[thirdparty/systemd.git] / src / shared / macro.h

/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

#pragma once

/***
  This file is part of systemd.

  Copyright 2010 Lennart Poettering

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 of the License, or
  (at your option) any later version.

  systemd is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include <assert.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <inttypes.h>

#define _printf_(a,b) __attribute__ ((format (printf, a, b)))
#define _alloc_(...) __attribute__ ((alloc_size(__VA_ARGS__)))
#define _sentinel_ __attribute__ ((sentinel))
#define _unused_ __attribute__ ((unused))
#define _destructor_ __attribute__ ((destructor))
#define _pure_ __attribute__ ((pure))
#define _const_ __attribute__ ((const))
#define _deprecated_ __attribute__ ((deprecated))
#define _packed_ __attribute__ ((packed))
#define _malloc_ __attribute__ ((malloc))
#define _weak_ __attribute__ ((weak))
#define _likely_(x) (__builtin_expect(!!(x),1))
#define _unlikely_(x) (__builtin_expect(!!(x),0))
#define _public_ __attribute__ ((visibility("default")))
#define _hidden_ __attribute__ ((visibility("hidden")))
#define _weakref_(x) __attribute__((weakref(#x)))
#define _alignas_(x) __attribute__((aligned(__alignof(x))))
#define _cleanup_(x) __attribute__((cleanup(x)))

/* automake test harness */
#define EXIT_TEST_SKIP 77

#define XSTRINGIFY(x) #x
#define STRINGIFY(x) XSTRINGIFY(x)

#define XCONCATENATE(x, y) x ## y
#define CONCATENATE(x, y) XCONCATENATE(x, y)

#define UNIQUE(prefix) CONCATENATE(prefix, __LINE__)

/* Rounds up */

#define ALIGN4(l) (((l) + 3) & ~3)
#define ALIGN8(l) (((l) + 7) & ~7)

#if __SIZEOF_POINTER__ == 8
#define ALIGN(l) ALIGN8(l)
#elif __SIZEOF_POINTER__ == 4
#define ALIGN(l) ALIGN4(l)
#else
#error "Wut? Pointers are neither 4 nor 8 bytes long?"
#endif

#define ALIGN_PTR(p) ((void*) ALIGN((unsigned long) p))
#define ALIGN4_PTR(p) ((void*) ALIGN4((unsigned long) p))
#define ALIGN8_PTR(p) ((void*) ALIGN8((unsigned long) p))

static inline size_t ALIGN_TO(size_t l, size_t ali) {
        return ((l + ali - 1) & ~(ali - 1));
}

#define ALIGN_TO_PTR(p, ali) ((void*) ALIGN_TO((unsigned long) p))

#define ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0]))

/*
 * container_of - cast a member of a structure out to the containing structure
 * @ptr: the pointer to the member.
 * @type: the type of the container struct this is embedded in.
 * @member: the name of the member within the struct.
 *
 */
#define container_of(ptr, type, member)                                 \
        __extension__ ({                                                \
                        const typeof( ((type *)0)->member ) *__mptr = (ptr); \
                        (type *)( (char *)__mptr - offsetof(type,member) ); \
                })

#undef MAX
#define MAX(a,b)                                 \
        __extension__ ({                         \
                        typeof(a) _a = (a);      \
                        typeof(b) _b = (b);      \
                        _a > _b ? _a : _b;       \
                })

#define MAX3(x,y,z)                              \
        __extension__ ({                         \
                        typeof(x) _c = MAX(x,y); \
                        MAX(_c, z);              \
                })

#undef MIN
#define MIN(a,b)                                \
        __extension__ ({                        \
                        typeof(a) _a = (a);     \
                        typeof(b) _b = (b);     \
                        _a < _b ? _a : _b;      \
                })

