[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)))

/* Temporarily disable some warnings */
#define DISABLE_WARNING_DECLARATION_AFTER_STATEMENT                     \
        _Pragma("GCC diagnostic push");                                 \
        _Pragma("GCC diagnostic ignored \"-Wdeclaration-after-statement\"")

#define DISABLE_WARNING_FORMAT_NONLITERAL                               \
        _Pragma("GCC diagnostic push");                                 \
        _Pragma("GCC diagnostic ignored \"-Wformat-nonliteral\"")

#define DISABLE_WARNING_MISSING_PROTOTYPES                              \
        _Pragma("GCC diagnostic push");                                 \
        _Pragma("GCC diagnostic ignored \"-Wmissing-prototypes\"")

#define DISABLE_WARNING_NONNULL                                         \
        _Pragma("GCC diagnostic push");                                 \
        _Pragma("GCC diagnostic ignored \"-Wnonnull\"")

#define REENABLE_WARNING                                                \
        _Pragma("GCC diagnostic pop")

/* 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, ali))

#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;      \
                })

#define LESS_BY(A,B)                            \
        __extension__ ({                        \
                        typeof(A) _A = (A);     \
                        typeof(B) _B = (B);     \
                        _A > _B ? _A - _B : 0;  \
                })

#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)
/* static_assert() is sometimes defined in a way that trips up
 * -Wdeclaration-after-statement, hence let's temporarily turn off
 * this warning around it. */
#define assert_cc(expr)                                                 \
        DISABLE_WARNING_DECLARATION_AFTER_STATEMENT;                    \
        static_assert(expr, #expr);                                     \
        REENABLE_WARNING
#else
#define assert_cc(expr)                                                 \
        DISABLE_WARNING_DECLARATION_AFTER_STATEMENT;                    \
        struct UNIQUE(_assert_struct_) {                                \
                char x[(expr) ? 0 : -1];                                \
        };                                                              \
        REENABLE_WARNING
#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, y, ...)                                               \
        ({                                                              \
                const typeof(y) _y = (y);                               \
                const typeof(_y) _x = (x);                              \
                unsigned _i;                                            \
                bool _found = false;                                    \
                for (_i = 0; _i < 1 + sizeof((const typeof(_x)[]) { __VA_ARGS__ })/sizeof(const typeof(_x)); _i++) \
                        if (((const typeof(_x)[]) { _y, __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
7ebe131a LP	49	/* Temporarily disable some warnings */
	50	#define DISABLE_WARNING_DECLARATION_AFTER_STATEMENT \
	51	_Pragma("GCC diagnostic push"); \
	52	_Pragma("GCC diagnostic ignored \"-Wdeclaration-after-statement\"")
	53
bcfce235 LP	54	#define DISABLE_WARNING_FORMAT_NONLITERAL \
	55	_Pragma("GCC diagnostic push"); \
	56	_Pragma("GCC diagnostic ignored \"-Wformat-nonliteral\"")
