509 lines
22 KiB
C
509 lines
22 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#pragma once
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#include <inttypes.h>
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#include <stdbool.h>
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#include <sys/param.h>
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#include <sys/sysmacros.h>
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#include <sys/types.h>
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#define _printf_(a, b) __attribute__ ((format (printf, a, b)))
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#ifdef __clang__
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# define _alloc_(...)
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#else
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# define _alloc_(...) __attribute__ ((alloc_size(__VA_ARGS__)))
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#endif
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#define _sentinel_ __attribute__ ((sentinel))
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#define _unused_ __attribute__ ((unused))
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#define _destructor_ __attribute__ ((destructor))
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#define _pure_ __attribute__ ((pure))
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#define _const_ __attribute__ ((const))
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#define _deprecated_ __attribute__ ((deprecated))
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#define _packed_ __attribute__ ((packed))
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#define _malloc_ __attribute__ ((malloc))
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#define _weak_ __attribute__ ((weak))
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#define _likely_(x) (__builtin_expect(!!(x), 1))
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#define _unlikely_(x) (__builtin_expect(!!(x), 0))
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#define _public_ __attribute__ ((visibility("default")))
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#define _hidden_ __attribute__ ((visibility("hidden")))
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#define _weakref_(x) __attribute__((weakref(#x)))
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#define _alignas_(x) __attribute__((aligned(__alignof(x))))
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#define _cleanup_(x) __attribute__((cleanup(x)))
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#if __GNUC__ >= 7
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#define _fallthrough_ __attribute__((fallthrough))
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#else
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#define _fallthrough_
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#endif
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/* Define C11 noreturn without <stdnoreturn.h> and even on older gcc
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* compiler versions */
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#ifndef _noreturn_
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#if __STDC_VERSION__ >= 201112L
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#define _noreturn_ _Noreturn
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#else
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#define _noreturn_ __attribute__((noreturn))
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#endif
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#endif
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#if !defined(HAS_FEATURE_MEMORY_SANITIZER)
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# if defined(__has_feature)
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# if __has_feature(memory_sanitizer)
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# define HAS_FEATURE_MEMORY_SANITIZER 1
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# endif
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# endif
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# if !defined(HAS_FEATURE_MEMORY_SANITIZER)
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# define HAS_FEATURE_MEMORY_SANITIZER 0
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# endif
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#endif
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/* Temporarily disable some warnings */
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#define DISABLE_WARNING_FORMAT_NONLITERAL \
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_Pragma("GCC diagnostic push"); \
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_Pragma("GCC diagnostic ignored \"-Wformat-nonliteral\"")
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#define DISABLE_WARNING_MISSING_PROTOTYPES \
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_Pragma("GCC diagnostic push"); \
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_Pragma("GCC diagnostic ignored \"-Wmissing-prototypes\"")
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#define DISABLE_WARNING_NONNULL \
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_Pragma("GCC diagnostic push"); \
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_Pragma("GCC diagnostic ignored \"-Wnonnull\"")
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#define DISABLE_WARNING_SHADOW \
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_Pragma("GCC diagnostic push"); \
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_Pragma("GCC diagnostic ignored \"-Wshadow\"")
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#define DISABLE_WARNING_INCOMPATIBLE_POINTER_TYPES \
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_Pragma("GCC diagnostic push"); \
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_Pragma("GCC diagnostic ignored \"-Wincompatible-pointer-types\"")
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#define REENABLE_WARNING \
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_Pragma("GCC diagnostic pop")
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/* automake test harness */
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#define EXIT_TEST_SKIP 77
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#define XSTRINGIFY(x) #x
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#define STRINGIFY(x) XSTRINGIFY(x)
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#define XCONCATENATE(x, y) x ## y
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#define CONCATENATE(x, y) XCONCATENATE(x, y)
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#define UNIQ_T(x, uniq) CONCATENATE(__unique_prefix_, CONCATENATE(x, uniq))
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#define UNIQ __COUNTER__
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/* builtins */
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#if __SIZEOF_INT__ == 4
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#define BUILTIN_FFS_U32(x) __builtin_ffs(x);
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#elif __SIZEOF_LONG__ == 4
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#define BUILTIN_FFS_U32(x) __builtin_ffsl(x);
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#else
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#error "neither int nor long are four bytes long?!?"
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#endif
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/* Rounds up */
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#define ALIGN4(l) (((l) + 3) & ~3)
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#define ALIGN8(l) (((l) + 7) & ~7)
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#if __SIZEOF_POINTER__ == 8
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#define ALIGN(l) ALIGN8(l)
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#elif __SIZEOF_POINTER__ == 4
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#define ALIGN(l) ALIGN4(l)
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#else
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#error "Wut? Pointers are neither 4 nor 8 bytes long?"