#ifndef CLAMP
#define CLAMP(x, low, high)                                             \
        __extension__ ({                                                \
                        typeof(x) _x = (x);                             \
                        typeof(low) _low = (low);                       \
                        typeof(high) _high = (high);                    \
                        ((_x > _high) ? _high : ((_x < _low) ? _low : _x)); \
                })
#endif

#define assert_se(expr)                                                 \
        do {                                                            \
                if (_unlikely_(!(expr)))                                \
                        log_assert_failed(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
        } while (false)                                                 \

/* We override the glibc assert() here. */
#undef assert
#ifdef NDEBUG
#define assert(expr) do {} while(false)
#else
#define assert(expr) assert_se(expr)
#endif

#define assert_not_reached(t)                                           \
        do {                                                            \
                log_assert_failed_unreachable(t, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
        } while (false)

#if defined(static_assert)
#define assert_cc(expr) static_assert(expr, #expr)
#else
#define assert_cc(expr) struct UNIQUE(_assert_struct_) { char x[(expr) ? 0 : -1]; };
#endif

#define assert_return(expr, r)                                          \
        do {                                                            \
                if (_unlikely_(!(expr))) {                              \
                        log_assert_failed_return(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
                        return (r);                                     \
                }                                                       \
        } while (false)

#define PTR_TO_INT(p) ((int) ((intptr_t) (p)))
#define INT_TO_PTR(u) ((void *) ((intptr_t) (u)))
#define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p)))
#define UINT_TO_PTR(u) ((void *) ((uintptr_t) (u)))

#define PTR_TO_LONG(p) ((long) ((intptr_t) (p)))
#define LONG_TO_PTR(u) ((void *) ((intptr_t) (u)))
#define PTR_TO_ULONG(p) ((unsigned long) ((uintptr_t) (p)))
#define ULONG_TO_PTR(u) ((void *) ((uintptr_t) (u)))

#define PTR_TO_INT32(p) ((int32_t) ((intptr_t) (p)))
#define INT32_TO_PTR(u) ((void *) ((intptr_t) (u)))
#define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p)))
#define UINT32_TO_PTR(u) ((void *) ((uintptr_t) (u)))

#define PTR_TO_INT64(p) ((int64_t) ((intptr_t) (p)))
#define INT64_TO_PTR(u) ((void *) ((intptr_t) (u)))
#define PTR_TO_UINT64(p) ((uint64_t) ((uintptr_t) (p)))
#define UINT64_TO_PTR(u) ((void *) ((uintptr_t) (u)))

#define memzero(x,l) (memset((x), 0, (l)))
#define zero(x) (memzero(&(x), sizeof(x)))

#define CHAR_TO_STR(x) ((char[2]) { x, 0 })

#define char_array_0(x) x[sizeof(x)-1] = 0;

#define IOVEC_SET_STRING(i, s)                  \
        do {                                    \
                struct iovec *_i = &(i);        \
                char *_s = (char *)(s);         \
                _i->iov_base = _s;              \
                _i->iov_len = strlen(_s);       \
        } while(false)

static inline size_t IOVEC_TOTAL_SIZE(const struct iovec *i, unsigned n) {
        unsigned j;
        size_t r = 0;

        for (j = 0; j < n; j++)
                r += i[j].iov_len;

        return r;
}

static inline size_t IOVEC_INCREMENT(struct iovec *i, unsigned n, size_t k) {
        unsigned j;

        for (j = 0; j < n; j++) {
                size_t sub;

                if (_unlikely_(k <= 0))
                        break;

                sub = MIN(i[j].iov_len, k);
                i[j].iov_len -= sub;
                i[j].iov_base = (uint8_t*) i[j].iov_base + sub;
                k -= sub;
        }

