… | |
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28 | */ |
28 | */ |
29 | |
29 | |
30 | #ifndef ECB_H |
30 | #ifndef ECB_H |
31 | #define ECB_H |
31 | #define ECB_H |
32 | |
32 | |
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33 | #ifdef _WIN32 |
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34 | typedef signed char int8_t; |
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35 | typedef unsigned char uint8_t; |
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36 | typedef signed short int16_t; |
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37 | typedef unsigned short uint16_t; |
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38 | typedef signed int int32_t; |
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39 | typedef unsigned int uint32_t; |
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40 | #if __GNUC__ |
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41 | typedef signed long long int64_t; |
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42 | typedef unsigned long long uint64_t; |
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43 | #else |
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44 | typedef signed __int64 int64_t; |
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45 | typedef unsigned __int64 uint64_t; |
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46 | #endif |
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47 | #else |
33 | #include <inttypes.h> |
48 | #include <inttypes.h> |
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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(__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))) |
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63 | #endif |
47 | # endif |
64 | #endif |
48 | #endif |
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49 | |
65 | |
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66 | #define ECB_C99 (__STDC_VERSION__ >= 199901L) |
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67 | |
50 | #ifndef __cplusplus |
68 | #if __cplusplus |
51 | # if __STDC_VERSION__ >= 199901L |
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52 | # define ECB_INLINE static inline |
69 | #define ECB_INLINE static inline |
53 | typedef _Bool ecb_bool; |
70 | #elif ECB_GCC_VERSION(2,5) |
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71 | #define ECB_INLINE static __inline__ |
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72 | #elif ECB_C99 |
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73 | #define ECB_INLINE static inline |
54 | # else |
74 | #else |
55 | # define ECB_INLINE static inline /* yeah! */ |
75 | #define ECB_INLINE static |
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76 | #endif |
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77 | |
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78 | #if ECB_GCC_VERSION(3,3) |
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79 | #define ecb_restrict __restrict__ |
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80 | #elif ECB_C99 |
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81 | #define ecb_restrict restrict |
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82 | #else |
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83 | #define ecb_restrict |
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84 | #endif |
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85 | |
56 | typedef int ecb_bool; |
86 | typedef int ecb_bool; |
57 | # endif |
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58 | #else |
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59 | # define ECB_INLINE static inline |
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60 | typedef bool ecb_bool; |
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61 | #endif |
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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) |
110 | /* for compatibility to the rest of the world */ |
135 | /* for compatibility to the rest of the world */ |
111 | #define ecb_likely(expr) ecb_expect_true (expr) |
136 | #define ecb_likely(expr) ecb_expect_true (expr) |
112 | #define ecb_unlikely(expr) ecb_expect_false (expr) |
137 | #define ecb_unlikely(expr) ecb_expect_false (expr) |
113 | |
138 | |
114 | /* try to tell the compiler that some condition is definitely true */ |
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115 | #define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) |
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116 | |
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117 | /* count trailing zero bits and count # of one bits */ |
139 | /* count trailing zero bits and count # of one bits */ |
118 | #if ECB_GCC_VERSION(3,4) |
140 | #if ECB_GCC_VERSION(3,4) |
119 | #define ecb_ctz32(x) __builtin_ctz (x) |
141 | #define ecb_ctz32(x) __builtin_ctz (x) |
120 | #define ecb_popcount32(x) __builtin_popcount (x) |
142 | #define ecb_popcount32(x) __builtin_popcount (x) |
121 | #else |
143 | #else |
122 | ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const; |
144 | ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; |
123 | ECB_HEADER_INLINE int |