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#endif
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#define ALIGN_PTR(p) ((void*) ALIGN((unsigned long) (p)))
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#define ALIGN4_PTR(p) ((void*) ALIGN4((unsigned long) (p)))
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#define ALIGN8_PTR(p) ((void*) ALIGN8((unsigned long) (p)))
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static inline size_t ALIGN_TO(size_t l, size_t ali) {
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return ((l + ali - 1) & ~(ali - 1));
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}
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#define ALIGN_TO_PTR(p, ali) ((void*) ALIGN_TO((unsigned long) (p), (ali)))
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/* align to next higher power-of-2 (except for: 0 => 0, overflow => 0) */
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static inline unsigned long ALIGN_POWER2(unsigned long u) {
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/* clz(0) is undefined */
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if (u == 1)
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return 1;
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/* left-shift overflow is undefined */
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if (__builtin_clzl(u - 1UL) < 1)
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return 0;
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return 1UL << (sizeof(u) * 8 - __builtin_clzl(u - 1UL));
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}
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#ifndef __COVERITY__
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# define VOID_0 ((void)0)
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#else
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# define VOID_0 ((void*)0)
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#endif
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#define ELEMENTSOF(x) \
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(__builtin_choose_expr( \
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!__builtin_types_compatible_p(typeof(x), typeof(&*(x))), \
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sizeof(x)/sizeof((x)[0]), \
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VOID_0))
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/*
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* STRLEN - return the length of a string literal, minus the trailing NUL byte.
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* Contrary to strlen(), this is a constant expression.
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* @x: a string literal.
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*/
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#define STRLEN(x) (sizeof(""x"") - 1)
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/*
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* container_of - cast a member of a structure out to the containing structure
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* @ptr: the pointer to the member.
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* @type: the type of the container struct this is embedded in.
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* @member: the name of the member within the struct.
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*/
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#define container_of(ptr, type, member) __container_of(UNIQ, (ptr), type, member)
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#define __container_of(uniq, ptr, type, member) \
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({ \
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const typeof( ((type*)0)->member ) *UNIQ_T(A, uniq) = (ptr); \
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(type*)( (char *)UNIQ_T(A, uniq) - offsetof(type, member) ); \
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})
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#undef MAX
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#define MAX(a, b) __MAX(UNIQ, (a), UNIQ, (b))
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#define __MAX(aq, a, bq, b) \
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({ \
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const typeof(a) UNIQ_T(A, aq) = (a); \
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const typeof(b) UNIQ_T(B, bq) = (b); \
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UNIQ_T(A, aq) > UNIQ_T(B, bq) ? UNIQ_T(A, aq) : UNIQ_T(B, bq); \
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})
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/* evaluates to (void) if _A or _B are not constant or of different types */
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#define CONST_MAX(_A, _B) \
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(__builtin_choose_expr( \
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__builtin_constant_p(_A) && \
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__builtin_constant_p(_B) && \
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__builtin_types_compatible_p(typeof(_A), typeof(_B)), \
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((_A) > (_B)) ? (_A) : (_B), \
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VOID_0))
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/* takes two types and returns the size of the larger one */
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#define MAXSIZE(A, B) (sizeof(union _packed_ { typeof(A) a; typeof(B) b; }))
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#define MAX3(x, y, z) \
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({ \
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const typeof(x) _c = MAX(x, y); \
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MAX(_c, z); \
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})
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#undef MIN
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#define MIN(a, b) __MIN(UNIQ, (a), UNIQ, (b))
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#define __MIN(aq, a, bq, b) \
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({ \
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const typeof(a) UNIQ_T(A, aq) = (a); \
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const typeof(b) UNIQ_T(B, bq) = (b); \