        return k;
}

#define VA_FORMAT_ADVANCE(format, ap)                                   \
do {                                                                    \
        int _argtypes[128];                                             \
        size_t _i, _k;                                                  \
        _k = parse_printf_format((format), ELEMENTSOF(_argtypes), _argtypes); \
        assert(_k < ELEMENTSOF(_argtypes));                             \
        for (_i = 0; _i < _k; _i++) {                                   \
                if (_argtypes[_i] & PA_FLAG_PTR)  {                     \
                        (void) va_arg(ap, void*);                       \
                        continue;                                       \
                }                                                       \
                                                                        \
                switch (_argtypes[_i]) {                                \
                case PA_INT:                                            \
                case PA_INT|PA_FLAG_SHORT:                              \
                case PA_CHAR:                                           \
                        (void) va_arg(ap, int);                         \
                        break;                                          \
                case PA_INT|PA_FLAG_LONG:                               \
                        (void) va_arg(ap, long int);                    \
                        break;                                          \
                case PA_INT|PA_FLAG_LONG_LONG:                          \
                        (void) va_arg(ap, long long int);               \
                        break;                                          \
                case PA_WCHAR:                                          \
                        (void) va_arg(ap, wchar_t);                     \
                        break;                                          \
                case PA_WSTRING:                                        \
                case PA_STRING:                                         \
                case PA_POINTER:                                        \
                        (void) va_arg(ap, void*);                       \
                        break;                                          \
                case PA_FLOAT:                                          \
                case PA_DOUBLE:                                         \
                        (void) va_arg(ap, double);                      \
                        break;                                          \
                case PA_DOUBLE|PA_FLAG_LONG_DOUBLE:                     \
                        (void) va_arg(ap, long double);                 \
                        break;                                          \
                default:                                                \
                        assert_not_reached("Unknown format string argument."); \
                }                                                       \
        }                                                               \
} while(false)

 /* Because statfs.t_type can be int on some architectures, we have to cast
  * the const magic to the type, otherwise the compiler warns about
  * signed/unsigned comparison, because the magic can be 32 bit unsigned.
 */
#define F_TYPE_EQUAL(a, b) (a == (typeof(a)) b)

/* Returns the number of chars needed to format variables of the
 * specified type as a decimal string. Adds in extra space for a
 * negative '-' prefix. */
#define DECIMAL_STR_MAX(type)                                           \
        (2+(sizeof(type) <= 1 ? 3 :                                     \
            sizeof(type) <= 2 ? 5 :                                     \
            sizeof(type) <= 4 ? 10 :                                    \
            sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)])))

#define SET_FLAG(v, flag, b) \
        (v) = (b) ? ((v) | (flag)) : ((v) & ~(flag))

#define IN_SET(x, ...)                                                  \
        ({                                                              \
                const typeof(x) _x = (x);                               \
                unsigned _i;                                            \
                bool _found = false;                                    \
                for (_i = 0; _i < sizeof((const typeof(_x)[]) { __VA_ARGS__ })/sizeof(const typeof(_x)); _i++) \
                        if (((const typeof(_x)[]) { __VA_ARGS__ })[_i] == _x) { \
                                _found = true;                          \
                                break;                                  \
                        }                                               \
                _found;                                                 \
        })

/* Define C11 thread_local attribute even on older gcc compiler
 * version */
#ifndef thread_local
/*
 * Don't break on glibc < 2.16 that doesn't define __STDC_NO_THREADS__
 * see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53769
 */
#if __STDC_VERSION__ >= 201112L && !(defined(__STDC_NO_THREADS__) || (defined(__GNU_LIBRARY__) && __GLIBC__ == 2 && __GLIBC_MINOR__ < 16))
#define thread_local _Thread_local
#else
#define thread_local __thread
#endif
#endif

/* Define C11 noreturn without <stdnoreturn.h> and even on older gcc
 * compiler versions */
#ifndef noreturn
#if __STDC_VERSION__ >= 201112L
#define noreturn _Noreturn
#else
#define noreturn __attribute__((noreturn))
#endif
#endif

