN_DECLS __BEGIN_EXTERN_C
334# define __END_HIDDEN_DECLS __END_EXTERN_C
335#endif
336#if __GNUC_PREREQ__(4, 2)
337# define __dso_protected __attribute__((__visibility__("protected")))
338#else
339# define __dso_protected
340#endif
341
342#define __BEGIN_DECLS __BEGIN_PUBLIC_DECLS
343#define __END_DECLS __END_PUBLIC_DECLS
344
345/*
346 * Non-static C99 inline functions are optional bodies. They don't
347 * create global symbols if not used, but can be replaced if desirable.
348 * This differs from the behavior of GCC before version 4.3. The nearest
349 * equivalent for older GCC is `extern inline'. For newer GCC, use the
350 * gnu_inline attribute additionally to get the old behavior.
351 *
352 * For C99 compilers other than GCC, the C99 behavior is expected.
353 */
354#if defined(__GNUC__) && defined(__GNUC_STDC_INLINE__)
355#define __c99inline extern __attribute__((__gnu_inline__)) __inline
356#elif defined(__GNUC__)
357#define __c99inline extern __inline
358#elif defined(__STDC_VERSION__)
359#define __c99inline __inline
360#endif
361
362#if defined(__lint__)
363#define __packed __packed
364#define __aligned(x) /* delete */
365#define __section(x) /* delete */
366#elif __GNUC_PREREQ__(2, 7) || defined(__PCC__)
367#define __packed __attribute__((__packed__))
368#define __aligned(x) __attribute__((__aligned__(x)))
369#define __section(x) __attribute__((__section__(x)))
370#elif defined(_MSC_VER)
371#define __packed /* ignore */
372#else
373#define __packed error: no __packed for this compiler
374#define __aligned(x) error: no __aligned for this compiler
375#define __section(x) error: no __section for this compiler
376#endif
377
378/*
379 * C99 defines the restrict type qualifier keyword, which was made available
380 * in GCC 2.92.
381 */
382#if defined(__lint__)
383#define __restrict /* delete __restrict when not supported */
384#elif __STDC_VERSION__ >= 199901L
385#define __restrict restrict
386#elif __GNUC_PREREQ__(2, 92)
387#define __restrict __restrict__
388#else
389#define __restrict /* delete __restrict when not supported */
390#endif
391
392/*
393 * C99 defines __func__ predefined identifier, which was made available
394 * in GCC 2.95.
395 */
396#if !(__STDC_VERSION__ >= 199901L)
397#if __GNUC_PREREQ__(2, 6)
398#define __func__ __PRETTY_FUNCTION__
399#elif __GNUC_PREREQ__(2, 4)
400#define __func__ __FUNCTION__
401#else
402#define __func__ ""
403#endif
404#endif /* !(__STDC_VERSION__ >= 199901L) */
405
406#if defined(_KERNEL)
407#if defined(NO_KERNEL_RCSIDS)
408#undef __KERNEL_RCSID
409#define __KERNEL_RCSID(_n, _s) /* nothing */
410#endif /* NO_KERNEL_RCSIDS */
411#endif /* _KERNEL */
412
413#if !defined(_STANDALONE) && !defined(_KERNEL)
414#if defined(__GNUC__) || defined(__PCC__)
415#define __RENAME(x) ___RENAME(x)
416#elif defined(__lint__)
417#define __RENAME(x) __symbolrename(x)
418#else
419#error "No function renaming possible"
420#endif /* __GNUC__ */
421#else /* _STANDALONE || _KERNEL */
422#define __RENAME(x) no renaming in kernel/standalone environment
423#endif
424
425/*
426 * A barrier to stop the optimizer from moving code or assume live
427 * register values. This is gcc specific, the version is more or less
428 * arbitrary, might work with older compilers.
429 */
430#if __GNUC_PREREQ__(2, 95)
431#define __insn_barrier() __asm __volatile("":::"memory")
432#else
433#define __insn_barrier() /* */
434#endif
435
436/*
437 * GNU C version 2.96 adds explicit branch prediction so that
438 * the CPU back-end can hint the processor and also so that
439 * code blocks can be reordered such that the predicted path
440 * sees a more linear flow, thus improving cache behavior, etc.
441 *
442 * The following two macros provide us with a way to use this
443 * compiler feature. Use __predict_true() if you expect the expression
444 * to evaluate to true, and __predict_false() if you expect the
445 * expression to evaluate to false.