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UNIQ_T(A, aq) < UNIQ_T(B, bq) ? UNIQ_T(A, aq) : UNIQ_T(B, bq); \
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})
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#define MIN3(x, y, z) \
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({ \
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const typeof(x) _c = MIN(x, y); \
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MIN(_c, z); \
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})
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#define LESS_BY(a, b) __LESS_BY(UNIQ, (a), UNIQ, (b))
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#define __LESS_BY(aq, a, bq, b) \
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({ \
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const typeof(a) UNIQ_T(A, aq) = (a); \
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const typeof(b) UNIQ_T(B, bq) = (b); \
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UNIQ_T(A, aq) > UNIQ_T(B, bq) ? UNIQ_T(A, aq) - UNIQ_T(B, bq) : 0; \
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})
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#define CMP(a, b) __CMP(UNIQ, (a), UNIQ, (b))
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#define __CMP(aq, a, bq, b) \
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({ \
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const typeof(a) UNIQ_T(A, aq) = (a); \
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const typeof(b) UNIQ_T(B, bq) = (b); \
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UNIQ_T(A, aq) < UNIQ_T(B, bq) ? -1 : \
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UNIQ_T(A, aq) > UNIQ_T(B, bq) ? 1 : 0; \
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})
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#undef CLAMP
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#define CLAMP(x, low, high) __CLAMP(UNIQ, (x), UNIQ, (low), UNIQ, (high))
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#define __CLAMP(xq, x, lowq, low, highq, high) \
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({ \
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const typeof(x) UNIQ_T(X, xq) = (x); \
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const typeof(low) UNIQ_T(LOW, lowq) = (low); \
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const typeof(high) UNIQ_T(HIGH, highq) = (high); \
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UNIQ_T(X, xq) > UNIQ_T(HIGH, highq) ? \
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UNIQ_T(HIGH, highq) : \
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UNIQ_T(X, xq) < UNIQ_T(LOW, lowq) ? \
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UNIQ_T(LOW, lowq) : \
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UNIQ_T(X, xq); \
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})
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/* [(x + y - 1) / y] suffers from an integer overflow, even though the
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* computation should be possible in the given type. Therefore, we use
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* [x / y + !!(x % y)]. Note that on "Real CPUs" a division returns both the
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* quotient and the remainder, so both should be equally fast. */
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#define DIV_ROUND_UP(_x, _y) \
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({ \
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const typeof(_x) __x = (_x); \
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const typeof(_y) __y = (_y); \
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(__x / __y + !!(__x % __y)); \
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})
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#ifdef __COVERITY__
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/* Use special definitions of assertion macros in order to prevent
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* false positives of ASSERT_SIDE_EFFECT on Coverity static analyzer
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* for uses of assert_se() and assert_return().
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*
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* These definitions make expression go through a (trivial) function
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* call to ensure they are not discarded. Also use ! or !! to ensure
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* the boolean expressions are seen as such.
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*
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* This technique has been described and recommended in:
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* https://community.synopsys.com/s/question/0D534000046Yuzb/suppressing-assertsideeffect-for-functions-that-allow-for-sideeffects
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*/
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extern void __coverity_panic__(void);
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static inline int __coverity_check__(int condition) {
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return condition;
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}
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#define assert_message_se(expr, message) \
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do { \
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if (__coverity_check__(!(expr))) \
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__coverity_panic__(); \
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} while (false)
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#define assert_log(expr, message) __coverity_check__(!!(expr))
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#else /* ! __COVERITY__ */
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#define assert_message_se(expr, message) \
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do { \
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if (_unlikely_(!(expr))) \
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log_assert_failed(message, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
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} while (false)
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#define assert_log(expr, message) ((_likely_(expr)) \
