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Comparing libecb/ecb.h (file contents):
Revision 1.35 by root, Sat Jun 11 13:25:25 2011 UTC vs.
Revision 1.47 by root, Fri Jun 17 16:03:01 2011 UTC

… …
28 */ 28 */
29 29
30#ifndef ECB_H 30#ifndef ECB_H
31#define ECB_H 31#define ECB_H
32 32
33#ifdef _WIN32
34 typedef signed char int8_t;
35 typedef unsigned char uint8_t;
36 typedef signed short int16_t;
37 typedef unsigned short uint16_t;
38 typedef signed int int32_t;
39 typedef unsigned int uint32_t;
40 #if __GNUC__
41 typedef signed long long int64_t;
42 typedef unsigned long long uint64_t;
43 #else
44 typedef signed __int64 int64_t;
45 typedef unsigned __int64 uint64_t;
46 #endif
47#else
33#include <inttypes.h> 48 #include <inttypes.h>
49#endif
34 50
35/* many compilers define _GNUC_ to some versions but then only implement 51/* many compilers define _GNUC_ to some versions but then only implement
36 * what their idiot authors think are the "more important" extensions, 52 * what their idiot authors think are the "more important" extensions,
37 * causing enourmous grief in return for some better fake benchmark numbers. 53 * causing enourmous grief in return for some better fake benchmark numbers.
38 * or so. 54 * or so.
39 * we try to detect these and simply assume they are not gcc - if they have 55 * 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. 56 * an issue with that they should have done it right in the first place.
41 */ 57 */
42#ifndef ECB_GCC_VERSION 58#ifndef ECB_GCC_VERSION
43# if defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__llvm__) 59 #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 60 #define ECB_GCC_VERSION(major,minor) 0
45# else 61 #else
46# define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) 62 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
63 #endif
47# endif 64#endif
48#endif
49 65
66#define ECB_C99 (__STDC_VERSION__ >= 199901L)
67
50#ifndef __cplusplus 68#if __cplusplus
51# if __STDC_VERSION__ >= 199901L 69 #define ecb_inline static inline
52# define ECB_INLINE static inline 70#elif ECB_GCC_VERSION(2,5)
53typedef _Bool ecb_bool; 71 #define ecb_inline static __inline__
72#elif ECB_C99
73 #define ecb_inline static inline
54# else 74#else
55# define ECB_INLINE static inline /* yeah! */ 75 #define ecb_inline static
76#endif
77
78#if ECB_GCC_VERSION(3,3)
79 #define ecb_restrict __restrict__
80#elif ECB_C99
81 #define ecb_restrict restrict
82#else
83 #define ecb_restrict
84#endif
85
56typedef int ecb_bool; 86typedef int ecb_bool;
57# endif
58#else
59# define ECB_INLINE static inline
60typedef bool ecb_bool;
61#endif
62 87
63#define ECB_CONCAT_(a, b) a ## b 88#define ECB_CONCAT_(a, b) a ## b
64#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) 89#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
65#define ECB_STRINGIFY_(a) # a 90#define ECB_STRINGIFY_(a) # a
66#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) 91#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
67 92
68#define ECB_HEADER_INLINE ECB_INLINE 93#define ecb_function_ ecb_inline
69 94
70#if ECB_GCC_VERSION(3,1) 95#if ECB_GCC_VERSION(3,1)
71# define ecb_attribute(attrlist) __attribute__(attrlist) 96 #define ecb_attribute(attrlist) __attribute__(attrlist)
72# define ecb_is_constant(expr) __builtin_constant_p (expr) 97 #define ecb_is_constant(expr) __builtin_constant_p (expr)
73# define ecb_expect(expr,value) __builtin_expect ((expr),(value)) 98 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
74# define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) 99 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
75#else 100#else
76# define ecb_attribute(attrlist) 101 #define ecb_attribute(attrlist)
77# define ecb_is_constant(expr) 0 102 #define ecb_is_constant(expr) 0
78# define ecb_expect(expr,value) (expr) 103 #define ecb_expect(expr,value) (expr)
79# define ecb_prefetch(addr,rw,locality) 104 #define ecb_prefetch(addr,rw,locality)
80#endif 105#endif
81 106
82/* no emulation for ecb_decltype */ 107/* no emulation for ecb_decltype */
83#if ECB_GCC_VERSION(4,5) 108#if ECB_GCC_VERSION(4,5)
84# define ecb_decltype(x) __decltype(x) 109 #define ecb_decltype(x) __decltype(x)
85#elif ECB_GCC_VERSION(3,0) 110#elif ECB_GCC_VERSION(3,0)