	57
f0f2e63b LP	58	#define DISABLE_WARNING_MISSING_PROTOTYPES \
	59	_Pragma("GCC diagnostic push"); \
	60	_Pragma("GCC diagnostic ignored \"-Wmissing-prototypes\"")
	61
8fca4e30 LP	62	#define DISABLE_WARNING_NONNULL \
	63	_Pragma("GCC diagnostic push"); \
	64	_Pragma("GCC diagnostic ignored \"-Wnonnull\"")
	65
7ebe131a LP	66	#define REENABLE_WARNING \
	67	_Pragma("GCC diagnostic pop")
	68
49e5de64 ZJS	69	/* automake test harness */
	70	#define EXIT_TEST_SKIP 77
	71
bef2733f LP	72	#define XSTRINGIFY(x) #x
	73	#define STRINGIFY(x) XSTRINGIFY(x)
	74
ab9cbe34 LS	75	#define XCONCATENATE(x, y) x ## y
	76	#define CONCATENATE(x, y) XCONCATENATE(x, y)
	77
	78	#define UNIQUE(prefix) CONCATENATE(prefix, __LINE__)
	79
60918275	80	/* Rounds up */
9be9c7cf LP	81
	82	#define ALIGN4(l) (((l) + 3) & ~3)
	83	#define ALIGN8(l) (((l) + 7) & ~7)
	84
	85	#if __SIZEOF_POINTER__ == 8
	86	#define ALIGN(l) ALIGN8(l)
	87	#elif __SIZEOF_POINTER__ == 4
	88	#define ALIGN(l) ALIGN4(l)
	89	#else
	90	#error "Wut? Pointers are neither 4 nor 8 bytes long?"
	91	#endif
	92
49aa47c7 LP	93	#define ALIGN_PTR(p) ((void*) ALIGN((unsigned long) p))
49aa47c7 LP	94	#define ALIGN4_PTR(p) ((void*) ALIGN4((unsigned long) p))
e86b80b8 LP	95	#define ALIGN8_PTR(p) ((void*) ALIGN8((unsigned long) p))
e86b80b8 LP	96
37f85e66	97	static inline size_t ALIGN_TO(size_t l, size_t ali) {
37f85e66	98	return ((l + ali - 1) & ~(ali - 1));
22be093f LP	99	}
22be093f LP	100
1c231f56	101	#define ALIGN_TO_PTR(p, ali) ((void*) ALIGN_TO((unsigned long) p, ali))
49aa47c7	102
60918275 LP	103	#define ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0]))
60918275 LP	104
bbc98d32 KS	105	/*
	106	* container_of - cast a member of a structure out to the containing structure
	107	* @ptr: the pointer to the member.
	108	* @type: the type of the container struct this is embedded in.
	109	* @member: the name of the member within the struct.
	110	*
	111	*/
fa70beaa LP	112	#define container_of(ptr, type, member) \
	113	__extension__ ({ \
	114	const typeof( ((type )0)->member ) __mptr = (ptr); \
	115	(type )( (char )__mptr - offsetof(type,member) ); \
	116	})
bbc98d32	117
9607d947 CR	118	#undef MAX
	119	#define MAX(a,b) \
	120	__extension__ ({ \
	121	typeof(a) _a = (a); \
	122	typeof(b) _b = (b); \
	123	_a > _b ? _a : _b; \
60918275 LP	124	})
60918275 LP	125
9607d947 CR	126	#define MAX3(x,y,z) \
	127	__extension__ ({ \
	128	typeof(x) _c = MAX(x,y); \
	129	MAX(_c, z); \
	130	})
3b63d2d3	131
9607d947	132	#undef MIN
60918275 LP	133	#define MIN(a,b) \
	134	__extension__ ({ \
	135	typeof(a) _a = (a); \
	136	typeof(b) _b = (b); \
	137	_a < _b ? _a : _b; \
	138	})
	139
348ced90 ZJS	140	#define LESS_BY(A,B) \
	141	__extension__ ({ \
	142	typeof(A) _A = (A); \
	143	typeof(B) _B = (B); \
	144	_A > _B ? _A - _B : 0; \
	145	})
	146
907809fc	147	#ifndef CLAMP
60918275 LP	148	#define CLAMP(x, low, high) \
	149	__extension__ ({ \
	150	typeof(x) _x = (x); \
	151	typeof(low) _low = (low); \
	152	typeof(high) _high = (high); \
	153	((_x > _high) ? _high : ((_x < _low) ? _low : _x)); \
	154	})
907809fc	155	#endif
60918275	156
dd8f71ee LP	157	#define assert_se(expr) \
dd8f71ee LP	158	do { \
93a46b0b	159	if (_unlikely_(!(expr))) \
b7f33638	160	log_assert_failed(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
dd8f71ee LP	161	} while (false) \
	162
	163	/* We override the glibc assert() here. */
	164	#undef assert
	165	#ifdef NDEBUG
	166	#define assert(expr) do {} while(false)
