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: |
… | |
… | |
53 | typedef _Bool ecb_bool; |
53 | typedef _Bool ecb_bool; |
54 | # else |
54 | # else |
55 | # define ECB_INLINE inline /* yeah! */ |
55 | # define ECB_INLINE inline /* yeah! */ |
56 | typedef int ecb_bool; |
56 | typedef int ecb_bool; |
57 | # endif |
57 | # endif |
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58 | #else |
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59 | # define ECB_INLINE inline |
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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 |
… | |
… | |
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 | |
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89 | #define ecb_artificial ecb_attribute ((__artificial__)) /* 4.3 */ |
86 | #define ecb_noinline ecb_attribute ((noinline)) |
90 | #define ecb_noinline ecb_attribute ((__noinline__)) |
87 | #define ecb_noreturn ecb_attribute ((noreturn)) |
91 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
88 | #define ecb_unused ecb_attribute ((unused)) |
92 | #define ecb_unused ecb_attribute ((__unused__)) |
89 | #define ecb_const ecb_attribute ((const)) |
93 | #define ecb_const ecb_attribute ((__const__)) |
90 | #define ecb_pure ecb_attribute ((pure)) |
94 | #define ecb_pure ecb_attribute ((__pure__)) |
91 | #define ecb_hot ecb_attribute ((hot)) /* 4.3 */ |
95 | #define ecb_hot ecb_attribute ((__hot__)) /* 4.3 */ |
92 | #define ecb_cold ecb_attribute ((cold)) /* 4.3 */ |
96 | #define ecb_cold ecb_attribute ((__cold__)) /* 4.3 */ |
93 | |
97 | |
94 | /* put into if's if you are very sure that the expression */ |
98 | /* put into if's if you are very sure that the expression */ |
95 | /* is mostly true or mosty false. note that these return */ |
99 | /* is mostly true or mostly false. note that these return */ |
96 | /* booleans, not the expression. */ |
100 | /* booleans, not the expression. */ |
97 | #define ecb_unlikely(expr) ecb_expect (!!(expr), 0) |
101 | #define ecb_expect_false(expr) ecb_expect (!!(expr), 0) |
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102 | #define ecb_expect_true(expr) ecb_expect (!!(expr), 1) |
98 | #define ecb_likely(expr) ecb_expect (!!(expr), 1) |
103 | #define ecb_likely(expr) ecb_expect_true (expr) |
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104 | #define ecb_unlikely(expr) ecb_expect_false (expr) |
99 | |
105 | |
100 | /* try to tell the compiler that some condition is definitely true */ |
106 | /* try to tell the compiler that some condition is definitely true */ |
101 | #define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) |
107 | #define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) |
102 | |
108 | |
103 | /* count trailing zero bits and count # of one bits */ |
109 | /* count trailing zero bits and count # of one bits */ |
104 | #if ECB_GCC_VERSION(3,4) |
110 | #if ECB_GCC_VERSION(3,4) |
105 | #define ecb_ctz32 (x) __builtin_ctz (x) |
111 | #define ecb_ctz32(x) __builtin_ctz (x) |
106 | #define ecb_popcount32 (x) __builtin_popcount (x) |
112 | #define ecb_popcount32(x) __builtin_popcount (x) |
107 | #else |
113 | #else |
108 | ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const; |
114 | ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const; |
109 | ECB_HEADER_INLINE |
115 | ECB_HEADER_INLINE |
110 | ecb_ctz32 (uint32_t x) |
116 | ecb_ctz32 (uint32_t x) |
111 | { |
117 | { |
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178 | ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) ecb_const; |
184 | ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) ecb_const; |
179 | ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }; |
185 | ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }; |
180 | ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) ecb_const; |
186 | ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) ecb_const; |
181 | ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }; |
187 | ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }; |
182 | |
188 | |
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189 | #if ECB_GCC_VERSION(3,0) |
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190 | # define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
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191 | #else |
183 | #define ecb_mod(m, n) ((m) < 0 ? ((n) - (-(m) % (n))) : ((m) % (n))) |
192 | # define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
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193 | #endif |
184 | |
194 | |
185 | #if ecb_cplusplus_does_not_suck |
195 | #if ecb_cplusplus_does_not_suck |
186 | // does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) |
196 | // does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) |
187 | template<typename T, int N> |
197 | template<typename T, int N> |
188 | static inline int ecb_array_length (const T (&arr)[N]) |
198 | static inline int ecb_array_length (const T (&arr)[N]) |