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Comparing libecb/ecb.h (file contents):
Revision 1.32 by root, Wed Jun 1 01:02:31 2011 UTC vs.
Revision 1.35 by root, Sat Jun 11 13:25:25 2011 UTC

… …
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; 53typedef _Bool ecb_bool;
54# else 54# else
55# define ECB_INLINE inline /* yeah! */ 55# define ECB_INLINE static inline /* yeah! */
56typedef int ecb_bool; 56typedef int ecb_bool;
57# endif 57# endif
58#else 58#else
59# define ECB_INLINE inline 59# define ECB_INLINE static inline
60typedef bool ecb_bool; 60typedef bool ecb_bool;
61#endif 61#endif
62 62
63#define ECB_CONCAT_(a, b) a ## b 63#define ECB_CONCAT_(a, b) a ## b
64#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) 64#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
65#define ECB_STRINGIFY_(a) # a 65#define ECB_STRINGIFY_(a) # a
66#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) 66#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
67 67
68#define ECB_HEADER_INLINE static ECB_INLINE 68#define ECB_HEADER_INLINE ECB_INLINE
69 69
70#if ECB_GCC_VERSION(3,1) 70#if ECB_GCC_VERSION(3,1)
71# define ecb_attribute(attrlist) __attribute__(attrlist) 71# define ecb_attribute(attrlist) __attribute__(attrlist)
72# define ecb_is_constant(expr) __builtin_constant_p (expr) 72# define ecb_is_constant(expr) __builtin_constant_p (expr)
73# define ecb_expect(expr,value) __builtin_expect ((expr),(value)) 73# define ecb_expect(expr,value) __builtin_expect ((expr),(value))
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84# define ecb_decltype(x) __decltype(x) 84# define ecb_decltype(x) __decltype(x)
85#elif ECB_GCC_VERSION(3,0) 85#elif ECB_GCC_VERSION(3,0)
86# define ecb_decltype(x) typeof(x) 86# define ecb_decltype(x) typeof(x)
87#endif 87#endif
88 88
89#define ecb_artificial ecb_attribute ((__artificial__)) /* 4.3 */
90#define ecb_noinline ecb_attribute ((__noinline__)) 89#define ecb_noinline ecb_attribute ((__noinline__))
91#define ecb_noreturn ecb_attribute ((__noreturn__)) 90#define ecb_noreturn ecb_attribute ((__noreturn__))
92#define ecb_unused ecb_attribute ((__unused__)) 91#define ecb_unused ecb_attribute ((__unused__))
93#define ecb_const ecb_attribute ((__const__)) 92#define ecb_const ecb_attribute ((__const__))
94#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 */
95#define ecb_hot ecb_attribute ((__hot__)) /* 4.3 */ 97 #define ecb_hot ecb_attribute ((__hot__)) /* 4.3 */
96#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
97 104
98/* 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 */
99/* is mostly true or mosty false. note that these return */ 106/* is mostly true or mostly false. note that these return */
100/* booleans, not the expression. */ 107/* booleans, not the expression. */
101#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)
102#define ecb_likely(expr) ecb_expect (!!(expr), 1) 110#define ecb_likely(expr) ecb_expect_true (expr)
111#define ecb_unlikely(expr) ecb_expect_false (expr)
103 112
104/* try to tell the compiler that some condition is definitely true */ 113/* try to tell the compiler that some condition is definitely true */
105#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) 114#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
106 115
107/* count trailing zero bits and count # of one bits */ 116/* count trailing zero bits and count # of one bits */
108#if ECB_GCC_VERSION(3,4) 117#if ECB_GCC_VERSION(3,4)
109#define ecb_ctz32(x) __builtin_ctz (x) 118 #define ecb_ctz32(x) __builtin_ctz (x)
110#define ecb_popcount32(x) __builtin_popcount (x) 119 #define ecb_popcount32(x) __builtin_popcount (x)
111#else 120#else
112ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const; 121 ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const;
113ECB_HEADER_INLINE 122 ECB_HEADER_INLINE int
114ecb_ctz32 (uint32_t x) 123 ecb_ctz32 (uint32_t x)
115{ 124 {
116 int r = 0; 125 int r = 0;
117 126
118 x &= -x; /* this isolates the lowest bit */ 127 x &= -x; /* this isolates the lowest bit */
119 128
120 if (x & 0xaaaaaaaa) r += 1; 129 if (x & 0xaaaaaaaa) r += 1;
121 if (x & 0xcccccccc) r += 2; 130 if (x & 0xcccccccc) r += 2;
122 if (x & 0xf0f0f0f0) r += 4; 131 if (x & 0xf0f0f0f0) r += 4;
123 if (x & 0xff00ff00) r += 8; 132 if (x & 0xff00ff00) r += 8;
124 if (x & 0xffff0000) r += 16; 133 if (x & 0xffff0000) r += 16;
125 134
126 return r; 135 return r;
127} 136 }