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? (true) \
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: (log_assert_failed_return(message, __FILE__, __LINE__, __PRETTY_FUNCTION__), false))
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#endif /* __COVERITY__ */
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#define assert_se(expr) assert_message_se(expr, #expr)
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/* We override the glibc assert() here. */
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#undef assert
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#ifdef NDEBUG
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#define assert(expr) do {} while (false)
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#else
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#define assert(expr) assert_message_se(expr, #expr)
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#endif
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#define assert_not_reached(t) \
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do { \
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log_assert_failed_unreachable(t, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
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} while (false)
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#if defined(static_assert)
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#define assert_cc(expr) \
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static_assert(expr, #expr);
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#else
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#define assert_cc(expr) \
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struct CONCATENATE(_assert_struct_, __COUNTER__) { \
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char x[(expr) ? 0 : -1]; \
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};
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#endif
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#define assert_return(expr, r) \
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do { \
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if (!assert_log(expr, #expr)) \
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return (r); \
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} while (false)
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#define assert_return_errno(expr, r, err) \
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do { \
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if (!assert_log(expr, #expr)) { \
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errno = err; \
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return (r); \
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} \
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} while (false)
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#define PTR_TO_INT(p) ((int) ((intptr_t) (p)))
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#define INT_TO_PTR(u) ((void *) ((intptr_t) (u)))
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#define PTR_TO_UINT(p) ((unsigned) ((uintptr_t) (p)))
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#define UINT_TO_PTR(u) ((void *) ((uintptr_t) (u)))
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#define PTR_TO_LONG(p) ((long) ((intptr_t) (p)))
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#define LONG_TO_PTR(u) ((void *) ((intptr_t) (u)))
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#define PTR_TO_ULONG(p) ((unsigned long) ((uintptr_t) (p)))
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#define ULONG_TO_PTR(u) ((void *) ((uintptr_t) (u)))
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#define PTR_TO_INT32(p) ((int32_t) ((intptr_t) (p)))
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#define INT32_TO_PTR(u) ((void *) ((intptr_t) (u)))
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#define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p)))
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#define UINT32_TO_PTR(u) ((void *) ((uintptr_t) (u)))
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#define PTR_TO_INT64(p) ((int64_t) ((intptr_t) (p)))
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#define INT64_TO_PTR(u) ((void *) ((intptr_t) (u)))
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#define PTR_TO_UINT64(p) ((uint64_t) ((uintptr_t) (p)))
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#define UINT64_TO_PTR(u) ((void *) ((uintptr_t) (u)))
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#define PTR_TO_SIZE(p) ((size_t) ((uintptr_t) (p)))
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#define SIZE_TO_PTR(u) ((void *) ((uintptr_t) (u)))
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#define CHAR_TO_STR(x) ((char[2]) { x, 0 })
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#define char_array_0(x) x[sizeof(x)-1] = 0;
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/* Returns the number of chars needed to format variables of the
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* specified type as a decimal string. Adds in extra space for a
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* negative '-' prefix (hence works correctly on signed
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* types). Includes space for the trailing NUL. */
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#define DECIMAL_STR_MAX(type) \
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(2+(sizeof(type) <= 1 ? 3 : \
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sizeof(type) <= 2 ? 5 : \
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sizeof(type) <= 4 ? 10 : \
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sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)])))
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#define DECIMAL_STR_WIDTH(x) \
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({ \
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typeof(x) _x_ = (x); \
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unsigned ans = 1; \
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while ((_x_ /= 10) != 0) \
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ans++; \
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ans; \
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})
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#define SET_FLAG(v, flag, b) \
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(v) = (b) ? ((v) | (flag)) : ((v) & ~(flag))