86# define ecb_decltype(x) typeof(x) 111 #define ecb_decltype(x) __typeof(x)
87#endif 112#endif
88 113
89#define ecb_noinline ecb_attribute ((__noinline__)) 114#define ecb_noinline ecb_attribute ((__noinline__))
90#define ecb_noreturn ecb_attribute ((__noreturn__)) 115#define ecb_noreturn ecb_attribute ((__noreturn__))
91#define ecb_unused ecb_attribute ((__unused__)) 116#define ecb_unused ecb_attribute ((__unused__))
92#define ecb_const ecb_attribute ((__const__)) 117#define ecb_const ecb_attribute ((__const__))
93#define ecb_pure ecb_attribute ((__pure__)) 118#define ecb_pure ecb_attribute ((__pure__))
94 119
95#if ECB_GCC_VERSION(4,3) 120#if ECB_GCC_VERSION(4,3)
96 #define ecb_artificial ecb_attribute ((__artificial__)) /* 4.3 */ 121 #define ecb_artificial ecb_attribute ((__artificial__))
97 #define ecb_hot ecb_attribute ((__hot__)) /* 4.3 */ 122 #define ecb_hot ecb_attribute ((__hot__))
98 #define ecb_cold ecb_attribute ((__cold__)) /* 4.3 */ 123 #define ecb_cold ecb_attribute ((__cold__))
99#else 124#else
100 #define ecb_artificial 125 #define ecb_artificial
101 #define ecb_hot 126 #define ecb_hot
102 #define ecb_cold 127 #define ecb_cold
103#endif 128#endif
104 129
105/* put into if's if you are very sure that the expression */ 130/* put around conditional expressions if you are very sure that the */
106/* is mostly true or mostly false. note that these return */ 131/* expression is mostly true or mostly false. note that these return */
107/* booleans, not the expression. */ 132/* booleans, not the expression. */
108#define ecb_expect_false(expr) ecb_expect (!!(expr), 0) 133#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
109#define ecb_expect_true(expr) ecb_expect (!!(expr), 1) 134#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
135/* for compatibility to the rest of the world */
110#define ecb_likely(expr) ecb_expect_true (expr) 136#define ecb_likely(expr) ecb_expect_true (expr)
111#define ecb_unlikely(expr) ecb_expect_false (expr) 137#define ecb_unlikely(expr) ecb_expect_false (expr)
112
113/* try to tell the compiler that some condition is definitely true */
114#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
115 138
116/* count trailing zero bits and count # of one bits */ 139/* count trailing zero bits and count # of one bits */
117#if ECB_GCC_VERSION(3,4) 140#if ECB_GCC_VERSION(3,4)
118 #define ecb_ctz32(x) __builtin_ctz (x) 141 #define ecb_ctz32(x) __builtin_ctz (x)
119 #define ecb_popcount32(x) __builtin_popcount (x) 142 #define ecb_popcount32(x) __builtin_popcount (x)
120#else 143#else
121 ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const; 144 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
122 ECB_HEADER_INLINE int 145 ecb_function_ int
123 ecb_ctz32 (uint32_t x) 146 ecb_ctz32 (uint32_t x)
124 { 147 {
125 int r = 0; 148 int r = 0;
126 149
127 x &= -x; /* this isolates the lowest bit */ 150 x &= (uint32_t)-(int32_t)x; /* this isolates the lowest bit */
128 151
129 if (x & 0xaaaaaaaa) r += 1; 152 if (x & 0xaaaaaaaa) r += 1;
130 if (x & 0xcccccccc) r += 2; 153 if (x & 0xcccccccc) r += 2;
131 if (x & 0xf0f0f0f0) r += 4; 154 if (x & 0xf0f0f0f0) r += 4;
132 if (x & 0xff00ff00) r += 8; 155 if (x & 0xff00ff00) r += 8;
133 if (x & 0xffff0000) r += 16; 156 if (x & 0xffff0000) r += 16;
134 157
135 return r; 158 return r;
136 } 159 }
137 160
138 ECB_HEADER_INLINE int ecb_popcount32 (uint32_t x) ecb_const; 161 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
139 ECB_HEADER_INLINE int 162 ecb_function_ int
140 ecb_popcount32 (uint32_t x) 163 ecb_popcount32 (uint32_t x)
141 { 164 {
142 x -= (x >> 1) & 0x55555555; 165 x -= (x >> 1) & 0x55555555;
143 x = ((x >> 2) & 0x33333333) + (x & 0x33333333); 166 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
144 x = ((x >> 4) + x) & 0x0f0f0f0f; 167 x = ((x >> 4) + x) & 0x0f0f0f0f;
… …
150 173
151#if ECB_GCC_VERSION(4,3) 174#if ECB_GCC_VERSION(4,3)
152 #define ecb_bswap32(x) __builtin_bswap32 (x) 175 #define ecb_bswap32(x) __builtin_bswap32 (x)
153 #define ecb_bswap16(x) (__builtin_bswap32(x) >> 16) 176 #define ecb_bswap16(x) (__builtin_bswap32(x) >> 16)
154#else 177#else
155 ECB_HEADER_INLINE uint32_t ecb_bswap32 (uint32_t x) ecb_const; 178 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