#include "log.h"
Commit	Line	Data
03467c88	1	/-- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil --/
60918275	2
c2f1db8f	3	#pragma once
60918275	4
a7334b09 LP	5	/***
	6	This file is part of systemd.
	7
	8	Copyright 2010 Lennart Poettering
	9
	10	systemd is free software; you can redistribute it and/or modify it
5430f7f2 LP	11	under the terms of the GNU Lesser General Public License as published by
5430f7f2 LP	12	the Free Software Foundation; either version 2.1 of the License, or
a7334b09 LP	13	(at your option) any later version.
	14
	15	systemd is distributed in the hope that it will be useful, but
	16	WITHOUT ANY WARRANTY; without even the implied warranty of
	17	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
5430f7f2	18	Lesser General Public License for more details.
a7334b09	19
5430f7f2	20	You should have received a copy of the GNU Lesser General Public License
a7334b09 LP	21	along with systemd; If not, see <http://www.gnu.org/licenses/>.
	22	***/
	23
60918275	24	#include <assert.h>
6a39419f	25	#include <sys/param.h>
60918275	26	#include <sys/types.h>
c31e1495 LP	27	#include <sys/uio.h>
c31e1495 LP	28	#include <inttypes.h>
60918275	29
44b601bc	30	#define _printf_(a,b) __attribute__ ((format (printf, a, b)))
750ef272	31	#define _alloc_(...) __attribute__ ((alloc_size(__VA_ARGS__)))
93a46b0b	32	#define _sentinel_ __attribute__ ((sentinel))
93a46b0b LP	33	#define _unused_ __attribute__ ((unused))
	34	#define _destructor_ __attribute__ ((destructor))
	35	#define _pure_ __attribute__ ((pure))
	36	#define _const_ __attribute__ ((const))
	37	#define _deprecated_ __attribute__ ((deprecated))
	38	#define _packed_ __attribute__ ((packed))
	39	#define _malloc_ __attribute__ ((malloc))
	40	#define _weak_ __attribute__ ((weak))
	41	#define _likely_(x) (__builtin_expect(!!(x),1))
	42	#define _unlikely_(x) (__builtin_expect(!!(x),0))
40473a70 LP	43	#define _public_ __attribute__ ((visibility("default")))
40473a70 LP	44	#define _hidden_ __attribute__ ((visibility("hidden")))
ad780f19	45	#define _weakref_(x) __attribute__((weakref(#x)))
19d1e4ee	46	#define _alignas_(x) __attribute__((aligned(__alignof(x))))
dfb33a97	47	#define _cleanup_(x) __attribute__((cleanup(x)))
60918275	48
49e5de64 ZJS	49	/* automake test harness */
	50	#define EXIT_TEST_SKIP 77
	51
bef2733f LP	52	#define XSTRINGIFY(x) #x
	53	#define STRINGIFY(x) XSTRINGIFY(x)
	54
ab9cbe34 LS	55	#define XCONCATENATE(x, y) x ## y
	56	#define CONCATENATE(x, y) XCONCATENATE(x, y)
	57
	58	#define UNIQUE(prefix) CONCATENATE(prefix, __LINE__)
	59
60918275	60	/* Rounds up */
9be9c7cf LP	61
	62	#define ALIGN4(l) (((l) + 3) & ~3)
	63	#define ALIGN8(l) (((l) + 7) & ~7)
	64
	65	#if __SIZEOF_POINTER__ == 8
	66	#define ALIGN(l) ALIGN8(l)
	67	#elif __SIZEOF_POINTER__ == 4
	68	#define ALIGN(l) ALIGN4(l)
	69	#else
	70	#error "Wut? Pointers are neither 4 nor 8 bytes long?"
