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Comparing libecb/ecb.h (file contents):
Revision 1.49 by root, Fri Jun 17 18:46:19 2011 UTC vs.
Revision 1.198 by root, Sat Jul 31 16:13:30 2021 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 <libecb@schmorp.de>	4	* Copyright (©) 2009-2015,2018-2021 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:
…		…
23	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;	23	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,	24	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-	25	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
26	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED	26	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
27	* OF THE POSSIBILITY OF SUCH DAMAGE.	27	* OF THE POSSIBILITY OF SUCH DAMAGE.
		28	*
		29	* Alternatively, the contents of this file may be used under the terms of
		30	* the GNU General Public License ("GPL") version 2 or any later version,
		31	* in which case the provisions of the GPL are applicable instead of
		32	* the above. If you wish to allow the use of your version of this file
		33	* only under the terms of the GPL and not to allow others to use your
		34	* version of this file under the BSD license, indicate your decision
		35	* by deleting the provisions above and replace them with the notice
		36	* and other provisions required by the GPL. If you do not delete the
		37	* provisions above, a recipient may use your version of this file under
		38	* either the BSD or the GPL.
28	*/	39	*/
29		40
30	#ifndef ECB_H	41	#ifndef ECB_H
31	#define ECB_H	42	#define ECB_H
32		43
33	#ifdef _WIN32	44	/* 16 bits major, 16 bits minor */
		45	#define ECB_VERSION 0x00010009
		46
		47	#include <string.h> /* for memcpy */
		48
		49	#if defined (_WIN32) && !defined (__MINGW32__)
34	typedef signed char int8_t;	50	typedef signed char int8_t;
35	typedef unsigned char uint8_t;	51	typedef unsigned char uint8_t;
		52	typedef signed char int_fast8_t;
		53	typedef unsigned char uint_fast8_t;
36	typedef signed short int16_t;	54	typedef signed short int16_t;
37	typedef unsigned short uint16_t;	55	typedef unsigned short uint16_t;
		56	typedef signed int int_fast16_t;
		57	typedef unsigned int uint_fast16_t;
38	typedef signed int int32_t;	58	typedef signed int int32_t;
39	typedef unsigned int uint32_t;	59	typedef unsigned int uint32_t;
		60	typedef signed int int_fast32_t;
		61	typedef unsigned int uint_fast32_t;
40	#if __GNUC__	62	#if __GNUC__
41	typedef signed long long int64_t;	63	typedef signed long long int64_t;
42	typedef unsigned long long uint64_t;	64	typedef unsigned long long uint64_t;
43	#else	65	#else /* _MSC_VER || __BORLANDC__ */
44	typedef signed __int64 int64_t;	66	typedef signed __int64 int64_t;
45	typedef unsigned __int64 uint64_t;	67	typedef unsigned __int64 uint64_t;
46	#endif	68	#endif
		69	typedef int64_t int_fast64_t;
		70	typedef uint64_t uint_fast64_t;
		71	#ifdef _WIN64
		72	#define ECB_PTRSIZE 8
		73	typedef uint64_t uintptr_t;
		74	typedef int64_t intptr_t;
		75	#else
		76	#define ECB_PTRSIZE 4
		77	typedef uint32_t uintptr_t;
		78	typedef int32_t intptr_t;
		79	#endif
47	#else	80	#else
48	#include <inttypes.h>	81	#include <inttypes.h>
		82	#if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
		83	#define ECB_PTRSIZE 8
		84	#else
		85	#define ECB_PTRSIZE 4
		86	#endif
		87	#endif
		88
		89	#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
		90	#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
		91
		92	#ifndef ECB_OPTIMIZE_SIZE
		93	#if __OPTIMIZE_SIZE__
		94	#define ECB_OPTIMIZE_SIZE 1
		95	#else
		96	#define ECB_OPTIMIZE_SIZE 0
		97	#endif
		98	#endif
		99
		100	/* work around x32 idiocy by defining proper macros */
		101	#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
		102	#if _ILP32
		103	#define ECB_AMD64_X32 1
		104	#else
		105	#define ECB_AMD64 1
		106	#endif
		107	#endif
		108
		109	#if ECB_PTRSIZE >= 8 || ECB_AMD64_X32
		110	#define ECB_64BIT_NATIVE 1
		111	#else
		112	#define ECB_64BIT_NATIVE 0
49	#endif	113	#endif
50		114
51	/* many compilers define _GNUC_ to some versions but then only implement	115	/* many compilers define _GNUC_ to some versions but then only implement
52	* what their idiot authors think are the "more important" extensions,	116	* what their idiot authors think are the "more important" extensions,
53	* causing enourmous grief in return for some better fake benchmark numbers.	117	* causing enormous grief in return for some better fake benchmark numbers.
54	* or so.	118	* or so.
55	* we try to detect these and simply assume they are not gcc - if they have	119	* we try to detect these and simply assume they are not gcc - if they have
56	* an issue with that they should have done it right in the first place.	120	* an issue with that they should have done it right in the first place.
57	*/	121	*/
58	#ifndef ECB_GCC_VERSION
59	#if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__)	122	#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
60	#define ECB_GCC_VERSION(major,minor) 0	123	#define ECB_GCC_VERSION(major,minor) 0
61	#else	124	#else
62	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))	125	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
63	#endif	126	#endif
64	#endif
65		127
		128	#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
		129
		130	#if __clang__ && defined __has_builtin
		131	#define ECB_CLANG_BUILTIN(x) __has_builtin (x)
		132	#else
		133	#define ECB_CLANG_BUILTIN(x) 0
		134	#endif
		135
		136	#if __clang__ && defined __has_extension
		137	#define ECB_CLANG_EXTENSION(x) __has_extension (x)
		138	#else
		139	#define ECB_CLANG_EXTENSION(x) 0
		140	#endif
		141
		142	#define ECB_CPP (__cplusplus+0)
		143	#define ECB_CPP11 (__cplusplus >= 201103L)
		144	#define ECB_CPP14 (__cplusplus >= 201402L)
		145	#define ECB_CPP17 (__cplusplus >= 201703L)
		146
		147	#if ECB_CPP
		148	#define ECB_C 0
		149	#define ECB_STDC_VERSION 0
		150	#else
		151	#define ECB_C 1
		152	#define ECB_STDC_VERSION __STDC_VERSION__
		153	#endif
		154
66	#define ECB_C99 (__STDC_VERSION__ >= 199901L)	155	#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
		156	#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
		157	#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
67		158
68	#if __cplusplus	159	#if ECB_CPP
		160	#define ECB_EXTERN_C extern "C"
		161	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {
		162	#define ECB_EXTERN_C_END }
		163	#else
		164	#define ECB_EXTERN_C extern
		165	#define ECB_EXTERN_C_BEG
		166	#define ECB_EXTERN_C_END
		167	#endif
		168
		169	/*****************************************************************************/
		170
		171	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
		172	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
		173
		174	#if ECB_NO_THREADS
		175	#define ECB_NO_SMP 1
		176	#endif
		177
		178	#if ECB_NO_SMP
		179	#define ECB_MEMORY_FENCE do { } while (0)
		180	#endif
		181
		182	/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
		183	#if __xlC__ && ECB_CPP
		184	#include <builtins.h>
		185	#endif
		186
		187	#if 1400 <= _MSC_VER
		188	#include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
		189	#endif
		190
		191	#ifndef ECB_MEMORY_FENCE
		192	#if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
