[ViewVC] Diff of: cvs/libecb/ecb.h

Comparing libecb/ecb.h (file contents):
Revision 1.23 by root, Thu May 26 19:40:09 2011 UTC vs.
Revision 1.93 by root, Tue May 29 19:10:50 2012 UTC

…		…
1	/*	1	/*
2	* libecb - http://software.schmorp.de/pkg/libecb	2	* libecb - http://software.schmorp.de/pkg/libecb
3	*	3	*
4	* Copyright (©) 2009-2011 Marc Alexander Lehmann	4	* Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
5	* Copyright (©) 2011 Emanuele Giaquinta	5	* Copyright (©) 2011 Emanuele Giaquinta
6	* All rights reserved.	6	* All rights reserved.
7	*	7	*
8	* Redistribution and use in source and binary forms, with or without modifica-	8	* Redistribution and use in source and binary forms, with or without modifica-
9	* tion, are permitted provided that the following conditions are met:	9	* tion, are permitted provided that the following conditions are met:
28	*/	28	*/
29		29
30	#ifndef ECB_H	30	#ifndef ECB_H
31	#define ECB_H	31	#define ECB_H
32		32
		33	/* 16 bits major, 16 bits minor */
		34	#define ECB_VERSION 0x00010001
		35
		36	#ifdef _WIN32
		37	typedef signed char int8_t;
		38	typedef unsigned char uint8_t;
		39	typedef signed short int16_t;
		40	typedef unsigned short uint16_t;
		41	typedef signed int int32_t;
		42	typedef unsigned int uint32_t;
		43	#if __GNUC__
		44	typedef signed long long int64_t;
		45	typedef unsigned long long uint64_t;
		46	#else /* _MSC_VER \|\| __BORLANDC__ */
		47	typedef signed __int64 int64_t;
		48	typedef unsigned __int64 uint64_t;
		49	#endif
		50	#ifdef _WIN64
		51	#define ECB_PTRSIZE 8
		52	typedef uint64_t uintptr_t;
		53	typedef int64_t intptr_t;
		54	#else
		55	#define ECB_PTRSIZE 4
		56	typedef uint32_t uintptr_t;
		57	typedef int32_t intptr_t;
		58	#endif
		59	typedef intptr_t ptrdiff_t;
		60	#else
33	#include <inttypes.h>	61	#include <inttypes.h>
		62	#if UINTMAX_MAX > 0xffffffffU
		63	#define ECB_PTRSIZE 8
		64	#else
		65	#define ECB_PTRSIZE 4
		66	#endif
		67	#endif
34		68
35	/* many compilers define _GNUC_ to some versions but then only implement	69	/* many compilers define _GNUC_ to some versions but then only implement
36	* what their idiot authors think are the "more important" extensions,	70	* what their idiot authors think are the "more important" extensions,
37	* causing enourmous grief in return for some better fake benchmark numbers.	71	* causing enormous grief in return for some better fake benchmark numbers.
38	* or so.	72	* or so.
39	* we try to detect these and simply assume they are not gcc - if they have	73	* we try to detect these and simply assume they are not gcc - if they have
40	* an issue with that they should have done it right in the first place.	74	* an issue with that they should have done it right in the first place.
41	*/	75	*/
42	#ifndef ECB_GCC_VERSION	76	#ifndef ECB_GCC_VERSION
43	# if defined(__INTEL_COMPILER) \|\| defined(__SUNPRO_C) \|\| defined(__llvm__)	77	#if !defined __GNUC_MINOR__ \|\| defined __INTEL_COMPILER \|\| defined __SUNPRO_C \|\| defined __SUNPRO_CC \|\| defined __llvm__ \|\| defined __clang__
44	# define ECB_GCC_VERSION(major,minor) 0	78	#define ECB_GCC_VERSION(major,minor) 0
45	# else	79	#else
46	# define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))	80	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
		81	#endif
47	# endif	82	#endif
		83
		84	#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
		85	#define ECB_C99 (__STDC_VERSION__ >= 199901L)
		86	#define ECB_C11 (__STDC_VERSION__ >= 201112L)
		87	#define ECB_CPP (__cplusplus+0)
		88	#define ECB_CPP98 (__cplusplus >= 199711L)
		89	#define ECB_CPP11 (__cplusplus >= 201103L)
		90
		91	/*****************************************************************************/
		92
		93	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
		94	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
		95
		96	#if ECB_NO_THREADS
		97	# define ECB_NO_SMP 1
		98	#endif
		99
		100	#if ECB_NO_SMP
		101	#define ECB_MEMORY_FENCE do { } while (0)
		102	#endif
		103
		104	#ifndef ECB_MEMORY_FENCE
		105	#if ECB_C11 && !defined __STDC_NO_ATOMICS__
		106	/* we assume that these memory fences work on all variables/all memory accesses, */
		107	/* not just C11 atomics and atomic accesses */
		108	#include <stdatomic.h>
		109	#if 0
		110	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_acq_rel)
		111	#define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
		112	#define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
		113	#else
		114	/* the above should be enough in my book, but after experiences with gcc-4.7 */
		115	/* and clang, better play safe */
		116	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
		117	#endif
48	#endif	118	#endif
		119	#endif
49		120
		121	#ifndef ECB_MEMORY_FENCE
		122	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
		123	#if __i386 \|\| __i386__
