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Comparing libecb/ecb.h (file contents):
Revision 1.19 by root, Thu May 26 18:43:48 2011 UTC vs.
Revision 1.32 by root, Wed Jun 1 01:02:31 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:
… …
53typedef _Bool ecb_bool; 53typedef _Bool ecb_bool;
54# else 54# else
55# define ECB_INLINE inline /* yeah! */ 55# define ECB_INLINE inline /* yeah! */
56typedef int ecb_bool; 56typedef int ecb_bool;
57# endif 57# endif
58#else
59# define ECB_INLINE inline
60typedef 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
… …
64 67
65#define ECB_HEADER_INLINE static ECB_INLINE 68#define ECB_HEADER_INLINE static ECB_INLINE
66 69
67#if ECB_GCC_VERSION(3,1) 70#if ECB_GCC_VERSION(3,1)
68# define ecb_attribute(attrlist) __attribute__(attrlist) 71# define ecb_attribute(attrlist) __attribute__(attrlist)
69# define ecb_is_constant(c) __builtin_constant_p (c) 72# define ecb_is_constant(expr) __builtin_constant_p (expr)
70# define ecb_expect(expr,value) __builtin_expect ((expr),(value)) 73# define ecb_expect(expr,value) __builtin_expect ((expr),(value))
71# define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) 74# define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
72#else 75#else
73# define ecb_attribute(attrlist) 76# define ecb_attribute(attrlist)
74# define ecb_is_constant(c) 0 77# define ecb_is_constant(expr) 0
75# define ecb_expect(expr,value) (expr) 78# define ecb_expect(expr,value) (expr)
76# define ecb_prefetch(addr,rw,locality) 79# define ecb_prefetch(addr,rw,locality)
77#endif 80#endif
78 81
79/* no emulation for ecb_decltype */ 82/* no emulation for ecb_decltype */
… …
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
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 ifs 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 mosty 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_unlikely(expr) ecb_expect (!!(expr), 0)
98#define ecb_likely(expr) ecb_expect (!!(expr), 1) 102#define ecb_likely(expr) ecb_expect (!!(expr), 1)
99 103
100/* try to tell the compiler that some condition is definitely true */ 104/* try to tell the compiler that some condition is definitely true */
101#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) 105#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
102 106
103/* count trailing zero bits and count # of one bits */ 107/* count trailing zero bits and count # of one bits */
104#if ECB_GCC_VERSION(3,4) 108#if ECB_GCC_VERSION(3,4)
105#define ecb_ctz32 (x) __builtin_ctz (x) 109#define ecb_ctz32(x) __builtin_ctz (x)
106#define ecb_popcount32 (x) __builtin_popcount (x) 110#define ecb_popcount32(x) __builtin_popcount (x)
107#else 111#else
108ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const; 112ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const;
109ECB_HEADER_INLINE 113ECB_HEADER_INLINE
110ecb_ctz32 (uint32_t x) 114ecb_ctz32 (uint32_t x)
111{ 115{
… …
135} 139}
136#endif 140#endif
137 141
138#if ECB_GCC_VERSION(4,3) 142#if ECB_GCC_VERSION(4,3)
139# define ecb_bswap32(x) __builtin_bswap32 (x) 143# define ecb_bswap32(x) __builtin_bswap32 (x)
144# define ecb_bswap16(x) (__builtin_bswap32(x) >> 16)
140#else 145#else
141ECB_HEADER_INLINE uint32_t ecb_bswap32 (uint32_t x) ecb_const; 146ECB_HEADER_INLINE uint32_t ecb_bswap32 (uint32_t x) ecb_const;
142ECB_HEADER_INLINE uint32_t 147ECB_HEADER_INLINE uint32_t
143ecb_bswap32 (uint32_t x) 148ecb_bswap32 (uint32_t x)
144{ 149{
145 return (x >> 24) 150 return (x >> 24)
146 | ((x >> 8) & 0x0000ff00) 151 | ((x >> 8) & 0x0000ff00)
147 | ((x << 8) & 0x00ff0000) 152 | ((x << 8) & 0x00ff0000)
148 | (x << 24); 153 | (x << 24);
149} 154}
155
156ECB_HEADER_INLINE uint32_t ecb_bswap16 (uint32_t x) ecb_const;
157ECB_HEADER_INLINE uint32_t
158ecb_bswap16 (uint32_t x)
159{
160 return ((x >> 8) & 0xff)
161 | ((x << 8) & 0x00ff0000)
162 | (x << 24);
163}
150#endif 164#endif
151 165
152#if ECB_GCC_VERSION(4,5) 166#if ECB_GCC_VERSION(4,5)
153# define ecb_unreachable() __builtin_unreachable () 167# define ecb_unreachable() __builtin_unreachable ()
154#else 168#else
155/* this seems to work fine, but gcc always emits a warning for it :/ */ 169/* this seems to work fine, but gcc always emits a warning for it :/ */
156ECB_HEADER_INLINE void ecb_unreachable (void) ecb_noreturn; 170ECB_HEADER_INLINE void ecb_unreachable (void) ecb_noreturn;
157ECB_HEADER_INLINE void ecb_unreachable (void) { } 171ECB_HEADER_INLINE void ecb_unreachable (void) { }
158#endif 172#endif
159 173
160ECB_HEADER_INLINE unsigned char ecb_byteorder_helper () ecb_const; 174ECB_HEADER_INLINE unsigned char ecb_byteorder_helper (void) ecb_const;
161ECB_HEADER_INLINE unsigned char 175ECB_HEADER_INLINE unsigned char
162ecb_byteorder_helper () 176ecb_byteorder_helper (void)
163{ 177{
164 const uint32_t u = 0x11223344; 178 const uint32_t u = 0x11223344;
165 return *(unsigned char *)&u; 179 return *(unsigned char *)&u;
166} 180}
167 181
168ECB_HEADER_INLINE ecb_bool ecb_big_endian () ecb_const; 182ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) ecb_const;
169ECB_HEADER_INLINE ecb_bool ecb_big_endian () { return ecb_byteorder_helper () == 0x11; }; 183ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; };
170ECB_HEADER_INLINE ecb_bool ecb_little_endian () ecb_const; 184ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) ecb_const;
171ECB_HEADER_INLINE ecb_bool ecb_little_endian () { return ecb_byteorder_helper () == 0x44; }; 185ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; };
186
187#if ECB_GCC_VERSION(3,0)
188# define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
189#else
190# define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
191#endif
172 192
173#if ecb_cplusplus_does_not_suck 193#if ecb_cplusplus_does_not_suck
174// does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) 194// does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm)
175template<typename T, int N> 195template<typename T, int N>
176static inline int ecb_array_length (const T (&arr)[N]) 196static inline int ecb_array_length (const T (&arr)[N])

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