		193	#define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
		194	#if __i386 || __i386__
		195	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
		196	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
		197	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
		198	#elif ECB_GCC_AMD64
		199	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
		200	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
		201	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
		202	#elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
		203	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		204	#elif defined __ARM_ARCH_2__ \
		205	|| defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
		206	|| defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
		207	|| defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
		208	|| defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
		209	|| defined __ARM_ARCH_5TEJ__
		210	/* should not need any, unless running old code on newer cpu - arm doesn't support that */
		211	#elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
		212	|| defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
		213	|| defined __ARM_ARCH_6T2__
		214	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
		215	#elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
		216	|| defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
		217	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
		218	#elif __aarch64__
		219	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
		220	#elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
		221	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
		222	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
		223	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
		224	#elif defined __s390__ || defined __s390x__
		225	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
		226	#elif defined __mips__
		227	/* GNU/Linux emulates sync on mips1 architectures, so we force its use */
		228	/* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
		229	#define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
		230	#elif defined __alpha__
		231	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
		232	#elif defined __hppa__
		233	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		234	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
		235	#elif defined __ia64__
		236	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
		237	#elif defined __m68k__
		238	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		239	#elif defined __m88k__
		240	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
		241	#elif defined __sh__
		242	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		243	#endif
		244	#endif
		245	#endif
		246
		247	#ifndef ECB_MEMORY_FENCE
		248	#if ECB_GCC_VERSION(4,7)
		249	/* see comment below (stdatomic.h) about the C11 memory model. */
		250	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
		251	#define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
		252	#define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
		253	#undef ECB_MEMORY_FENCE_RELAXED
		254	#define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
		255
		256	#elif ECB_CLANG_EXTENSION(c_atomic)
		257	/* see comment below (stdatomic.h) about the C11 memory model. */
		258	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
		259	#define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
		260	#define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
		261	#undef ECB_MEMORY_FENCE_RELAXED
		262	#define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
		263
		264	#elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
		265	#define ECB_MEMORY_FENCE __sync_synchronize ()
		266	#elif _MSC_VER >= 1500 /* VC++ 2008 */
		267	/* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
		268	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		269	#define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
		270	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
		271	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
		272	#elif _MSC_VER >= 1400 /* VC++ 2005 */
		273	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		274	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
		275	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
		276	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
		277	#elif defined _WIN32
		278	#include <WinNT.h>
		279	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
		280	#elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
		281	#include <mbarrier.h>
		282	#define ECB_MEMORY_FENCE __machine_rw_barrier ()
		283	#define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
		284	#define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
		285	#define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
		286	#elif __xlC__
		287	#define ECB_MEMORY_FENCE __sync ()
		288	#endif
		289	#endif
		290
		291	#ifndef ECB_MEMORY_FENCE
		292	#if ECB_C11 && !defined __STDC_NO_ATOMICS__
		293	/* we assume that these memory fences work on all variables/all memory accesses, */
		294	/* not just C11 atomics and atomic accesses */
		295	#include <stdatomic.h>
		296	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
		297	#define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
		298	#define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
		299	#endif
		300	#endif
		301
		302	#ifndef ECB_MEMORY_FENCE
		303	#if !ECB_AVOID_PTHREADS
		304	/*
		305	* if you get undefined symbol references to pthread_mutex_lock,
		306	* or failure to find pthread.h, then you should implement
		307	* the ECB_MEMORY_FENCE operations for your cpu/compiler
		308	* OR provide pthread.h and link against the posix thread library
		309	* of your system.
		310	*/
		311	#include <pthread.h>
		312	#define ECB_NEEDS_PTHREADS 1
		313	#define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
		314
		315	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		316	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		317	#endif
		318	#endif
		319
		320	#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
		321	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		322	#endif
		323
		324	#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
		325	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		326	#endif
		327
		328	#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
		329	#define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
		330	#endif
		331
		332	/*****************************************************************************/
		333
		334	#if ECB_CPP
69	#define ecb_inline static inline	335	#define ecb_inline static inline
70	#elif ECB_GCC_VERSION(2,5)	336	#elif ECB_GCC_VERSION(2,5)
71	#define ecb_inline static __inline__	337	#define ecb_inline static __inline__
72	#elif ECB_C99	338	#elif ECB_C99
73	#define ecb_inline static inline	339	#define ecb_inline static inline
…		…
87		353
88	#define ECB_CONCAT_(a, b) a ## b	354	#define ECB_CONCAT_(a, b) a ## b
89	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	355	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
90	#define ECB_STRINGIFY_(a) # a	356	#define ECB_STRINGIFY_(a) # a
91	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	357	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
		358	#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