		124	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
		125	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
		126	#define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
		127	#elif __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__
		128	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
		129	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
		130	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
		131	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
		132	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		133	#elif defined __ARM_ARCH_6__ \|\| defined __ARM_ARCH_6J__ \
		134	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__
		135	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
		136	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
		137	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__
		138	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
		139	#elif __sparc \|\| __sparc__
		140	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad \| " : : : "memory")
		141	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
		142	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
		143	#elif defined __s390__ \|\| defined __s390x__
		144	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
		145	#elif defined __mips__
		146	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		147	#elif defined __alpha__
		148	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
		149	#endif
		150	#endif
		151	#endif
		152
		153	#ifndef ECB_MEMORY_FENCE
		154	#if ECB_GCC_VERSION(4,7)
		155	/* unsolved mystery: ACQ_REL should be enough, but doesn't generate any code */
		156	/* which in turn actually breaks libev */
		157	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
		158	#elif defined __clang && __has_feature (cxx_atomic)
		159	/* see above */
		160	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
		161	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
		162	#define ECB_MEMORY_FENCE __sync_synchronize ()
		163	/#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) /
		164	/#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) /
		165	#elif _MSC_VER >= 1400 /* VC++ 2005 */
		166	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		167	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
		168	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
		169	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
		170	#elif defined _WIN32
		171	#include <WinNT.h>
		172	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
		173	#elif __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
		174	#include <mbarrier.h>
		175	#define ECB_MEMORY_FENCE __machine_rw_barrier ()
		176	#define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
		177	#define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
		178	#elif __xlC__
		179	#define ECB_MEMORY_FENCE __sync ()
		180	#endif
		181	#endif
		182
		183	#ifndef ECB_MEMORY_FENCE
		184	#if !ECB_AVOID_PTHREADS
		185	/*
		186	* if you get undefined symbol references to pthread_mutex_lock,
		187	* or failure to find pthread.h, then you should implement
		188	* the ECB_MEMORY_FENCE operations for your cpu/compiler
		189	* OR provide pthread.h and link against the posix thread library
		190	* of your system.
		191	*/
		192	#include <pthread.h>
		193	#define ECB_NEEDS_PTHREADS 1
		194	#define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
		195
		196	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		197	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		198	#endif
		199	#endif
		200
		201	#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
		202	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		203	#endif
		204
		205	#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
		206	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		207	#endif
		208
		209	/*****************************************************************************/
		210
50	#ifndef __cplusplus	211	#if __cplusplus
51	# if __STDC_VERSION__ >= 199901L	212	#define ecb_inline static inline
52	# define ECB_INLINE inline	213	#elif ECB_GCC_VERSION(2,5)
53	typedef _Bool ecb_bool;	214	#define ecb_inline static __inline__
		215	#elif ECB_C99
		216	#define ecb_inline static inline
54	# else	217	#else
55	# define ECB_INLINE inline /* yeah! */	218	#define ecb_inline static
		219	#endif
		220
		221	#if ECB_GCC_VERSION(3,3)
		222	#define ecb_restrict __restrict__
		223	#elif ECB_C99
		224	#define ecb_restrict restrict
		225	#else
		226	#define ecb_restrict
		227	#endif
		228
56	typedef int ecb_bool;	229	typedef int ecb_bool;
57	# endif
58	#endif
59		230
60	#define ECB_CONCAT_(a, b) a ## b	231	#define ECB_CONCAT_(a, b) a ## b
61	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	232	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
62	#define ECB_STRINGIFY_(a) # a	233	#define ECB_STRINGIFY_(a) # a