128 137
129ECB_HEADER_INLINE int ecb_popcount32 (uint32_t x) ecb_const; 138 ECB_HEADER_INLINE int ecb_popcount32 (uint32_t x) ecb_const;
130ECB_HEADER_INLINE 139 ECB_HEADER_INLINE int
131ecb_popcount32 (uint32_t x) 140 ecb_popcount32 (uint32_t x)
132{ 141 {
133 x -= (x >> 1) & 0x55555555; 142 x -= (x >> 1) & 0x55555555;
134 x = ((x >> 2) & 0x33333333) + (x & 0x33333333); 143 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
135 x = ((x >> 4) + x) & 0x0f0f0f0f; 144 x = ((x >> 4) + x) & 0x0f0f0f0f;
136 x *= 0x01010101; 145 x *= 0x01010101;
137 146
138 return x >> 24; 147 return x >> 24;
139} 148 }
140#endif 149#endif
141 150
142#if ECB_GCC_VERSION(4,3) 151#if ECB_GCC_VERSION(4,3)
143# define ecb_bswap32(x) __builtin_bswap32 (x) 152 #define ecb_bswap32(x) __builtin_bswap32 (x)
144# define ecb_bswap16(x) (__builtin_bswap32(x) >> 16) 153 #define ecb_bswap16(x) (__builtin_bswap32(x) >> 16)
145#else 154#else
146ECB_HEADER_INLINE uint32_t ecb_bswap32 (uint32_t x) ecb_const; 155 ECB_HEADER_INLINE uint32_t ecb_bswap32 (uint32_t x) ecb_const;
147ECB_HEADER_INLINE uint32_t 156 ECB_HEADER_INLINE uint32_t
148ecb_bswap32 (uint32_t x) 157 ecb_bswap32 (uint32_t x)
149{ 158 {
150 return (x >> 24) 159 return (x >> 24)
151 | ((x >> 8) & 0x0000ff00) 160 | ((x >> 8) & 0x0000ff00)
152 | ((x << 8) & 0x00ff0000) 161 | ((x << 8) & 0x00ff0000)
153 | (x << 24); 162 | (x << 24);
154} 163 }
155 164
156ECB_HEADER_INLINE uint32_t ecb_bswap16 (uint32_t x) ecb_const; 165 ECB_HEADER_INLINE uint32_t ecb_bswap16 (uint32_t x) ecb_const;
157ECB_HEADER_INLINE uint32_t 166 ECB_HEADER_INLINE uint32_t
158ecb_bswap16 (uint32_t x) 167 ecb_bswap16 (uint32_t x)
159{ 168 {
160 return ((x >> 8) & 0xff) 169 return ((x >> 8) & 0xff)
161 | ((x << 8) & 0x00ff0000) 170 | ((x << 8) & 0x00ff0000)
162 | (x << 24); 171 | (x << 24);
163} 172 }
164#endif 173#endif
165 174
166#if ECB_GCC_VERSION(4,5) 175#if ECB_GCC_VERSION(4,5)
167# define ecb_unreachable() __builtin_unreachable () 176 #define ecb_unreachable() __builtin_unreachable ()
168#else 177#else
169/* this seems to work fine, but gcc always emits a warning for it :/ */ 178 /* this seems to work fine, but gcc always emits a warning for it :/ */
170ECB_HEADER_INLINE void ecb_unreachable (void) ecb_noreturn; 179 ECB_HEADER_INLINE void ecb_unreachable (void) ecb_noreturn;
171ECB_HEADER_INLINE void ecb_unreachable (void) { } 180 ECB_HEADER_INLINE void ecb_unreachable (void) { }
172#endif 181#endif
173 182
174ECB_HEADER_INLINE unsigned char ecb_byteorder_helper (void) ecb_const; 183ECB_HEADER_INLINE unsigned char ecb_byteorder_helper (void) ecb_const;
175ECB_HEADER_INLINE unsigned char 184ECB_HEADER_INLINE unsigned char
176ecb_byteorder_helper (void) 185ecb_byteorder_helper (void)
… …
183ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }; 192ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; };
184ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) ecb_const; 193ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) ecb_const;
185ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }; 194ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; };
186 195
187#if ECB_GCC_VERSION(3,0) 196#if ECB_GCC_VERSION(3,0)
188# define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) 197 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
189#else 198#else
190# define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) 199 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
191#endif 200#endif
192 201
193#if ecb_cplusplus_does_not_suck 202#if ecb_cplusplus_does_not_suck
194// does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) 203 // does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm)
195template<typename T, int N> 204 template<typename T, int N>
196static inline int ecb_array_length (const T (&arr)[N]) 205 static inline int ecb_array_length (const T (&arr)[N])
197{ 206 {
198 return N; 207 return N;
199} 208 }
200#else 209#else
201#define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) 210 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
202#endif 211#endif
203 212
204ECB_INLINE uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; 213ECB_INLINE uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
205ECB_INLINE uint32_t 214ECB_INLINE uint32_t
206ecb_rotr32 (uint32_t x, unsigned int count) 215ecb_rotr32 (uint32_t x, unsigned int count)

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