92		359
93	#define ecb_function_ ecb_inline	360	#define ecb_function_ ecb_inline
94		361
95	#if ECB_GCC_VERSION(3,1)	362	#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
96	#define ecb_attribute(attrlist) __attribute__(attrlist)	363	#define ecb_attribute(attrlist) __attribute__ (attrlist)
		364	#else
		365	#define ecb_attribute(attrlist)
		366	#endif
		367
		368	#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
97	#define ecb_is_constant(expr) __builtin_constant_p (expr)	369	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		370	#else
		371	/* possible C11 impl for integral types
		372	typedef struct ecb_is_constant_struct ecb_is_constant_struct;
		373	#define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
		374
		375	#define ecb_is_constant(expr) 0
		376	#endif
		377
		378	#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
98	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))	379	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		380	#else
		381	#define ecb_expect(expr,value) (expr)
		382	#endif
		383
		384	#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
99	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	385	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
100	#else	386	#else
101	#define ecb_attribute(attrlist)
102	#define ecb_is_constant(expr) 0
103	#define ecb_expect(expr,value) (expr)
104	#define ecb_prefetch(addr,rw,locality)	387	#define ecb_prefetch(addr,rw,locality)
105	#endif	388	#endif
106		389
107	/* no emulation for ecb_decltype */	390	/* no emulation for ecb_decltype */
108	#if ECB_GCC_VERSION(4,5)	391	#if ECB_CPP11
		392	// older implementations might have problems with decltype(x)::type, work around it
		393	template<class T> struct ecb_decltype_t { typedef T type; };
109	#define ecb_decltype(x) __decltype(x)	394	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
110	#elif ECB_GCC_VERSION(3,0)	395	#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
111	#define ecb_decltype(x) __typeof(x)	396	#define ecb_decltype(x) __typeof__ (x)
112	#endif	397	#endif
113		398
		399	#if _MSC_VER >= 1300
		400	#define ecb_deprecated __declspec (deprecated)
		401	#else
		402	#define ecb_deprecated ecb_attribute ((__deprecated__))
		403	#endif
		404
		405	#if _MSC_VER >= 1500
		406	#define ecb_deprecated_message(msg) __declspec (deprecated (msg))
		407	#elif ECB_GCC_VERSION(4,5)
		408	#define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
		409	#else
		410	#define ecb_deprecated_message(msg) ecb_deprecated
		411	#endif
		412
		413	#if _MSC_VER >= 1400
		414	#define ecb_noinline __declspec (noinline)
		415	#else
114	#define ecb_noinline ecb_attribute ((__noinline__))	416	#define ecb_noinline ecb_attribute ((__noinline__))
115	#define ecb_noreturn ecb_attribute ((__noreturn__))	417	#endif
		418
116	#define ecb_unused ecb_attribute ((__unused__))	419	#define ecb_unused ecb_attribute ((__unused__))
117	#define ecb_const ecb_attribute ((__const__))	420	#define ecb_const ecb_attribute ((__const__))
118	#define ecb_pure ecb_attribute ((__pure__))	421	#define ecb_pure ecb_attribute ((__pure__))
		422
		423	#if ECB_C11 || __IBMC_NORETURN
		424	/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
		425	#define ecb_noreturn _Noreturn
		426	#elif ECB_CPP11
		427	#define ecb_noreturn [[noreturn]]
		428	#elif _MSC_VER >= 1200
		429	/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
		430	#define ecb_noreturn __declspec (noreturn)
		431	#else
		432	#define ecb_noreturn ecb_attribute ((__noreturn__))
		433	#endif
119		434
120	#if ECB_GCC_VERSION(4,3)	435	#if ECB_GCC_VERSION(4,3)
121	#define ecb_artificial ecb_attribute ((__artificial__))	436	#define ecb_artificial ecb_attribute ((__artificial__))
122	#define ecb_hot ecb_attribute ((__hot__))	437	#define ecb_hot ecb_attribute ((__hot__))
123	#define ecb_cold ecb_attribute ((__cold__))	438	#define ecb_cold ecb_attribute ((__cold__))
…		…
135	/* for compatibility to the rest of the world */	450	/* for compatibility to the rest of the world */
136	#define ecb_likely(expr) ecb_expect_true (expr)	451	#define ecb_likely(expr) ecb_expect_true (expr)
137	#define ecb_unlikely(expr) ecb_expect_false (expr)	452	#define ecb_unlikely(expr) ecb_expect_false (expr)
138		453
139	/* count trailing zero bits and count # of one bits */	454	/* count trailing zero bits and count # of one bits */
140	#if ECB_GCC_VERSION(3,4)	455	#if ECB_GCC_VERSION(3,4) \
		456	|| (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
		457	&& ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
		458	&& ECB_CLANG_BUILTIN(__builtin_popcount))
141	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */	459	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
142	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)	460	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
143	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)	461	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
144	#define ecb_ctz32(x) __builtin_ctz (x)	462	#define ecb_ctz32(x) __builtin_ctz (x)
145	#define ecb_ctz64(x) __builtin_ctzll (x)	463	#define ecb_ctz64(x) __builtin_ctzll (x)
146	#define ecb_popcount32(x) __builtin_popcount (x)	464	#define ecb_popcount32(x) __builtin_popcount (x)
147	/* no popcountll */	465	/* no popcountll */
148	#else	466	#else
149	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;	467	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
150	ecb_function_ int	468	ecb_function_ ecb_const int
151	ecb_ctz32 (uint32_t x)	469	ecb_ctz32 (uint32_t x)
152	{	470	{
		471	#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
		472	unsigned long r;
		473	_BitScanForward (&r, x);
		474	return (int)r;
		475	#else
153	int r = 0;	476	int r = 0;
154		477
155	x &= ~x + 1; /* this isolates the lowest bit */	478	x &= ~x + 1; /* this isolates the lowest bit */
156		479
		480	#if ECB_branchless_on_i386
		481	r += !!(x & 0xaaaaaaaa) << 0;
		482	r += !!(x & 0xcccccccc) << 1;
		483	r += !!(x & 0xf0f0f0f0) << 2;
		484	r += !!(x & 0xff00ff00) << 3;
		485	r += !!(x & 0xffff0000) << 4;
		486	#else
157	if (x & 0xaaaaaaaa) r += 1;	487	if (x & 0xaaaaaaaa) r += 1;
158	if (x & 0xcccccccc) r += 2;	488	if (x & 0xcccccccc) r += 2;
159	if (x & 0xf0f0f0f0) r += 4;	489	if (x & 0xf0f0f0f0) r += 4;
160	if (x & 0xff00ff00) r += 8;	490	if (x & 0xff00ff00) r += 8;
161	if (x & 0xffff0000) r += 16;	491	if (x & 0xffff0000) r += 16;
		492	#endif
162		493
163	return r;	494	return r;
		495	#endif
164	}	496	}
165		497
166	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;	498	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
167	ecb_function_ int	499	ecb_function_ ecb_const int
168	ecb_ctz64 (uint64_t x)	500	ecb_ctz64 (uint64_t x)
169	{	501	{
		502	#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
		503	unsigned long r;
		504	_BitScanForward64 (&r, x);
		505	return (int)r;
		506	#else
170	int shift = x & 0xffffffffU ? 0 : 32;	507	int shift = x & 0xffffffff ? 0 : 32;
171	return ecb_ctz (x >> shift) + shift;	508	return ecb_ctz32 (x >> shift) + shift;
		509	#endif
172	}	510	}
173		511
174	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;	512	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
175	ecb_function_ int	513	ecb_function_ ecb_const int
176	ecb_popcount32 (uint32_t x)	514	ecb_popcount32 (uint32_t x)