63	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	234	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
64		235
65	#define ECB_HEADER_INLINE static ECB_INLINE	236	#define ecb_function_ ecb_inline
66		237
67	#if ECB_GCC_VERSION(3,1)	238	#if ECB_GCC_VERSION(3,1)
68	# define ecb_attribute(attrlist) __attribute__(attrlist)	239	#define ecb_attribute(attrlist) __attribute__(attrlist)
69	# define ecb_is_constant(expr) __builtin_constant_p (expr)	240	#define ecb_is_constant(expr) __builtin_constant_p (expr)
70	# define ecb_expect(expr,value) __builtin_expect ((expr),(value))	241	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
71	# define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	242	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
72	#else	243	#else
73	# define ecb_attribute(attrlist)	244	#define ecb_attribute(attrlist)
74	# define ecb_is_constant(expr) 0	245	#define ecb_is_constant(expr) 0
75	# define ecb_expect(expr,value) (expr)	246	#define ecb_expect(expr,value) (expr)
76	# define ecb_prefetch(addr,rw,locality)	247	#define ecb_prefetch(addr,rw,locality)
77	#endif	248	#endif
78		249
79	/* no emulation for ecb_decltype */	250	/* no emulation for ecb_decltype */
80	#if ECB_GCC_VERSION(4,5)	251	#if ECB_GCC_VERSION(4,5)
81	# define ecb_decltype(x) __decltype(x)	252	#define ecb_decltype(x) __decltype(x)
82	#elif ECB_GCC_VERSION(3,0)	253	#elif ECB_GCC_VERSION(3,0)
83	# define ecb_decltype(x) typeof(x)	254	#define ecb_decltype(x) __typeof(x)
84	#endif	255	#endif
85		256
86	#define ecb_noinline ecb_attribute ((noinline))	257	#define ecb_noinline ecb_attribute ((__noinline__))
87	#define ecb_noreturn ecb_attribute ((noreturn))
88	#define ecb_unused ecb_attribute ((unused))	258	#define ecb_unused ecb_attribute ((__unused__))
89	#define ecb_const ecb_attribute ((const))	259	#define ecb_const ecb_attribute ((__const__))
90	#define ecb_pure ecb_attribute ((pure))	260	#define ecb_pure ecb_attribute ((__pure__))
		261
		262	#if ECB_C11
		263	#define ecb_noreturn _Noreturn
		264	#else
		265	#define ecb_noreturn ecb_attribute ((__noreturn__))
		266	#endif
		267
		268	#if ECB_GCC_VERSION(4,3)
		269	#define ecb_artificial ecb_attribute ((__artificial__))
91	#define ecb_hot ecb_attribute ((hot)) /* 4.3 */	270	#define ecb_hot ecb_attribute ((__hot__))
92	#define ecb_cold ecb_attribute ((cold)) /* 4.3 */	271	#define ecb_cold ecb_attribute ((__cold__))
		272	#else
		273	#define ecb_artificial
		274	#define ecb_hot
		275	#define ecb_cold
		276	#endif
93		277
94	/* put into if's if you are very sure that the expression */	278	/* put around conditional expressions if you are very sure that the */
95	/* is mostly true or mosty false. note that these return */	279	/* expression is mostly true or mostly false. note that these return */
96	/* booleans, not the expression. */	280	/* booleans, not the expression. */
97	#define ecb_unlikely(expr) ecb_expect (!!(expr), 0)	281	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
		282	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		283	/* for compatibility to the rest of the world */
98	#define ecb_likely(expr) ecb_expect (!!(expr), 1)	284	#define ecb_likely(expr) ecb_expect_true (expr)
		285	#define ecb_unlikely(expr) ecb_expect_false (expr)
		286
		287	/* count trailing zero bits and count # of one bits */
		288	#if ECB_GCC_VERSION(3,4)
		289	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
		290	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
		291	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
		292	#define ecb_ctz32(x) __builtin_ctz (x)
		293	#define ecb_ctz64(x) __builtin_ctzll (x)
		294	#define ecb_popcount32(x) __builtin_popcount (x)
		295	/* no popcountll */
		296	#else
		297	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
		298	ecb_function_ int
		299	ecb_ctz32 (uint32_t x)
		300	{
		301	int r = 0;
		302
		303	x &= ~x + 1; /* this isolates the lowest bit */
		304
		305	#if ECB_branchless_on_i386
		306	r += !!(x & 0xaaaaaaaa) << 0;
		307	r += !!(x & 0xcccccccc) << 1;
		308	r += !!(x & 0xf0f0f0f0) << 2;
		309	r += !!(x & 0xff00ff00) << 3;
		310	r += !!(x & 0xffff0000) << 4;
		311	#else
		312	if (x & 0xaaaaaaaa) r += 1;
		313	if (x & 0xcccccccc) r += 2;
		314	if (x & 0xf0f0f0f0) r += 4;
		315	if (x & 0xff00ff00) r += 8;
		316	if (x & 0xffff0000) r += 16;
		317	#endif
		318
		319	return r;
		320	}
		321
		322	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
		323	ecb_function_ int
		324	ecb_ctz64 (uint64_t x)
		325	{
		326	int shift = x & 0xffffffffU ? 0 : 32;
		327	return ecb_ctz32 (x >> shift) + shift;
		328	}
		329
		330	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
		331	ecb_function_ int
		332	ecb_popcount32 (uint32_t x)
		333	{
		334	x -= (x >> 1) & 0x55555555;
		335	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