	167	#else
	168	#define assert(expr) assert_se(expr)
	169	#endif
60918275	170
dd8f71ee LP	171	#define assert_not_reached(t) \
dd8f71ee LP	172	do { \
b7f33638	173	log_assert_failed_unreachable(t, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
dd8f71ee	174	} while (false)
60918275	175
f791c684	176	#if defined(static_assert)
7ebe131a LP	177	/* static_assert() is sometimes defined in a way that trips up
	178	* -Wdeclaration-after-statement, hence let's temporarily turn off
	179	* this warning around it. */
	180	#define assert_cc(expr) \
	181	DISABLE_WARNING_DECLARATION_AFTER_STATEMENT; \
	182	static_assert(expr, #expr); \
	183	REENABLE_WARNING
f791c684	184	#else
7ebe131a LP	185	#define assert_cc(expr) \
	186	DISABLE_WARNING_DECLARATION_AFTER_STATEMENT; \
	187	struct UNIQUE(_assert_struct_) { \
	188	char x[(expr) ? 0 : -1]; \
	189	}; \
	190	REENABLE_WARNING
f791c684	191	#endif
60918275	192
80514f9c LP	193	#define assert_return(expr, r) \
	194	do { \
	195	if (_unlikely_(!(expr))) { \
	196	log_assert_failed_return(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
	197	return (r); \
	198	} \
18387b59 LP	199	} while (false)
18387b59 LP	200
a3dc3547 KS	201	#define PTR_TO_INT(p) ((int) ((intptr_t) (p)))
a3dc3547 KS	202	#define INT_TO_PTR(u) ((void *) ((intptr_t) (u)))
60918275	203	#define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p)))
a3dc3547	204	#define UINT_TO_PTR(u) ((void *) ((uintptr_t) (u)))
60918275	205
a3dc3547 KS	206	#define PTR_TO_LONG(p) ((long) ((intptr_t) (p)))
a3dc3547 KS	207	#define LONG_TO_PTR(u) ((void *) ((intptr_t) (u)))
c6c18be3	208	#define PTR_TO_ULONG(p) ((unsigned long) ((uintptr_t) (p)))
a3dc3547	209	#define ULONG_TO_PTR(u) ((void *) ((uintptr_t) (u)))
c6c18be3	210
a3dc3547 KS	211	#define PTR_TO_INT32(p) ((int32_t) ((intptr_t) (p)))
	212	#define INT32_TO_PTR(u) ((void *) ((intptr_t) (u)))
	213	#define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p)))
	214	#define UINT32_TO_PTR(u) ((void *) ((uintptr_t) (u)))
60918275	215
a3dc3547 KS	216	#define PTR_TO_INT64(p) ((int64_t) ((intptr_t) (p)))
	217	#define INT64_TO_PTR(u) ((void *) ((intptr_t) (u)))
	218	#define PTR_TO_UINT64(p) ((uint64_t) ((uintptr_t) (p)))
	219	#define UINT64_TO_PTR(u) ((void *) ((uintptr_t) (u)))
c6c18be3	220
476fe607 LP	221	#define memzero(x,l) (memset((x), 0, (l)))
	222	#define zero(x) (memzero(&(x), sizeof(x)))
	223
a9c55a88 LP	224	#define CHAR_TO_STR(x) ((char[2]) { x, 0 })
a9c55a88 LP	225
034c6ed7 LP	226	#define char_array_0(x) x[sizeof(x)-1] = 0;
034c6ed7 LP	227
bff7c062	228	#define IOVEC_SET_STRING(i, s) \
2fa086a8	229	do { \
bff7c062 LP	230	struct iovec *_i = &(i); \
	231	char _s = (char )(s); \
	232	_i->iov_base = _s; \
	233	_i->iov_len = strlen(_s); \
9b3c575e	234	} while(false)
2fa086a8	235
c31e1495 LP	236	static inline size_t IOVEC_TOTAL_SIZE(const struct iovec *i, unsigned n) {
	237	unsigned j;
	238	size_t r = 0;
	239
	240	for (j = 0; j < n; j++)
	241	r += i[j].iov_len;
	242
	243	return r;
	244	}
	245
	246	static inline size_t IOVEC_INCREMENT(struct iovec *i, unsigned n, size_t k) {
	247	unsigned j;
	248
	249	for (j = 0; j < n; j++) {
	250	size_t sub;
	251
	252	if (_unlikely_(k <= 0))
	253	break;
	254
	255	sub = MIN(i[j].iov_len, k);
	256	i[j].iov_len -= sub;
	257	i[j].iov_base = (uint8_t*) i[j].iov_base + sub;
	258	k -= sub;
	259	}
	260
	261	return k;
	262	}
	263
cecd32f6 LP	264	#define VA_FORMAT_ADVANCE(format, ap) \
	265	do { \