156 ECB_HEADER_INLINE uint32_t 179 ecb_function_ uint32_t
157 ecb_bswap32 (uint32_t x) 180 ecb_bswap32 (uint32_t x)
158 { 181 {
159 return (x >> 24) 182 return (x >> 24)
160 | ((x >> 8) & 0x0000ff00) 183 | ((x >> 8) & 0x0000ff00)
161 | ((x << 8) & 0x00ff0000) 184 | ((x << 8) & 0x00ff0000)
162 | (x << 24); 185 | (x << 24);
163 } 186 }
164 187
165 ECB_HEADER_INLINE uint32_t ecb_bswap16 (uint32_t x) ecb_const; 188 ecb_function_ uint32_t ecb_bswap16 (uint32_t x) ecb_const;
166 ECB_HEADER_INLINE uint32_t 189 ecb_function_ uint32_t
167 ecb_bswap16 (uint32_t x) 190 ecb_bswap16 (uint32_t x)
168 { 191 {
169 return ((x >> 8) & 0xff) 192 return ((x >> 8) & 0xff)
170 | ((x << 8) & 0x00ff0000) 193 | ((x << 8) & 0x00ff0000)
171 | (x << 24); 194 | (x << 24);
… …
174 197
175#if ECB_GCC_VERSION(4,5) 198#if ECB_GCC_VERSION(4,5)
176 #define ecb_unreachable() __builtin_unreachable () 199 #define ecb_unreachable() __builtin_unreachable ()
177#else 200#else
178 /* this seems to work fine, but gcc always emits a warning for it :/ */ 201 /* this seems to work fine, but gcc always emits a warning for it :/ */
179 ECB_HEADER_INLINE void ecb_unreachable (void) ecb_noreturn; 202 ecb_function_ void ecb_unreachable (void) ecb_noreturn;
180 ECB_HEADER_INLINE void ecb_unreachable (void) { } 203 ecb_function_ void ecb_unreachable (void) { }
181#endif 204#endif
182 205
206/* try to tell the compiler that some condition is definitely true */
207#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
208
183ECB_HEADER_INLINE unsigned char ecb_byteorder_helper (void) ecb_const; 209ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;
184ECB_HEADER_INLINE unsigned char 210ecb_function_ unsigned char
185ecb_byteorder_helper (void) 211ecb_byteorder_helper (void)
186{ 212{
187 const uint32_t u = 0x11223344; 213 const uint32_t u = 0x11223344;
188 return *(unsigned char *)&u; 214 return *(unsigned char *)&u;
189} 215}
190 216
191ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) ecb_const; 217ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;
192ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }; 218ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
193ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) ecb_const; 219ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;
194ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }; 220ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
195 221
196#if ECB_GCC_VERSION(3,0) 222#if ECB_GCC_VERSION(3,0) || ECB_C99
197 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) 223 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
198#else 224#else
199 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) 225 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
200#endif 226#endif
201 227
202#if ecb_cplusplus_does_not_suck 228#if ecb_cplusplus_does_not_suck
203 // does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) 229 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
204 template<typename T, int N> 230 template<typename T, int N>
205 static inline int ecb_array_length (const T (&arr)[N]) 231 static inline int ecb_array_length (const T (&arr)[N])
206 { 232 {
207 return N; 233 return N;
208 } 234 }
209#else 235#else
210 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) 236 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
211#endif 237#endif
212 238
213ECB_INLINE uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; 239ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
214ECB_INLINE uint32_t 240ecb_inline uint32_t
215ecb_rotr32 (uint32_t x, unsigned int count) 241ecb_rotr32 (uint32_t x, unsigned int count)
216{ 242{
217 return (x << (32 - count)) | (x >> count); 243 return (x << (32 - count)) | (x >> count);
218} 244}
219 245
220ECB_INLINE uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const; 246ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
221ECB_INLINE uint32_t 247ecb_inline uint32_t
222ecb_rotl32 (uint32_t x, unsigned int count) 248ecb_rotl32 (uint32_t x, unsigned int count)
223{ 249{
224 return (x >> (32 - count)) | (x << count); 250 return (x >> (32 - count)) | (x << count);
225} 251}
226 252

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