		336	x = ((x >> 4) + x) & 0x0f0f0f0f;
		337	x *= 0x01010101;
		338
		339	return x >> 24;
		340	}
		341
		342	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
		343	ecb_function_ int ecb_ld32 (uint32_t x)
		344	{
		345	int r = 0;
		346
		347	if (x >> 16) { x >>= 16; r += 16; }
		348	if (x >> 8) { x >>= 8; r += 8; }
		349	if (x >> 4) { x >>= 4; r += 4; }
		350	if (x >> 2) { x >>= 2; r += 2; }
		351	if (x >> 1) { r += 1; }
		352
		353	return r;
		354	}
		355
		356	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
		357	ecb_function_ int ecb_ld64 (uint64_t x)
		358	{
		359	int r = 0;
		360
		361	if (x >> 32) { x >>= 32; r += 32; }
		362
		363	return r + ecb_ld32 (x);
		364	}
		365	#endif
		366
		367	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
		368	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
		369	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
		370	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
		371
		372	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
		373	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
		374	{
		375	return ( (x * 0x0802U & 0x22110U)
		376	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
		377	}
		378
		379	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
		380	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
		381	{
		382	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
		383	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
		384	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
		385	x = ( x >> 8 ) \| ( x << 8);
		386
		387	return x;
		388	}
		389
		390	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
		391	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
		392	{
		393	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
		394	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
		395	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
		396	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
		397	x = ( x >> 16 ) \| ( x << 16);
		398
		399	return x;
		400	}
		401
		402	/* popcount64 is only available on 64 bit cpus as gcc builtin */
		403	/* so for this version we are lazy */
		404	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
		405	ecb_function_ int
		406	ecb_popcount64 (uint64_t x)
		407	{
		408	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
		409	}
		410
		411	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
		412	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
		413	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
		414	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
		415	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
		416	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
		417	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
		418	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
		419
		420	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }
		421	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }
		422	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }
		423	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }
		424	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }
		425	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }
		426	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }
		427	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
		428
		429	#if ECB_GCC_VERSION(4,3)
		430	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		431	#define ecb_bswap32(x) __builtin_bswap32 (x)
		432	#define ecb_bswap64(x) __builtin_bswap64 (x)
		433	#else
		434	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
		435	ecb_function_ uint16_t
		436	ecb_bswap16 (uint16_t x)
		437	{
		438	return ecb_rotl16 (x, 8);
		439	}
		440
		441	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
		442	ecb_function_ uint32_t
		443	ecb_bswap32 (uint32_t x)
		444	{
		445	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
		446	}
		447
		448	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
		449	ecb_function_ uint64_t
		450	ecb_bswap64 (uint64_t x)
		451	{
		452	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
		453	}
		454	#endif
		455
		456	#if ECB_GCC_VERSION(4,5)
		457	#define ecb_unreachable() __builtin_unreachable ()
		458	#else
		459	/* this seems to work fine, but gcc always emits a warning for it :/ */
		460	ecb_inline void ecb_unreachable (void) ecb_noreturn;
		461	ecb_inline void ecb_unreachable (void) { }
		462	#endif
99		463
100	/* try to tell the compiler that some condition is definitely true */	464	/* try to tell the compiler that some condition is definitely true */
101	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)	465	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
102		466
103	/* count trailing zero bits and count # of one bits */
104	#if ECB_GCC_VERSION(3,4)
105	#define ecb_ctz32 (x) __builtin_ctz (x)