	71	#endif
	72
49aa47c7 LP	73	#define ALIGN_PTR(p) ((void*) ALIGN((unsigned long) p))
49aa47c7 LP	74	#define ALIGN4_PTR(p) ((void*) ALIGN4((unsigned long) p))
e86b80b8 LP	75	#define ALIGN8_PTR(p) ((void*) ALIGN8((unsigned long) p))
e86b80b8 LP	76
37f85e66	77	static inline size_t ALIGN_TO(size_t l, size_t ali) {
37f85e66	78	return ((l + ali - 1) & ~(ali - 1));
22be093f LP	79	}
22be093f LP	80
49aa47c7 LP	81	#define ALIGN_TO_PTR(p, ali) ((void*) ALIGN_TO((unsigned long) p))
49aa47c7 LP	82
60918275 LP	83	#define ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0]))
60918275 LP	84
bbc98d32 KS	85	/*
	86	* container_of - cast a member of a structure out to the containing structure
	87	* @ptr: the pointer to the member.
	88	* @type: the type of the container struct this is embedded in.
	89	* @member: the name of the member within the struct.
	90	*
	91	*/
fa70beaa LP	92	#define container_of(ptr, type, member) \
	93	__extension__ ({ \
	94	const typeof( ((type )0)->member ) __mptr = (ptr); \
	95	(type )( (char )__mptr - offsetof(type,member) ); \
	96	})
bbc98d32	97
9607d947 CR	98	#undef MAX
	99	#define MAX(a,b) \
	100	__extension__ ({ \
	101	typeof(a) _a = (a); \
	102	typeof(b) _b = (b); \
	103	_a > _b ? _a : _b; \
60918275 LP	104	})
60918275 LP	105
9607d947 CR	106	#define MAX3(x,y,z) \
	107	__extension__ ({ \
	108	typeof(x) _c = MAX(x,y); \
	109	MAX(_c, z); \
	110	})
3b63d2d3	111
9607d947	112	#undef MIN
60918275 LP	113	#define MIN(a,b) \
	114	__extension__ ({ \
	115	typeof(a) _a = (a); \
	116	typeof(b) _b = (b); \
	117	_a < _b ? _a : _b; \
	118	})
	119
907809fc	120	#ifndef CLAMP
60918275 LP	121	#define CLAMP(x, low, high) \
	122	__extension__ ({ \
	123	typeof(x) _x = (x); \
	124	typeof(low) _low = (low); \
	125	typeof(high) _high = (high); \
	126	((_x > _high) ? _high : ((_x < _low) ? _low : _x)); \
	127	})
907809fc	128	#endif
60918275	129
dd8f71ee LP	130	#define assert_se(expr) \
dd8f71ee LP	131	do { \
93a46b0b	132	if (_unlikely_(!(expr))) \
b7f33638	133	log_assert_failed(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
dd8f71ee LP	134	} while (false) \
	135
	136	/* We override the glibc assert() here. */
	137	#undef assert
	138	#ifdef NDEBUG
	139	#define assert(expr) do {} while(false)
	140	#else
	141	#define assert(expr) assert_se(expr)
	142	#endif
60918275	143
dd8f71ee LP	144	#define assert_not_reached(t) \
dd8f71ee LP	145	do { \
b7f33638	146	log_assert_failed_unreachable(t, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
dd8f71ee	147	} while (false)
60918275	148
f791c684	149	#if defined(static_assert)
780dbeef	150	#define assert_cc(expr) static_assert(expr, #expr)
f791c684	151	#else
ab9cbe34	152	#define assert_cc(expr) struct UNIQUE(_assert_struct_) { char x[(expr) ? 0 : -1]; };
f791c684	153	#endif
60918275	154
80514f9c LP	155	#define assert_return(expr, r) \
	156	do { \
	157	if (_unlikely_(!(expr))) { \
