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Comparing libecb/ecb.h (file contents):
Revision 1.37 by root, Sat Jun 11 13:47:47 2011 UTC vs.
Revision 1.42 by root, Sun Jun 12 08:14:03 2011 UTC

… …
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#define ECB_C99 (__STDC_VERSION__ >= 199901L)
51
50#ifndef __cplusplus 52#if __cplusplus
51 #if __STDC_VERSION__ >= 199901L
52 #define ECB_INLINE static inline
53 typedef _Bool ecb_bool;
54 #else
55 #define ECB_INLINE static inline /* we assume the extension is ubiquituous, please tell us when we are wrong, or upgrade to the GCC */
56 typedef int ecb_bool;
57 #endif
58#else
59 #define ECB_INLINE static inline 53 #define ECB_INLINE static inline
54#elif ECB_GCC_VERSION(2,5)
55 #define ECB_INLINE static __inline__
56#elif ECB_C99
57 #define ECB_INLINE static inline
58#else
59 #define ECB_INLINE static
60#endif
61
62#if ECB_GCC_VERSION(3,3)
63 #define ecb_restrict __restrict__
64#elif ECB_C99
65 #define ecb_restrict restrict
66#else
67 #define ecb_restrict
68#endif
69
60 typedef bool ecb_bool; 70typedef int ecb_bool;
61#endif
62 71
63#define ECB_CONCAT_(a, b) a ## b 72#define ECB_CONCAT_(a, b) a ## b
64#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) 73#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
65#define ECB_STRINGIFY_(a) # a 74#define ECB_STRINGIFY_(a) # a
66#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) 75#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
67 76
68#define ECB_HEADER_INLINE ECB_INLINE 77#define ecb_function_ ECB_INLINE
69 78
70#if ECB_GCC_VERSION(3,1) 79#if ECB_GCC_VERSION(3,1)
71 #define ecb_attribute(attrlist) __attribute__(attrlist) 80 #define ecb_attribute(attrlist) __attribute__(attrlist)
72 #define ecb_is_constant(expr) __builtin_constant_p (expr) 81 #define ecb_is_constant(expr) __builtin_constant_p (expr)
73 #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) 82 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
… …
81 90
82/* no emulation for ecb_decltype */ 91/* no emulation for ecb_decltype */
83#if ECB_GCC_VERSION(4,5) 92#if ECB_GCC_VERSION(4,5)
84 #define ecb_decltype(x) __decltype(x) 93 #define ecb_decltype(x) __decltype(x)
85#elif ECB_GCC_VERSION(3,0) 94#elif ECB_GCC_VERSION(3,0)
86 #define ecb_decltype(x) typeof(x) 95 #define ecb_decltype(x) __typeof(x)
87#endif 96#endif
88 97
89#define ecb_noinline ecb_attribute ((__noinline__)) 98#define ecb_noinline ecb_attribute ((__noinline__))
90#define ecb_noreturn ecb_attribute ((__noreturn__)) 99#define ecb_noreturn ecb_attribute ((__noreturn__))
91#define ecb_unused ecb_attribute ((__unused__)) 100#define ecb_unused ecb_attribute ((__unused__))
92#define ecb_const ecb_attribute ((__const__)) 101#define ecb_const ecb_attribute ((__const__))
93#define ecb_pure ecb_attribute ((__pure__)) 102#define ecb_pure ecb_attribute ((__pure__))
94 103
95#if ECB_GCC_VERSION(4,3) 104#if ECB_GCC_VERSION(4,3)
96 #define ecb_artificial ecb_attribute ((__artificial__)) /* 4.3 */ 105 #define ecb_artificial ecb_attribute ((__artificial__))
97 #define ecb_hot ecb_attribute ((__hot__)) /* 4.3 */ 106 #define ecb_hot ecb_attribute ((__hot__))
98 #define ecb_cold ecb_attribute ((__cold__)) /* 4.3 */ 107 #define ecb_cold ecb_attribute ((__cold__))
99#else 108#else
100 #define ecb_artificial 109 #define ecb_artificial
101 #define ecb_hot 110 #define ecb_hot
102 #define ecb_cold 111 #define ecb_cold
103#endif 112#endif
104 113
105/* put into if's if you are very sure that the expression */ 114/* put around conditional expressions if you are very sure that the */
106/* is mostly true or mostly false. note that these return */ 115/* expression is mostly true or mostly false. note that these return */
107/* booleans, not the expression. */ 116/* booleans, not the expression. */
108#define ecb_expect_false(expr) ecb_expect (!!(expr), 0) 117#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
109#define ecb_expect_true(expr) ecb_expect (!!(expr), 1) 118#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
110/* for compatibility to the rest of the world */ 119/* for compatibility to the rest of the world */
111#define ecb_likely(expr) ecb_expect_true (expr) 120#define ecb_likely(expr) ecb_expect_true (expr)
112#define ecb_unlikely(expr) ecb_expect_false (expr) 121#define ecb_unlikely(expr) ecb_expect_false (expr)
113 122
114/* try to tell the compiler that some condition is definitely true */
115#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
116
117/* count trailing zero bits and count # of one bits */ 123/* count trailing zero bits and count # of one bits */
118#if ECB_GCC_VERSION(3,4) 124#if ECB_GCC_VERSION(3,4)
119 #define ecb_ctz32(x) __builtin_ctz (x) 125 #define ecb_ctz32(x) __builtin_ctz (x)