106	#define ecb_popcount32 (x) __builtin_popcount (x)
107	#else
108	ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const;
109	ECB_HEADER_INLINE
110	ecb_ctz32 (uint32_t x)
111	{
112	int r = 0;
113
114	x &= -x; /* this isolates the lowest bit */
115
116	if (x & 0xaaaaaaaa) r += 1;
117	if (x & 0xcccccccc) r += 2;
118	if (x & 0xf0f0f0f0) r += 4;
119	if (x & 0xff00ff00) r += 8;
120	if (x & 0xffff0000) r += 16;
121
122	return r;
123	}
124
125	ECB_HEADER_INLINE int ecb_popcount32 (uint32_t x) ecb_const;
126	ECB_HEADER_INLINE
127	ecb_popcount32 (uint32_t x)
128	{
129	x -= (x >> 1) & 0x55555555;
130	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
131	x = ((x >> 4) + x) & 0x0f0f0f0f;
132	x *= 0x01010101;
133
134	return x >> 24;
135	}
136	#endif
137
138	#if ECB_GCC_VERSION(4,3)
139	# define ecb_bswap32(x) __builtin_bswap32 (x)
140	# define ecb_bswap16(x) (__builtin_bswap32(x) >> 16)
141	#else
142	ECB_HEADER_INLINE uint32_t ecb_bswap32 (uint32_t x) ecb_const;
143	ECB_HEADER_INLINE uint32_t
144	ecb_bswap32 (uint32_t x)
145	{
146	return (x >> 24)
147	\| ((x >> 8) & 0x0000ff00)
148	\| ((x << 8) & 0x00ff0000)
149	\| (x << 24);
150	}
151
152	ECB_HEADER_INLINE uint32_t ecb_bswap16 (uint32_t x) ecb_const;
153	ECB_HEADER_INLINE uint32_t
154	ecb_bswap16 (uint32_t x)
155	{
156	return ((x >> 8) & 0xff)
157	\| ((x << 8) & 0x00ff0000)
158	\| (x << 24);
159	}
160	#endif
161
162	#if ECB_GCC_VERSION(4,5)
163	# define ecb_unreachable() __builtin_unreachable ()
164	#else
165	/* this seems to work fine, but gcc always emits a warning for it :/ */
166	ECB_HEADER_INLINE void ecb_unreachable (void) ecb_noreturn;
167	ECB_HEADER_INLINE void ecb_unreachable (void) { }
168	#endif
169
170	ECB_HEADER_INLINE unsigned char ecb_byteorder_helper (void) ecb_const;	467	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
171	ECB_HEADER_INLINE unsigned char	468	ecb_inline unsigned char
172	ecb_byteorder_helper (void)	469	ecb_byteorder_helper (void)
173	{	470	{
174	const uint32_t u = 0x11223344;	471	const uint32_t u = 0x11223344;
175	return (unsigned char )&u;	472	return (unsigned char )&u;
176	}	473	}
177		474
178	ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) ecb_const;	475	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
179	ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; };	476	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
180	ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) ecb_const;	477	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
181	ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; };	478	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
182		479
		480	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
		481	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
		482	#else
183	#define ecb_mod(m, n) ((m) < 0 ? ((n) - (-(m) % (n))) : ((m) % (n)))	483	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
		484	#endif
		485
		486	#if __cplusplus
		487	template<typename T>
		488	static inline T ecb_div_rd (T val, T div)
		489	{
		490	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
		491	}
		492	template<typename T>
		493	static inline T ecb_div_ru (T val, T div)
		494	{
		495	return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
		496	}
		497	#else
		498	#define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
		499	#define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
		500	#endif
184		501
185	#if ecb_cplusplus_does_not_suck	502	#if ecb_cplusplus_does_not_suck
186	// does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm)	503	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
187	template<typename T, int N>	504	template<typename T, int N>
188	static inline int ecb_array_length (const T (&arr)[N])	505	static inline int ecb_array_length (const T (&arr)[N])
189	{	506	{
190	return N;	507	return N;
191	}	508	}
192	#else	509	#else
193	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	510	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
194	#endif	511	#endif
195		512
196	ECB_INLINE uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
197	ECB_INLINE uint32_t
198	ecb_rotr32 (uint32_t x, unsigned int count)
199	{
200	return (x << (32 - count)) \| (x >> count);
201	}
202
203	ECB_INLINE uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
204	ECB_INLINE uint32_t
205	ecb_rotl32 (uint32_t x, unsigned int count)
206	{
207	return (x >> (32 - count)) \| (x << count);
208	}
209
210	#endif	513	#endif
211		514

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Comparing libecb/ecb.h (file contents): Revision 1.23 by root, Thu May 26 19:40:09 2011 UTC vs. Revision 1.93 by root, Tue May 29 19:10:50 2012 UTC

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Comparing libecb/ecb.h (file contents):
Revision 1.23 by root, Thu May 26 19:40:09 2011 UTC vs.
Revision 1.93 by root, Tue May 29 19:10:50 2012 UTC