177	{	515	{
178	x -= (x >> 1) & 0x55555555;	516	x -= (x >> 1) & 0x55555555;
179	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);	517	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
180	x = ((x >> 4) + x) & 0x0f0f0f0f;	518	x = ((x >> 4) + x) & 0x0f0f0f0f;
181	x *= 0x01010101;	519	x *= 0x01010101;
182		520
183	return x >> 24;	521	return x >> 24;
184	}	522	}
185		523
186	/* you have the choice beetween something with a table lookup, */
187	/* something using lots of bit arithmetic and a simple loop */
188	/* we went for the loop */
189	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;	524	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
190	ecb_function_ int ecb_ld32 (uint32_t x)	525	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
191	{	526	{
		527	#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
		528	unsigned long r;
		529	_BitScanReverse (&r, x);
		530	return (int)r;
		531	#else
192	int r = -1;	532	int r = 0;
193		533
194	do	534	if (x >> 16) { x >>= 16; r += 16; }
195	{	535	if (x >> 8) { x >>= 8; r += 8; }
196	x >>= 1;	536	if (x >> 4) { x >>= 4; r += 4; }
197	++r;	537	if (x >> 2) { x >>= 2; r += 2; }
198	}	538	if (x >> 1) { r += 1; }
199	while (x);
200		539
201	return r;	540	return r;
		541	#endif
202	}	542	}
203		543
204	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;	544	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
205	ecb_function_ int ecb_ld64 (uint64_t x)	545	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
206	{	546	{
		547	#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
		548	unsigned long r;
		549	_BitScanReverse64 (&r, x);
		550	return (int)r;
		551	#else
207	int r = -1;	552	int r = 0;
208		553
209	do	554	if (x >> 32) { x >>= 32; r += 32; }
210	{
211	x >>= 1;
212	++r;
213	}
214	while (x);
215		555
		556	return r + ecb_ld32 (x);
		557	#endif
		558	}
		559	#endif
		560
		561	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
		562	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
		563	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
		564	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
		565
		566	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
		567	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
		568	{
		569	return ( (x * 0x0802U & 0x22110U)
		570	| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
		571	}
		572
		573	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
		574	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
		575	{
		576	x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
		577	x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
		578	x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
		579	x = ( x >> 8 ) | ( x << 8);
		580
216	return r;	581	return x;
217	}	582	}
218	#endif	583
		584	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
		585	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
		586	{
		587	x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
		588	x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
		589	x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
		590	x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
		591	x = ( x >> 16 ) | ( x << 16);
		592
		593	return x;
		594	}
219		595
220	/* popcount64 is only available on 64 bit cpus as gcc builtin */	596	/* popcount64 is only available on 64 bit cpus as gcc builtin */
221	/* so for this version we are lazy */	597	/* so for this version we are lazy */
222	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	598	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
223	ecb_function_ int	599	ecb_function_ ecb_const int
224	ecb_popcount64 (uint64_t x)	600	ecb_popcount64 (uint64_t x)
225	{	601	{
226	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);	602	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
227	}	603	}
228		604
229	#if ECB_GCC_VERSION(4,3)	605	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
		606	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
		607	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
		608	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
		609	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
		610	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
		611	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
		612	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
		613
		614	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> (-count & 7)) | (x << (count & 7)); }
		615	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << (-count & 7)) | (x >> (count & 7)); }
		616	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (-count & 15)) | (x << (count & 15)); }
		617	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (-count & 15)) | (x >> (count & 15)); }
		618	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (-count & 31)) | (x << (count & 31)); }
		619	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (-count & 31)) | (x >> (count & 31)); }
		620	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (-count & 63)) | (x << (count & 63)); }
		621	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (-count & 63)) | (x >> (count & 63)); }
		622
		623	#if ECB_CPP
		624
		625	inline uint8_t ecb_ctz (uint8_t v) { return ecb_ctz32 (v); }
		626	inline uint16_t ecb_ctz (uint16_t v) { return ecb_ctz32 (v); }
		627	inline uint32_t ecb_ctz (uint32_t v) { return ecb_ctz32 (v); }
		628	inline uint64_t ecb_ctz (uint64_t v) { return ecb_ctz64 (v); }
		629
		630	inline bool ecb_is_pot (uint8_t v) { return ecb_is_pot32 (v); }
		631	inline bool ecb_is_pot (uint16_t v) { return ecb_is_pot32 (v); }
		632	inline bool ecb_is_pot (uint32_t v) { return ecb_is_pot32 (v); }
		633	inline bool ecb_is_pot (uint64_t v) { return ecb_is_pot64 (v); }
		634
		635	inline int ecb_ld (uint8_t v) { return ecb_ld32 (v); }
		636	inline int ecb_ld (uint16_t v) { return ecb_ld32 (v); }
		637	inline int ecb_ld (uint32_t v) { return ecb_ld32 (v); }
		638	inline int ecb_ld (uint64_t v) { return ecb_ld64 (v); }
		639
		640	inline int ecb_popcount (uint8_t v) { return ecb_popcount32 (v); }
		641	inline int ecb_popcount (uint16_t v) { return ecb_popcount32 (v); }
		642	inline int ecb_popcount (uint32_t v) { return ecb_popcount32 (v); }
		643	inline int ecb_popcount (uint64_t v) { return ecb_popcount64 (v); }
		644
		645	inline uint8_t ecb_bitrev (uint8_t v) { return ecb_bitrev8 (v); }
		646	inline uint16_t ecb_bitrev (uint16_t v) { return ecb_bitrev16 (v); }
		647	inline uint32_t ecb_bitrev (uint32_t v) { return ecb_bitrev32 (v); }
		648
		649	inline uint8_t ecb_rotl (uint8_t v, unsigned int count) { return ecb_rotl8 (v, count); }
		650	inline uint16_t ecb_rotl (uint16_t v, unsigned int count) { return ecb_rotl16 (v, count); }
		651	inline uint32_t ecb_rotl (uint32_t v, unsigned int count) { return ecb_rotl32 (v, count); }
		652	inline uint64_t ecb_rotl (uint64_t v, unsigned int count) { return ecb_rotl64 (v, count); }
		653
		654	inline uint8_t ecb_rotr (uint8_t v, unsigned int count) { return ecb_rotr8 (v, count); }
		655	inline uint16_t ecb_rotr (uint16_t v, unsigned int count) { return ecb_rotr16 (v, count); }
		656	inline uint32_t ecb_rotr (uint32_t v, unsigned int count) { return ecb_rotr32 (v, count); }
		657	inline uint64_t ecb_rotr (uint64_t v, unsigned int count) { return ecb_rotr64 (v, count); }
		658
