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Comparing libecb/ecb.h (file contents):
Revision 1.26 by sf-exg, Thu May 26 21:35:39 2011 UTC vs.
Revision 1.37 by root, Sat Jun 11 13:47:47 2011 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 (©) 2009-2011 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:
… …
38 * or so. 38 * or so.
39 * we try to detect these and simply assume they are not gcc - if they have 39 * 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. 40 * an issue with that they should have done it right in the first place.
41 */ 41 */
42#ifndef ECB_GCC_VERSION 42#ifndef ECB_GCC_VERSION
43# if defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__llvm__) 43 #if defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__llvm__)
44# define ECB_GCC_VERSION(major,minor) 0 44 #define ECB_GCC_VERSION(major,minor) 0
45# else 45 #else
46# define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) 46 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
47# endif 47 #endif
48#endif 48#endif
49 49
50#ifndef __cplusplus 50#ifndef __cplusplus
51# if __STDC_VERSION__ >= 199901L 51 #if __STDC_VERSION__ >= 199901L
52# define ECB_INLINE inline 52 #define ECB_INLINE static inline
53typedef _Bool ecb_bool; 53 typedef _Bool ecb_bool;
54# else 54 #else
55# define ECB_INLINE inline /* yeah! */ 55 #define ECB_INLINE static inline /* we assume the extension is ubiquituous, please tell us when we are wrong, or upgrade to the GCC */
56typedef int ecb_bool; 56 typedef int ecb_bool;
57# endif 57 #endif
58#else
59 #define ECB_INLINE static inline
60 typedef bool ecb_bool;
58#endif 61#endif
59 62
60#define ECB_CONCAT_(a, b) a ## b 63#define ECB_CONCAT_(a, b) a ## b
61#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) 64#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
62#define ECB_STRINGIFY_(a) # a 65#define ECB_STRINGIFY_(a) # a
63#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) 66#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
64 67
65#define ECB_HEADER_INLINE static ECB_INLINE 68#define ECB_HEADER_INLINE ECB_INLINE
66 69
67#if ECB_GCC_VERSION(3,1) 70#if ECB_GCC_VERSION(3,1)
68# define ecb_attribute(attrlist) __attribute__(attrlist) 71 #define ecb_attribute(attrlist) __attribute__(attrlist)
69# define ecb_is_constant(expr) __builtin_constant_p (expr) 72 #define ecb_is_constant(expr) __builtin_constant_p (expr)
70# define ecb_expect(expr,value) __builtin_expect ((expr),(value)) 73 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
71# define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) 74 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
72#else 75#else
73# define ecb_attribute(attrlist) 76 #define ecb_attribute(attrlist)
74# define ecb_is_constant(expr) 0 77 #define ecb_is_constant(expr) 0
75# define ecb_expect(expr,value) (expr) 78 #define ecb_expect(expr,value) (expr)
76# define ecb_prefetch(addr,rw,locality) 79 #define ecb_prefetch(addr,rw,locality)
77#endif 80#endif
78 81
79/* no emulation for ecb_decltype */ 82/* no emulation for ecb_decltype */
80#if ECB_GCC_VERSION(4,5) 83#if ECB_GCC_VERSION(4,5)
81# define ecb_decltype(x) __decltype(x) 84 #define ecb_decltype(x) __decltype(x)
82#elif ECB_GCC_VERSION(3,0) 85#elif ECB_GCC_VERSION(3,0)
83# define ecb_decltype(x) typeof(x) 86 #define ecb_decltype(x) typeof(x)
84#endif 87#endif
85 88
86#define ecb_artificial ecb_attribute ((__artificial__)) /* 4.3 */
87#define ecb_noinline ecb_attribute ((__noinline__)) 89#define ecb_noinline ecb_attribute ((__noinline__))
88#define ecb_noreturn ecb_attribute ((__noreturn__)) 90#define ecb_noreturn ecb_attribute ((__noreturn__))