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#define FLAGS_SET(v, flags) \
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(((v) & (flags)) == (flags))
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#define CASE_F(X) case X:
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#define CASE_F_1(CASE, X) CASE_F(X)
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#define CASE_F_2(CASE, X, ...) CASE(X) CASE_F_1(CASE, __VA_ARGS__)
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#define CASE_F_3(CASE, X, ...) CASE(X) CASE_F_2(CASE, __VA_ARGS__)
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#define CASE_F_4(CASE, X, ...) CASE(X) CASE_F_3(CASE, __VA_ARGS__)
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#define CASE_F_5(CASE, X, ...) CASE(X) CASE_F_4(CASE, __VA_ARGS__)
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#define CASE_F_6(CASE, X, ...) CASE(X) CASE_F_5(CASE, __VA_ARGS__)
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#define CASE_F_7(CASE, X, ...) CASE(X) CASE_F_6(CASE, __VA_ARGS__)
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#define CASE_F_8(CASE, X, ...) CASE(X) CASE_F_7(CASE, __VA_ARGS__)
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#define CASE_F_9(CASE, X, ...) CASE(X) CASE_F_8(CASE, __VA_ARGS__)
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#define CASE_F_10(CASE, X, ...) CASE(X) CASE_F_9(CASE, __VA_ARGS__)
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#define CASE_F_11(CASE, X, ...) CASE(X) CASE_F_10(CASE, __VA_ARGS__)
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#define CASE_F_12(CASE, X, ...) CASE(X) CASE_F_11(CASE, __VA_ARGS__)
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#define CASE_F_13(CASE, X, ...) CASE(X) CASE_F_12(CASE, __VA_ARGS__)
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#define CASE_F_14(CASE, X, ...) CASE(X) CASE_F_13(CASE, __VA_ARGS__)
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#define CASE_F_15(CASE, X, ...) CASE(X) CASE_F_14(CASE, __VA_ARGS__)
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#define CASE_F_16(CASE, X, ...) CASE(X) CASE_F_15(CASE, __VA_ARGS__)
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#define CASE_F_17(CASE, X, ...) CASE(X) CASE_F_16(CASE, __VA_ARGS__)
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#define CASE_F_18(CASE, X, ...) CASE(X) CASE_F_17(CASE, __VA_ARGS__)
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#define CASE_F_19(CASE, X, ...) CASE(X) CASE_F_18(CASE, __VA_ARGS__)
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#define CASE_F_20(CASE, X, ...) CASE(X) CASE_F_19(CASE, __VA_ARGS__)
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#define GET_CASE_F(_1,_2,_3,_4,_5,_6,_7,_8,_9,_10,_11,_12,_13,_14,_15,_16,_17,_18,_19,_20,NAME,...) NAME
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#define FOR_EACH_MAKE_CASE(...) \
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GET_CASE_F(__VA_ARGS__,CASE_F_20,CASE_F_19,CASE_F_18,CASE_F_17,CASE_F_16,CASE_F_15,CASE_F_14,CASE_F_13,CASE_F_12,CASE_F_11, \
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CASE_F_10,CASE_F_9,CASE_F_8,CASE_F_7,CASE_F_6,CASE_F_5,CASE_F_4,CASE_F_3,CASE_F_2,CASE_F_1) \
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(CASE_F,__VA_ARGS__)
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#define IN_SET(x, ...) \
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({ \
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bool _found = false; \
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/* If the build breaks in the line below, you need to extend the case macros. (We use "long double" as \
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* type for the array, in the hope that checkers such as ubsan don't complain that the initializers for \
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* the array are not representable by the base type. Ideally we'd use typeof(x) as base type, but that \
|
|
* doesn't work, as we want to use this on bitfields and gcc refuses typeof() on bitfields.) */ \
|
|
assert_cc((sizeof((long double[]){__VA_ARGS__})/sizeof(long double)) <= 20); \
|
|
switch(x) { \
|
|
FOR_EACH_MAKE_CASE(__VA_ARGS__) \
|
|
_found = true; \
|
|
break; \
|
|
default: \
|
|
break; \
|
|
} \
|
|
_found; \
|
|
})
|
|
|
|
#define SWAP_TWO(x, y) do { \
|
|
typeof(x) _t = (x); \
|
|
(x) = (y); \
|
|
(y) = (_t); \
|
|
} while (false)
|
|
|
|
/* 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 DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \
|
|
static inline void func##p(type *p) { \
|
|
if (*p) \
|
|
func(*p); \
|
|
}
|
|
|
|
#define _DEFINE_TRIVIAL_REF_FUNC(type, name, scope) \
|
|
scope type *name##_ref(type *p) { \
|
|
if (!p) \
|
|
return NULL; \
|
|
\
|
|
assert(p->n_ref > 0); \
|
|
p->n_ref++; \
|
|
return p; \
|
|
}
|
|
|
|
#define _DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func, scope) \
|
|
scope type *name##_unref(type *p) { \
|
|
if (!p) \
|
|
return NULL; \
|
|
\
|
|
assert(p->n_ref > 0); \
|
|
p->n_ref--; \
|
|
if (p->n_ref > 0) \
|
|
return NULL; \
|
|
\
|
|
return free_func(p); \
|
|
}
|
|
|
|
#define DEFINE_TRIVIAL_REF_FUNC(type, name) \
|
|
_DEFINE_TRIVIAL_REF_FUNC(type, name,)
|
|
#define DEFINE_PRIVATE_TRIVIAL_REF_FUNC(type, name) \
|
|
_DEFINE_TRIVIAL_REF_FUNC(type, name, static)
|
|
#define DEFINE_PUBLIC_TRIVIAL_REF_FUNC(type, name) \
|
|
_DEFINE_TRIVIAL_REF_FUNC(type, name, _public_)
|
|
|
|
#define DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func) \
|
|
_DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func,)
|
|
#define DEFINE_PRIVATE_TRIVIAL_UNREF_FUNC(type, name, free_func) \
|
|
_DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func, static)
|
|
#define DEFINE_PUBLIC_TRIVIAL_UNREF_FUNC(type, name, free_func) \
|
|
_DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func, _public_)
|
|
|
|
#define DEFINE_TRIVIAL_REF_UNREF_FUNC(type, name, free_func) \
|
|
DEFINE_TRIVIAL_REF_FUNC(type, name); \
|
|
DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func);
|
|
|
|
#define DEFINE_PRIVATE_TRIVIAL_REF_UNREF_FUNC(type, name, free_func) \
|
|
DEFINE_PRIVATE_TRIVIAL_REF_FUNC(type, name); \
|
|
DEFINE_PRIVATE_TRIVIAL_UNREF_FUNC(type, name, free_func);
|
|
|
|
#define DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(type, name, free_func) \
|
|
DEFINE_PUBLIC_TRIVIAL_REF_FUNC(type, name); \
|
|
DEFINE_PUBLIC_TRIVIAL_UNREF_FUNC(type, name, free_func);
|
|
|
|
#include "log.h"
|