		659	#endif
		660
		661	#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
		662	#if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
		663	#define ecb_bswap16(x) __builtin_bswap16 (x)
		664	#else
230	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)	665	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		666	#endif
231	#define ecb_bswap32(x) __builtin_bswap32 (x)	667	#define ecb_bswap32(x) __builtin_bswap32 (x)
232	#define ecb_bswap64(x) __builtin_bswap64 (x)	668	#define ecb_bswap64(x) __builtin_bswap64 (x)
		669	#elif _MSC_VER
		670	#include <stdlib.h>
		671	#define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
		672	#define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
		673	#define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
233	#else	674	#else
234	ecb_function_ uint32_t ecb_bswap16 (uint32_t x) ecb_const;	675	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
235	ecb_function_ uint32_t	676	ecb_function_ ecb_const uint16_t
236	ecb_bswap16 (uint32_t x)	677	ecb_bswap16 (uint16_t x)
237	{	678	{
238	return ((x >> 8) & 0xff)	679	return ecb_rotl16 (x, 8);
239	| ((x << 8) & 0x00ff0000)
240	| (x << 24);
241	}	680	}
242		681
243	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;	682	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
244	ecb_function_ uint32_t	683	ecb_function_ ecb_const uint32_t
245	ecb_bswap32 (uint32_t x)	684	ecb_bswap32 (uint32_t x)
246	{	685	{
247	return (x >> 24)	686	return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
248	| ((x >> 8) & 0x0000ff00)
249	| ((x << 8) & 0x00ff0000)
250	| (x << 24);
251	}	687	}
252		688
253	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;	689	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
254	ecb_function_ uint64_t	690	ecb_function_ ecb_const uint64_t
255	ecb_bswap64 (uint64_t x)	691	ecb_bswap64 (uint64_t x)
256	{	692	{
257	return (((uint64_t)ecb_bswap32 (x)) << 32)	693	return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
258	| ecb_bswap32 (x >> 32);
259	}	694	}
260	#endif	695	#endif
261		696
262	#if ECB_GCC_VERSION(4,5)	697	#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
263	#define ecb_unreachable() __builtin_unreachable ()	698	#define ecb_unreachable() __builtin_unreachable ()
264	#else	699	#else
265	/* this seems to work fine, but gcc always emits a warning for it :/ */	700	/* this seems to work fine, but gcc always emits a warning for it :/ */
266	ecb_function_ void ecb_unreachable (void) ecb_noreturn;	701	ecb_inline ecb_noreturn void ecb_unreachable (void);
267	ecb_function_ void ecb_unreachable (void) { }	702	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
268	#endif	703	#endif
269		704
270	/* try to tell the compiler that some condition is definitely true */	705	/* try to tell the compiler that some condition is definitely true */
271	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)	706	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
272		707
273	ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;	708	ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
274	ecb_function_ unsigned char	709	ecb_inline ecb_const uint32_t
275	ecb_byteorder_helper (void)	710	ecb_byteorder_helper (void)
276	{	711	{
277	const uint32_t u = 0x11223344;	712	/* the union code still generates code under pressure in gcc, */
278	return *(unsigned char *)&u;	713	/* but less than using pointers, and always seems to */
		714	/* successfully return a constant. */
		715	/* the reason why we have this horrible preprocessor mess */
		716	/* is to avoid it in all cases, at least on common architectures */
		717	/* or when using a recent enough gcc version (>= 4.6) */
		718	#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
		719	|| ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
		720	#define ECB_LITTLE_ENDIAN 1
		721	return 0x44332211;
		722	#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
		723	|| ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
		724	#define ECB_BIG_ENDIAN 1
		725	return 0x11223344;
		726	#else
		727	union
		728	{
		729	uint8_t c[4];
		730	uint32_t u;
		731	} u = { 0x11, 0x22, 0x33, 0x44 };
		732	return u.u;
		733	#endif
279	}	734	}
280		735
281	ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;	736	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
282	ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }	737	ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
283	ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;	738	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
284	ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }	739	ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
		740
		741	/*****************************************************************************/
		742	/* unaligned load/store */
		743
		744	ecb_inline uint_fast16_t ecb_be_u16_to_host (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
		745	ecb_inline uint_fast32_t ecb_be_u32_to_host (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
		746	ecb_inline uint_fast64_t ecb_be_u64_to_host (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
		747
		748	ecb_inline uint_fast16_t ecb_le_u16_to_host (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
		749	ecb_inline uint_fast32_t ecb_le_u32_to_host (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
		750	ecb_inline uint_fast64_t ecb_le_u64_to_host (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
		751
		752	ecb_inline uint_fast16_t ecb_peek_u16_u (const void *ptr) { uint16_t v; memcpy (&v, ptr, sizeof (v)); return v; }
		753	ecb_inline uint_fast32_t ecb_peek_u32_u (const void *ptr) { uint32_t v; memcpy (&v, ptr, sizeof (v)); return v; }
		754	ecb_inline uint_fast64_t ecb_peek_u64_u (const void *ptr) { uint64_t v; memcpy (&v, ptr, sizeof (v)); return v; }
		755
		756	ecb_inline uint_fast16_t ecb_peek_be_u16_u (const void *ptr) { return ecb_be_u16_to_host (ecb_peek_u16_u (ptr)); }
		757	ecb_inline uint_fast32_t ecb_peek_be_u32_u (const void *ptr) { return ecb_be_u32_to_host (ecb_peek_u32_u (ptr)); }
		758	ecb_inline uint_fast64_t ecb_peek_be_u64_u (const void *ptr) { return ecb_be_u64_to_host (ecb_peek_u64_u (ptr)); }
		759
		760	ecb_inline uint_fast16_t ecb_peek_le_u16_u (const void *ptr) { return ecb_le_u16_to_host (ecb_peek_u16_u (ptr)); }
		761	ecb_inline uint_fast32_t ecb_peek_le_u32_u (const void *ptr) { return ecb_le_u32_to_host (ecb_peek_u32_u (ptr)); }
		762	ecb_inline uint_fast64_t ecb_peek_le_u64_u (const void *ptr) { return ecb_le_u64_to_host (ecb_peek_u64_u (ptr)); }
		763
		764	ecb_inline uint_fast16_t ecb_host_to_be_u16 (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
		765	ecb_inline uint_fast32_t ecb_host_to_be_u32 (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
		766	ecb_inline uint_fast64_t ecb_host_to_be_u64 (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
		767
		768	ecb_inline uint_fast16_t ecb_host_to_le_u16 (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
		769	ecb_inline uint_fast32_t ecb_host_to_le_u32 (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
		770	ecb_inline uint_fast64_t ecb_host_to_le_u64 (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
		771
		772	ecb_inline void ecb_poke_u16_u (void *ptr, uint16_t v) { memcpy (ptr, &v, sizeof (v)); }
		773	ecb_inline void ecb_poke_u32_u (void *ptr, uint32_t v) { memcpy (ptr, &v, sizeof (v)); }