	266	int _argtypes[128]; \
963ddb91 LP	267	size_t _i, _k; \
963ddb91 LP	268	_k = parse_printf_format((format), ELEMENTSOF(_argtypes), _argtypes); \
cecd32f6	269	assert(_k < ELEMENTSOF(_argtypes)); \
963ddb91 LP	270	for (_i = 0; _i < _k; _i++) { \
	271	if (_argtypes[_i] & PA_FLAG_PTR) { \
	272	(void) va_arg(ap, void*); \
	273	continue; \
	274	} \
	275	\
	276	switch (_argtypes[_i]) { \
	277	case PA_INT: \
	278	case PA_INT\|PA_FLAG_SHORT: \
	279	case PA_CHAR: \
	280	(void) va_arg(ap, int); \
	281	break; \
	282	case PA_INT\|PA_FLAG_LONG: \
	283	(void) va_arg(ap, long int); \
	284	break; \
	285	case PA_INT\|PA_FLAG_LONG_LONG: \
	286	(void) va_arg(ap, long long int); \
	287	break; \
	288	case PA_WCHAR: \
	289	(void) va_arg(ap, wchar_t); \
	290	break; \
	291	case PA_WSTRING: \
	292	case PA_STRING: \
	293	case PA_POINTER: \
	294	(void) va_arg(ap, void*); \
	295	break; \
	296	case PA_FLOAT: \
	297	case PA_DOUBLE: \
	298	(void) va_arg(ap, double); \
	299	break; \
	300	case PA_DOUBLE\|PA_FLAG_LONG_DOUBLE: \
	301	(void) va_arg(ap, long double); \
	302	break; \
	303	default: \
	304	assert_not_reached("Unknown format string argument."); \
	305	} \
	306	} \
	307	} while(false)
	308
e5f476db	309	/* Because statfs.t_type can be int on some architectures, we have to cast
bdd29249 HH	310	* the const magic to the type, otherwise the compiler warns about
	311	* signed/unsigned comparison, because the magic can be 32 bit unsigned.
	312	*/
c51cf056	313	#define F_TYPE_EQUAL(a, b) (a == (typeof(a)) b)
bdd29249	314
fa70beaa LP	315	/* Returns the number of chars needed to format variables of the
	316	* specified type as a decimal string. Adds in extra space for a
	317	* negative '-' prefix. */
fa70beaa	318	#define DECIMAL_STR_MAX(type) \
5bcb0f2b	319	(2+(sizeof(type) <= 1 ? 3 : \
fa70beaa LP	320	sizeof(type) <= 2 ? 5 : \
	321	sizeof(type) <= 4 ? 10 : \
	322	sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)])))
	323
264ad849 LP	324	#define SET_FLAG(v, flag, b) \
	325	(v) = (b) ? ((v) \| (flag)) : ((v) & ~(flag))
	326
dc36d78e	327	#define IN_SET(x, y, ...) \
059d9fbb	328	({ \
dc36d78e LP	329	const typeof(y) _y = (y); \
dc36d78e LP	330	const typeof(_y) _x = (x); \
059d9fbb LP	331	unsigned _i; \
059d9fbb LP	332	bool _found = false; \
dc36d78e LP	333	for (_i = 0; _i < 1 + sizeof((const typeof(_x)[]) { __VA_ARGS__ })/sizeof(const typeof(_x)); _i++) \
dc36d78e LP	334	if (((const typeof(_x)[]) { _y, __VA_ARGS__ })[_i] == _x) { \
059d9fbb LP	335	_found = true; \
	336	break; \
	337	} \
	338	_found; \
cabb7806 LP	339	})
cabb7806 LP	340
919ce0b7 SL	341	/* Define C11 thread_local attribute even on older gcc compiler
919ce0b7 SL	342	* version */
ec202eae SL	343	#ifndef thread_local
	344	/*
	345	* Don't break on glibc < 2.16 that doesn't define __STDC_NO_THREADS__
	346	* see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53769
	347	*/
	348	#if __STDC_VERSION__ >= 201112L && !(defined(__STDC_NO_THREADS__) \|\| (defined(__GNU_LIBRARY__) && __GLIBC__ == 2 && __GLIBC_MINOR__ < 16))
	349	#define thread_local _Thread_local
	350	#else
	351	#define thread_local __thread
	352	#endif
	353	#endif
cabb7806	354
919ce0b7 SL	355	/* Define C11 noreturn without <stdnoreturn.h> and even on older gcc
	356	* compiler versions */
	357	#ifndef noreturn
	358	#if __STDC_VERSION__ >= 201112L
	359	#define noreturn _Noreturn
	360	#else
	361	#define noreturn __attribute__((noreturn))
	362	#endif
	363	#endif
	364
dd8f71ee	365	#include "log.h"