89#define ecb_unused ecb_attribute ((__unused__)) 91#define ecb_unused ecb_attribute ((__unused__))
90#define ecb_const ecb_attribute ((__const__)) 92#define ecb_const ecb_attribute ((__const__))
91#define ecb_pure ecb_attribute ((__pure__)) 93#define ecb_pure ecb_attribute ((__pure__))
94
95#if ECB_GCC_VERSION(4,3)
96 #define ecb_artificial ecb_attribute ((__artificial__)) /* 4.3 */
92#define ecb_hot ecb_attribute ((__hot__)) /* 4.3 */ 97 #define ecb_hot ecb_attribute ((__hot__)) /* 4.3 */
93#define ecb_cold ecb_attribute ((__cold__)) /* 4.3 */ 98 #define ecb_cold ecb_attribute ((__cold__)) /* 4.3 */
99#else
100 #define ecb_artificial
101 #define ecb_hot
102 #define ecb_cold
103#endif
94 104
95/* put into if's if you are very sure that the expression */ 105/* put into if's if you are very sure that the expression */
96/* is mostly true or mosty false. note that these return */ 106/* is mostly true or mostly false. note that these return */
97/* booleans, not the expression. */ 107/* booleans, not the expression. */
98#define ecb_unlikely(expr) ecb_expect (!!(expr), 0) 108#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
109#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
110/* for compatibility to the rest of the world */
99#define ecb_likely(expr) ecb_expect (!!(expr), 1) 111#define ecb_likely(expr) ecb_expect_true (expr)
112#define ecb_unlikely(expr) ecb_expect_false (expr)
100 113
101/* try to tell the compiler that some condition is definitely true */ 114/* try to tell the compiler that some condition is definitely true */
102#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) 115#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
103 116
104/* count trailing zero bits and count # of one bits */ 117/* count trailing zero bits and count # of one bits */
105#if ECB_GCC_VERSION(3,4) 118#if ECB_GCC_VERSION(3,4)
106#define ecb_ctz32(x) __builtin_ctz (x) 119 #define ecb_ctz32(x) __builtin_ctz (x)
107#define ecb_popcount32(x) __builtin_popcount (x) 120 #define ecb_popcount32(x) __builtin_popcount (x)
108#else 121#else
109ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const; 122 ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const;
110ECB_HEADER_INLINE 123 ECB_HEADER_INLINE int
111ecb_ctz32 (uint32_t x) 124 ecb_ctz32 (uint32_t x)
112{ 125 {
113 int r = 0; 126 int r = 0;
114 127
115 x &= -x; /* this isolates the lowest bit */ 128 x &= -x; /* this isolates the lowest bit */
116 129
117 if (x & 0xaaaaaaaa) r += 1; 130 if (x & 0xaaaaaaaa) r += 1;
118 if (x & 0xcccccccc) r += 2; 131 if (x & 0xcccccccc) r += 2;
119 if (x & 0xf0f0f0f0) r += 4; 132 if (x & 0xf0f0f0f0) r += 4;
120 if (x & 0xff00ff00) r += 8; 133 if (x & 0xff00ff00) r += 8;
121 if (x & 0xffff0000) r += 16; 134 if (x & 0xffff0000) r += 16;
122 135
123 return r; 136 return r;
124} 137 }
125 138
126ECB_HEADER_INLINE int ecb_popcount32 (uint32_t x) ecb_const; 139 ECB_HEADER_INLINE int ecb_popcount32 (uint32_t x) ecb_const;
127ECB_HEADER_INLINE 140 ECB_HEADER_INLINE int
128ecb_popcount32 (uint32_t x) 141 ecb_popcount32 (uint32_t x)
129{ 142 {
130 x -= (x >> 1) & 0x55555555; 143 x -= (x >> 1) & 0x55555555;
131 x = ((x >> 2) & 0x33333333) + (x & 0x33333333); 144 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
132 x = ((x >> 4) + x) & 0x0f0f0f0f; 145 x = ((x >> 4) + x) & 0x0f0f0f0f;
133 x *= 0x01010101; 146 x *= 0x01010101;
134 147
135 return x >> 24; 148 return x >> 24;
136} 149 }
137#endif 150#endif
138 151
139#if ECB_GCC_VERSION(4,3) 152#if ECB_GCC_VERSION(4,3)
140# define ecb_bswap32(x) __builtin_bswap32 (x) 153 #define ecb_bswap32(x) __builtin_bswap32 (x)