		774	ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); }
		775
		776	ecb_inline void ecb_poke_be_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_be_u16 (v)); }
		777	ecb_inline void ecb_poke_be_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_be_u32 (v)); }
		778	ecb_inline void ecb_poke_be_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_be_u64 (v)); }
		779
		780	ecb_inline void ecb_poke_le_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_le_u16 (v)); }
		781	ecb_inline void ecb_poke_le_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_le_u32 (v)); }
		782	ecb_inline void ecb_poke_le_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_le_u64 (v)); }
		783
		784	#if ECB_CPP
		785
		786	inline uint8_t ecb_bswap (uint8_t v) { return v; }
		787	inline uint16_t ecb_bswap (uint16_t v) { return ecb_bswap16 (v); }
		788	inline uint32_t ecb_bswap (uint32_t v) { return ecb_bswap32 (v); }
		789	inline uint64_t ecb_bswap (uint64_t v) { return ecb_bswap64 (v); }
		790
		791	template<typename T> inline T ecb_be_to_host (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
		792	template<typename T> inline T ecb_le_to_host (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
		793	template<typename T> inline T ecb_peek (const void *ptr) { return *(const T *)ptr; }
		794	template<typename T> inline T ecb_peek_be (const void *ptr) { return ecb_be_to_host (ecb_peek <T> (ptr)); }
		795	template<typename T> inline T ecb_peek_le (const void *ptr) { return ecb_le_to_host (ecb_peek <T> (ptr)); }
		796	template<typename T> inline T ecb_peek_u (const void *ptr) { T v; memcpy (&v, ptr, sizeof (v)); return v; }
		797	template<typename T> inline T ecb_peek_be_u (const void *ptr) { return ecb_be_to_host (ecb_peek_u<T> (ptr)); }
		798	template<typename T> inline T ecb_peek_le_u (const void *ptr) { return ecb_le_to_host (ecb_peek_u<T> (ptr)); }
		799
		800	template<typename T> inline T ecb_host_to_be (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
		801	template<typename T> inline T ecb_host_to_le (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
		802	template<typename T> inline void ecb_poke (void *ptr, T v) { *(T *)ptr = v; }
		803	template<typename T> inline void ecb_poke_be (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_be (v)); }
		804	template<typename T> inline void ecb_poke_le (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_le (v)); }
		805	template<typename T> inline void ecb_poke_u (void *ptr, T v) { memcpy (ptr, &v, sizeof (v)); }
		806	template<typename T> inline void ecb_poke_be_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_be (v)); }
		807	template<typename T> inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_le (v)); }
		808
		809	#endif
		810
		811	/*****************************************************************************/
		812	/* division */
285		813
286	#if ECB_GCC_VERSION(3,0) || ECB_C99	814	#if ECB_GCC_VERSION(3,0) || ECB_C99
		815	/* C99 tightened the definition of %, so we can use a more efficient version */
287	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))	816	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
288	#else	817	#else
289	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))	818	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
290	#endif	819	#endif
		820
		821	#if ECB_CPP
		822	template<typename T>
		823	static inline T ecb_div_rd (T val, T div)
		824	{
		825	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
		826	}
		827	template<typename T>
		828	static inline T ecb_div_ru (T val, T div)
		829	{
		830	return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
		831	}
		832	#else
		833	#define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
		834	#define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
		835	#endif
		836
		837	/*****************************************************************************/
		838	/* array length */
291		839
292	#if ecb_cplusplus_does_not_suck	840	#if ecb_cplusplus_does_not_suck
293	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */	841	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
294	template<typename T, int N>	842	template<typename T, int N>
295	static inline int ecb_array_length (const T (&arr)[N])	843	static inline int ecb_array_length (const T (&arr)[N])
…		…
298	}	846	}
299	#else	847	#else
300	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	848	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
301	#endif	849	#endif
302		850
303	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;	851	/*****************************************************************************/
304	ecb_inline uint32_t	852	/* IEEE 754-2008 half float conversions */
305	ecb_rotr32 (uint32_t x, unsigned int count)	853
		854	ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
		855	ecb_function_ ecb_const uint32_t
		856	ecb_binary16_to_binary32 (uint32_t x)
306	{	857	{
307	return (x << (32 - count)) | (x >> count);	858	unsigned int s = (x & 0x8000) << (31 - 15);
		859	int e = (x >> 10) & 0x001f;
		860	unsigned int m = x & 0x03ff;
		861
		862	if (ecb_expect_false (e == 31))
		863	/* infinity or NaN */
		864	e = 255 - (127 - 15);
		865	else if (ecb_expect_false (!e))
		866	{
		867	if (ecb_expect_true (!m))
		868	/* zero, handled by code below by forcing e to 0 */
		869	e = 0 - (127 - 15);
		870	else
		871	{
		872	/* subnormal, renormalise */
		873	unsigned int s = 10 - ecb_ld32 (m);
		874
		875	m = (m << s) & 0x3ff; /* mask implicit bit */
		876	e -= s - 1;
		877	}
		878	}
		879
		880	/* e and m now are normalised, or zero, (or inf or nan) */
		881	e += 127 - 15;
		882
		883	return s | (e << 23) | (m << (23 - 10));
308	}	884	}
309		885
310	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;	886	ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
311	ecb_inline uint32_t	887	ecb_function_ ecb_const uint16_t
312	ecb_rotl32 (uint32_t x, unsigned int count)	888	ecb_binary32_to_binary16 (uint32_t x)
313	{	889	{
314	return (x >> (32 - count)) | (x << count);	890	unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
		891	int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
		892	unsigned int m = x & 0x007fffff;
		893
		894	x &= 0x7fffffff;
		895
		896	/* if it's within range of binary16 normals, use fast path */
		897	if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
		898	{
		899	/* mantissa round-to-even */
		900	m += 0x00000fff + ((m >> (23 - 10)) & 1);
		901
		902	/* handle overflow */
		903	if (ecb_expect_false (m >= 0x00800000))
		904	{
		905	m >>= 1;
		906	e += 1;
		907	}
		908
		909	return s | (e << 10) | (m >> (23 - 10));
		910	}
		911
		912	/* handle large numbers and infinity */
		913	if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
		914	return s | 0x7c00;
		915
		916	/* handle zero, subnormals and small numbers */
		917	if (ecb_expect_true (x < 0x38800000))
		918	{
		919	/* zero */
		920	if (ecb_expect_true (!x))
		921	return s;
		922
		923	/* handle subnormals */
		924
		925	/* too small, will be zero */
		926	if (e < (14 - 24)) /* might not be sharp, but is good enough */
		927	return s;
		928
		929	m |= 0x00800000; /* make implicit bit explicit */
		930
		931	/* very tricky - we need to round to the nearest e (+10) bit value */
		932	{