145 | ecb_function_ int |
124 | ecb_ctz32 (uint32_t x) |
146 | ecb_ctz32 (uint32_t x) |
125 | { |
147 | { |
126 | int r = 0; |
148 | int r = 0; |
127 | |
149 | |
128 | x &= -x; /* this isolates the lowest bit */ |
150 | x &= -x; /* this isolates the lowest bit */ |
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134 | if (x & 0xffff0000) r += 16; |
156 | if (x & 0xffff0000) r += 16; |
135 | |
157 | |
136 | return r; |
158 | return r; |
137 | } |
159 | } |
138 | |
160 | |
139 | ECB_HEADER_INLINE int ecb_popcount32 (uint32_t x) ecb_const; |
161 | ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; |
140 | ECB_HEADER_INLINE int |
162 | ecb_function_ int |
141 | ecb_popcount32 (uint32_t x) |
163 | ecb_popcount32 (uint32_t x) |
142 | { |
164 | { |
143 | x -= (x >> 1) & 0x55555555; |
165 | x -= (x >> 1) & 0x55555555; |
144 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
166 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
145 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
167 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
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151 | |
173 | |
152 | #if ECB_GCC_VERSION(4,3) |
174 | #if ECB_GCC_VERSION(4,3) |
153 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
175 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
154 | #define ecb_bswap16(x) (__builtin_bswap32(x) >> 16) |
176 | #define ecb_bswap16(x) (__builtin_bswap32(x) >> 16) |
155 | #else |
177 | #else |
156 | ECB_HEADER_INLINE uint32_t ecb_bswap32 (uint32_t x) ecb_const; |
178 | ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; |
157 | ECB_HEADER_INLINE uint32_t |
179 | ecb_function_ uint32_t |
158 | ecb_bswap32 (uint32_t x) |
180 | ecb_bswap32 (uint32_t x) |
159 | { |
181 | { |
160 | return (x >> 24) |
182 | return (x >> 24) |
161 | | ((x >> 8) & 0x0000ff00) |
183 | | ((x >> 8) & 0x0000ff00) |
162 | | ((x << 8) & 0x00ff0000) |
184 | | ((x << 8) & 0x00ff0000) |
163 | | (x << 24); |
185 | | (x << 24); |
164 | } |
186 | } |
165 | |
187 | |
166 | ECB_HEADER_INLINE uint32_t ecb_bswap16 (uint32_t x) ecb_const; |
188 | ecb_function_ uint32_t ecb_bswap16 (uint32_t x) ecb_const; |
167 | ECB_HEADER_INLINE uint32_t |
189 | ecb_function_ uint32_t |
168 | ecb_bswap16 (uint32_t x) |
190 | ecb_bswap16 (uint32_t x) |
169 | { |
191 | { |
170 | return ((x >> 8) & 0xff) |
192 | return ((x >> 8) & 0xff) |
171 | | ((x << 8) & 0x00ff0000) |
193 | | ((x << 8) & 0x00ff0000) |
172 | | (x << 24); |
194 | | (x << 24); |
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175 | |
197 | |
176 | #if ECB_GCC_VERSION(4,5) |
198 | #if ECB_GCC_VERSION(4,5) |
177 | #define ecb_unreachable() __builtin_unreachable () |
199 | #define ecb_unreachable() __builtin_unreachable () |
178 | #else |
200 | #else |
179 | /* 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 :/ */ |
180 | ECB_HEADER_INLINE void ecb_unreachable (void) ecb_noreturn; |
202 | ecb_function_ void ecb_unreachable (void) ecb_noreturn; |
181 | ECB_HEADER_INLINE void ecb_unreachable (void) { } |
203 | ecb_function_ void ecb_unreachable (void) { } |
182 | #endif |
204 | #endif |
183 | |
205 | |
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206 | /* try to tell the compiler that some condition is definitely true */ |
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207 | #define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) |
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208 | |
184 | ECB_HEADER_INLINE unsigned char ecb_byteorder_helper (void) ecb_const; |
209 | ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const; |
185 | ECB_HEADER_INLINE unsigned char |
210 | ecb_function_ unsigned char |
186 | ecb_byteorder_helper (void) |
211 | ecb_byteorder_helper (void) |
187 | { |
212 | { |
188 | const uint32_t u = 0x11223344; |
213 | const uint32_t u = 0x11223344; |
189 | return *(unsigned char *)&u; |
214 | return *(unsigned char *)&u; |
190 | } |
215 | } |
191 | |
216 | |
192 | ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) ecb_const; |
217 | ecb_function_ ecb_bool ecb_big_endian (void) ecb_const; |
193 | ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }; |
218 | ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } |
194 | ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) ecb_const; |
219 | ecb_function_ ecb_bool ecb_little_endian (void) ecb_const; |
195 | ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }; |
220 | ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } |
196 | |
221 | |
197 | #if ECB_GCC_VERSION(3,0) |
222 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
198 | #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)) |
199 | #else |
224 | #else |
200 | #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))) |
201 | #endif |
226 | #endif |
202 | |
227 | |
203 | #if ecb_cplusplus_does_not_suck |
228 | #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) |
229 | /* 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> |
230 | template<typename T, int N> |
206 | static inline int ecb_array_length (const T (&arr)[N]) |
231 | static inline int ecb_array_length (const T (&arr)[N]) |
207 | { |
232 | { |
208 | return N; |
233 | return N; |
209 | } |
234 | } |