446 *
447 * A few notes about usage:
448 *
449 * * Generally, __predict_false() error condition checks (unless
450 * you have some _strong_ reason to do otherwise, in which case
451 * document it), and/or __predict_true() `no-error' condition
452 * checks, assuming you want to optimize for the no-error case.
453 *
454 * * Other than that, if you don't know the likelihood of a test
455 * succeeding from empirical or other `hard' evidence, don't
456 * make predictions.
457 *
458 * * These are meant to be used in places that are run `a lot'.
459 * It is wasteful to make predictions in code that is run
460 * seldomly (e.g. at subsystem initialization time) as the
461 * basic block reordering that this affects can often generate
462 * larger code.
463 */
464#if __GNUC_PREREQ__(2, 96)
465#define __predict_true(exp) __builtin_expect((exp) != 0, 1)
466#define __predict_false(exp) __builtin_expect((exp) != 0, 0)
467#else
468#define __predict_true(exp) (exp)
469#define __predict_false(exp) (exp)
470#endif
471
472/*
473 * Compiler-dependent macros to declare that functions take printf-like
474 * or scanf-like arguments. They are null except for versions of gcc
475 * that are known to support the features properly (old versions of gcc-2
476 * didn't permit keeping the keywords out of the application namespace).
477 */
478#if __GNUC_PREREQ__(2, 7)
479#define __printflike(fmtarg, firstvararg) \
480 __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
481#ifndef __syslog_attribute__
482#define __syslog__ __printf__
483#endif
484#define __sysloglike(fmtarg, firstvararg) \
485 __attribute__((__format__ (__syslog__, fmtarg, firstvararg)))
486#define __scanflike(fmtarg, firstvararg) \
487 __attribute__((__format__ (__scanf__, fmtarg, firstvararg)))
488#define __format_arg(fmtarg) __attribute__((__format_arg__ (fmtarg)))
489#else
490#define __printflike(fmtarg, firstvararg) /* nothing */
491#define __scanflike(fmtarg, firstvararg) /* nothing */
492#define __sysloglike(fmtarg, firstvararg) /* nothing */
493#define __format_arg(fmtarg) /* nothing */
494#endif
495
496/*
497 * Macros for manipulating "link sets". Link sets are arrays of pointers
498 * to objects, which are gathered up by the linker.
499 *
500 * Object format-specific code has provided us with the following macros:
501 *
502 * __link_set_add_text(set, sym)
503 * Add a reference to the .text symbol `sym' to `set'.
504 *
505 * __link_set_add_rodata(set, sym)
506 * Add a reference to the .rodata symbol `sym' to `set'.
507 *
508 * __link_set_add_data(set, sym)
509 * Add a reference to the .data symbol `sym' to `set'.
510 *
511 * __link_set_add_bss(set, sym)
512 * Add a reference to the .bss symbol `sym' to `set'.
513 *
514 * __link_set_decl(set, ptype)
515 * Provide an extern declaration of the set `set', which
516 * contains an array of pointers to type `ptype'. This
517 * macro must be used by any code which wishes to reference
518 * the elements of a link set.
519 *
520 * __link_set_start(set)
521 * This points to the first slot in the link set.
522 *
523 * __link_set_end(set)
524 * This points to the (non-existent) slot after the last
525 * entry in the link set.
526 *
527 * __link_set_count(set)
528 * Count the number of entries in link set `set'.
529 *
530 * In addition, we provide the following macros for accessing link sets:
531 *
532 * __link_set_foreach(pvar, set)
533 * Iterate over the link set `set'. Because a link set is
534 * an array of pointers, pvar must be declared as "type **pvar",
535 * and the actual entry accessed as "*pvar".
536 *
537 * __link_set_entry(set, idx)
538 * Access the link set entry at index `idx' from set `set'.
539 */
540#define __link_set_foreach(pvar, set) \
541 for (pvar = __link_set_start(set); pvar < __link_set_end(set); pvar++)
542
543#define __link_set_entry(set, idx) (__link_set_start(set)[idx])
544
545/*
546 * Return the natural alignment in bytes for the given type
547 */
548#if __GNUC_PREREQ__(4, 1)
549#define __alignof(__t) __alignof__(__t)
550#else
551#define __alignof(__t) (sizeof(struct { char __x; __t __y; }) - sizeof(__t))
552#endif
553
554/*
555 * Return the number of elements in a statically-allocated array,
556 * __x.