		933	unsigned int bits = 14 - e;
		934	unsigned int half = (1 << (bits - 1)) - 1;
		935	unsigned int even = (m >> bits) & 1;
		936
		937	/* if this overflows, we will end up with a normalised number */
		938	m = (m + half + even) >> bits;
		939	}
		940
		941	return s | m;
		942	}
		943
		944	/* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
		945	m >>= 13;
		946
		947	return s | 0x7c00 | m | !m;
315	}	948	}
316		949
317	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;	950	/*******************************************************************************/
318	ecb_inline uint64_t	951	/* fast integer to ascii */
319	ecb_rotr64 (uint64_t x, unsigned int count)	952
		953	/*
		954	* This code is pretty complicated because it is general. The idea behind it,
		955	* however, is pretty simple: first, the number is multiplied with a scaling
		956	* factor (2**bits / 10**(digits-1)) to convert the integer into a fixed-point
		957	* number with the first digit in the upper bits.
		958	* Then this digit is converted to text and masked out. The resulting number
		959	* is then multiplied by 10, by multiplying the fixed point representation
		960	* by 5 and shifting the (binary) decimal point one to the right, so a 4.28
		961	* format becomes 5.27, 6.26 and so on.
		962	* The rest involves only advancing the pointer if we already generated a
		963	* non-zero digit, so leading zeroes are overwritten.
		964	*/
		965
		966	// simply return a mask with "bits" bits set
		967	#define ecb_i2a_mask(type,bits) ((((type)1) << (bits)) - 1)
		968
		969	// oputput a single digit. maskvalue is 10**digitidx
		970	#define ecb_i2a_digit(type,bits,digitmask,maskvalue,digitidx) \
		971	if (digitmask >= maskvalue) /* constant, used to decide how many digits to generate */ \
		972	{ \
		973	char digit = x >> (bits - digitidx); /* calculate the topmost digit */ \
		974	*ptr = digit + '0'; /* output it */ \
		975	nz = (digitmask == maskvalue) || nz || digit; /* first term == always output last digit */ \
		976	ptr += nz; /* output digit only if non-zero digit seen */ \
		977	x = (x & ecb_i2a_mask (type, bits - digitidx)) * 5; /* *10, but shift decimal point right */ \
		978	}
		979
		980	// convert integer to fixed point format and multiply out digits, highest first
		981	// requires magic constants: max. digits and number of bits after the decimal point
		982	#define ecb_i2a_def(suffix,ptr,v,type,bits,digitmask,lz) \
		983	ecb_inline char *ecb_i2a_ ## suffix (char *ptr, uint32_t u) \
		984	{ \
		985	char nz = lz; /* non-zero digit seen? */ \
		986	/* convert to x.bits fixed-point */ \
		987	type x = u * ((ecb_i2a_mask (type, bits) + digitmask) / digitmask); \
		988	/* output up to 10 digits */ \
		989	ecb_i2a_digit (type,bits,digitmask, 1, 0); \
		990	ecb_i2a_digit (type,bits,digitmask, 10, 1); \
		991	ecb_i2a_digit (type,bits,digitmask, 100, 2); \
		992	ecb_i2a_digit (type,bits,digitmask, 1000, 3); \
		993	ecb_i2a_digit (type,bits,digitmask, 10000, 4); \
		994	ecb_i2a_digit (type,bits,digitmask, 100000, 5); \
		995	ecb_i2a_digit (type,bits,digitmask, 1000000, 6); \
		996	ecb_i2a_digit (type,bits,digitmask, 10000000, 7); \
		997	ecb_i2a_digit (type,bits,digitmask, 100000000, 8); \
		998	ecb_i2a_digit (type,bits,digitmask, 1000000000, 9); \
		999	return ptr; \
		1000	}
		1001
		1002	// predefined versions of the above, for various digits
		1003	// ecb_i2a_xN = almost N digits, limit defined by macro
		1004	// ecb_i2a_N = up to N digits, leading zeroes suppressed
		1005	// ecb_i2a_0N = exactly N digits, including leading zeroes
		1006
		1007	// non-leading-zero versions, limited range
		1008	#define ECB_I2A_MAX_X5 59074 // limit for ecb_i2a_x5
		1009	#define ECB_I2A_MAX_X10 2932500665 // limit for ecb_i2a_x10
		1010	ecb_i2a_def ( x5, ptr, v, uint32_t, 26, 10000, 0)
		1011	ecb_i2a_def (x10, ptr, v, uint64_t, 60, 1000000000, 0)
		1012
		1013	// non-leading zero versions, all digits, 4 and 9 are optimal for 32/64 bit
		1014	ecb_i2a_def ( 2, ptr, v, uint32_t, 10, 10, 0)
		1015	ecb_i2a_def ( 3, ptr, v, uint32_t, 12, 100, 0)
		1016	ecb_i2a_def ( 4, ptr, v, uint32_t, 26, 1000, 0)
		1017	ecb_i2a_def ( 5, ptr, v, uint64_t, 30, 10000, 0)
		1018	ecb_i2a_def ( 6, ptr, v, uint64_t, 36, 100000, 0)
		1019	ecb_i2a_def ( 7, ptr, v, uint64_t, 44, 1000000, 0)
		1020	ecb_i2a_def ( 8, ptr, v, uint64_t, 50, 10000000, 0)
		1021	ecb_i2a_def ( 9, ptr, v, uint64_t, 56, 100000000, 0)
		1022
		1023	// leading-zero versions, all digits, 04 and 09 are optimal for 32/64 bit
		1024	ecb_i2a_def (02, ptr, v, uint32_t, 10, 10, 1)
		1025	ecb_i2a_def (03, ptr, v, uint32_t, 12, 100, 1)
		1026	ecb_i2a_def (04, ptr, v, uint32_t, 26, 1000, 1)
		1027	ecb_i2a_def (05, ptr, v, uint64_t, 30, 10000, 1)
		1028	ecb_i2a_def (06, ptr, v, uint64_t, 36, 100000, 1)
		1029	ecb_i2a_def (07, ptr, v, uint64_t, 44, 1000000, 1)
		1030	ecb_i2a_def (08, ptr, v, uint64_t, 50, 10000000, 1)
		1031	ecb_i2a_def (09, ptr, v, uint64_t, 56, 100000000, 1)
		1032
		1033	#define ECB_I2A_I32_DIGITS 11
		1034	#define ECB_I2A_U32_DIGITS 10
		1035	#define ECB_I2A_I64_DIGITS 20
		1036	#define ECB_I2A_U64_DIGITS 21
		1037	#define ECB_I2A_MAX_DIGITS 21
		1038
		1039	ecb_inline char *
		1040	ecb_i2a_u32 (char *ptr, uint32_t u)
320	{	1041	{
321	return (x << (64 - count)) | (x >> count);	1042	#if ECB_64BIT_NATIVE
		1043	if (ecb_expect_true (u <= ECB_I2A_MAX_X10))
		1044	ptr = ecb_i2a_x10 (ptr, u);
		1045	else // x10 almost, but not fully, covers 32 bit
		1046	{
		1047	uint32_t u1 = u % 1000000000;
		1048	uint32_t u2 = u / 1000000000;
		1049
		1050	*ptr++ = u2 + '0';
		1051	ptr = ecb_i2a_09 (ptr, u1);
		1052	}
		1053	#else
		1054	if (ecb_expect_true (u <= ECB_I2A_MAX_X5))
		1055	ecb_i2a_x5 (ptr, u);
		1056	else if (ecb_expect_true (u <= ECB_I2A_MAX_X5 * 10000))
		1057	{
		1058	uint32_t u1 = u % 10000;
		1059	uint32_t u2 = u / 10000;
		1060
		1061	ptr = ecb_i2a_x5 (ptr, u2);
		1062	ptr = ecb_i2a_04 (ptr, u1);
		1063	}
		1064	else
		1065	{
		1066	uint32_t u1 = u % 10000;
		1067	uint32_t ua = u / 10000;
		1068	uint32_t u2 = ua % 10000;
		1069	uint32_t u3 = ua / 10000;
		1070
		1071	ptr = ecb_i2a_2 (ptr, u3);
		1072	ptr = ecb_i2a_04 (ptr, u2);
		1073	ptr = ecb_i2a_04 (ptr, u1);
		1074	}
		1075	#endif
		1076
		1077	return ptr;
322	}	1078	}
323		1079
324	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;	1080	ecb_inline char *
325	ecb_inline uint64_t	1081	ecb_i2a_i32 (char *ptr, int32_t v)
326	ecb_rotl64 (uint64_t x, unsigned int count)
327	{	1082	{
328	return (x >> (64 - count)) | (x << count);	1083	*ptr = '-'; ptr += v < 0;
		1084	uint32_t u = v < 0 ? -(uint32_t)v : v;
		1085
		1086	#if ECB_64BIT_NATIVE
		1087	ptr = ecb_i2a_x10 (ptr, u); // x10 fully covers 31 bit
		1088	#else
		1089	ptr = ecb_i2a_u32 (ptr, u);
		1090	#endif
		1091
		1092	return ptr;
329	}	1093	}
330		1094
		1095	ecb_inline char *
		1096	ecb_i2a_u64 (char *ptr, uint64_t u)
		1097	{
		1098	#if ECB_64BIT_NATIVE
		1099	if (ecb_expect_true (u <= ECB_I2A_MAX_X10))
		1100	ptr = ecb_i2a_x10 (ptr, u);
		1101	else if (ecb_expect_false (u <= ECB_I2A_MAX_X10 * 1000000000))
		1102	{
		1103	uint64_t u1 = u % 1000000000;
		1104	uint64_t u2 = u / 1000000000;
		1105
		1106	ptr = ecb_i2a_x10 (ptr, u2);
		1107	ptr = ecb_i2a_09 (ptr, u1);
		1108	}
		1109	else
		1110	{
		1111	uint64_t u1 = u % 1000000000;
		1112	uint64_t ua = u / 1000000000;