	158	log_assert_failed_return(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
	159	return (r); \
	160	} \
18387b59 LP	161	} while (false)
18387b59 LP	162
a3dc3547 KS	163	#define PTR_TO_INT(p) ((int) ((intptr_t) (p)))
a3dc3547 KS	164	#define INT_TO_PTR(u) ((void *) ((intptr_t) (u)))
60918275	165	#define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p)))
a3dc3547	166	#define UINT_TO_PTR(u) ((void *) ((uintptr_t) (u)))
60918275	167
a3dc3547 KS	168	#define PTR_TO_LONG(p) ((long) ((intptr_t) (p)))
a3dc3547 KS	169	#define LONG_TO_PTR(u) ((void *) ((intptr_t) (u)))
c6c18be3	170	#define PTR_TO_ULONG(p) ((unsigned long) ((uintptr_t) (p)))
a3dc3547	171	#define ULONG_TO_PTR(u) ((void *) ((uintptr_t) (u)))
c6c18be3	172
a3dc3547 KS	173	#define PTR_TO_INT32(p) ((int32_t) ((intptr_t) (p)))
	174	#define INT32_TO_PTR(u) ((void *) ((intptr_t) (u)))
	175	#define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p)))
	176	#define UINT32_TO_PTR(u) ((void *) ((uintptr_t) (u)))
60918275	177
a3dc3547 KS	178	#define PTR_TO_INT64(p) ((int64_t) ((intptr_t) (p)))
	179	#define INT64_TO_PTR(u) ((void *) ((intptr_t) (u)))
	180	#define PTR_TO_UINT64(p) ((uint64_t) ((uintptr_t) (p)))
	181	#define UINT64_TO_PTR(u) ((void *) ((uintptr_t) (u)))
c6c18be3	182
476fe607 LP	183	#define memzero(x,l) (memset((x), 0, (l)))
	184	#define zero(x) (memzero(&(x), sizeof(x)))
	185
a9c55a88 LP	186	#define CHAR_TO_STR(x) ((char[2]) { x, 0 })
a9c55a88 LP	187
034c6ed7 LP	188	#define char_array_0(x) x[sizeof(x)-1] = 0;
034c6ed7 LP	189
bff7c062	190	#define IOVEC_SET_STRING(i, s) \
2fa086a8	191	do { \
bff7c062 LP	192	struct iovec *_i = &(i); \
	193	char _s = (char )(s); \
	194	_i->iov_base = _s; \
	195	_i->iov_len = strlen(_s); \
9b3c575e	196	} while(false)
2fa086a8	197
c31e1495 LP	198	static inline size_t IOVEC_TOTAL_SIZE(const struct iovec *i, unsigned n) {
	199	unsigned j;
	200	size_t r = 0;
	201
	202	for (j = 0; j < n; j++)
	203	r += i[j].iov_len;
	204
	205	return r;
	206	}
	207
	208	static inline size_t IOVEC_INCREMENT(struct iovec *i, unsigned n, size_t k) {
	209	unsigned j;
	210
	211	for (j = 0; j < n; j++) {
	212	size_t sub;
	213
	214	if (_unlikely_(k <= 0))
	215	break;
	216
	217	sub = MIN(i[j].iov_len, k);
	218	i[j].iov_len -= sub;
	219	i[j].iov_base = (uint8_t*) i[j].iov_base + sub;
	220	k -= sub;
	221	}
	222
	223	return k;
	224	}
	225
cecd32f6 LP	226	#define VA_FORMAT_ADVANCE(format, ap) \
	227	do { \
	228	int _argtypes[128]; \
963ddb91 LP	229	size_t _i, _k; \
963ddb91 LP	230	_k = parse_printf_format((format), ELEMENTSOF(_argtypes), _argtypes); \
cecd32f6	231	assert(_k < ELEMENTSOF(_argtypes)); \
963ddb91 LP	232	for (_i = 0; _i < _k; _i++) { \
	233	if (_argtypes[_i] & PA_FLAG_PTR) { \
	234	(void) va_arg(ap, void*); \
	235	continue; \
	236	} \
	237	\
	238	switch (_argtypes[_i]) { \
	239	case PA_INT: \
	240	case PA_INT\|PA_FLAG_SHORT: \
	241	case PA_CHAR: \