557 */
558#define __arraycount(__x) (sizeof(__x) / sizeof(__x[0]))
559
560#ifndef __ASSEMBLER__
561/* __BIT(n): nth bit, where __BIT(0) == 0x1. */
562#define __BIT(__n) \
563 (((uintmax_t)(__n) >= NBBY * sizeof(uintmax_t)) ? 0 : \
564 ((uintmax_t)1 << (uintmax_t)((__n) & (NBBY * sizeof(uintmax_t) - 1))))
565
566/* __BITS(m, n): bits m through n, m < n. */
567#define __BITS(__m, __n) \
568 ((__BIT(MAX((__m), (__n)) + 1) - 1) ^ (__BIT(MIN((__m), (__n))) - 1))
569#endif /* !__ASSEMBLER__ */
570
571/* find least significant bit that is set */
572#define __LOWEST_SET_BIT(__mask) ((((__mask) - 1) & (__mask)) ^ (__mask))
573
574#define __PRIuBIT PRIuMAX
575#define __PRIuBITS __PRIuBIT
576
577#define __PRIxBIT PRIxMAX
578#define __PRIxBITS __PRIxBIT
579
580#define __SHIFTOUT(__x, __mask) (((__x) & (__mask)) / __LOWEST_SET_BIT(__mask))
581#define __SHIFTIN(__x, __mask) ((__x) * __LOWEST_SET_BIT(__mask))
582#define __SHIFTOUT_MASK(__mask) __SHIFTOUT((__mask), (__mask))
583
584/*
585 * Only to be used in other headers that are included from both c or c++
586 * NOT to be used in code.
587 */
588#ifdef __cplusplus
589#define __CAST(__dt, __st) static_cast<__dt>(__st)
590#else
591#define __CAST(__dt, __st) ((__dt)(__st))
592#endif
593
594#define __CASTV(__dt, __st) __CAST(__dt, __CAST(void *, __st))
595#define __CASTCV(__dt, __st) __CAST(__dt, __CAST(const void *, __st))
596
597#define __USE(a) ((void)(a))
598
599#define __type_mask(t) (/*LINTED*/sizeof(t) < sizeof(intmax_t) ? \
600 (~((1ULL << (sizeof(t) * NBBY)) - 1)) : 0ULL)
601
602#ifndef __ASSEMBLER__
603static __inline long long __zeroll(void) { return 0; }
604static __inline unsigned long long __zeroull(void) { return 0; }
605#else
606#define __zeroll() (0LL)
607#define __zeroull() (0ULL)
608#endif
609
610#define __negative_p(x) (!((x) > 0) && ((x) != 0))
611
612#define __type_min_s(t) ((t)((1ULL << (sizeof(t) * NBBY - 1))))
613#define __type_max_s(t) ((t)~((1ULL << (sizeof(t) * NBBY - 1))))
614#define __type_min_u(t) ((t)0ULL)
615#define __type_max_u(t) ((t)~0ULL)
616#define __type_is_signed(t) (/*LINTED*/__type_min_s(t) + (t)1 < (t)1)
617#define __type_min(t) (__type_is_signed(t) ? __type_min_s(t) : __type_min_u(t))
618#define __type_max(t) (__type_is_signed(t) ? __type_max_s(t) : __type_max_u(t))
619
620
621#define __type_fit_u(t, a) (/*LINTED*/!__negative_p(a) && \
622 (uintmax_t)((a) + __zeroull()) <= (uintmax_t)__type_max_u(t))
623
624#define __type_fit_s(t, a) (/*LINTED*/__negative_p(a) ? \
625 ((intmax_t)((a) + __zeroll()) >= (intmax_t)__type_min_s(t)) : \
626 ((intmax_t)((a) + __zeroll()) >= (intmax_t)0 && \
627 (intmax_t)((a) + __zeroll()) <= (intmax_t)__type_max_s(t)))
628
629/*
630 * return true if value 'a' fits in type 't'
631 */
632#define __type_fit(t, a) (__type_is_signed(t) ? \
633 __type_fit_s(t, a) : __type_fit_u(t, a))
634
635#endif /* !_SYS_CDEFS_H_ */
636