		1113	uint64_t u2 = ua % 1000000000;
		1114	uint64_t u3 = ua / 1000000000;
		1115
		1116	ptr = ecb_i2a_2 (ptr, u3);
		1117	ptr = ecb_i2a_09 (ptr, u2);
		1118	ptr = ecb_i2a_09 (ptr, u1);
		1119	}
		1120	#else
		1121	if (ecb_expect_true (u <= ECB_I2A_MAX_X5))
		1122	ptr = ecb_i2a_x5 (ptr, u);
		1123	else
		1124	{
		1125	uint64_t u1 = u % 10000;
		1126	uint64_t u2 = u / 10000;
		1127
		1128	ptr = ecb_i2a_u64 (ptr, u2);
		1129	ptr = ecb_i2a_04 (ptr, u1);
		1130	}
331	#endif	1131	#endif
332		1132
		1133	return ptr;
		1134	}
		1135
		1136	ecb_inline char *
		1137	ecb_i2a_i64 (char *ptr, int64_t v)
		1138	{
		1139	*ptr = '-'; ptr += v < 0;
		1140	uint64_t u = v < 0 ? -(uint64_t)v : v;
		1141
		1142	#if ECB_64BIT_NATIVE
		1143	if (ecb_expect_true (u <= ECB_I2A_MAX_X10))
		1144	ptr = ecb_i2a_x10 (ptr, u);
		1145	else if (ecb_expect_false (u <= ECB_I2A_MAX_X10 * 1000000000))
		1146	{
		1147	uint64_t u1 = u % 1000000000;
		1148	uint64_t u2 = u / 1000000000;
		1149
		1150	ptr = ecb_i2a_x10 (ptr, u2);
		1151	ptr = ecb_i2a_09 (ptr, u1);
		1152	}
		1153	else
		1154	{
		1155	uint64_t u1 = u % 1000000000;
		1156	uint64_t ua = u / 1000000000;
		1157	uint64_t u2 = ua % 1000000000;
		1158	uint64_t u3 = ua / 1000000000;
		1159
		1160	// 2**31 is 19 digits, so the top is exactly one digit
		1161	*ptr++ = u3 + '0';
		1162	ptr = ecb_i2a_09 (ptr, u2);
		1163	ptr = ecb_i2a_09 (ptr, u1);
		1164	}
		1165	#else
		1166	ptr = ecb_i2a_u64 (ptr, u);
		1167	#endif
		1168
		1169	return ptr;
		1170	}
		1171
		1172	/*******************************************************************************/
		1173	/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
		1174
		1175	/* basically, everything uses "ieee pure-endian" floating point numbers */
		1176	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
		1177	#if 0 \
		1178	|| __i386 || __i386__ \
		1179	|| ECB_GCC_AMD64 \
		1180	|| __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
		1181	|| defined __s390__ || defined __s390x__ \
		1182	|| defined __mips__ \
		1183	|| defined __alpha__ \
		1184	|| defined __hppa__ \
		1185	|| defined __ia64__ \
		1186	|| defined __m68k__ \
		1187	|| defined __m88k__ \
		1188	|| defined __sh__ \
		1189	|| defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
		1190	|| (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
		1191	|| defined __aarch64__
		1192	#define ECB_STDFP 1
		1193	#else
		1194	#define ECB_STDFP 0
		1195	#endif
		1196
		1197	#ifndef ECB_NO_LIBM
		1198
		1199	#include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
		1200
		1201	/* only the oldest of old doesn't have this one. solaris. */
		1202	#ifdef INFINITY
		1203	#define ECB_INFINITY INFINITY
		1204	#else
		1205	#define ECB_INFINITY HUGE_VAL
		1206	#endif
		1207
		1208	#ifdef NAN
		1209	#define ECB_NAN NAN
		1210	#else
		1211	#define ECB_NAN ECB_INFINITY
		1212	#endif
		1213
		1214	#if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
		1215	#define ecb_ldexpf(x,e) ldexpf ((x), (e))
		1216	#define ecb_frexpf(x,e) frexpf ((x), (e))
		1217	#else
		1218	#define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
		1219	#define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
		1220	#endif
		1221
		1222	/* convert a float to ieee single/binary32 */
		1223	ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
		1224	ecb_function_ ecb_const uint32_t
		1225	ecb_float_to_binary32 (float x)
		1226	{
		1227	uint32_t r;
		1228
		1229	#if ECB_STDFP
		1230	memcpy (&r, &x, 4);
		1231	#else
		1232	/* slow emulation, works for anything but -0 */
		1233	uint32_t m;
		1234	int e;
		1235
		1236	if (x == 0e0f ) return 0x00000000U;
		1237	if (x > +3.40282346638528860e+38f) return 0x7f800000U;
		1238	if (x < -3.40282346638528860e+38f) return 0xff800000U;
		1239	if (x != x ) return 0x7fbfffffU;
		1240
		1241	m = ecb_frexpf (x, &e) * 0x1000000U;
		1242
		1243	r = m & 0x80000000U;
		1244
		1245	if (r)
		1246	m = -m;
		1247
		1248	if (e <= -126)
		1249	{
		1250	m &= 0xffffffU;
		1251	m >>= (-125 - e);
		1252	e = -126;
		1253	}
		1254
		1255	r |= (e + 126) << 23;
		1256	r |= m & 0x7fffffU;
		1257	#endif
		1258
		1259	return r;
		1260	}
		1261
		1262	/* converts an ieee single/binary32 to a float */
		1263	ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
		1264	ecb_function_ ecb_const float
		1265	ecb_binary32_to_float (uint32_t x)
		1266	{
		1267	float r;
		1268
		1269	#if ECB_STDFP
		1270	memcpy (&r, &x, 4);
		1271	#else
		1272	/* emulation, only works for normals and subnormals and +0 */
		1273	int neg = x >> 31;
		1274	int e = (x >> 23) & 0xffU;
		1275
		1276	x &= 0x7fffffU;
		1277
		1278	if (e)
		1279	x |= 0x800000U;
		1280	else
		1281	e = 1;
		1282
		1283	/* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
		1284	r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
		1285
		1286	r = neg ? -r : r;
		1287	#endif
		1288
		1289	return r;
		1290	}
		1291
		1292	/* convert a double to ieee double/binary64 */
		1293	ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
		1294	ecb_function_ ecb_const uint64_t
		1295	ecb_double_to_binary64 (double x)
		1296	{
		1297	uint64_t r;
		1298
		1299	#if ECB_STDFP
		1300	memcpy (&r, &x, 8);
		1301	#else
		1302	/* slow emulation, works for anything but -0 */
		1303	uint64_t m;
		1304	int e;
		1305
		1306	if (x == 0e0 ) return 0x0000000000000000U;
		1307	if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
		1308	if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
		1309	if (x != x ) return 0X7ff7ffffffffffffU;
		1310
		1311	m = frexp (x, &e) * 0x20000000000000U;
		1312
		1313	r = m & 0x8000000000000000;;
		1314
		1315	if (r)
		1316	m = -m;
		1317
		1318	if (e <= -1022)
		1319	{
		1320	m &= 0x1fffffffffffffU;
		1321	m >>= (-1021 - e);
		1322	e = -1022;
		1323	}
		1324
		1325	r |= ((uint64_t)(e + 1022)) << 52;
		1326	r |= m & 0xfffffffffffffU;
		1327	#endif
		1328
		1329	return r;
		1330	}
		1331
		1332	/* converts an ieee double/binary64 to a double */
		1333	ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
		1334	ecb_function_ ecb_const double
		1335	ecb_binary64_to_double (uint64_t x)
		1336	{
		1337	double r;
		1338
		1339	#if ECB_STDFP
		1340	memcpy (&r, &x, 8);
		1341	#else
		1342	/* emulation, only works for normals and subnormals and +0 */
		1343	int neg = x >> 63;
		1344	int e = (x >> 52) & 0x7ffU;
		1345
		1346	x &= 0xfffffffffffffU;
		1347
		1348	if (e)
		1349	x |= 0x10000000000000U;
		1350	else
		1351	e = 1;
		1352
		1353	/* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
		1354	r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
		1355
		1356	r = neg ? -r : r;
		1357	#endif
		1358
		1359	return r;
		1360	}
		1361
		1362	/* convert a float to ieee half/binary16 */
		1363	ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
		1364	ecb_function_ ecb_const uint16_t
		1365	ecb_float_to_binary16 (float x)
		1366	{
		1367	return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
		1368	}
		1369
		1370	/* convert an ieee half/binary16 to float */
		1371	ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
		1372	ecb_function_ ecb_const float
		1373	ecb_binary16_to_float (uint16_t x)
		1374	{
		1375	return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
		1376	}
		1377
		1378	#endif
		1379
		1380	#endif
		1381

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