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Comparing libecb/ecb.h (file contents):
Revision 1.29 by root, Mon May 30 16:22:55 2011 UTC vs.
Revision 1.34 by root, Fri Jun 10 12:20:14 2011 UTC

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:
… …
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))
… …
94#define ecb_pure ecb_attribute ((__pure__)) 94#define ecb_pure ecb_attribute ((__pure__))
95#define ecb_hot ecb_attribute ((__hot__)) /* 4.3 */ 95#define ecb_hot ecb_attribute ((__hot__)) /* 4.3 */
96#define ecb_cold ecb_attribute ((__cold__)) /* 4.3 */ 96#define ecb_cold ecb_attribute ((__cold__)) /* 4.3 */
97 97
98/* 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 */
99/* is mostly true or mosty false. note that these return */ 99/* is mostly true or mostly false. note that these return */
100/* booleans, not the expression. */ 100/* booleans, not the expression. */
101#define ecb_unlikely(expr) ecb_expect (!!(expr), 0) 101#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
102#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
102#define ecb_likely(expr) ecb_expect (!!(expr), 1) 103#define ecb_likely(expr) ecb_expect_true (expr)
104#define ecb_unlikely(expr) ecb_expect_false (expr)
103 105
104/* try to tell the compiler that some condition is definitely true */ 106/* try to tell the compiler that some condition is definitely true */
105#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) 107#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
106 108
107/* count trailing zero bits and count # of one bits */ 109/* count trailing zero bits and count # of one bits */
108#if ECB_GCC_VERSION(3,4) 110#if ECB_GCC_VERSION(3,4)
109#define ecb_ctz32(x) __builtin_ctz (x) 111#define ecb_ctz32(x) __builtin_ctz (x)
110#define ecb_popcount32(x) __builtin_popcount (x) 112#define ecb_popcount32(x) __builtin_popcount (x)
111#else 113#else
112ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const; 114ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const;
113ECB_HEADER_INLINE 115ECB_HEADER_INLINE int
114ecb_ctz32 (uint32_t x) 116ecb_ctz32 (uint32_t x)
115{ 117{
116 int r = 0; 118 int r = 0;
117 119
118 x &= -x; /* this isolates the lowest bit */ 120 x &= -x; /* this isolates the lowest bit */
… …
125 127
126 return r; 128 return r;
127} 129}
128 130
129ECB_HEADER_INLINE int ecb_popcount32 (uint32_t x) ecb_const; 131ECB_HEADER_INLINE int ecb_popcount32 (uint32_t x) ecb_const;
130ECB_HEADER_INLINE 132ECB_HEADER_INLINE int
131ecb_popcount32 (uint32_t x) 133ecb_popcount32 (uint32_t x)
132{ 134{
133 x -= (x >> 1) & 0x55555555; 135 x -= (x >> 1) & 0x55555555;
134 x = ((x >> 2) & 0x33333333) + (x & 0x33333333); 136 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
135 x = ((x >> 4) + x) & 0x0f0f0f0f; 137 x = ((x >> 4) + x) & 0x0f0f0f0f;
… …
182ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) ecb_const; 184ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) ecb_const;
183ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }; 185ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; };
184ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) ecb_const; 186ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) ecb_const;
185ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }; 187ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; };
186 188
189#if ECB_GCC_VERSION(3,0)
190# define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
191#else
187#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)))
193#endif
188 194
189#if ecb_cplusplus_does_not_suck 195#if ecb_cplusplus_does_not_suck
190// 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)
191template<typename T, int N> 197template<typename T, int N>
192static inline int ecb_array_length (const T (&arr)[N]) 198static inline int ecb_array_length (const T (&arr)[N])

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