141# define ecb_bswap16(x) (__builtin_bswap32(x) >> 16) 154 #define ecb_bswap16(x) (__builtin_bswap32(x) >> 16)
142#else 155#else
143ECB_HEADER_INLINE uint32_t ecb_bswap32 (uint32_t x) ecb_const; 156 ECB_HEADER_INLINE uint32_t ecb_bswap32 (uint32_t x) ecb_const;
144ECB_HEADER_INLINE uint32_t 157 ECB_HEADER_INLINE uint32_t
145ecb_bswap32 (uint32_t x) 158 ecb_bswap32 (uint32_t x)
146{ 159 {
147 return (x >> 24) 160 return (x >> 24)
148 | ((x >> 8) & 0x0000ff00) 161 | ((x >> 8) & 0x0000ff00)
149 | ((x << 8) & 0x00ff0000) 162 | ((x << 8) & 0x00ff0000)
150 | (x << 24); 163 | (x << 24);
151} 164 }
152 165
153ECB_HEADER_INLINE uint32_t ecb_bswap16 (uint32_t x) ecb_const; 166 ECB_HEADER_INLINE uint32_t ecb_bswap16 (uint32_t x) ecb_const;
154ECB_HEADER_INLINE uint32_t 167 ECB_HEADER_INLINE uint32_t
155ecb_bswap16 (uint32_t x) 168 ecb_bswap16 (uint32_t x)
156{ 169 {
157 return ((x >> 8) & 0xff) 170 return ((x >> 8) & 0xff)
158 | ((x << 8) & 0x00ff0000) 171 | ((x << 8) & 0x00ff0000)
159 | (x << 24); 172 | (x << 24);
160} 173 }
161#endif 174#endif
162 175
163#if ECB_GCC_VERSION(4,5) 176#if ECB_GCC_VERSION(4,5)
164# define ecb_unreachable() __builtin_unreachable () 177 #define ecb_unreachable() __builtin_unreachable ()
165#else 178#else
166/* this seems to work fine, but gcc always emits a warning for it :/ */ 179 /* this seems to work fine, but gcc always emits a warning for it :/ */
167ECB_HEADER_INLINE void ecb_unreachable (void) ecb_noreturn; 180 ECB_HEADER_INLINE void ecb_unreachable (void) ecb_noreturn;
168ECB_HEADER_INLINE void ecb_unreachable (void) { } 181 ECB_HEADER_INLINE void ecb_unreachable (void) { }
169#endif 182#endif
170 183
171ECB_HEADER_INLINE unsigned char ecb_byteorder_helper (void) ecb_const; 184ECB_HEADER_INLINE unsigned char ecb_byteorder_helper (void) ecb_const;
172ECB_HEADER_INLINE unsigned char 185ECB_HEADER_INLINE unsigned char
173ecb_byteorder_helper (void) 186ecb_byteorder_helper (void)
… …
179ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) ecb_const; 192ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) ecb_const;
180ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }; 193ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; };
181ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) ecb_const; 194ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) ecb_const;
182ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }; 195ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; };
183 196
197#if ECB_GCC_VERSION(3,0)
198 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
199#else
184#define ecb_mod(m, n) ((m) < 0 ? ((n) - (-(m) % (n))) : ((m) % (n))) 200 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
201#endif
185 202
186#if ecb_cplusplus_does_not_suck 203#if ecb_cplusplus_does_not_suck
187// does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) 204 // does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm)
188template<typename T, int N> 205 template<typename T, int N>
189static inline int ecb_array_length (const T (&arr)[N]) 206 static inline int ecb_array_length (const T (&arr)[N])
190{ 207 {
191 return N; 208 return N;
192} 209 }
193#else 210#else
194#define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) 211 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
195#endif 212#endif
196 213
197ECB_INLINE uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; 214ECB_INLINE uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
198ECB_INLINE uint32_t 215ECB_INLINE uint32_t
199ecb_rotr32 (uint32_t x, unsigned int count) 216ecb_rotr32 (uint32_t x, unsigned int count)

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