	242	(void) va_arg(ap, int); \
	243	break; \
	244	case PA_INT\|PA_FLAG_LONG: \
	245	(void) va_arg(ap, long int); \
	246	break; \
	247	case PA_INT\|PA_FLAG_LONG_LONG: \
	248	(void) va_arg(ap, long long int); \
	249	break; \
	250	case PA_WCHAR: \
	251	(void) va_arg(ap, wchar_t); \
	252	break; \
	253	case PA_WSTRING: \
	254	case PA_STRING: \
	255	case PA_POINTER: \
	256	(void) va_arg(ap, void*); \
	257	break; \
	258	case PA_FLOAT: \
	259	case PA_DOUBLE: \
	260	(void) va_arg(ap, double); \
	261	break; \
	262	case PA_DOUBLE\|PA_FLAG_LONG_DOUBLE: \
	263	(void) va_arg(ap, long double); \
	264	break; \
	265	default: \
	266	assert_not_reached("Unknown format string argument."); \
	267	} \
	268	} \
	269	} while(false)
	270
e5f476db	271	/* Because statfs.t_type can be int on some architectures, we have to cast
bdd29249 HH	272	* the const magic to the type, otherwise the compiler warns about
	273	* signed/unsigned comparison, because the magic can be 32 bit unsigned.
	274	*/
c51cf056	275	#define F_TYPE_EQUAL(a, b) (a == (typeof(a)) b)
bdd29249	276
fa70beaa LP	277	/* Returns the number of chars needed to format variables of the
	278	* specified type as a decimal string. Adds in extra space for a
	279	* negative '-' prefix. */
fa70beaa	280	#define DECIMAL_STR_MAX(type) \
5bcb0f2b	281	(2+(sizeof(type) <= 1 ? 3 : \
fa70beaa LP	282	sizeof(type) <= 2 ? 5 : \
	283	sizeof(type) <= 4 ? 10 : \
	284	sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)])))
	285
264ad849 LP	286	#define SET_FLAG(v, flag, b) \
	287	(v) = (b) ? ((v) \| (flag)) : ((v) & ~(flag))
	288
059d9fbb LP	289	#define IN_SET(x, ...) \
	290	({ \
	291	const typeof(x) _x = (x); \
	292	unsigned _i; \
	293	bool _found = false; \
	294	for (_i = 0; _i < sizeof((const typeof(_x)[]) { __VA_ARGS__ })/sizeof(const typeof(_x)); _i++) \
	295	if (((const typeof(_x)[]) { __VA_ARGS__ })[_i] == _x) { \
	296	_found = true; \
	297	break; \
	298	} \
	299	_found; \
cabb7806 LP	300	})
cabb7806 LP	301
919ce0b7 SL	302	/* Define C11 thread_local attribute even on older gcc compiler
919ce0b7 SL	303	* version */
ec202eae SL	304	#ifndef thread_local
	305	/*
	306	* Don't break on glibc < 2.16 that doesn't define __STDC_NO_THREADS__
	307	* see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53769
	308	*/
	309	#if __STDC_VERSION__ >= 201112L && !(defined(__STDC_NO_THREADS__) \|\| (defined(__GNU_LIBRARY__) && __GLIBC__ == 2 && __GLIBC_MINOR__ < 16))
	310	#define thread_local _Thread_local
	311	#else
	312	#define thread_local __thread
	313	#endif
	314	#endif
cabb7806	315
919ce0b7 SL	316	/* Define C11 noreturn without <stdnoreturn.h> and even on older gcc
	317	* compiler versions */
	318	#ifndef noreturn
	319	#if __STDC_VERSION__ >= 201112L
	320	#define noreturn _Noreturn
	321	#else
	322	#define noreturn __attribute__((noreturn))
	323	#endif
	324	#endif
	325
dd8f71ee	326	#include "log.h"