120 #define ecb_popcount32(x) __builtin_popcount (x) 126 #define ecb_popcount32(x) __builtin_popcount (x)
121#else 127#else
122 ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const; 128 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
123 ECB_HEADER_INLINE int 129 ecb_function_ int
124 ecb_ctz32 (uint32_t x) 130 ecb_ctz32 (uint32_t x)
125 { 131 {
126 int r = 0; 132 int r = 0;
127 133
128 x &= -x; /* this isolates the lowest bit */ 134 x &= -x; /* this isolates the lowest bit */
… …
134 if (x & 0xffff0000) r += 16; 140 if (x & 0xffff0000) r += 16;
135 141
136 return r; 142 return r;
137 } 143 }
138 144
139 ECB_HEADER_INLINE int ecb_popcount32 (uint32_t x) ecb_const; 145 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
140 ECB_HEADER_INLINE int 146 ecb_function_ int
141 ecb_popcount32 (uint32_t x) 147 ecb_popcount32 (uint32_t x)
142 { 148 {
143 x -= (x >> 1) & 0x55555555; 149 x -= (x >> 1) & 0x55555555;
144 x = ((x >> 2) & 0x33333333) + (x & 0x33333333); 150 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
145 x = ((x >> 4) + x) & 0x0f0f0f0f; 151 x = ((x >> 4) + x) & 0x0f0f0f0f;
… …
151 157
152#if ECB_GCC_VERSION(4,3) 158#if ECB_GCC_VERSION(4,3)
153 #define ecb_bswap32(x) __builtin_bswap32 (x) 159 #define ecb_bswap32(x) __builtin_bswap32 (x)
154 #define ecb_bswap16(x) (__builtin_bswap32(x) >> 16) 160 #define ecb_bswap16(x) (__builtin_bswap32(x) >> 16)
155#else 161#else
156 ECB_HEADER_INLINE uint32_t ecb_bswap32 (uint32_t x) ecb_const; 162 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
157 ECB_HEADER_INLINE uint32_t 163 ecb_function_ uint32_t
158 ecb_bswap32 (uint32_t x) 164 ecb_bswap32 (uint32_t x)
159 { 165 {
160 return (x >> 24) 166 return (x >> 24)
161 | ((x >> 8) & 0x0000ff00) 167 | ((x >> 8) & 0x0000ff00)
162 | ((x << 8) & 0x00ff0000) 168 | ((x << 8) & 0x00ff0000)
163 | (x << 24); 169 | (x << 24);
164 } 170 }
165 171
166 ECB_HEADER_INLINE uint32_t ecb_bswap16 (uint32_t x) ecb_const; 172 ecb_function_ uint32_t ecb_bswap16 (uint32_t x) ecb_const;
167 ECB_HEADER_INLINE uint32_t 173 ecb_function_ uint32_t
168 ecb_bswap16 (uint32_t x) 174 ecb_bswap16 (uint32_t x)
169 { 175 {
170 return ((x >> 8) & 0xff) 176 return ((x >> 8) & 0xff)
171 | ((x << 8) & 0x00ff0000) 177 | ((x << 8) & 0x00ff0000)
172 | (x << 24); 178 | (x << 24);
… …
175 181
176#if ECB_GCC_VERSION(4,5) 182#if ECB_GCC_VERSION(4,5)
177 #define ecb_unreachable() __builtin_unreachable () 183 #define ecb_unreachable() __builtin_unreachable ()
178#else 184#else
179 /* this seems to work fine, but gcc always emits a warning for it :/ */ 185 /* this seems to work fine, but gcc always emits a warning for it :/ */
180 ECB_HEADER_INLINE void ecb_unreachable (void) ecb_noreturn; 186 ecb_function_ void ecb_unreachable (void) ecb_noreturn;
181 ECB_HEADER_INLINE void ecb_unreachable (void) { } 187 ecb_function_ void ecb_unreachable (void) { }
182#endif 188#endif
183 189
190/* try to tell the compiler that some condition is definitely true */
191#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
192
184ECB_HEADER_INLINE unsigned char ecb_byteorder_helper (void) ecb_const; 193ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;
185ECB_HEADER_INLINE unsigned char 194ecb_function_ unsigned char
186ecb_byteorder_helper (void) 195ecb_byteorder_helper (void)
187{ 196{
188 const uint32_t u = 0x11223344; 197 const uint32_t u = 0x11223344;
189 return *(unsigned char *)&u; 198 return *(unsigned char *)&u;
190} 199}
191 200
192ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) ecb_const; 201ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;
193ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }; 202ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
194ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) ecb_const; 203ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;
195ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }; 204ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
196 205
197#if ECB_GCC_VERSION(3,0) 206#if ECB_GCC_VERSION(3,0) || ECB_C99
198 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) 207 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
199#else 208#else
200 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) 209 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
201#endif 210#endif
202 211
203#if ecb_cplusplus_does_not_suck 212#if ecb_cplusplus_does_not_suck
204 // does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) 213 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
205 template<typename T, int N> 214 template<typename T, int N>
206 static inline int ecb_array_length (const T (&arr)[N]) 215 static inline int ecb_array_length (const T (&arr)[N])
207 { 216 {
208 return N; 217 return N;
209 } 218 }

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